方差公式

本文推导了有限频域[fa，fb]中的噪声引起的修正的Allan方差公式，为噪声的谱密度变换成Allan方差提供了准确的公式。

It provides a lot of accurate formulae for spectral density transforming into Allan variance .

但对闪烁相位噪声所引起的Allan方差公式中的常数，许多文献给出的数值相差很大。

But the constant value in the Allan variance formula due to flicker phase noise given in some literatures is quite different .

本文还指出了，文献[3,6,9～11]在计算闪烁相位噪声的Allan方差公式的不妥之处。

It is also pointed out that the Allan variance formulas in some literature [ 3,8,9-11 ] for calculating the flicker phase noise are improper .

推导了令牌循环时间和报文等待时间的平均值和方差公式。

Analytic formulae for mean values and variances of token cycle time and message waiting time are derived under proper conditions .

分析了改进方法的抗噪声性能，推导出了在高斯白噪声背景下频率估计误差的方差公式，并通过仿真计算验证了推导公式的正确性。

The anti-noise performance of the improved method is also investigated in this paper , and the variance equation of the frequency estimation error in the presence .

根据CBCT图像的特点，提出了适合CBCT图像的噪声方差估计公式，使其更适合CBCT图像噪声的去噪。

According to the characters of CBCT image , we proposed the noise variance estimation formula .

本文根据多参数的R-C不等式和优效计量定理，得到了函数模型和随机模型参数估计的方差下界公式。

Based on the R-C unequality of multi-parameters and the theorem of the superior efficiency estimation , the formulae of the variance inferior boundary for the estimation of functional model and stochastic model parameters are derived in the paper .

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

单位权方差估计公式及其chi-平方统计量；

The unit weight variance estimation formula and its Chi-square statistic and F - statistic ;

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 .

最后，给出在条件独立的条件下，积的条件期望与和的条件方差的公式。

Some examples about the application of conditional independence to conditional expectation and variance are given .

与传统的方差估计公式相比较，新公式不仅形式简单，而且大大减少了方差估计的计算量。

Compared with the traditional estimation formula , the new one is simpler with less calculation .

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 .

单位权方差估值公式的推导及经典平差方法的局限性讨论

The Deduction of the Unit Weight Variance Formula and Some Analysis on Limitation of the Classical Adjustment

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 .

通过正交最小二乘辨识方法获得系统闭环模型，在此基础上由方差分解公式计算得到非线性系统的最小方差控制性能指标。

Moreover , based on the achieved model , the minimum variance performance index of nonlinear systems is calculated by using variance decomposition formula .

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 .

附限制条件的序贯平差及方差分量估计公式

The sequential adjustment with constraints and estimative formulas of variance components

化简了G&M模型的方差分量估计公式。

And the estimate formular of variance part in G-M model was simplified .

扩建网极大条件密度估计及其方差分量估计公式

Maximum Conditional Probability Density Estimation of Extended Networks and Its Estimation Formulae for Variance Components

赫尔默特方差分量估计公式。

The Helmert variance component estimation formula .

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 .

联系参数函数不独立扩建网极大验后估计的方差分量估计公式

Estimation Formulae for Variance Components of Maximum Posterior Estimation with Functionally Correlative Connected Parameters Used to Extended Network

统一方差分量估计公式

Unified Variance Components Estimation

这些观测值的最佳权比需用方差分量估计公式迭代计算求得。

The optimum weight ratio of these abservation values should be obtained by iterations of the variance components estimate formulae .

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 ;