2019年第10期共收录49篇

1. Variable Structure Linear Moving Horizon Estimator for Plant Protection UAV

Accession number: 20194807753450

Title of translation:

Authors: Chu, Hongyu (1); Ni, Junchao (1); Chang, Zhiyuan (1); Shao, Yanhua (1); Zhang, Xiaoqiang (1)

Author affiliation: (1) School of Information Engineering, Southwest University of Science and Technology, Mianyang; 621010, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 116-123

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to solve the delay caused by different sampling frequencies of multi-sensors in position estimation of plant protection unmanned aerial vehicle (UAV), a variable structure linear moving horizon estimator (VSL-MHE) was designed to process delay measurement values. Firstly, the measurement data of multiple sensor was serialized. Then the linear index method was used to determine the coordinates of the zero elements in the arrangement term, and the weighting matrix in the cost function was updated with the coordinates of the zero elements to change the structure of the estimator. Finally, the plant protection UAV position was estimated by VSL-MHE. The accuracy of the position estimation was verified from the actual flight tests. In the indoor experiment, the GPS output was simulated by the output of OptiTrack motion capture system, the frequency could be controlled in the range of 2~20 Hz. Through the fixed-point hover experiment, the positions estimated from VSL-MHE, MHE and the circular iterated extended Kalman filter (CIEKF) were compared with that obtained from OptiTrack, respectively. The maximum positional offset of VSL-MHE was smaller than the positional offset of the CIEKF and MHE. In the outdoor experiment, the range of path planning was set to be 40 m×30 m, and the maximum positional deviation from the VSL-MHE was less than that estimated from CIEKF and MHE. The experiment results showed that VSL-MHE can effectively reduce the adverse effects on the accuracy of position estimation. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 21

Main heading: Frequency estimation

Controlled terms: Antennas? - ?Cost functions? - ?Kalman filters? - ?Motion planning? - ?Unmanned aerial vehicles (UAV)

Uncontrolled terms: Iterated extended Kalman filter? - ?Motion capture system? - ?Moving horizon estimator? - ?Multiple sensors? - ?Plant protection? - ?Position estimation? - ?Position estimator? - ?Sampling frequencies

Classification code: 652.1 Aircraft, General? - ?921.5 Optimization Techniques

Numerical data indexing: Frequency 2.00e+00Hz to 2.00e+01Hz

DOI: 10.6041/j.issn.1000-1298.2019.10.013

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

2. Effects of Subsoiling on Soil Moisture and Crop Water Consumption in Farmland of Northern Henan Province

Accession number: 20194807752653

Title of translation:

Authors: Zhang, Kai (1); Liu, Zhandong (1); Qiang, Xiaoman (1); Mi, Zhaorong (2); Feng, Rongcheng (3); Sun, Jingsheng (1)

Author affiliation: (1) Key Laboratory for Crop Water Requirement and Its Regulation, Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang; 453002, China; (2) School of Horticulture and Landscape Architecture, Henan Institute of Science and Technology, Xinxiang; 453003, China; (3) Huojia County Agricultural Technology Extension Center, Xinxiang; 453800, China

Corresponding author: Sun, Jingsheng(jshsun623@163.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 251-258

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The object was to explore the reasonable technical index of subsoiling for the annual double cropping of winter wheat-summer maize in meadow soil of northern Henan Province. In 2017-2018, based on the data of field experiment, the subsoiling was conducted before sowing winter wheat in Huojia County of Henan Province. The experimental design used two kinds of subsoiling machine(T, traditional subsoiling machine; A, subsoiling + fertilization integrated machine)and three depths (D1, 30 cm; D2, 35 cm and D3, 40 cm)were set on the traditional subsoiling machine and a deep depth(D2, 35 cm)on subsoiling + fertilizer integrated machine, meanwhile, the conventional rotary tillage(CK, average tillage depth of 15 cm)was used as a control. The variations of crop yield and water use efficiency of each subsoiling treatment were analyzed by measuring soil bulk density, soil water content and crop yield and yield traits. The result showed that the subsoiling method could change the soil bulk density, and the soil bulk density in 10~30 cm soil layer was significantly reduced(p ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 31

Main heading: Crops

Controlled terms: Digital storage? - ?Efficiency? - ?Soil moisture? - ?Water supply

Uncontrolled terms: Henan Province? - ?Soil bulk density? - ?Subsoiling? - ?Water use efficiency? - ?Yield

Classification code: 446.1 Water Supply Systems? - ?483.1 Soils and Soil Mechanics? - ?722.1 Data Storage, Equipment and Techniques? - ?821.4 Agricultural Products? - ?913.1 Production Engineering

Numerical data indexing: Percentage 1.24e+01%, Percentage 2.85e+01%, Percentage 2.89e+01%, Percentage 3.49e+01%, Percentage 8.30e+00%, Size 0.00e+00m to 1.00e+00m, Size 1.00e-01m to 3.00e-01m, Size 1.50e-01m, Size 3.50e-01m, Size 4.00e-01m

DOI: 10.6041/j.issn.1000-1298.2019.10.029

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

3. Stiffness and Dynamics Analysis of SCARA Parallel Mechanism

Accession number: 20194807753708

Title of translation: SCARA

Authors: Zhu, Wei (1); Guo, Qian (1); Ma, Zhiyuan (1); Shen, Huiping (1); Wu, Guanglei (2)

Author affiliation: (1) School of Mechanical Engineering, Changzhou University, Changzhou; 213016, China; (2) School of Mechanical Engineering, Dalian University of Technology, Dalian; 116024, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 375-385

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: There is a wide range of industrial applications for the 4-DOF parallel mechanism which can achieve SCARA type output motion (three dimensional translation and one dimensional rotation). A novel four-degree-of-freedom high-speed parallel robot mechanism for SCARA was proposed, which consisted of two RSS branches and two R(SRS)2R branches. Firstly, the topological structure characteristics such as the POC set of moving platform and mobility were first obtained based on the design theory of position and orientation characteristic (POC) set. Secondly, the virtual spring method was used to establish the stiffness model of the branch and the static of the branch was given. The differential mapping of the virtual joint deformation to the end deformation in the branch was obtained by the spin method and the Cartesian stiffness matrix at the end of the mechanism was obtained according to the static equation. By means of a nondimensionalization of the stiffness matrix, the 6×6 inhomogeneous stiffness matrix was decomposed into two homogeneous sub-matrices, of which two performance indices, corresponding to the translational and rotational stiffnesses, were defined to evaluate the stiffness behaviors of the manipulators. And the stiffness index analysis of the mechanism was carried out, and the stiffness characteristics of the mechanism in different working planes were analyzed. In addition, the dynamic analysis of the mechanism was performed to solve the velocity and acceleration of the active pair, the passive pair and the moving platform of the mechanism. The dynamic equation of the mechanism was established by using the virtual work principle. Finally, the simulation was compared with the ADAMS three-dimensional model simulation to verify the dynamics. The correctness of the modeling laid the foundation for further research and practical application of the organization. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Stiffness matrix

Controlled terms: Deformation? - ?Degrees of freedom (mechanics)? - ?Dynamics? - ?Mechanisms? - ?Robotic arms? - ?Stiffness

Uncontrolled terms: Four degree of freedom? - ?Parallel mechanisms? - ?Parallel robot mechanisms? - ?Position and orientations? - ?Stiffness characteristics? - ?Three-dimensional model? - ?Virtual spring? - ?Virtual work principle

Classification code: 601.3 Mechanisms? - ?731.5 Robotics? - ?921.1 Algebra? - ?931.1 Mechanics? - ?951 Materials Science

DOI: 10.6041/j.issn.1000-1298.2019.10.044

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

4. Optimal Irrigation Schedule Based on DSSAT Model for Winter Wheat

Accession number: 20194807753711

Title of translation: DSSAT

Authors: Shao, Guangcheng (1); Wang, Zhiyu (1); Wang, Xiaojun (2); Tang, Shuhai (3); Yao, Huaizhu (4)

