Then obtain base-case, best-case, and worst-case NPV and calculate mean NPV and standard deviation to (roughly) estimate the magnitude of the risk inherent to the project.
然后得出基本情况，最好情况，最差情况下的净现值，再计算平均净现值和标准偏差，（粗略地）估计该项目的内部固有风险的大小。
Meanwhile, areas for the method to be usable, deviation of magnitude estimating and physical meaning of the method are discussed.
同时对方法适用的地区、估定震级的偏差、以及方法的物理意义做了讨论。
With the propagation theory of seismic wave, we analyzed the factors related with the magnitude and position deviation.
本文根据地震波传播理论，对出现这些偏差的因素进行了探讨。
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