variance of population

Returns the variance of a numeric expression evaluated over a set, using an unbiased population.

返回在某一集合上对数值表达式求得的方差(使用非偏置填充).

The method of judging the local convergence by the variance of the population's fitness and reducing the searching space of variable optimized is proposed, which enhances the searching efficiency.

采用了基于群体适应值方差的早熟判断机制，同时提出了一种缩小混沌搜索的变量空间范围的新方法，提高了搜索效率。

Best Unbiased Estimator for Trend& A Method of Getting Trend of Digital Elevation Model This paper proposed an algorithm for finding critical value of normal population variance under unbiassed tests with uniform dominance.

数字高程模型中求趋势的一种方法&无偏最优求趋势法本文给出了求正态总体方差的一致最优化无偏检验的临界值的算法。

Based on this, the author summarizes population statistics information and carries out analysis of variance to discuss the difference of the averages in the variable dimension in different property groups.

在此基础上，笔者汇总了人口统计资料，并借助方差分析探讨不同属性的群体在各变量维度上平均值的差异。

A kind of nonlinear regression estimator for limited Population is given and the quality and the sampling variance about is discussed.

对有限总体在不放回抽样的方法下，构造了一类非线性回归估计量，讨论了它的性质及其有关抽样误差。