Author affiliation: (1) College of Agricultural Engineering, Hohai University, Nanjing; 210098, China; (2) State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing; 210029, China; (3) Lianshui Water Conservancy Research Institute, Huai’an; 223400, China; (4) Jiangsu Province Rural Water Conservancy Science and Technology Development Center, Nanjing; 210029, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 289-297

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to discuss the feasibility of DSSAT model in the optimization of irrigation schedule for winter wheat in different hydrological years, the corresponding design values of precipitation experience frequency of 25%, 50% and 75% were obtained by using the precipitation data of the growth period of winter wheat from 1985 to 2015 in Lianshui Water Conservancy Research Institute. After that the years from 2001 to 2016 in Huaian Station with close corresponding precipitation of three kinds of empirical frequencies were taken as the representative years, and that was 2007-2008 (wet year), 2006-2007 (normal year) and 2011-2012 (dry year). Fifteen irrigation schedules(T1~T15) were drawn up through different combinations of growth stages and irrigation times, and the irrigation schedules were simulated in three hydrological years by using the DSSAT model after the parameter estimation and verification. The results showed that after calibrated, the genetic coefficients of winter wheat could accurately reflect the main genetic characteristics. Considering the yield, irrigation water capacity and the water use efficiency of winter wheat as a whole, it was advisable to select the irrigation schedule T3 from 2007 to 2008 (wet year), from 2006 to 2007 (normal year), and from 2011 to 2012 (dry year). The schedule T3 was irrigated with 50 mm in the regreening period. The irrigation time of wintering, regreening and jointing periods were on December 25, February 20 and March 30, respectively. Under BCC-CSM1.1 climate model, RCP4.5 and RCP8.5 were considered to simulate the water and yield effect of winter wheat in 2030-2095 years, and then it was found that when the initial soil moisture content was 60% and 80% of the field capacity, T3 and T6 both had certain feasibility compared with the rainfed conditions. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 35

Main heading: Irrigation

Controlled terms: Climate models? - ?Crops? - ?Soil moisture? - ?Water management? - ?Water supply

Uncontrolled terms: Applicability? - ?Dssat models? - ?Huaibei Plain? - ?Hydrological years? - ?Irrigation schedule? - ?Winter wheat

Classification code: 443 Meteorology? - ?446.1 Water Supply Systems? - ?483.1 Soils and Soil Mechanics? - ?821.3 Agricultural Methods? - ?821.4 Agricultural Products? - ?921 Mathematics

Numerical data indexing: Age 2.03e+03yr to 2.10e+03yr, Percentage 2.50e+01%, Percentage 5.00e+01%, Percentage 6.00e+01%, Percentage 7.50e+01%, Percentage 8.00e+01%, Size 5.00e-02m

DOI: 10.6041/j.issn.1000-1298.2019.10.033

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

5. Design and Experiment of Farmland Information Collection Vehicle

Accession number: 20194807752978

Title of translation:

Authors: Yao, Zhaosheng (1, 2); Liu, Tao (1, 2); Liu, Shengping (3); Deng, Guoqiang (1, 2); Wu, Wei (1, 2); Sun, Chengming (1, 2)

Author affiliation: (1) Agricultural College of Yangzhou University, Yangzhou; 225009, China; (2) Jiangsu Co-innovation Center for Modern Production Technology of Grain Crops, Yangzhou; 225009, China; (3) Agricultural Information Institute, Chinese Academy of Agricultural Sciences, Beijing; 100081, China

Corresponding author: Sun, Chengming(cmsun@yzu.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 236-242

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to obtain the information of field environment and soil in a quicker and more convenient way, a type of information collection vehicle based on TCP was designed. The overall design of the vehicle system included power system, motion control system, power supply system, wireless image transmission system and sensor detection system. The corresponding data can be obtained by sensor detection system, which included DHT11 temperature and humidity sensor, photoresistor sensor, DS-CO2-20 carbon dioxide sensor and hot wire wind speed sensor. It was proposed to use the 5-DOF manipulator and the self-made soil sensor bit to obtain the soil temperature and humidity information. The composition and operation of the manipulator were analyzed and simulated by Matlab simulation. According to the results of the performance tests carried out on the collection vehicle in the wheat field, it can be seen that the overall design of the collection vehicle was reasonable. The vehicle had strong passability. The maximum tilt angle was up to 30° and the maximum remote control distance was 45 m. Precise pictures can be secured as well. Compared with those measured by common high-precision instruments, the data collected by the sensor integrated in the vehicle met the needs of experiment, as the correlation coefficient between the temperature, humidity, light intensity, CO2 concentration, wind speed, soil temperature and soil moisture measured by the agricultural information collection vehicle and the high-precision instruments was greater than 0.90. The collection vehicle can realize the function of obtaining field data in a large range at a fixed time, and replace and supplement the traditional Internet of things system. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Vehicle transmissions

Controlled terms: Carbon dioxide? - ?Electric power transmission? - ?Farms? - ?Image acquisition? - ?Internet of things? - ?Manipulators? - ?MATLAB? - ?Motion control? - ?Remote control? - ?Soil moisture ? - ?Temperature? - ?Wind

Uncontrolled terms: Agricultural informations? - ?Carbon dioxide sensors? - ?Collection vehicles? - ?Correlation coefficient? - ?Farmland information? - ?Information collections? - ?Temperature and humidity sensor? - ?Wireless image transmission

Classification code: 443.1 Atmospheric Properties? - ?483.1 Soils and Soil Mechanics? - ?602.2 Mechanical Transmissions? - ?641.1 Thermodynamics? - ?706.1.1 Electric Power Transmission? - ?723 Computer Software, Data Handling and Applications? - ?731.1 Control Systems? - ?731.3 Specific Variables Control? - ?804.2 Inorganic Compounds? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control? - ?921 Mathematics

Numerical data indexing: Size 4.50e+01m

DOI: 10.6041/j.issn.1000-1298.2019.10.027

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

6. Pressure Drop and Response Time Analysis of Magnetorheological Valve with Mosquito-plate Fluid Flow Channels

Accession number: 20194807752990

Title of translation:

Authors: Hu, Guoliang (1); Zheng, Kaiyang (1)

Author affiliation: (1) Key Laboratory of Conveyance and Equipment, Ministry of Education, East China Jiaotong University, Nanchang; 330013, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 401-409

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Magnetorheological (MR) valves are widely used in hydraulic systems due to its fast response time and pressure drop regulation. A MR valve with mosquito-plate fluid flow channels was developed, and the fluid flow channels that was separated by mosquito-plate arc baffle between the damping disk and positioning plate mainly consisted of two Newtonian fluid circular pipe flow, one Newtonian fluid annular flow, two non-Newtonian fluid disk flow and two non-Newtonian fluid spiral flow. The working principle and structure of the developed MR valve was expounded, and the mathematical model of pressure drop was also derived. Finite element modeling of the MR valve was carried out by ANSYS/Emag software to simulate the electromagnetic field, including achieving the changes of the magnetic flux density along the fluid flow paths, and the variation of pressure drop and yield stress was also analyzed. The simulation results showed that the pressure drop can reach 5.58 MPa at the applied current of 2.0 A. The test rig of the MR valve performance was set up, and the pressure drop was tested under different applied currents and simulated load cases. The experimental results showed that the pressure drop can reach 5.1 MPa when the applied current was 2.0 A, which had better performance compared with that of conventional radial flow MR valve. At the same time, the experimental results showed that the designed MR valve had a faster response time at different flow rates, and the rising response time was shorter than that of falling response time. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Non Newtonian flow

Controlled terms: Channel flow? - ?Drops? - ?Electromagnetic fields? - ?Flow measurement? - ?Flow of fluids? - ?Hydraulic equipment? - ?Non Newtonian liquids? - ?Plates (structural components)? - ?Pressure drop? - ?Radial flow ? - ?Response time (computer systems)? - ?Rheology? - ?Viscous flow? - ?Yield stress

