提出一种基于波前径向斜率测量原理的适用于测量大口径成像光学系统像差的自基准新方法。
Based on the radial slope testing of wavefront, a novel self referenced wave aberration testing method is suggested.
文中指出可以自吸性能曲线的斜率K，作为对不同型式自吸泵及其自吸能力强弱的评定值。
It is shown that the slope K of the self-priming performance curve is the estimation criterion to describe the self-priming ability of different self-priming pumps.
自升塔式起重机在载荷状态下，塔身非线性变形的主要表征是其顶部的水平位移和斜率。
The nonlinear deformation in tower body of self-elevating tower crane under load is characterized by the horizontal displacement and tilt ratio of its top.
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