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Analysis of Aromatic Components in Fruit of Apricot Cultivar Jinkaite in Different Development Periods

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Agricultural Biotechnology 2017年第1期6卷 11-14页

作者： xiaomin xue xueping HAN Jinzheng WANG Shandong Institute of Pomology Taian 271000China

The aromatic components and contents in fruit of apricot cultivar Jinkaite were analyzed in green ripe period, commercial ripe period and full ripe period by static headspace and gas chromatography-mass spectrometry. The results showed that total 46 kinds of aromatic components were detected in Jinkaite apricot fruit. The main aromatic components included esters, alcohols, hydrocarbons and aldehydes. The aromatic components and contents had significant differences be- tween various fruit developmental periods. Specifically, 31,32 and 24 kinds of aromatic components were detected in green ripe period, commercial ripe period and full ripe period, respectively. The contents of esters were the highest at the 3 developmental stages with the percentages of 61.14%, 70. 02% and 61.48%, respec- tively. Hexyl acetate, ethyl hexanoate, hexyl 2-methyl propionate and 1-hexanol were characteristic aromatic components in fruit of apricot Jinkaite, and their aroma values in full ripe period were 448.50, 29.86, 7.85 and 3.54, respectively.

关键词： Apricot Fruit development Aromatic component GC-MS

Effects of Different Times of Bagging on Fruit Quality and Disease and Pest Incidence of Fuji Apple

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Asian Agricultural Research 2018年第12期10卷 67-69页

作者： Guiping WANG xiaomin xue Ru CHEN Jinzheng WANG Shandong Institute of Pomology Tai an 271000China

The effects of bagging at different times in Mengyin area on the fruit quality and disease and pest incidence of Huimin short-cut Fuji apple were investigated,with unbagged fruit as the control. The results showed that among the apples bagged on May 5,May 15,May 25,June 2 and June 12,the single fruit weight and fruit shape index of the apples bagged on June 2 were highest,308. 1 g and 0. 868,respectively; the peeled harness of the apples bagged during May 5-25 was higher than that of the control; the peeled harness of the apples bagged on June 2 and June 12 was lower than that of the control; the soluble solids content of bagged fruit was lower than that of unbagged ones,and no significant differences were found among different treatments; the coloring index of the apples bagged on June 2 was up to 100%; the smooth finish index of the apples bagged on May 5 reached 96. 67%,the highest; the red chromatic value( a*) of bagged fruit was higher than that of unbagged ones,and there were no significant differences among different bagging treatments. The earlier the bagging was,the higher the incidence of black spot and bitter pit was. The incidence of black spot and bitter pit in bagged fruit was higher than that in unbagged ones. In conclusion,in Mengyin area of Shandong Province,bagging is better to be carried out on June 2,45 d after the full bloom.

关键词： Apple Bagging time Quality Diseases and pests

Effects of Different Water and Fertilizer Combinations on Tree Structure,Leaf Parameters and Photosynthesis of Apple Saplings

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Agricultural Biotechnology 2014年第6期3卷 4-7,13页

作者： Ru CHEN Jinzheng WANG xiaomin xue Peixian NIE Guiping WANG Shandong Institute of Pomology

[ Objective] This study aimed to investigate the effects of different water and fertilizer combinations on apple saplings. [ Method] ＇ Tianhong 2＇ Fuji /SH40/Malus robusta Rehd. was used as the experimental material to analyze the effects of different irrigation modes and combinations of basal fertilizer and dressing fertilizer on tree structure, leaf parameters and photosynthesis of apple saplings. [ Result] The results showed that different water and fertilizer combinations ex- hibited varying effects on tree structure, leaf parameters and photosynthesis of apple saplings. To be specific, applying 432 000 kg/hm2 basal fertilizer, 480 kg/hm2 urea and 915 kg/hmz organic fertilizer ＋ 0 ＋ 915 kg/hm2 organic fertilizer as dressing fertilizer, and 1% urea as leaf fertilizer was conducive to promoting growth of branches and leaves, increasing leaf thickness, individual leaf area and SPAD, and improving photosynthesis of apple saplings under half root irrigation and whole root irrigation conditions. In addition, the effects were more significant under whole root irrigation conditions. [ Conclusion] Selecting the appropriate water and fertilizer combination is conducive to the growth of apple saplings.