Uncontrolled terms: Circular pipe flow? - ?Fast response time? - ?Magneto-rheological? - ?Magnetorheological valve? - ?Non-Newtonian fluids? - ?Response-time analysis? - ?Structure design? - ?Valve performance

Classification code: 408.2 Structural Members and Shapes? - ?631.1 Fluid Flow, General? - ?632.2 Hydraulic Equipment and Machinery? - ?701 Electricity and Magnetism? - ?931.1 Mechanics? - ?931.2 Physical Properties of Gases, Liquids and Solids? - ?951 Materials Science

Numerical data indexing: Electric_Current 2.00e+00A, Pressure 5.10e+06Pa, Pressure 5.58e+06Pa

DOI: 10.6041/j.issn.1000-1298.2019.10.047

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

7. Anomaly Event Detection for Farmland Information Monitoring Based on Improved CoSaMP

Accession number: 20194807752766

Title of translation: CoSaMP

Authors: Xiao, Liping (1, 2); Quan, Lazhen (1); Yu, Bo (2); Huo, Lanyu (2)

Author affiliation: (1) College of Engineering, Hunan Agricultural University, Changsha; 410128, China; (2) School of Electrical Engineering, Hunan Mechanicaland Electrical Polytechnic, Changsha; 410151, China

Corresponding author: Quan, Lazhen(qlz2008@21cn.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 230-235

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The wireless sensor network technology provides efficient and reliable technical means for farmland information monitoring in recent years. WSN is a self-organizing network composed of a large number of sensor nodes with sensing and computing capabilities. WSN can detect abnormal events in farmland information, such as fire, environmental pollution, etc. Considering the characteristics of the large monitoring area, limited energy of monitoring nodes and occasional abnormal events, an anomaly event detection for farmland information monitoring based on improved CoSaMP was presented. In the classical CoSaMP algorithm, the choice of similar atom was difficult, and the sparse K required was known. For distinguishing effectively, the correlation between the atoms, the Dice coefficients were used to choose the optimal atom. The PSNR had the similar fluctuation with the match signal residual, which can be used to adjust the number of iterations dynamically. Firstly, the article modeled the farmland sensor network, and optimized the position parameters of the sensor. Then the CoSaMP algorithm was improved, the quality of signal reconstruction was improved by Dice parameters, and the recognition rate of the algorithm was improved by PSNR algorithm. Finally, the algorithm was simulated by Matlab. The simulation results indicated that the algorithm’s abnormal event detection success rate was 20% higher than that of the existing algorithm, the network energy consumption was reduced by 15%, and the time of detecting was reduced by 50%. At the same time, it provided a theoretical basis for the intelligent monitoring of farmland information and had higher practical application value. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Farms

Controlled terms: Atoms? - ?Computation theory? - ?Dynamic positioning? - ?Energy utilization? - ?Information analysis? - ?MATLAB? - ?Monitoring? - ?Sensor nodes? - ?Signal reconstruction? - ?Wireless sensor networks

Uncontrolled terms: Abnormal event detections? - ?Compressive sensing? - ?DP-CoSaMP? - ?Environmental pollutions? - ?Event detection? - ?Information monitoring? - ?Network energy consumption? - ?Self-organizing network

Classification code: 525.3 Energy Utilization? - ?716.1 Information Theory and Signal Processing? - ?716.3 Radio Systems and Equipment? - ?721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory? - ?722 Computer Systems and Equipment? - ?722.3 Data Communication, Equipment and Techniques? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control? - ?903.1 Information Sources and Analysis? - ?921 Mathematics? - ?931.3 Atomic and Molecular Physics

Numerical data indexing: Percentage 1.50e+01%, Percentage 2.00e+01%, Percentage 5.00e+01%

DOI: 10.6041/j.issn.1000-1298.2019.10.026

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

8. Double Closed Loop Fuzzy PID Control Method of Tractor Body Leveling on Hilly and Mountainous Areas

Accession number: 20194807753655

Title of translation: PID

Authors: Qi, Wenchao (1); Li, Yanming (1); Zhang, Jinhui (1); Qin, Chengjin (1); Liu, Chengliang (1); Yin, Yuepeng (2)

Author affiliation: (1) School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China; (2) Shandong Wuzheng Group, Rizhao; 276800, China

Corresponding author: Li, Yanming(ymli@sjtu.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 17-23 and 34

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to improve the performance of automatic leveling control system of tractors in hilly and mountainous areas, based on the developed attitude adjustment mechanism of hilly mountain tractors, an automatic leveling control method for adjusting the swing angle of wheels by double closed loop fuzzy PID algorithm was proposed. The state space model of the controlled object was established, and a double closed-loop fuzzy PID control algorithm was designed based on the model. The simulation analysis of the automatic leveling control system showed that the double closed loop fuzzy PID control had better performance than the double closed loop PID control, which can effectively reduce the overshoot and leveling time. A large number of dynamic and static tests were carried out. The results showed that the proposed automatic leveling double closed-loop fuzzy PID control method had a leveling time of 12.5 s on the slope of 15°, the maximum leveling error was less than 0.5°, and there was no overshoot phenomenon. The absolute value of the difference between the left and right rear wheel swing angles was within ±1°; at the same time, driving at a speed of 1.98 km/h in a harsh working environment with high and low undulations, the tilt angle of the body can be controlled within ±3°, and the absolute difference of the left and right wheel swing angles was within ±5°. Generally, the control method proposed had better control effect than double closed loop PID control. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 24

Main heading: Closed loop control systems

Controlled terms: State space methods? - ?Three term control systems? - ?Tractors (agricultural)? - ?Tractors (truck)? - ?Wheels

Uncontrolled terms: Absolute difference? - ?Active pose regulator? - ?Adjustment mechanisms? - ?Automatic leveling controls? - ?Fuzzy - pid controls? - ?Fuzzy-PID? - ?Hilly and mountainous areas? - ?State - space models

Classification code: 601.2 Machine Components? - ?663.1 Heavy Duty Motor Vehicles? - ?731.1 Control Systems? - ?921 Mathematics

Numerical data indexing: Time 1.25e+01s, Velocity 5.50e-01m/s

DOI: 10.6041/j.issn.1000-1298.2019.10.002

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

9. Subsoiler-induced Paddy Soil Disturbance and Effects Based on Video-assisted Multi-index Quantification

Accession number: 20194807753800

Title of translation:

Authors: Ding, Qishuo (1, 2); Li, Yang (1, 2); Adam, Belal Eisa (3); Liang, Lei (1, 2); He, Ruiyin (1, 2); Wang, Xiaochan (1, 2)

Author affiliation: (1) College of Engineering, Nanjing Agricultural University, Nanjing; 210031, China; (2) Key Laboratory of Intelligent Agricultural Equipment in Jiangsu Province, Nanjing; 210031, China; (3) Department of Agricultural Engineering, Zalingei University, Zalingei; 06, Sudan

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 44-55

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The pattern of soil disturbance by tillage tools is intimately linked with soil failure mechanisms and tilth quality, being a basis of tillage system optimization. In-situ video-assisted multi-index measurement is a pathway for the illustration on soil disturbance by tillage tools. The in-situ composite tillage test rig was applied for measuring subsoiler performance in paddy soil. Videos from five viewports were taken, and meanwhile, soil microrelief, traction, EDEM simulation, CI of disturbed soil profile and theoretical analysis were also measured to investigate how the chisel blade angle α and tillage depth D affected the pattern of soil disturbance, soil failure and tilth quality. Results showed that three indices can be derived from video-records, i.e., forward soil failure distance R, soil disturbance width W and lifting height H. All the three indices were significantly correlated with both α and D, and H was increased with α, while decreased with D, indicating that both design parameters and the working parameters of subsoiler can have its influence on soil lifting. R was linearly correlated with forward protruding length of the bent leg beneath soil surface, while W was increased with α. Both soil microrelief and soil disturbance width W reached the peak values at 20 cm tillage depth. EDEM simulation provided microscopic illustration on the soil disturbance by the subsoiler, reaffirming the video-recorded evidence of non-balanced soil failure, lateral compression failure and crescent failure patterns. Correspondence between EDEM simulation and video-recording also approved the scientific validness of the discrete models. EDEM simulation also revealed that stress-concentration region periodically shifted up and down along the bent leg. Downward compression effect also appeared beneath the chisel. The CI contour map of subsoiling trench profile not only affirmed the simulated compressing region, but also revealed the sideway rheological soil displacement and the resulted compact side walls at 30 cm tillage depth. The results proved that video-assisted multi-index measurement was an important means for optimized subsoiler design for paddy soil. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 67

