母体，随机样本。样本统计， 样本平均数和变异数的动差。
Populations, random samples. Sample statistics, moments of the sample mean and variance.
3方差的专业定义是随机变量的二次中心矩，与期望值之差的平方的加权平均值。
The technical definition of variance is the random variable's second central moment, the weighted average of the square of the differences from the expected value.
西格玛黑带应能识别在各种可能原因的列表中，哪一个原因最合适解释在回归残差中出现的非随机分布。
The Six Sigma Black Belt should be able to identify which cause on a list of possible causes will most likely explain a non-random pattern in the regression residuals.
治疗效果采用相对危险度和加权均数差(采用随机效应模型的95%可信区间)概括。
Treatment effects were summarised as relative risks or weighted mean differences with 95% confidence intervals by using a random effects model.
两相流流过节流装置时产生的差压测量噪音是由于相浓度在空间的随机分布所引起的。
The spatial stochastic distribution of phase concentration would cause a differential pressure noise when two phase flow is crossing a throttling set.
还指出由于当前的连续小波神经网络主要使用传统BP神经网络的随机初始化方法和基于梯度的训练算法，因此存在收敛性差的缺点。
It is also indicated that current WNN has a poor convergence performance because of adopting the random initialization method and gradient training algorithm of traditional BP NET.
还进一步讨论了B值鞅差序列随机加权和的收敛性。
Moreover, we discuss the convergence for randomly weighted sums of B-valued martingale difference series.
相位抖动：指的是反馈时钟和参考时钟之间上升沿差异与多次随机采样的平均偏移之间的差。
Phase Jitter: refers to the deviation of the FBKCLK rising edge to the REFCLK rising edge with respect to the average offset in a random sample of cycles.
结果显示随机概率抽样方法拟合的相函数与散射相函数间的方均根差更小。
The result showed that the root-mean-square of Phase function fitted by random probability sampling method is smaller.
该物理量融合了随机序列的相关性和信息论中信源熵的思想，综合反映了残差中所残留的信息量。
The quantity fuses correlation of stochastic process and idea of entropy in information theory, it indicates the amount of information left in residual series.
利用差分法、平滑法减小测量结果中的随机噪声；
Random noise are minished by using method of difference and flatness .
本文应用对母函数微分的方法得到正态随机矩阵多项式的均值与协差阵的表达式。
An expression for the mean and covariance matrix of normal random matrix polynomial is derived by applying the method of matrix differentiation to generating function.
最后，对上述的两层有限差分格式在一定条件下进行了离散随机游走的解释。
Finally, the finite difference scheme was interpreted by a discrete random walk model under a certain condition.
本文提出依据随机参数的均值和标准差取值，将各随机参数取值组合后再用模拟法计算失效概率。
This paper proposed that according to random variables mean value & standard deviation, its values are determined and are combined, then the failure probability is calculated by simulation.
最后，利用高阶的交错网格有限差分方法，我们模拟了地震波在具有随机分布裂缝岩石中的传播特征。
Numerical modeling results for seismic wave propagating in rocks with random dis- tributed fractures using a staggered high-order finite-difference (SHOFD) are also presented.
对于从属随机变量统计特征的确定，本文介绍了一种精确高效的确定其均值和标准差的方法。
A new method which can efficiently and accurately calculate the mean and standard deviation of a dependent random variable is proposed.
在考虑网络中用户的路径选择行为满足概率型随机平衡的条件下，给出了交通网络设计的双层规划模型，同时设计了基于差分的启发式求解算法。
On the condition that the stochastic equilibrium restraints are satisfied as the network clients select the path, the author presents bilevel planning model for traffic network design.
变量的均值敏感性因子和标准差敏感性因子是高度相关的，都可以用来识别最敏感的随机变量。
The mean sensitivity coefficient and the standard deviation sensitivity coefficient are strongly related and both can be used to identify key contributing random variables.
分析了在相同数据和随机数据扩频调制条件下接收信号信噪比估计的计算方法，并对于有频差情况下的计算方法进行了说明。
The two cases of pilot modulated data and random modulated data were theoretically analyzed, and the calculating method was also presented when the frequency offset existed.
通过求解随机有限元的递推方程，得到框剪结构各层的地震动力响应均值和标准差历时曲线。
By solving recurrence equation of stochastic finite element, the duration curve of mean value and standard deviation of seismic response can be obtained for every floor of frame shear structure.
最后，作者提出了参数为随机的自由网平差新方法。
Finally, a new method concerning the adjustment of free networks with stochastic parameters is given.
考虑到设计参数的随机性，给出了偏曲轴输入少齿差行星减速器设计的可靠性优化数学模型。
Considering the randomization of design parameters, a dependability optimization mathematics model is given for the planet reducer of a few tooth difference with biasing bent shaft.
随机延迟微分方程数值方法中欧拉方法是唯一较为成熟、有效的方法，但欧拉方法的收敛性差，其收敛阶仅为二分之一。
Only the Euler method is popular and efficient among the numerical methods for the stochastic delay differential equations, but its order of convergence is only 1/2.
首次给出求解确定性与随机常系数差分方程及确定性与随机时变系数差分方程的统一方法；
The unified method of solving LDS(linear discrete system) difference equations of determinate and time varying coefficients as well as stochastic and stochastic time varying coefficients is proposed.
该方法实质是寻找一分数阶因子，使随机分形信号通过分数差分后的输出信号最接近白噪声。
The method is to find out a fractional factor that makes the fractional differenced result closest to the white noise.
合理选择残差信号的阈值，能够可靠地诊断汽车发动机电控系统负载不可测且存在随机干扰时的故障。
The faults in the automotive engine control systems can be reliably diagnosed by the proposed method through suitable choice of the threshold for the residual signals of the UIFDOs.
利用此法，能计算结构静响应的均值和标准差，估价制造误差引起的结构力学性能的随机性误差。
We can use this method to calculate the mean values and standard deviations of the responses, and estimate the stochastic errors of structural characters resulting from the fabrication errors.
随机周期长度偏差对准相位匹配波导中差频效率的影响要比随机占空比偏差的影响来得大，这与单块周期极化晶体中的情况类似。
With the same magnitude, random period error casts much larger effect on the conversion efficiency than random duty cycle error, which is similar with the case in bulk crystals.
随机周期长度偏差对准相位匹配波导中差频效率的影响要比随机占空比偏差的影响来得大，这与单块周期极化晶体中的情况类似。
With the same magnitude, random period error casts much larger effect on the conversion efficiency than random duty cycle error, which is similar with the case in bulk crystals.
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