A simplified formula of using the two-state Poisson model to analyse the seismic hazard is given in this paper.
本文从双态泊松模型的基本概念出发，给出了它应用于地震危险性分析中的简化公式。
A simplified formula of the optimum index is given, and the problems of application of the indices are discussed.
文中还简化了最宜指数的计算公式，并讨论了各种选择指数的应用问题。
The author has derived a formula for the pressure Angle and a simplified formula for such a spatial four-bar linkage.
作者推导了该空间四杆机构中的压力角公式及其简化公式。
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