搜索结果: 1-5 共查到“农业机械化 A comparison”相关记录5条 . 查询时间(0.094 秒)
Comparison of oil press for jatropha oil – a review
ram press strainer press cylinder-hole press
2015/5/18
As petrol will soon be exhausted in the near future, Jatropha is going to be one of the substitute candidates for future biodiesel production. Countries of South-East Asia, such as Malaysia, they are ...
盘式吸渗仪吸渗率计算方法比较（Comparison among Permeability Methods of Disc Infiltrometer）
吸渗率 盘式吸渗仪 计算方法
2009/9/25
选用盘径为5cm和15cm的盘式吸渗仪，对杨凌塿土（粘土）和神木砂黄土（砂壤土）两种质地的土壤在0、－3、－6、－9、－12cm 水头5种负压下进行了室内吸渗实验，分析了不同盘径和负压对累积吸渗量的影响；并选用4种吸渗率公式对这两种质地土壤吸渗率进行了计算，以Vandervaere法为参考方法对该4种方法的适用性进行了分析。结果表明，在相同的时间内，两种土壤5 cm盘径下的累积吸渗量均大于15 c...
温度对柴油和二甲醚喷射系统性能的影响（Comparison of Diesel and DME Injection System Performances at Different Temperatures）
喷射系统 温度 柴油 二甲醚
2009/8/11
针对普通油泵—油管—油嘴燃油系统，建立了喷射系统的数学模型。对不同温度下柴油和二甲醚喷射系统性能进行了数值模拟。研究表明：在相同温度下，二甲醚喷嘴压力的上升和下降速率、压力峰值都比柴油低，20℃时二甲醚较柴油下降51.1%，50℃时较柴油下降45.2%，喷射速度和累积喷油量均远低于柴油，针阀开启时刻较柴油明显延后；在最大速度点，20℃和50℃时二甲醚分别较柴油下降38.8%和36.8%。随着温度的...
An Evaluation of Alternative Cotton Harvesting Methods in Northeast Louisiana - A Comparison of the Brush Stripper and Spindle Harvester
Evaluation Cotton Harvesting Methods Northeast Louisiana Comparison Brush Stripper Spindle Harvester
2008/12/15
In response to increases in cotton production costs, producers are seeking ways to reduce input expenses. Because brush strippers are less expensive to operate than spindle harvesters, research was pe...
Comparison of the operation of milking machine control valves and a newly designed regulating device
milking machine vacuum control control valve vacuum stability
2014/2/28
One of the basic demands for milking machines is to maintain a constant vacuum level if air consumption by milking machine is changed. The author designed a device with reducing valve for vacuum level...