Main heading: Soil surveys

Controlled terms: Agriculture? - ?Failure (mechanical)? - ?Soils? - ?Tools? - ?Video recording

Uncontrolled terms: Compression effects? - ?Design parameters? - ?Lateral compression? - ?Paddy soils? - ?Soil disturbances? - ?Subsoiling? - ?Tillage effects? - ?Working parameters

Classification code: 483.1 Soils and Soil Mechanics? - ?716.4 Television Systems and Equipment? - ?821 Agricultural Equipment and Methods; Vegetation and Pest Control

Numerical data indexing: Size 2.00e-01m, Size 3.00e-01m

DOI: 10.6041/j.issn.1000-1298.2019.10.005

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

10. Experiment on Feed Gelatinization Parameters Based on Homogeneous Plate Heating Method

Accession number: 20194807752760

Title of translation:

Authors: Jin, Nan (1); Fang, Peng (1); Wang, Hongying (1); Duan, Enze (1)

Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China

Corresponding author: Wang, Hongying(hongyingw@cau.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 329-336

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In the study of gelatinization characteristics and kinetics of starchy raw materials, hydrothermal treatment with controllable parameters was needed, but the effect of heating methods on homogenization of temperature distribution of samples was usually neglected. A device and method for clamping and heating feed samples with cast aluminium plates were presented. The moisture-adjusted feed samples were sealed in zip lock bags and clamped in a set of parallel temperature-controlled cast aluminium plates for heating treatment. Based on one-dimensional heat conduction equation, the temperature curves from room temperature to setting temperature were obtained by using the finite difference method of Matlab, and the temperature homogenization of feed samples during heating process was evaluated. The results showed that the device could achieve full homogenization of samples temperature distribution in a short time, and the time scale for achieving homogeneous temperature distribution of samples was much smaller than the gelatinization time scale, which indicated that the time for heat treatment of samples could be controlled accurately. On this basis, taking the formula feed for finishing pigs as research material, the pasting temperature, pasting time and feed moisture were selected as the influencing factors, and the degree of gelatinization was selected as evaluating indicators, thus the quadratic regression orthogonal rotatory combination experiments were carried out. As a consequence, the order of influence of each factor on feed gelatinization degree was feed moisture, pasting temperature and pasting time. A quadratic regression model (R2=0.942 0) for feed gelatinization degree and three factors was established by regression analysis and response surface analysis with Design-Expert software, and the validity of the regression model was verified. In the analysis of chromatic aberration of feed samples after heat treatment, it was found that excessive heat treatment temperature would not increase the gelatinization degree of feed under certain conditions; on the contrary, it would intensify Maillard reaction leading to the deepening of feed color and affecting the appearance quality. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 27

Main heading: Quality control

Controlled terms: Aberrations? - ?After-heat treatment? - ?Aluminum? - ?Aluminum plating? - ?Finite difference method? - ?Gelation? - ?Heat conduction? - ?Heating? - ?Homogenization method? - ?Mammals ? - ?MATLAB? - ?Moisture? - ?Regression analysis? - ?Surface analysis? - ?Temperature distribution

Uncontrolled terms: Chromatic aberration? - ?Degree of gelatinization? - ?Gelatinization characteristics? - ?Gelatinization parameters? - ?Heat treatment temperature? - ?Plant heating? - ?Response surface analysis? - ?Temperature homogenization

Classification code: 541.1 Aluminum? - ?641.1 Thermodynamics? - ?641.2 Heat Transfer? - ?802.3 Chemical Operations? - ?913.3 Quality Assurance and Control? - ?921 Mathematics? - ?921.6 Numerical Methods? - ?922.2 Mathematical Statistics? - ?951 Materials Science

DOI: 10.6041/j.issn.1000-1298.2019.10.038

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

11. Mixed Proportion Identification of Freshwater Fish Based on Passive Underwater Acoustic Signals

Accession number: 20194807752769

Title of translation:

Authors: Huang, Hanying (1); Yang, Yongwen (1); Li, Lu (1); Zhao, Siming (2); Xiong, Shanbai (2); Tu, Qunzi (1)

Author affiliation: (1) College of Engineering, Huazhong Agricultural University, Wuhan; 430070, China; (2) College of Food Science and Technology, Huazhong Agricultural University, Wuhan; 430070, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 215-221

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The rational polyculture and close cultivation of multi-species freshwater fish have great practical significance in aquaculture. Aiming to identify the mixed proportions of freshwater fish, bream fish and crucian carp were taken as the research object. The passive acoustic signals of different proportions of freshwater fish were collected by hydrophone. The butter function was used for signal preprocessing. Then short-time average energy, short-time average zero-crossing rate, four layer wavelet packet decomposition frequency band energy, average Mel cepstrum coefficient, main peak frequency and principal peaks based on power spectrum were extracted to construct eigenvectors. The support vector machine model based on principal component analysis was used to realize the mixed proportion identification. The significant differences among the acoustic signals of freshwater fish with different mixed proportions were analyzed, and the influences of the number of principal component on the recognition rate of the model were studied. The results showed that the average Mel cepstrum coefficient had the most significant effect on the mixed proportions recognition of freshwater fish, and the effect of proportional recognition was the best by selecting the first 19 principal components. The average accuracy rate was 96.43% and Kappa coefficient was 0.96. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 23

Main heading: Underwater acoustics

Controlled terms: Acoustic waves? - ?Fish? - ?Principal component analysis? - ?Support vector machines? - ?Water? - ?Wavelet decomposition

Uncontrolled terms: Frequency band energies? - ?Freshwater fishes? - ?Mel cepstrum coefficients? - ?Number of principal components? - ?Proportions recognition? - ?Support vector machine models? - ?Underwater acoustic signal? - ?Wavelet Packet Decomposition

Classification code: 723 Computer Software, Data Handling and Applications? - ?751.1 Acoustic Waves? - ?921.3 Mathematical Transformations? - ?922.2 Mathematical Statistics

Numerical data indexing: Percentage 9.64e+01%

DOI: 10.6041/j.issn.1000-1298.2019.10.024

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

12. Effects of Digestate on Tomato Growth and Soil Ecological Environment in Greenhouse

Accession number: 20194807753682

Title of translation:

Authors: Zheng, Jian (1, 2); Yin, Ligao (1, 3); Zhu, Chuanyuan (1, 3); Ma, Jing (1, 3); Zhang, Ping’an (1, 3)

Author affiliation: (1) College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; (2) Key Laboratory of the System of Biomass Energy and Solar Energy Complementary Energy Supply System in Gansu, Lanzhou; 730050, China; (3) Western Energy and Environment Research Center, Lanzhou University of Technology, Lanzhou; 730050, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 278-288

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: To explore the effects of digestate application on tomato growth and soil environment during the whole growing period of crop, the influences of digestate application ratio and irrigation amounts on tomato agronomic characteristics, quality, yield, soil physical, chemical environment and biological characteristics were systematically studied. The results showed that the plant height, stem diameter and leaf area of T3 treatment (digestate ratio was 1:4, and crop-pan coefficient (Kc) was 1.0) were the greatest, which were 24.11%, 15.59% and 33.92% higher than those of treatment C0 irrigated with water only, respectively. The application of digestate can increase the yield, quality and taste of tomato, in which the treatment of T2 (digestate ratio was 1:4, and Kc was 0.8) obtained the highest vitamin C and total soluble sugar content. Meanwhile, digestate application can decrease the soil bulk density and pH value, and subsequently increase the soil total porosity and saturated hydraulic conductivity. The content of soil organic matter was firstly increased and then decreased with the increase of soil depth in treatments applied with digestate. Furthermore, the application of digestate can also increase the number of bacteria, fungi and actinomycetes in each growth period of tomato, in which the quantity of soil bacteria and fungi presented an increase trend from seedling stage to fruit swelling stage, where they reached the peak value and then decreased, while the peak value of actinomycetes quantities appeared at fruit ripening stage. The activities of catalase, invertase and urease in the soil of tomato root zone presented the trend of increase continuously, first increase and then decrease, and first decrease and then increase during the whole growth period, and the peak value of them appeared at fruit ripening stage, fruit enlargement stage, flowering and fruiting stage, respectively. T2 treatment was more conducive to tomato growth when the agronomic traits, quality and yield, and soil biological characteristics of tomato were comprehensively analyzed. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 46

