郭文川,朱新华,郭康权,王转卫.桃的电特性及新鲜度识别[J].农业机械学报,2007,38(1):112-115.
.[J].Transactions of the Chinese Society for Agricultural Machinery,2007,38(1):112-115.
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桃的电特性及新鲜度识别   [下载全文]
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DOI:10.3969/j.issn.1000-1298.[year].[issue].[sequence]
中文关键词:    电特性  生理特性  新鲜度  BP神经网络
基金项目:
郭文川  朱新华  郭康权  王转卫
西北农林科技大学
中文摘要:为了解采后果品电特性变化机理,并探索基于电特性识别果品品质的方法,研究了桃采后电特性和生理特性的变化。结果表明,随着桃新鲜度下降,相对介电常数呈余弦规律变化,损耗角正切逐渐减小,呼吸高峰时相对介电常数最大。分析了电特性变化的原因,进而建立了采后桃电特性与生理特性之间的关系模型。以相对介电常数和损耗角正切为输入特征参数,应用BP神经网络技术识别桃的新鲜度等级,平均识别率为
Key Words:
Abstract:82%。 Electrical and physiological properties of peaches were investigated in order to understand electrical properties of post-harvest fruits and to explore new quality sensing methods based on electrical properties. It was observed that the relative dielectric constant varied with cosine law roughly and loss tangent decreases as peaches’ aging. The maximum relative dielectric constant appeared at peak of respiration. The reasons why electrical parameters change were analyzed. Furthermore, BP neural network technology was used to identify freshness of peaches when relative dielectric constant and loss tangent were selected as input characteristic parameters. Results showed the average distinguishing rate was 82%.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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