The variation at the lower solar elevation is caused by the cosine response of the instrument.
而太阳高度角较低时此值的变化，主要由仪器的余弦响应所引起。
This analysis method considers different shear forces in different directions on the joint surface, the variation of joint with its position, elevation and load fluctuation, an...
所提出的分析方案能够考虑接缝面上不同方向的抗剪能力，考虑缝隙随接缝位置、高程和荷载施加而变化的情况以及不同接缝间的相互影响。
It describes several actual experiments in-situ of pumping water from Wells, indicating the relation between the variation of elevation and the pumping, with respect to time and location.
文中应用了几个抽水试验实例，说明了它们在时间上、空间上的相互变化关系。
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