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Losses of soluble forms of organic carbon in relation to different agro-technical treatment of meadows
dissolved organic carbon meadow experiment mineral soil total organic carbon
2016/8/2
Studies were performed to determine the loss of soluble forms of organic carbon in differently used meadows on mineral soil. In a long-term experiment two variants were distinguished: a productive mea...
阵列式压电晶体传感器谷粒清选损失监测仪设计（Design of Intelligent Grain Cleaning Losses Monitor Based on Array Piezocrystals）
联合收获机 清选损失 在线监测 压电晶体阵列
2010/12/28
设计了由阵列式压电晶体传感器、阵列信号调理系统及单片机监测系统组成的谷粒清选损失监测仪，并制作了仪器样机。测试试验结果表明，阵列式压电晶体谷粒清选损失监测仪对损失谷粒响应时间在1 s以内，测量误差小于5%，且对实际收获工况中各种干扰能有效地抑制。
水泵转速变化对进出水流道水力损失的影响（Influence of Rotational Speed of Pumps on Hydraulic Losses in Suction Boxes and Discharge Passages）
水泵 转速 水力损失 进出水流道
2009/8/11
在比较各种进出水流道水力损失研究方法的基础上，运用计算流体动力学方法数值模拟了4种水泵装置内部流动，研究水泵转速变化对进出水流道水力损失的影响。数值计算结果表明，由于水泵装置中进水流道内部流动受水泵叶轮旋转引起的水流预旋的影响，因而小于无泵单独运行时的水力损失。水泵转速变化后，在相同流量下，进水流道的水力损失基本不变。水泵导叶出口水流条件和剩余环量影响出水流道的水力特性，水力损失随流量变化的关系非...
Development of a Mathematical Model Using Dimensional Analysis for Predicting the Friction Losses in Drip Irrigation Laterals with Cylindrical Type In-Line Emitters
Drip irrigation emitters friction loss mathematical model dimensional analysis
2009/1/13
This paper presents a prediction model developed using dimensional analysis for friction losses in drip irrigation laterals. Drip irrigation laterals with cylindrical type in-line emitters placed at d...