方差计算公式

结果：一、本研究中将抽样技术理论和随机应答技术的理论相结合，推导出二阶段抽样方法下八种RRT模型调查敏感问题时总体比例的估计量及其方差计算公式。

Sampling technology theory was combined with the theory of RRT in this study , and formulae were deduced for the estimator of the population proportion and its estimated variance for eight RRT model used for sensitive questions survey in two-stage sampling . 2 .

组距分组资料方差计算公式修正形式

Correction of Calculation Formula for Calculating Variance of Grouping Data Within Distances in Statistics

推导出了正态分布下大额赎回量的期望和方差计算公式。

The expectation and variance of LAR formula is given by inference under normal distribution .

研究发现其根本原因是回归分析中均方差计算公式不合适。

The reason is that the formula of calculating mean square deviation in regression analysis is unsuitable .

给出了传递函数、响应功率谱、响应方差计算公式。

The transfer functions , response power spectrum density functions , and root-mean-square ( r.m.s ) values are obtained .

对一粒缫调查所得的一组数据，分别应用现行茧丝纤度综合均方差计算公式与统算法计算，得出不同结果。

Different results are obtained when the current formula of raw silk denier synthetic mean-square deviation and the statistical method are applied respectively to calculating a set of data collected in an investigation on single cocoon reeling .

采用以变形定义的双层地基一维固结的计算模式，将竖向固结系数作为不确定性变量，当其服从Gamma分布时，推导了双层地基一维固结的平均固结度均值和方差的计算公式。

The calculating model of consolidation defined by deformation for one-dimensional double-layered soil , and the coefficient of vertical consolidation as a determinate variable with Gamma distribution were used to obtain , the formulas of expectation and variance of average consolidation degree for double-layered soil .

根据具有不定参数的结构特征值Taylor展开式，推导出特征值随机变化的统计特性（均值、方差）计算公式。

On the basis of Taylor 's expansion of the eigenvalues with random parameters , the formulae of calculating the statistics ( the mean value and the variance ) are obtained . Using the perturbation Riccati transfer matrix method a simple supported beam is used as an example .

推导了砂井地基固结度期望值和方差的计算公式。

The formulas of expectation and variance of degree of consolidation for sa nd-drained ground are obtained .

根据接触悬挂系统中的接触线振动方程，推导了接触线应力的均值和方差的计算公式。

Vibration equations of contact wires were used to derive the formulae for calculation of mean and standard deviations of stresses .

运用随机振动理论，分析了地震作用下并联基础隔震结构层间最大位移的概率统计特性，导出了其均值和均方差的计算公式。

In accordance with the random vibration theory , the statistical probabilistic characteristics about the maximum displacement response between layers of parallel base isolated structure , are analyzed ;

文中首先给出了杂交模式的裂纹尖端奇异单元的刚度矩阵，然后基于随机场的局部平均理论和一阶泰勒展开得到了应力强度因子均值和方差的计算公式。

The stiffness matrix of a hybrid crack-tip singular element is first derived , then by use of first-order Taylor expansion the mean and variance of stress intensity factors are formulated .

研究了考虑到对数振幅起伏时大气湍流中的漫射目标的散射统计特性，导出了散射场的强度协方差和强度方差的计算公式，讨论了不同湍流强度、波长和传播距离对它们的影响。

The effect of the log-amplitude covariance as well as the wave structure function are considered , the effects of the turbulence on the mutual coherence function , mean intensity , covariance and variance of the scattering fields for a diffuse target are also analyzed .

提出了用于得到最优加权系数的局部滤波误差方差和协方差计算公式。

The formula of computing variance and covariance among local filtering errors is presented , which is applied to obtain the optimal weighting coefficients .

给出了由子矩阵组成的分块矩阵时，随机变量二次型的方差、协方差的计算公式。

The formulas to calculate the variance of a quadratic form with the matrix composed of submatrices are given in this paper .

结果推导出数量特征敏感问题加法模型二阶段抽样调查总体均值的估计量及其方差、估计方差的计算公式。

Results Formulas for the estimation of the population proportions and its variance on additive model for quantitative sensitive question survey were deduced .

为此，本文提出将方差自适应技术引入到粒子滤波算法中，通过对系统过程模型噪声方差的修改，达到改善重要性密度函数的目的，并给出了自适应方差的计算公式。

Therefore , the variance adaptive technology is introduced in particle filter in this paper . Though modifying the variance of the process model noise of system , the performance of importance density function is improved . The formula of adaptive variance is proposed .