Main heading: Fruits

Controlled terms: Agronomy? - ?Bacteria? - ?Crops? - ?Fungi? - ?Hydraulic conductivity? - ?Image quality? - ?Soils? - ?Stages? - ?Water treatment

Uncontrolled terms: Biological characteristic? - ?Digestate? - ?Ecological environments? - ?Physicochemical environments? - ?Saturated hydraulic conductivity? - ?Soil organic matters? - ?Soluble sugar contents? - ?Yield

Classification code: 402.2 Public Buildings? - ?445.1 Water Treatment Techniques? - ?483.1 Soils and Soil Mechanics? - ?632.1 Hydraulics? - ?821.3 Agricultural Methods? - ?821.4 Agricultural Products

Numerical data indexing: Percentage 1.56e+01%, Percentage 2.41e+01%, Percentage 3.39e+01%

DOI: 10.6041/j.issn.1000-1298.2019.10.032

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

13. Body Temperature Detection Method of Ross Broiler Based on Infrared Thermography

Accession number: 20194807752774

Title of translation:

Authors: Shen, Mingxia (1); Lu, Pengyu (1); Liu, Longshen (1); Sun, Yuwen (1); Xu, Yi (2); Qin, Fuliang (1)

Author affiliation: (1) College of Engineering, Nanjing Agricultural University, Nanjing; 210031, China; (2) New Hope Liuhe Co., Ltd., Qingdao; 266100, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 222-229

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In broiler production, the temperature under the wing is an important indicator of animal health and welfare condition. Body temperature detection method of broiler based on infrared thermography was proposed to achieve measurement of broiler body temperature accurately and rapidly. The detected region of interest (ROI) model of broiler head and leg, based on a convolutional neural network, was developed to extract the maximum temperature of its head and leg. Besides, combined with ambient temperature, humidity and light intensity, two different broiler wing temperature inversion models were proposed by multiple linear regression and back propagation (BP)neural networks, respectively. And the experimental results showed that, based on the deep convolutional neural network, the ROI detected model achieved a precision and recall rate of 96.77% and 100% on the test dataset, respectively. What’s more, the temperature inversion models achieved an average relative error of 0.33% with multiple linear regression, while BP neural network was 0.29%. Deep learning method was used to obtain the ROI temperature, which was superior to the image processing method, high in efficiency and high in generalization ability. BP neural network model error was less than the error of multiple linear regression network model. Therefore, BP neural network can be applied as a temperature inversion model of broiler wings. BP neural network had the ability of self-learning and self-adaptation, and its generalization ability was strong. Applying it to the inversion of temperature under the wing can improve the accuracy and adaptability of the model. This model provided reliable technical support for real-time monitoring of broiler body temperature. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 29

Main heading: Backpropagation

Controlled terms: Atmospheric temperature? - ?Climatology? - ?Convolution? - ?Deep neural networks? - ?Errors? - ?Image segmentation? - ?Linear regression? - ?Neural networks? - ?Physiology? - ?Statistical tests ? - ?Thermography (imaging)? - ?Veterinary medicine

Uncontrolled terms: Body temperature? - ?BP neural networks? - ?Broiler? - ?Convolutional neural network? - ?Multiple linear regressions

Classification code: 443 Meteorology? - ?443.1 Atmospheric Properties? - ?461.9 Biology? - ?716.1 Information Theory and Signal Processing? - ?723.4 Artificial Intelligence? - ?742.1 Photography? - ?922.2 Mathematical Statistics

Numerical data indexing: Percentage 1.00e+02%, Percentage 2.90e-01%, Percentage 3.30e-01%, Percentage 9.68e+01%

DOI: 10.6041/j.issn.1000-1298.2019.10.025

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

14. Relationship between Water Distribution Change and Water Retention Properties of Yak Meat during Postmortem Aging

Accession number: 20194807753453

Title of translation:

Authors: Guo, Zhaobin (1); Yu, Qunli (1); Chen, Cheng (1); Han, Ling (1); Kong, Xiangying (2); Shi, Hongmei (3)

Author affiliation: (1) College of Food Science and Engineering, Gansu Agricultural University, Lanzhou; 730070, China; (2) Haibei Institute of Animal Science and Veterinary, Haibei; 810200, China; (3) Institute of Animal Science and Veterinary Science of Gannan Tibetan Autonomous Prefecture, Gannan; 747000, China

Corresponding author: Yu, Qunli(yuqunlihl@163.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 343-351

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to study the relationship between water distribution change and water retention properties of yak meat during postmortem aging, explore the mechanism of water holding capacity (WHC) after slaughter, 10 male yak in Qinghai Province were slaughtered and aging within 4, then the pressing loss, drip loss, cooking loss and surface hydrophobicity index were determined during different aging times, and the water distribution was analyzed by low-field nuclear magnetic resonance (LF-NMR) and nuclear magnetic resonance imaging (MRI), beef cattle were control group. The results showed that the pressing loss, drip loss, cooking loss and surface hydrophobicity index got the maximum value on the third day, which was significantly higher than other time points (p22 was decreased and P23 was increased, at the later stage of postmortem aging, P22 was increased and P23 was decreased, in addition, P22 and P23 had a significant negative correlation (p ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 34

Main heading: Nuclear magnetic resonance

Controlled terms: Hydrophobicity? - ?Magnetic resonance imaging? - ?Magnetism? - ?Meats? - ?Textile blends? - ?Thermal processing (foods)? - ?Water supply systems

Uncontrolled terms: Comparative analysis? - ?Distribution of water? - ?Low field nuclear magnetic resonance? - ?Low field nuclear magnetic resonance (LF NMR)? - ?Surface hydrophobicity? - ?Water distributions? - ?Water holding capacity? - ?Water retention properties

Classification code: 446.1 Water Supply Systems? - ?701.2 Magnetism: Basic Concepts and Phenomena? - ?819.5 Textile Products and Processing? - ?822.2 Food Processing Operations? - ?822.3 Food Products? - ?931.2 Physical Properties of Gases, Liquids and Solids

DOI: 10.6041/j.issn.1000-1298.2019.10.040

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

15. Investigation on Freeze-thaw Stability of BITC Nanoemulsion and Its Preparation by Jet-cavitation

Accession number: 20194807752482

Title of translation:

Authors: Tian, Tian (1); Zhou, Yan (1); Gao, Yue (1); Li, Yang (1, 2); Wang, Zhongjiang (1); Li, Liang (1)

Author affiliation: (1) College of Food Science, Northeast Agricultural University, Harbin; 150030, China; (2) Harbin Food Industry Research Institute, Harbin; 150028, China

Corresponding author: Li, Liang(15694164718@163.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 337-342 and 351

