查询词典 variance

The climate characteristics of TCP were analyzed with variance analysis,trend coefficient and linear regression technique,followed by comparison with those of annal total rainfall in East China.Results show that the spatial distribution of TC rainfall is not uniform in East China with the...

结果表明：华东地区登陆台风降水量空间分布不均匀，福建东南沿海地区最大，具有向西北方向递减的趋势，这种趋势与地形等因素有关；TCP的年际变化明显，9 a和15 a周期显著；TCP年代际变化表现为20世纪50年代最多，70年代前开始减少，比华北地区台风降水减少出现的时间提早10 a；TCP与总降水两者的时间演变特点差异较大。

This dissertation deals with theoretical and practical aspects of antithetic and common random numbers for variance reduction in simulation of stochastic systems.

本文对复杂系统仿真中的公共随机数和对偶变量法进行了系统的论述，给出了各种条件下实现方差衰减的理论和实验结果，给出了估计一对具有独立和相关分量的向量函数的响应和期望的最优化证明，且推导出在弱条件下的方差衰减。

This paper proposes Latin hypercube sampling combined with variance reduction techniques of conditional expectation and antithetic variates to assess ultimate strength reliability of ship hull girder.

本文将拉丁超立方抽样法与条件期望和对偶变数方差减缩技术组合用于分析船体总纵极限强度可靠性。

Following the strategy proposed in this article, expectation and variance of total hedge error would approach zero when hedge frequency approach infinity.

若依此避险策略，则当调整避险组合次数越频繁时，总避险误差之期望值和变异数亦会趋近於0。

For a system with time delay, a approximate formula for calculating the residual servo variance is derived.

对于存在时间延迟的自适应光学系统，推导了计算大气湍流控制残余方差的近似公式，并给出了有探测噪声情况下确定系统最优控制带宽的公式。

In addition, cognition was consistently found to explain a significant proportion of the variance of the learners' performance with respect to the density, aptness and novelty of the metaphor generated whereas language proficiency was invariably not.

对于隐喻生成而言，学习者的认知能力对构成生成能力的三个变量：隐喻的数量、恰当性、新颖性的预测能力都极其明显，依次达到75.5%， 84.3%， 76.8%，而语言水平的预测力都不明显。

In order to achieve the aim of this study, a survey was conducted via a self-designed questionnaire of 403 novice teachers who had no more than three years of teaching experience in 28 junior high schools in Hsinchu County. Adopting SPSS to analyze the data thus collected, this study performed such statistical analyses as arithmetic mean, standard difference, t-test, One-Way Analysis of Variance, Pearson's correlation etc to verify hypotheses.

为达研究目的，本研究采用问卷调查法，研究对象为新竹县境内二十入所公立国民中学，任教年资在三年以下之新手教师，共403名，并使用研究者自编之「国中新手教师工作经验感受问卷调查表」为调查工具，将所得资料运用社会科学统计套装软体进行算术平均数、标准差、t考验、单因子变异数分析、皮尔逊积差相关等统计分析以验证假设。

The significance of the spatial variation in gene diversity among populations was estimated by per-forming a hierarchical analysis of genetic diversity among populations using the analysis of molecular variance model, as described in Michalakis and Excoffier (1996) and available in ARLEQUIN.

种间基因多样性空间变异的显著性用在分子变异模型上操作的种间遗传多样性层次分析来估计，如同Michalakis和Excoffier (1996)描述的，并且在 ARLEQUIN软件中也有效。

For example: locally most powerful rank tests; regression and the analysis of variance using ranks; asymptotic power and efficiency; goodness of fit tests; permutation tests and randomization as a basis for inference.

局部最大功效秩检验（；利用秩进行回归和方差分析；渐进功效和效率，拟合优度检验，排列检验和作为推断基础的随机化。

We discuss asymptotically best linear unbiased estimators of the Logistic population based on selected order statistics and give the formula of computing the ABLUE, the variance and the covariance of the ABLUE in limit, and properties of the ABLUE, and so on. We give the optimum chosen of spacing which is the ABLUE with maximum asymptotic relative efficiency based on complete sample when selected order statistics number is less than 10, and obtain its maximum asymptotic relative efficiency.

讨论基于Logistic总体Ⅱ型截尾样本的若干个样本分位数的总体分布参数的近似最佳线性无偏估计；给出了该近似最佳线性无偏估计的计算公式，估计方差与协方差的极限表达式及估计量的大样本性质等；给出了全样本，样本分位点个数固定，但不超过10情形下，使上述近似最佳线性无偏估计有最大相对联合估计效率时，样本分位数选取法及最大相对联合估计效率；为大样本情形下，该近似最佳线性无偏估计的应用提供了理论依据。

If you were not , and OS X just booted normally, have no fear.

如果你没有，和OS X刚刚启动通常，没有恐惧。

I only want to preserve our all .

我只想保存好我们的一切