space variance 空间可变性 ; 空间变体
space variance and division 空间分异与分区
Space-time variance 时空变动
space mean variance 空间平均方差
space-time variance analysis 时空变异分析
To enrich a system you need variance in time and space.
系统要变得丰富，就需要时间和空间上的不同步变化。
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。
This paper gives a necessary condition for the admissibility of a nonnegative, quadratic estimator for error variance in linear model with respect to restricted ellipsoidal parameter space.
本文给出了线性模型中椭球约束下，误差方差非负二次估计可容许的一个必要条件。
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