step distribution method

The method for proper determination of the time step and space interval is studied. Calculation of the gas emission rate according to gas pressure distribution is analyzed when finite difference method is applied to simulate the gas flow in coal seams.

对应用有限差分法解算煤层瓦斯流动时，如何选取合适的时间步长和空间步长、如何根据煤层瓦斯压力分布计算煤壁瓦斯涌出量等问题进行了分析和探讨。

The first step of this method was to allocate standard rank scores to the levels of ordered class variables according to the marginal frequency distribution of the ordered variables, then to form the linear tendency Chi-square statistic referring to the characteristics of linear rank statistic distribution.

该方法首先对有序分类变量的各水平按其边际频数分布配置标准化秩得分，然后按线性秩统计量的分布特征构造线性趋势x~2统计量。

Crowd excitation is simulated by random method according to normal footfall force curve and other individual factors such as distribution of crowd, step frequency and physiological characteristics.

根据单步落足曲线，结合影响人群行走效应的因素如人群分布、行走频率及个体生理特征等，采用随机方法模拟人群行走激励。

In this article, the writer analyzes time conversion and method of inverse monent on double alternative step-stress accelerated life test for Weibull distribution.

首先针对高可靠、长寿命电子装备的可靠性评估问题，提出一种新的试验方法&双应力交叉步阶试验。