查询词典 covariances

It was incorporated the number of the grades of CYP2D6 genotype and physiologic factors as covariances into modeling study.

之后将CYP2D6基因型分成四种等级以数字表示及生理因子当作共变数代入药动学模式中。

Based on the Lyapunov equations, the formulas of computing local predicting error variances and covariances are given, which are applied to compute optimal weights.

其中提出了基于Lyapunov方程的局部预报估值误差方差阵和协方差阵计算公式。

This system can examine the information of various covariances, and find out the pollutant in order to put the regulation from the inside, and enhance the monitoring and manage of in-use vehicles .

随着汽车保有量的不断增加，汽车排放污染越来越引起人们的关注，本系统利用 VC++语言编程、Access建库对在用汽车的各种信息进行监测和管理，并能对所检测的数据信息进行多种统计分析，从中找出其污染物的排放规律，以切实加强对在用汽车的排放监测和管理

In this paper a method of using input - output sequences in a real system to identify a constant, multi-variable and stochastic linear system having unknown dimensions, system matrices and noise covariances is developed.

本文提出了利用实际系统的输入—输出试验数据，辨识具有未知维、参数阵和噪声协方差阵的定常、多变量、随机线性系统的方法。

The time-dependent equivalent linear system is considered and therecuraive relations for evaluating the variances and covariances ofdisplacament and velocity are obtained.

考虑了等效线性化系统的时变性；获得了位移、速度的均方和协方的递推关系，给出了一个算例，将计算结果与其它文献的结果进行了比较，证明该方法是简单、精确和有效的。

In this paper, taking nodal injection power and voltage operation curve of PV node as foundation, according to the basic property of numerical characteristics of random variables and relevant equations for probabilistic load flow calculation the expectations of nodal current, reactive power at PV node and power at balancing node as well as computing formula of covariances are derived by different methods; the computation accuracy of various algorithms are compared and analyzed.

文章以节点注入功率和PV节点电压运行曲线为基础，依据随机变量数字特征的基本性质和概率潮流计算的相关方程，分别采用不同的方法推导了节点电流、PV节点的无功功率及平衡节点功率的均值和协方差计算公式，比较和分析了各种算法的计算精度。

The main results achieved are:The computation of the means,variances,and covariances of logistic orderstatistics for sample sizes 〓 and some other selected values up to 100 byusing FORTRAN computer programs and showing that similar results for otherdistributions can easily be achieved with slight modification to the programs.

对〓的样本量和某些挑选的高达100的样本量，用FORTRAN计算机程序计算了Logistic的顺序量的均值、方差和协方差，得到了有关的数据文件。

This paper considers the design method of robust Kalman filter with uncertain noise for discrete-time linear system. The perturbating upper bound on uncertain covariances which can guarantee performance index of estimation errors is obtained.

确保状态估计性能的离散时间鲁棒Kalman滤波器奚宏生（中国科技大学自动化系合肥230027）摘要讨论了一类具有不确定噪声的离散时间线性系统的鲁棒Kalman滤波器的设计思想和方法。

Throughout comparing the above estimating methods, we have the following results: the estimators of the moments of the errors does not depend on the random effects, and that of the random effects does not depend on the errors, and then the corresponding asymptotic variances are very simple and optimal; when the random effects are multivariate, we can not construct different estimating equations for the random effects and errors respectively, which results that the asymptotic covariances of estimation are very complex and then the estimating efficiency is bad.

比较上述两种估计法，我们发现：当随机效应是一维的时侯，误差的各阶矩的估计不依赖不可观测的随机效应，随机效应的估计也不依赖误差，因此，估计的渐近方差结构特别简单也是最优的；而当随机效应是多维的，因为随机效应的协变量的影响，我们没有办法针对随机效应和误差的各阶矩分别建立估计方程，这导致所得的估计的渐近方差或者协方差矩阵特别复杂，从而估计的效果不是很好。

General data fusion for estimates with unknow cross covariances.

北向平台误差角和东向速度误差的仿真结果如图6、图7所示。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。