关键词： Water and fertilizer Apple saplings Tree structure Leaf parameters Photosynthesis

Effects of Different Irrigation Methods on Growth,Fruit Quality and Yield of Apple Trees

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Asian Agricultural Research 2018年第7期10卷 54-57,68页

作者： Ru CHEN Yongye HUANG Xinglu JI Yuehua XU xiaomin xue Jinzheng WANG Shandong Institute of Pomology Tai'an 271000China Penglai Fruit Trees Work Station Penglai 265600China

Water-saving irrigation is an important way to realize the sustainable development of the apple *** order to screen the best irrigation pattern for apple,taking 9-year-old‘Yanfu 10'Fuji/Malus robusta apple as the material,the effects of different irrigation methods(drip irrigation,sprinkling irrigation,and flood irrigation) on the growth,fruit quality,and yield of apple trees were *** results showed that compared with the flood irrigation,drip irrigation and sprinkling irrigation significantly increased the spring shoot length by 14.8%and 9.1%,respectively,and decreased the autumn shoot length by 11.7% and 8.8%,*** irrigation and sprinkling irrigation significantly increased the leaf area,chlorophyll content,and leaf weight,the leaf area increased by 3.0% and 1.9%,respectively,the chlorophyll content increased by 13.9% and 11.5%,respectively,and the leaf weight increased by 5.8% and 5.1%,*** irrigation and sprinkling irrigation could slightly increase the single fruit weight and fruit shape index,significantly increase the coloring index and smoothness *** single fruit weight increased by 3.2% and 1.9%,the coloring index increased by 6.1% and 4.1%,the smoothness index increased by 4.7% and 2.8%,and the proportion of red fruit increased by 4.2% and 2.2%,*** content of soluble solids in drip irrigation and sprinkling irrigation was significantly higher than that in flood irrigation,which was 13.0% and 2.6% higher than CK,*** fruit hardness in drip irrigation and sprinkling irrigation was 7.9% and 2.2% higher than CK,respectively,and that in drip irrigation increased *** yield in drip irrigation and sprinkling irrigation was 12.1% and 8.2% higher than CK,*** conclusion,drip irrigation and sprinkling irrigation could promote the growth of apple trees,improve the fruit quality,and increase the yield of apple trees,and the effect of drip irrigation is better than sprinkli

关键词：节水灌溉苹果可持续发展农业

Effects of Different Density-reducing Methods on Canopy Microenvironment, Tree Growth and Fruit Quality in Closed Apple Orchard

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Agricultural Biotechnology 2019年第6期8卷 119-123页

作者： Ru CHEN xiaomin xue Laiping WANG Hao ZHAI Peixian NIE Jinzheng WANG Shandong Institute of Pomology

In order to optimize and transform closed mature apple orchards with standard rootstocks and improve the quality of fruit,taking a closed Red Fuji apple orchard as the test object,the effects of different density-reducing methods(deinterlacing,removing every other plant in each row,removing every other plant every other row)on the canopy microenvironment,tree structure,leaf photosynthesis and fruit quality were *** results showed that different density-reducing methods significantly reduced the orchard coverage and increased the crown *** them,the deinterlacing treatment was the best in improving the population structure of the closed orchard,as it reduced the orchard coverage rate by 55.68 percentage points and the canopy transmittance by 82.38 percentage points,compared with the control(CK).Different density-reducing methods all could significantly reduce the branch amount in the closed orchard and optimized the branch *** three density-reducing methods decreased the number of branches per plant by 18.96%,12.41%and 19.58%,respectively,compared with the *** compared with the CK,the proportion of short branches and leafy branches to the total branches was increased by 17.13%,14.27%and 7.37%,respectively,and the proportion of long branches and developmental branches to the total branches was decreased by 24.47%,18.04%and 10.79%,*** effects of the different density-reducing methods on the temperature,relative light intensity,SPAD and leaf photosynthetic rate in canopies all followed an order of deinterlacing>removing every other plant in each row>removing every other plant every other row>CK,while those on the relative humidity showed an order of deinterlacing>removing every other plant in each row>removing every other plant every other row>CK,while those on the relative humidity showed an order of deinterlacing

关键词： Apple Closed orchard Density reduction method Canopy microenvironment Tree growth Fruit quality

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高灵敏度离子皮肤手指关节角度传感器的设计

西安交通大学学报 2021年第3期55卷 164-174页

作者：倪娜薛晓敏张陵王垠西安建筑科技大学理学院西安710055 西安交通大学土木工程系西安710049 西安交通大学航天航空学院西安710049 西安理工大学工程力学系西安710048

为解决柔性传感器监测手指关节运动时灵敏度、测量范围及阈值有限的问题,设计并制备了一种多介电层(3层)结构形式的离子皮肤手指关节角度传感器。该传感器由多个硅橡胶薄膜和高保水性的离子凝胶电极构成,当穿戴传感器的手指关节弯曲时,... 详细信息

为解决柔性传感器监测手指关节运动时灵敏度、测量范围及阈值有限的问题,设计并制备了一种多介电层(3层)结构形式的离子皮肤手指关节角度传感器。该传感器由多个硅橡胶薄膜和高保水性的离子凝胶电极构成,当穿戴传感器的手指关节弯曲时,根据应变引起其电容信号的变化,可测得手指关节弯曲角度。构建多介电层结构形式的离子皮肤应变传感理论模型;推导多介电层离子皮肤手指关节角度传感器的角度传感理论模型;测试传感器输出与手指关节角度关系。实验结果表明,传感器角度传感理论模型与测试结果吻合较好;传感器灵敏度为单介电层离子皮肤手指关节角度传感器的3.5倍,测量范围囊括手指关节从展平到完全弯曲状态角度,阈值小于1°,具有灵敏度高、测量范围广和阈值低的特性。离子皮肤多介电层的结构形式及理论模型对康复训练患者及微操纵机械手的精准测量具有较好应用前景。