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The soy protein isolate-phosphatidylcholine (SPI-PC) was used as a composite emulsifier to encapsulate benzylisothiocyanate (BITC). The nanoemulsion was prepared by a jet cavitation machine to improve its freeze-thaw stability. The effect of jet cavitation press and freeze-thaw cycle on the freeze-thaw stability of nanoemulsion was studied by using oil yield and stratification coefficient as stability index. The thermal characteristics of emulsion freeze-thaw process were used to compare different jet-cavitation pressures. The thermal behavior of the modified soy protein isolate-phospholipid was taken as an emulsifier emulsion during crystallization and melting of the emulsion during freezing and thawing. The results showed that when the jet-cavitation pressure was 0.8 MPa, the layering coefficient of BITC nanoemulsion was 51.39% lower than that of the untreated sample, and the oil yield was 83.64% lower than that of the untreated sample. The average particle size was (252±6.2) nm, the PDI was 0.114±0.034, and the zeta potential was (-27.2±0.6) mV. It was observed that BITC was embedded in the composite emulsifier and evenly distributed in the emulsion system, and it was in a relatively stable state. By comparing the difference in thermal characteristics of the sample, it was reflected that the jet-cavitation modified protein-phospholipid could significantly increase the freeze-thaw stability of the emulsion. It provided a certain reference for improving the bioavailability of BITC in food and medicine. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 32

Main heading: Freezing

Controlled terms: Biochemistry? - ?Cavitation? - ?Emulsification? - ?Oils and fats? - ?Particle size? - ?Phospholipids? - ?Proteins? - ?Stability? - ?Thawing

Uncontrolled terms: Benzylisothiocyanate (BITC)? - ?Freeze-thaw stability? - ?Nanoemulsion? - ?Phosphatidylcholine? - ?Soy protein

Classification code: 631.1.1 Liquid Dynamics? - ?801.2 Biochemistry? - ?802.3 Chemical Operations? - ?804.1 Organic Compounds

Numerical data indexing: Percentage 5.14e+01%, Percentage 8.36e+01%, Pressure 8.00e+05Pa

DOI: 10.6041/j.issn.1000-1298.2019.10.039

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

16. Detection of Metal Content in Biochar Based on Serial Aad-partition Calibration Model Using LIBS

Accession number: 20194807753687

Title of translation: LIBS

Authors: Duan, Hongwei (1); Han, Lujia (1); Huang, Guangqun (1)

Author affiliation: (1) College of Engineering, China Agricultural University, Beijing; 100083, China

Corresponding author: Huang, Guangqun(huanggq@cau.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 323-328

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: To accurately detect the content of major metal elements in agribiochar using laser induced breakdown spectroscopy (LIBS) and improve its poor detection sensitivity, high temperature treatment was proposed to remove the effects of moisture, fixed carbon and organic matrix. Primarily, totally 66 representative agribiochar samples with Aad content ranging from 28% to 42% were collected and divided using multiple Aad-partition intervals (14%, 7%, 3.5% and 2%). Moreover, when the interval value was set to be 7%, the Aad-partition of the collected samples was divided into 28%~35% (38 samples) and 35%~42% (28 samples). And the corresponding determinant coefficient between raw samples and treated samples was higher than 0.96. Thus, it was possible to develop a serial Aad-partition calibration model using spectral information of treated samples and chemical information of raw samples. In comparison with the modeling effects of raw samples, the partial least squares regression (PLSR) models developed by treated samples had lower values of relative standard deviation of cross-validation set. The pairwise T test of its prediction set showed that there was no significant difference between the measurement of LIBS and inductively coupled plasma mass spectrometry (ICP-MS). The results showed that the LIBS can be used to simultaneous, accurate and quantitative analysis of major metal elements in agribiochar based on the high temperature treatment and serial Aad-partition calibration model. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Metals

Controlled terms: Atomic emission spectroscopy? - ?Inductively coupled plasma mass spectrometry? - ?Laser induced breakdown spectroscopy? - ?Least squares approximations? - ?Organic carbon? - ?Organic lasers

Uncontrolled terms: Agribiochar? - ?Calibration model? - ?Inductively coupled plasma mass spectrometries (ICPMS)? - ?Laserinduced breakdown spectroscopy (LIBS)? - ?Matrix effects? - ?Metal elements? - ?Partial least squares regressions (PLSR)? - ?Relative standard deviations

Classification code: 744.1 Lasers, General? - ?801 Chemistry? - ?804.1 Organic Compounds? - ?921.6 Numerical Methods? - ?931.1 Mechanics

Numerical data indexing: Percentage 1.40e+01%, Percentage 2.00e+00%, Percentage 2.80e+01% to 4.20e+01%, Percentage 3.50e+00%, Percentage 7.00e+00%

DOI: 10.6041/j.issn.1000-1298.2019.10.037

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

17. Three Dimensional Growth Modeling of Rice Root Based on Differential L-System

Accession number: 20194807753487

Title of translation: L-

Authors: Yang, Le (1, 2); Peng, Jun (1); Yang, Hongyun (2); Yi, Wenlong (2)

Author affiliation: (1) College of Computer and Information Engineering, Jiangxi Agricultural University, Nanchang; 330045, China; (2) Key Laboratory of Information Technology in Agriculture, College and Universities of Jiangxi Province, Nanchang; 330045, China

Corresponding author: Peng, Jun(totato@126.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 208-214

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The architecture of rice roots is the spatial configuration of its roots, which shows a high diversity. To explore the architecture and distribution characteristics of rice roots, hydroponics method experiments were conducted to measure three dimensional spatial coordinates and morphological parameters of rice roots at different growth stages, which quantified the structure of rice roots with high accuracy. After analyzing the experimental data, the initial position of the root node, growth direction of branches and the root growth function were determined. Three dimensional growth modeling of rice roots based on differential L-system was proposed to describe its growth rule by analyzing the topological structure and quantifying their biological characteristics, and the output accuracy of the model was tested. Visual C++ and OpenGL standard graphics library were used to implement the three-dimensional visualization simulation system for rice root growth, and the dynamic growth process of rice roots was visually reproduced. Analysis results indicated that the average simulated fitness of the total root length, surface area and volume were about 96.82%, 95.86% and 93.96%, respectively. Therefore, the model can express the morphological characteristics and growth rules of rice roots at different growth stages, and the results may form a base for forthcoming study on the relationship between morphological structure changes of rice roots at different growth stages and their physiological and ecological factors. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 33

Main heading: Three dimensional computer graphics

Controlled terms: Application programming interfaces (API)? - ?Computer software? - ?Flow visualization? - ?Physiological models? - ?Topology? - ?Visualization

Uncontrolled terms: Biological characteristic? - ?Distribution characteristics? - ?L-systems? - ?Morphological characteristic? - ?Morphological parameters? - ?Rice roots? - ?Three dimensional visualization? - ?Three-dimensional growth

Classification code: 631.1 Fluid Flow, General? - ?723 Computer Software, Data Handling and Applications? - ?921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory

Numerical data indexing: Percentage 9.40e+01%, Percentage 9.59e+01%, Percentage 9.68e+01%

DOI: 10.6041/j.issn.1000-1298.2019.10.023

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

18. Effects of Tea Polyphenols on Mitochondrial Apoptosis and Meat Tenderness in Post-mortem Yak Meat

Accession number: 20194807752768

Title of translation:

Authors: Wang, Linlin (1); Chen, Lianhong (1); Han, Ling (2); Li, Jian (1); Yu, Qunli (2); Cai, Zijian (1)

Author affiliation: (1) College of Life Science and Technology, Southwest University for Nationalities, Chengdu; 610041, China; (2) College of Food Science and Engineering, Gansu Agricultural University, Lanzhou; 730070, China

Corresponding author: Yu, Qunli(yuqunlihl@163.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 352-359 amd 366

