查询词典 variance

The existence of intraseasonal variability of SST in the whole SCS is confirmed by different statistical methods, like Singular Spectrum Analysis and Morlet Wavelet Analysis. It explains roughly 20-30% of the total sample variance .

对OISST资料进行奇异谱分析和Morlet小波变换分析的结果表明，南海全区SST存在显著的季节内变化是确定无疑的，而且是一种强信号，它的方差可以达到样本总方差的20-30％。

MethodsWe chose a sample schedule thatminimized the variance of the parameter estimates and the error in reconstructing the plasma insulin profile, trying toreduce the total number of samples of MMT from 30 to 12 or 10 and the time of MMT from 3 hours to 2 hours.

目的 为克服经典的最小模型技术样本数太多(30个)、历时太长(3小时)的缺陷，以减少样本数所获得的信息对估计参数和重建胰岛素曲线的误差降至最小范围。

The algorithm samples the system status from the optimal probability density and reduces the sample variance by using the variation principle and interval fitting.

该算法采用变分运算分析和区间拟合的方法，实现在最优密度函数下抽样，降低计算方差。

VAR calculates sample variance of the given sample.

"，"VAR 根据范例估计方差。VARP 根据全部基数计算方差。

The principal component analysis of the fitted decay NMR signal indicated the first two principal components could explain 80% of total variance and the sample with MTG added were different from the one without MTG in the case score figure.

对衰减NMR信号拟合结果进行主成分分析显示，前两个主成分可以解释变异方差的80%，并且加酶和对照在样品评分图上显著分开。

And then, adopting the same model, cyclic moment estimation statistic of different orders are constructed respectively, large sample variance expressions of the estimator through theoretic analysis are derived, as well as the constraint relation of estimator performance and noise statistical characteristic. The curve of estimation performance is obtained through Monte Carlo simulation test, which proves the related conclusion derived.

然后，论文同样以加性和乘性噪声联合干扰下的复谐波信号和复线性调频信号为观测模型，分别构造了基于不同阶次的循环矩估计量，从理论上推导出了估计量的大样本方差表达式，分析了估计量性能与噪声统计特性的约束关系，通过Monte-Carlo仿真试验得到了估计性能的曲线，验证了推导的有关结论。

In the case of 〓unknown,this dissertation derived the exact distribution of related statistics,and thenproposed the multivariate covariance control charts:the A chart and the 〓 chart based onthe sample generalized variance and the maximum and the minimum eigenvalues.

当分布参数〓未知时，本文通过推导有关统计量的精确分布，建立了基于样本广义方差和最大、最小特征根的多元协方差控制图—A图和〓图，为实际应用奠定了基础。

Acquired conclusion was that the sample mean value submitted to normal distribution, and the sample variance was composed of a number of linear sum of random variable submitted to Chi-Squared distr.

得出的结论是：样本均值服从正态分布，样本方差由若干个服从卡方分布的随机变量的线性之和组成；样本均值的期望等于各管落点期望的算术平均值，方差为各管方差的算术平均值；样本方差是各管落点总体平均方差的无偏估计，方差与各管落点散布的差异相关；样本均值与方差相互独立的充要条件是：各管落点属于独立同分布样本。

The journal supplies theoretical, practical and methodological topics of sequential analysis mainly for biostatisticians, clinicians and mathematicians, including hypothesis testing, analysis of variance, sample surveys, regression and correlation, experimental design, optimal stopping, nonparametric methods, quality control and Bayesian analysis etc.

该杂志主要为生物统计学家，临床医师以及数学家提供了序列分析上理论的，实践的以及方法学上的课题，包括假设验证，变异分析，样本调查，回归与相关性，实验设计，最佳的停顿，非参数方法，质量控制以及贝叶斯定理分析等等。

The results showed: the variance analysis of colour parameters among different species eucalypt wood are significant and the color index in heartwood is higher than that in sapwood.

摘 要：以五种桉树人工林木材为研究材料，用测色仪和氙衰减仪测试了五种桉树木材的颜色和耐光性，比较了这些桉树木材的颜色参数，结果表明：不同种类桉树木材材色参数之间差异显著，桉木心材部分的色品指数和色饱和度高于边材；桉木的耐光性随氙灯照射时间的增加而逐渐变差。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。