Longitudinal data is typical related data, and it is desirable to choose correct data variance structure since the correct structure affects the efficiency of estimation.
纵向数据为典型的相关数据，数据方差结构选择的正确与否直接影响估计的效率。
The generalized variance ratio is a measure of efficiency.
广义方差比是一个效率度量。
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。
Calculation variance can be reduced by multiple important sampling technique, and then calculation efficiency can be improved.
复合重要抽样可以减小计算方差，提高计算效率。
The experiments results shown that the effect of rotational speed variance on the desalination and its efficiency wer. e obvious under same experiment condition.
实验结果表明，在实验条件相同的情况下，离心转速的变化对灰白冰的脱盐、脱盐效果均有显著影响。
Conduct and perform to analyze both in direct material and indirect material usages report, labor efficiency report, overhead evaluation, finding the variance problem and raised to company management.
编制并分析直接及间接原材料使用报告、人工效率报告，间接费用分析，发现问题的差异并上报至公司管理层。
The experimental results show that the effect of rotational speed variance on the desalination and its efficiency are obvious under the same experiment condition.
实验结果表明，在实验条件相同的情况下，离心转速的变化对灰白冰的脱盐、脱盐效果均有显著影响。
The quality variance of human capital is defined at the first and is conformed that the efficiency of human capital could reflect the performance of enterprise financial report.
论文首先定义人力资本质量，确立质量变动产生的人力资本效能，能够反应到企业的财务绩效之中。
Comparing to the 1st generation, all kinds of thermal loss, thermal efficiency and combustion efficiency have the similar variance law, but the degree is different.
与第一代生物质成型燃料热水锅炉相比，各项热损失、热效率和燃烧效率有着相似的变化规律，但其大小有着不同程度的改变。
The method of minimum interclass variance needs to compute conic statistic in segmenting image, which costs a large computation but has less efficiency.
最小类内方差法分割图像时需要计算二次统计量，运算量大，效率不高。
The purpose of this paper is to summary the literatures on tests of portfolio mean-variance efficiency in the framework of classical statistics and Bayesian inference.
评述了应用经典统计学和贝叶斯推断检验资产组合均值方差有效性的文献，提出了这些方法在我国应用-的可能性。
Through variance ratio test, we find the Chinese warrant markets do not reach weak form market efficiency, and simple trading rules of technique analysis prove some kind of efficacy.
通过方差比检验，我们发现中国权证市场不具弱有效性，简单交易规则一定程度上能在权证市场中有效预测。
On the whole, the combustion efficiency of the coal powder with additives increases by 20%; meanwhile, the range analysis and variance analysis are used with the experimental data.
总体上，混有添加剂煤粉的燃烧率相对于未添加任何物质的基准试样煤粉提高了20%左右，并对试验结果进行了极差和方差分析。
On the whole, the combustion efficiency of the coal powder with additives increases by 20%; meanwhile, the range analysis and variance analysis are used with the experimental data.
总体上，混有添加剂煤粉的燃烧率相对于未添加任何物质的基准试样煤粉提高了20%左右，并对试验结果进行了极差和方差分析。
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