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Aiming to investigate the effects of tea polyphenols on the mitochondrial apoptosis cascade reaction mediated by mitochondrial oxidative stress and tenderness of yak meat during postmortem aging. The longissimus dorsi muscles injected with inhibitor tea polyphenol were taken as the experiment objects. The levels of mitochondrial oxidative stress, degree of mitochondrial oxidative damage, mitochondrial functional characteristics, process of mitochondrial apoptosis and change of meat tenderness in the control group and the treatment group were measured. The results showed that the level of mitochondrial ROS, MDA and carbonyl content in the treatment group was overall significantly or extremely significantly lower than that in the control group in the early of postmortem aging. At the middle and late of aging time, the SOD activity and the mitochondrial membrane fluidity was significantly or extremely significantly higher than that in the control group. After 24 h, opening of the MPTP in the treatment group was significantly or extremely significantly lower than that in the control group. After 6~168 h, the Cyt-c concentration of mitochondria in the treatment group was higher than that in the control group; during 72~168 h, the Cyt-c concentration of cytoplasm in the treatment group was significantly or extremely significantly higher than that in the control group. Meanwhile, Caspase-3 activity and MFI in the treatment group was significantly or very significantly lower than that in the control group at early aging time. The research demonstrated that tea polyphenols inhibited the role of the mitochondrial apoptosis cascade reaction on the meat tenderization by inhibiting ROS mediated oxidative stress damage of mitochondrial structure and function. These observations indicated that tea polyphenols acted as the antioxidants and antistaling agent in improving the quality of meat at the same time, may have adverse effects on meat tenderization from the angle of the mechanism of apoptosis tenderization and further confirmation was needed. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 35

Main heading: Mitochondria

Controlled terms: Cell death? - ?Meats? - ?Oxidative stress? - ?Speed control

Uncontrolled terms: Cascade reactions? - ?Functional characteristics? - ?Longissimus dorsi? - ?Meat tenderizations? - ?Meat tenderness? - ?Mitochondrial apoptosis? - ?Mitochondrial membranes? - ?Tea polyphenols

Classification code: 461.2 Biological Materials and Tissue Engineering? - ?461.9 Biology? - ?731.3 Specific Variables Control? - ?822.3 Food Products

Numerical data indexing: Time 2.16e+04s to 6.05e+05s, Time 2.59e+05s to 6.05e+05s, Time 8.64e+04s

DOI: 10.6041/j.issn.1000-1298.2019.10.041

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

19. Monitoring of Wheat Biomass Based on Terrestrial-LiDAR Height Metric

Accession number: 20194807753742

Title of translation: LiDAR

Authors: Qiu, Xiaolei (1); Fang, Yuan (1); Guo, Tai (1); Cheng, Tao (1); Zhu, Yan (1); Yao, Xia (1)

Author affiliation: (1) National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, Nanjing; 210095, China

Corresponding author: Yao, Xia(yaoxia@njau.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 159-166

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Rapid, nondestructive and accurate monitoring of crop biomass is of great significance for crop productivity estimation and intelligent management. In order to explore the feasibility of monitoring crop biomass with light detection and ranging (LiDAR), LiDAR point cloud height metrics and aboveground biomass were obtained from field trials at key growth stages of wheat. Then based on the power function regression and support vector regression, the ten-fold cross-validation method was used to pick features and construct models, and the optimal wheat aboveground biomass monitoring models for whole growth period were selected respectively. Finally, the prediction abilities of the two models were tested and compared on the test set. The results showed that the support vector regression model constructed by the H95 and growth period provided the highest accuracy with an R2 being as high as 0.814 on training set, and its test results were with R2 of 0.821, RMSE of 1.730 t/hm2, and RRMSE of 32.77%, which indicated that the model possessed good accuracy and adaptability. The power function regression model constructed by Hmean provided an R2 of 0.809, and its test results were with R2 of 0.815, RMSE of 1.760 t/hm2, and RRMSE of 33.33%, which also indicated that the model possessed good accuracy and adaptability. Estimation of wheat biomass by a height metric had inherent limitations, and the two models were more suitable for monitoring the aboveground biomass of wheat values less than 10 t/hm2. On the whole sample set with aboveground biomass exceeding 10 t/hm2, 95% of the predicted values of the models were underestimated and RMSE was increased exponentially. The feature of growth period was helpful to improve the prediction accuracy of the monitoring model. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 28

Main heading: Optical radar

Controlled terms: Biomass? - ?Crops? - ?Ecology? - ?Monitoring? - ?Regression analysis

Uncontrolled terms: Cross-validation methods? - ?Height metric? - ?Intelligent management? - ?Light detection and ranging? - ?Support vector regression (SVR)? - ?Support vector regression models? - ?Terrestrial lidars? - ?Wheat

Classification code: 454.3 Ecology and Ecosystems? - ?716.2 Radar Systems and Equipment? - ?821.4 Agricultural Products? - ?922.2 Mathematical Statistics

Numerical data indexing: Percentage 3.28e+01%, Percentage 3.33e+01%, Percentage 9.50e+01%

DOI: 10.6041/j.issn.1000-1298.2019.10.018

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

20. Catalytic Pyrolysis of Biomass with Porous Ceramic Loading Aluminum Oxide

Accession number: 20194807753688

Title of translation: Al2O3

Authors: Bi, Dongmei (1); Zhang, Kaizhen (1); Yi, Weiming (1); Liu, Shanjian (1); Li, Bozheng (1)

Author affiliation: (1) School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo; 255000, China

Corresponding author: Yi, Weiming(yiweiming@sdut.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 315-322

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In view of the low mechanical strength and easy breakage of calcined dolomite when it is used as a biomass pyrolysis catalyst, one preparation method of porous ceramic balls with dolomite and quartz sand as main aggregate was proposed. The porous ceramic balls with high mechanical strength were impregnated with Al2(SO4)3 solutions (0.3 mol/L, 0.5 mol/L and 1.0 mol/L) at 25 for 6 h after firing. The load of Al2O3 on dolomite base porous ceramic balls was increased with the increase of Al2(SO4)3 solution concentration. In horizontal tube furnace, the dolomite base porous ceramic balls supported Al2O3 were used as catalyst to carry out fast pyrolysis experiment of corn straw powder. The results showed that the yield of the bio-oil was increased firstly and then decreased with the increase of relative mass content of dolomite, while the yield of bio-char was decreased firstly and then increased when the proportion of dolomite to quartz sand was 30:70, 40:60, 45:55 and 50:50, respectively. The yield of bio-oil reached the highest production rate of 36.85% and the yield of bio-char reached the lowest production rate of 25.11% when the proportion of dolomite to quartz sand was 40:60. With the increase of Al2(SO4)3 solution concentration, the yield of bio-oil was decreased and that of bio-char was decreased firstly and then increased. Compared with the untreated Al2(SO4)3 solution, the yield of bio-oil was decreased by 10.69%, 15.33% and 21.55%, respectively. The relative content of alcohols in the bio-oil was increased slightly and that of ketones, acids, aldehydes was decreased gradually. However, compared with those without catalyst and Al2(SO4)3 solution, the yield of phenols was increased significantly, indicating that the presence of Al2O3 was beneficial to the production of phenols. The main components of non-condensable pyrolysis bio-gas were CO, CO2, CH4 and H2, among which CO2 had the high volume fraction, accounting for about 63%. The volume fraction of CO was about 32%. The volume fraction of CO2, CH4 and H2 was increased and that of CO was decreased when the porous ceramic balls loading dolomite were used as catalysts. The experimental results would provide a reference for obtaining high value-added chemicals from agricultural biomass. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 26

Main heading: Aluminum oxide

Controlled terms: Alumina? - ?Aluminum sulfate? - ?Biomass? - ?Carbon dioxide? - ?Catalysts? - ?Gas fuel manufacture? - ?Ketones? - ?Phenols? - ?Pyrolysis? - ?Quartz ? - ?Sand? - ?Volume fraction

Uncontrolled terms: Catalytic pyrolysis of biomass? - ?Corn stalk? - ?Dolomite? - ?High mechanical strength? - ?Horizontal tube furnaces? - ?Porous ceramics? - ?Solution concentration? - ?Value-added chemicals

Classification code: 482.2 Minerals? - ?483.1 Soils and Soil Mechanics? - ?522 Gas Fuels? - ?641.1 Thermodynamics? - ?802.2 Chemical Reactions? - ?803 Chemical Agents and Basic Industrial Chemicals? - ?804 Chemical Products Generally

Numerical data indexing: Molar_Concentration 1.00e+03mol/m3, Molar_Concentration 3.00e+02mol/m3, Molar_Concentration 5.00e+02mol/m3, Percentage 1.07e+01%, Percentage 1.53e+01%, Percentage 2.16e+01%, Percentage 2.51e+01%, Percentage 3.20e+01%, Percentage 3.69e+01%, Percentage 6.30e+01%, Time 2.16e+04s