关键词：康复训练指关节运动柔性传感器离子皮肤关节角度

复合压电水平悬臂梁振动俘能特性试验及机电耦合模型研究

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振动与冲击 2022年第24期41卷 167-175页

作者：薛晓敏马强力王佳佳西安交通大学人居环境与建筑工程学院西安710049

压电悬臂梁具有较好的振动俘能特性,然而其复杂力电特性及模型相关研究的不充分性导致实际应用受到制约。鉴于此,开展复合压电水平悬臂梁振动俘能特性试验及模型研究:首先,基于电路和结构基础设计搭建压电悬臂梁振动能量转换电能的试验... 详细信息

压电悬臂梁具有较好的振动俘能特性,然而其复杂力电特性及模型相关研究的不充分性导致实际应用受到制约。鉴于此,开展复合压电水平悬臂梁振动俘能特性试验及模型研究:首先,基于电路和结构基础设计搭建压电悬臂梁振动能量转换电能的试验系统,试验结果显示,压电悬臂梁俘能系统能量转换能力受外部激励频率、内部电路负载以及结构设计配重等条件的影响,其机电转换特性复杂,电压/电流-应变关系曲线呈近似椭圆形,功率-应变关系曲线呈近似蝴蝶形,还观测到由于结构自身及其配重的重力效应导致特性曲线形状呈现偏置现象;然后,提出力电耦合数学模型用于复合压电水平悬臂梁系统俘能的力电特性描述,通过与试验数据比较,验证该模型不但可以精确预测振动回收的电能(功率),还可有效模拟电压/电流-应变和功率-应变的复杂力电特性,且对试验特性曲线存在的偏置现象也能较好的模拟。试验和模型研究成果将对压电悬臂俘能系统在工程领域的进一步应用提供必要的理论基础。

关键词：振动能量收集复合压电悬臂水平梁力电耦合建模重力效应特性曲线偏置

磁流变阻尼器滞回模型参数的敏感性分析及其简化模型

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西安交通大学学报 2013年第7期47卷 102-107页

作者：薛晓敏孙清伍晓红张陵西安交通大学土木工程系西安710049 西安交通大学航天航空学院西安710049

为解决Bouc-Wen模型参数多、数学表达式复杂、参数识别困难的问题,根据Bouc-Wen模型中参数的物理意义及其对结果输出贡献的大小进行了参数敏感性分析,滤除敏感性差的参数,令敏感性强的参数参与拟合滞回曲线,从而获得了简化的Bouc-Wen模... 详细信息

为解决Bouc-Wen模型参数多、数学表达式复杂、参数识别困难的问题,根据Bouc-Wen模型中参数的物理意义及其对结果输出贡献的大小进行了参数敏感性分析,滤除敏感性差的参数,令敏感性强的参数参与拟合滞回曲线,从而获得了简化的Bouc-Wen模型。在参数敏感性分析中,提出并采用了修正的one-at-a-time(OAAT)法。修正OAAT法是在OAAT法的基础上,令待测参数之外的其他参数自由变化,充分考虑了参数之间的耦合关系,具有全局敏感性分析的意义,可使结果更为准确和全面。为了验证Bouc-Wen简化模型的有效性,采用遗传算法对Bouc-Wen模型和Bouc-Wen简化模型的参数进行了识别,并对磁流变阻尼器力学特性试验数据进行了数值模拟,结果表明:Bouc-Wen简化模型能够更精确、更高效地模拟滞回曲线,拟合精度平均提高了4%,计算效率平均提高了47%。

关键词： Bouc-Wen模型振动控制参数识别敏感性分析

利用遗传算法的磁流变阻尼器结构含时滞半主动控制

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西安交通大学学报 2010年第9期44卷 122-127页

作者：薛晓敏孙清张陵伍晓红西安交通大学航天航空学院西安710049 西安交通大学土木工程系西安710049

为解决磁流变阻尼器控制系统中普遍存在的时滞问题,提出一种基于遗传算法的磁流变阻尼器结构含时滞半主动控制策略.该策略以含时滞微分动力学方程为依据,采用先进的并行算法对结构控制力进行优化,然后将结果代入磁流变阻尼器的电流与阻... 详细信息

为解决磁流变阻尼器控制系统中普遍存在的时滞问题,提出一种基于遗传算法的磁流变阻尼器结构含时滞半主动控制策略.该策略以含时滞微分动力学方程为依据,采用先进的并行算法对结构控制力进行优化,然后将结果代入磁流变阻尼器的电流与阻尼力关系式中优化出相应的电流,最终将该电流施加给振动系统从而获得理想的控制效果.为了验证该策略的有效性,选用一个在底部安有磁流变阻尼器的3层平面框架为控制对象,通过该策略的优化过程得出了一系列仿真结果,证明该半主动控制策略控制效果明显.

关键词：结构振动控制磁流变阻尼器时滞遗传算法多目标控制