搜索结果: 1-15 共查到“农业电气化与自动化 analysis”相关记录23条 . 查询时间(0.33 秒)
Multivariate statistical methods as a tool of financial analysis of farm businesses
financial analysis financial ratios multivariate statistical methods correlation analysis discriminant analysis cluster analysis
2014/3/26
The paper is focused on the evaluation of the possibilities of analysing the relations between economic and financial indicators of farm businesses by the application of multivariate statistical metho...
高精度气动比例压力阀设计与特性分析（Design and Characteristics Analysis of a High Precision Pneumatic Proportional Pressure Valve）
气动比例压力阀 动态模型 压力控制
2009/11/3
设计了一种两级阀芯活塞式结构的以比例电磁铁为控制元件，采用电反馈闭环控制的高精度气动比例压力阀。该阀输出压力在0.6 MPa内连续可调，且稳态精度可达0.25 kPa。建立了比例阀完整的非线性动态模型，分析了主要物理和几何参数对系统动态特性和控制性能的影响；构建了输出因子调整的模糊自适应比例加积分控制器，并利用ATmega16单片机实现了压力在设定范围内的快速高精度控制。实验结果表明，该阀在设计压...
基于傅里叶红外光谱重组技术的食用油检测改进研究（Improved Application of FTIR Spectral Reconstitution Technique in Edible Oils Analysis）
食用油 傅里叶红外光谱 光谱重组技术
2009/11/3
以食用油、无色矿物精油(OMS)、六羰基铬为试验材料，利用二维相关振动光谱技术对FTIR光谱重组（SR）检测中OMS特征吸收峰取代光谱标记物进行评价研究。结果表明在单一菜籽油体系中，有9个相关吸收峰可用于TVF预测定量分析。考虑不同因素影响，相关吸收峰减至4个。最优相关吸收峰测定OMS体积分数相关性好于标记物特征吸收峰，受混合样品极性变化影响较少。在食用油和OMS混合物中既可用光谱标记物也可用OM...
基于激光诱导荧光光谱分析的黄瓜叶片叶绿素含量检测（Detecting of Chlorophyll Content of Cucumber Leaves Based on Laser-induced Fluorescence Spectrum Analysis Technique）
叶绿素含量 激光 叶绿素荧光
2009/11/3
0.93，p0.93, p<0.001) in this excitation light source condition. This research doesn’t only extend the scope of the application of chlorophyll fluorescence detection technology, but also provides a the...
基于NIRS的反刍动物饲料中肉骨粉判别（Discriminant Analysis of Meat and Bone Meal Content in Ruminant Feed Based on NIRS）
反刍动物饲料 肉骨粉 近红外反射光谱
2009/8/11
收集国内常用的、具有代表性的精料补充料和肉骨粉，制备定标集样品235个，外部验证集样品152个。在400～2498nm波长范围内进行近红外光谱扫描，选择合适的光谱预处理方法和光谱范围，采用SIMCA方法和DPLS方法分别建立判别分析模型。建立的SIMCA判别分析模型对外部验证集的正确判断率为96.1%，建立的DPLS判别分析模型对外部验证集的正确判断率为100%。与NIRS定量分析精料补充料中MB...
建立了芯铧式开沟器和播种施肥开沟器与土壤颗粒的二维离散元法分析模型，采用离散元法研究开沟器的工作过程及工作阻力，通过改变开沟器的CAD模型和土壤颗粒参数，分析不同条件下开沟器的工作阻力。在室内土槽进行了2种开沟器的工作阻力测试，并将测试结果与开沟器工作阻力的离散元法计算结果进行了比较，两者的变化趋势基本一致，相对误差在10%～20%之间，由此初步证明了采用离散元法分析开沟器工作过程和工作阻力的可行...
连续流粮食干燥控制系统变量分析与结构设计（Variable Analysis and Structural Design on Automatic Control System of Continuous Flow Grain Drying）
粮食 干燥 多变量控制系统
2009/8/11
针对粮食干燥影响因素多且不确定，以及测量结果存在滞后的问题，提出了连续流粮食干燥被控变量和控制变量的选择方法，通过实验数据对影响粮食干燥过程的各因素及各因素对粮食出口含水率的灵敏度进行了分析。结果表明，影响较大的因素有排粮电动机转速、热风温度、粮食初始含水率，影响较小的因素有环境温度、热风和冷却风风量、粮食初始温度。设计了连续流粮食干燥过程自动控制系统的控制结构，引入微分环节可有效抑制因测量而造成...
牡丹籽油超声波辅助提取工艺的响应面法优化（Optimization on Ultrasonic-assisted Extraction Technology of Oil from Paeonia suffruticosa Andr. Seeds with Response Surface Analysis）
牡丹籽油 超声波辅助提取 响应面分析
2009/8/11
为优化牡丹籽油的超声波辅助提取工艺，在单因素试验基础上，选择液料比、超声波功率、处理时间、处理温度为自变量，牡丹籽油得率为响应值，采用Box-Behnken试验设计方法，研究各自变量及其交互作用对牡丹籽油得率的影响。利用Design Expert软件得到回归方程的预测模型并进行响应面分析，确定超声波辅助提取牡丹籽油的最佳条件为：液料比11mL/g，超声波功率300W，处理时间60min，处理温度5...
Technical analysis of a back supply of heated rendering-plant fat the disc drier
Act on Integrated Prevention best available techniques (BAT) veterinary decontamination institutes (VAú) meat and bone paste meat and bone meal (MKM) rendering-plant fat continuous disc drier
2014/2/28
The fulfilment of the subject of the Act No. 76/2002 Dig. on integrated prevention reduces energy consumption and increases hygienic safety of a thermal treatment of animal tissues at veterinary decon...
SWOT analysis of Slovak farmers in the pre-accession period to the EU
swot analysis, restructuring individual farm transactional costs incomes households
2014/3/29
In the framework of Slovakia entering into the European Union, there was done a PHARE-ACE survey in years 1999–2000. The name of this survey was “Micro-economic analysis of farming households restruct...
Analysis of a long-term development of some selected parameters of Czech agriculture
agriculture transformation of centrally planned economy analysis of overall parameters development
2014/3/29
The paper presents some partial data obtained in studies on basic indicators of the development of Czech agriculture within the time interval of 1980–2001. The statistical analysis, carried out within...
Qualitative analysis of the European Union members positions under the Common Agricultural Policy reform
Common Agricultural Policy CAP CAP Reform EU members positions
2014/3/29
The Common Agricultural Policy (CAP) reform in 2003 represents the entry into the third phase of the CAP. The final shape of the reform packet is a result of a compromise between external and internal...
The analysis of proposals of the Common Agricultural Policy reform and its impacts for the EU
arable crops decoupling impacts modulation Mid-Term Review payments
2014/3/29
The Common Agricultural Policy (CAP) is of the character of a highly protective policy of the EU Member States. It includes a number of measures distorting the market directly and influences the farme...
Micro-economic analysis of firms differentiation
differentiation microeconomic analysis enterprise profitability profit
2014/3/29
After liberalisation established new relations in Slovak economy, it seemed that problems of agricultural companies differentiation would disappear. But the economic results of our companies confirm t...
Policy analysis for globalized agriculture
micro-level analysis farm household Agricultural Resource Management Survey (ARMS), USA
2014/3/29
Farms, farmers, farm families, and even farm policies have changed in the United States and Europe over the decades since World War II. Now it is time to bring the methods of farm policy analysis and ...