DOI: 10.6041/j.issn.1000-1298.2019.10.036

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

21. Optimization and Test of Performance Parameters of Elastic Air Suction Type Corn Roller Seed-metering Device

Accession number: 20194807752480

Title of translation:

Authors: Shi, Linrong (1); Sun, Bugong (1); Zhao, Wuyun (1); Yang, Xiaoping (1); Xin, Shanglong (1); Wang, Jiuxin (1)

Author affiliation: (1) College of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou; 730070, China

Corresponding author: Zhao, Wuyun(zhaowy@gsau.edu.cn)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 88-95 amd 207

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: In order to improve the performance of air-suction seeder with corn roller, the structure of air-suction disc of air-suction seeder was improved by using elastic rubber according to the characteristics of corn film planting in northwest arid areas. Three factors affecting seed suction ability were obtained by force analysis of suction process of suction cup, which were the rotation rate of suction cup, negative pressure of suction chamber and suction hole diameter of suction pad of seed metering cup. To obtain better performance parameters of elastic suction-nozzle type corn roller seeder, on the self-made experimental platform of elastic suction-nozzle type corn roller seeder, and according to the central composite design experimental design principle of response surface methodology, the rotation rate of suction tray, negative pressure of suction chamber, suction hole diameter of suction pad of seeder were taken as factors, and the qualified rate of plant spacing was main target, taking into account the re-seeding. The response values of seeding rate and seeding failure rate were obtained. The results of bench experiment were fitted by multivariate regression and variance analysis. The two regression models of plant spacing eligibility rate and replaying rate were reliable. The negative pressure of air suction chamber had a significant effect on plant spacing eligibility rate, and the negative pressure of air suction chamber and the diameter of suction pad suction hole of seed metering tray had a significant effect on replaying rate. The results showed that when the rotation rate of the suction tray was 20 r/min, the suction chamber negative pressure was 5 kPa and the suction hole diameter of the suction tray was 4 mm, the qualified index of grain spacing was 95.54%, the miss sowing index was 0.50%, and the replaying index was 3.96%. Under the same conditions, the qualified index of grain spacing was 96.3%, the miss sowing index was 1.3% and the replaying index was 2.4%. The optimization achieved the desired results. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 20

Main heading: Seed

Controlled terms: Failure analysis? - ?Grain (agricultural product)? - ?Nozzle design? - ?Nozzles? - ?Pneumatic materials handling equipment? - ?Regression analysis? - ?Rollers (machine components)

Uncontrolled terms: Central composite designs? - ?Corn? - ?Multivariate regression? - ?Parameters optimization? - ?Performance parameters? - ?Response surface methodology? - ?Seed metering devices? - ?Suction nozzles

Classification code: 408 Structural Design? - ?601.2 Machine Components? - ?632.4 Pneumatic Equipment and Machinery? - ?821.4 Agricultural Products? - ?922.2 Mathematical Statistics

Numerical data indexing: Percentage 1.30e+00%, Percentage 2.40e+00%, Percentage 3.96e+00%, Percentage 5.00e-01%, Percentage 9.55e+01%, Percentage 9.63e+01%, Pressure 5.00e+03Pa, Rotational_Speed 2.00e+01RPM, Size 4.00e-03m

DOI: 10.6041/j.issn.1000-1298.2019.10.010

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

22. Large Eddy Simulation of Vortex Structure and Turbulence Characteristics in Pump Sump

Accession number: 20194807752649

Title of translation:

Authors: Zhang, Desheng (1); Li, Puxi (1); Zhao, Ruijie (1); Pan, Qiang (1); Shi, Weidong (2)

Author affiliation: (1) Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang; 212013, China; (2) School of Mechanical Engineering, Nantong University, Nantong; 226019, China

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 134-141

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: The pump sump is an important part of pump station. Its flow and hydraulic characteristics have an important impact on the performance of the pump. Poor flow patterns are often accompanied by hydraulic phenomena such as vortices. Vortices in the vicinity of pump intakes influence the pump performance with loss of efficiency and vibration. The vortex may appear in the pump sump, and the vortex is generally divided into free surface vortex and submerged vortex. Compared with most Reynolds averaged Navier-Stokes (RANS) based simulations, large eddy simulation (LES) showed a better prediction for all kinds of vortices on location, shape, size of vortex core, velocity, as well as the turbulence kinetic energy inside vortex core. The LES results agreed with PIV results well. Based on the numerical results, time-averaged behavior of three typical vortices showed better similarities with reality that there was always a core region surrounding the axis where the azimuthal velocity stopped increasing and decreased to zero as radius went to zero. Besides, iso-surface of λ2 was adopted to visualize the vortices. The volume of fluid model (VOF) and LES were used to simulate the vortices in the pump sump. The LES model, including the employed mesh was systematically analyzed and the numerical results were compared with the well-known published experiment with respect to the mean velocity and vorticity fields. Particular interests were paid to discover evolution of the free-surface and wall-attached vortices in term of their temporal and spatial characteristics. The anisotropic turbulence structure around the vortices were revealed as well as the momentum transport. The findings provided a deep insight into the application of LES in pump sump and the underlying mechanism of vortex formation and evolution in the sump. ? 2019, Chinese Society of Agricultural Machinery. All right reserved.

Number of references: 22

Main heading: Vortex flow

Controlled terms: Kinetic energy? - ?Kinetics? - ?Large eddy simulation? - ?Navier Stokes equations? - ?Pumps? - ?Sump pumps? - ?Turbulence? - ?Vorticity

Uncontrolled terms: Anisotropic turbulence? - ?Free-surface vortices? - ?Hydraulic characteristic? - ?Reynolds-Averaged Navier-Stokes? - ?Sump? - ?Turbulence characteristics? - ?Turbulence kinetic energy? - ?Volume of fluid model

Classification code: 618.2 Pumps? - ?631 Fluid Flow? - ?631.1 Fluid Flow, General? - ?921 Mathematics? - ?921.2 Calculus

DOI: 10.6041/j.issn.1000-1298.2019.10.015

Compendex references: YES

Database: Compendex

Compilation and indexing terms, Copyright 2019 Elsevier Inc.

Data Provider: Engineering Village

23. Optimal Application Mode of Biochar in Sloping Farmland of Black Soil Area

Accession number: 20194807753620

Title of translation:

Authors: Wei, Yongxia (1, 2); Feng, Chao (1); Shi, Guoxin (1); Wu, Yu (3, 4); Liu, Hui (2, 5)

Author affiliation: (1) School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) Key Laboratory of High Efficiency Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural Affairs, Northeast Agricultural University, Harbin; 150030, China; (3) Heilongjiang Agricultural Reclamation Survey and Research Institute, Harbin; 150090, China; (4) College of Forestry, Northeast Forestry University, Harbin; 150040, China; (5) School of Science, Northeast Agricultural University, Harbin; 150030, China

Corresponding author: Liu, Hui(xiaolaida@163.com)

Source title: Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery

Abbreviated source title: Nongye Jixie Xuebao

Volume: 50

Issue: 10

Issue date: October 25, 2019

Publication year: 2019

Pages: 269-277

Language: Chinese

ISSN: 10001298

CODEN: NUYCA3

Document type: Journal article (JA)

Publisher: Chinese Society of Agricultural Machinery

Abstract: Aiming to explore the application effect and comprehensive effects of adding biochar for many years in the black soil region of Northeast China, find the best carbon application amount and application period, and provide scientific theoretical guidance for the efficient use of black soil resources and the sustainable development of water resources. In 2015, the research on the best application mode of biochar was carried out at Hongxing Farm in Bei’an City, Heilongjiang Province. Five treatments, including Y0 (0 t/hm2), Y25 (25 t/hm2), Y50 (50 t/hm2), Y75 (75 t/hm2) and Y100 (100 t/hm2) were