(拉丝)牵伸比;
According to the field observation and model test data of ground water drawdown speed and the ratio of drainage water quantity and evaporation, by using the theory of ground water seepage, a new method for determining the field drain spacing is advanced.
本文根据地下水蒸发试验资料,利用地下水动力学理论,提出了考虑蒸发影响下按地下水位下降速度标准进行田间排水沟(管)间距的计算方法。
Study on Self-Adaptive Neural Network Identifying of Void on Rigid Pavement Based on Frequency Drawdown Ratio
基于频率下降率的刚性路面脱空自适应神经网络识别研究
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