搜索结果: 1-15 共查到“农业工程 yield”相关记录18条 . 查询时间(0.14 秒)
Yield and fuel characteristics of willows tested for biomass production on agricultural soil
short rotation coppice emissions native willow
2016/12/9
Short rotation coppice (SRC) plantations of fast growing trees in Czech Republic may be grown on approximately 120,000 ha in future, as indicated in the Czech Action Plan for Biomass. Until now, 2,800...
Mass yield of biochar from hydrothermal carbonization of sucrose
HTC wet torrefaction reaction time mixing process liquid
2016/12/9
In this article, the effect of increasing dry matter content and reaction time of hydrothermal carbonization on mass yield of biochar was studied. Carbonization took place in batch experiments in a pr...
Pyrolysis of sandbox (Hura crepitans) shell:Effect of pyrolysis parameters on biochar yield
residue thermal reactor model factorial
2015/12/30
Pyrolysis of sandbox shell was carried out with the aim of investigating the effect of pyrolysis parameters on the pyrolysis process and identifies production conditions for the yield of biochar. Para...
基于分形理论的水稻单产计算机视觉预测技术（Per-square-meter Yield Estimation of Paddy Based on Fractal Analysis）
水稻 单产 预测 计算机视觉 分形
2010/12/29
以武育粳3号为试验品种，用自制计算机视觉系统，拍摄成熟期水稻群体图像，应用分形理论分析水稻群体图像的分形特征，在此基础上提取了图像的差分计盒维数和多重分形曲线；并进一步分析得出水稻单位面积产量与水稻图像分形维数具有线性相关关系，最后建立水稻单位面积产量模型，模型精度为92.57%。
微咸水连续灌溉对冬小麦产量和土壤理化性质的影响（Effect of Saline Water Continuous Irrigation on Winter Wheat Yield and Soil Physicochemical Property）
微咸水 冬小麦 土壤含盐量 电导率
2010/12/28
为了合理开发和利用黄淮海平原浅层地下微咸水，2003~2005年在中科院河北南皮生态实验站连续以3g/L的微咸水对冬小麦进行田间灌溉试验，分析了微咸水灌溉对土壤含盐量、土壤溶液盐分含量、电导率以及冬小麦产量的长期影响，为建立华北地区冬小麦微咸水灌溉的合理灌溉制度和微咸水的合理利用提供理论依据。结果表明，连续利用3g/L的微咸水灌溉，会造成土壤表层盐分的累积，尤其在降水量偏少的年度会使作物受到盐...
小麦多年产量空间变异与空间关联分析（Spatial Autocorrelation Analysis of Wheat Yield over Five Years）
小麦产量 空间相关性 自相关
2010/12/28
利用全局空间统计方法Moran’s I和局部空间统计方法LISA研究了小汤山国家精准农业基地2001~2006年小麦产量及两种气候模式下产量的空间变异和空间关联。研究结果表明，不同年份产量及气候模式下均存在极显著的空间自相关；全局和局部空间自相关分析表明，试验地块的东北部、西部和南部区域存在极显著的空间自相关，但东北部和西部区域在不同的气候模式下产量变化幅度较大，而南部区域产量趋于稳定。
Mapping spatial variability of soil properties and yield by using geostatic method
precision agriculture geostatistics maps spatial variability
2014/2/26
The Czech University of Agriculture in Prague (CUA) Farm at L醤y started with precision farming technology several years ago. In the first step the yield and nutrients content were monitored. For prec...
冲击式谷物流量传感器设计与性能试验（Development of Grain Flow Sensor for Yield Monitor System）
精细农业 测产系统 流量传感器 感力板 田间试验
2009/11/3
作物产量空间变异信息是实施精细农业的基础，为了获取产量信息，开发了一款新型冲击式谷物流量传感器。传感器由机械部分和电路部分组成，机械部分主要由感力板、敏感梁、底座以及传感器外壳等组成，敏感梁的上下表面贴有应变片。感力板受到谷物的冲击，从而带动敏感梁发生形变，通过应变片组成的桥式测量电路输出电信号。传感器的输出信号为电压形式。在静态试验和室内动态试验的基础上分别在河北省保定市和黑龙江省佳木斯市进行了...
G). The total number, the total perimeter and total area of citrus were computed from the segmented image. The relationship between each image parameter and citrus yield was analysis. The result of ex...
联合收获机粮食产量分布信息获取技术（Yield Distribution Information Measurement for Grain Combine Harvester）
精细农业 粮食产量 分布信息 全球定位系统
2009/11/3
针对精准农业田间信息获取技术的研究，提出了一种基于称重法的联合收获机粮食产量分布信息测量方法，可以提高联合收获机粮食流量监视的准确性。利用传统联合收获机的粮食传输特点，采用螺旋输送称重式原理组成联合收获机产量流量传感计量，解决了计量系统与动力直接传输相结合的技术问题，借助于GPS定位信息实现了联合收获机粮食流量动态计量以及田间粮食产量分布信息的测量。
谷粒冲击压电力敏元件数值模拟与试验（Numerical Simulation and Test of Grain Impact Piezoelectric Yield Sensor谷粒冲击压电力敏元件数值模拟与试验Numerical Simulation and Test of Grain Impact Piezoelectric Yield Sensor）
谷粒 冲量式测产传感器 数值模拟
2009/8/11
设计了一种冲量式谷物质量流量压电传感器。应用显式动力学软件LS—DYNA建立了谷粒—力敏元件冲击有限单元模型，数值模拟了谷粒冲击力敏元件的过程，研究了力敏元件材料对冲击过程的影响。应用LabView软件和高性能压电陶瓷，开发了谷粒冲击力敏元件的物理样机试验系统，对数值模拟结果进行了检验。数值模拟和试验研究的结果表明：在1Cr18Ni9、聚丙烯和陶瓷(Si3N4)3种力敏材料中，陶瓷(Si3N4)是...
挤压膨化后纤维降解对大豆水酶法提油率的影响（Effect of Cellulose Degradation on Soybean Oil Extraction Yield through Extrusion and Expansion Processing）
挤压 膨化 提油率 水酶法 纤维降解 响应面分析
2010/2/26
在单因素试验和挤压膨化机稳定工作基础上，采用响应曲面设计研究了挤压膨化工艺参数对水酶法提取大豆油脂得率与纤维降解率的影响。利用SAS软件建立了数学模型，并对各因素及交互作用进行了分析。结果表明：当模孔孔径为20mm、物料含水率为14.5%、螺杆转速为105r/min、套筒温度为90℃时，总油提取率最优值为93.02%±0.29%。当模孔孔径为18mm、物料含水率为15%、螺杆转速为100r/min...
Effect of Irrigation Water on Corn Grain Yield in Ankara Conditions
Irrigation Water Corn Grain Yield Ankara Conditions
2009/1/23
This research was conducted in Ankara conditions in order to determine corn yield response to water. When 50% of available water content in root zone is consumed in the control treatment, irrigation ...
The Effects of Irrigation Water Salinity and Irrigation Water Amounts on Yield and Total Mineral Residues of Broccoli（Brassica oleracea botrytis）
Irrigation Water Salinity Irrigation Water Amounts Yield Total Mineral Residues of Broccoli（Brassica oleracea botrytis）
2009/1/14
In this greenhouse study, the effects of irrigation water salinity in relation with the amounts of irrigation water on broccoli yields and mineral contents were investigated. For this purpose, five s...
Water-Use Efficiency（WUE）and Change in the Yield-Response Factor（Ky）of Cotton Irrigated by an Irrigation Drip System
Water-Use Efficiency (WUE) Yield-Response Factor（Ky）of Cotton
2009/1/14
This study was conducted to investigate the effect of water-use efficiency and changes in the yield-response factor of cotton irrigated with an irrigation drip system. The amount of water applied was ...