covariance
英
美
n. （数学）协方差；协变性；共离散
复数：covariances
BNC.30657 / COCA.21478
英英释义
noun
- (statistics) the mean value of the product of the deviations of two variates from their respective means
双语例句
- Blind Separation Algorithm Based on Diagonalization of the Covariance Matrix
基于协方差矩阵对角化的盲信号分离 - 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.
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。 - This method established is applicable to collision probability problem involving relative velocity and error covariance changing with time.
所建立的这种描述和计算方法适用于相对速度和误差协方差矩阵随时间任意变化的情况。 - Background error covariance is an important part of variational data assimilation system, which is used to spread the observation information to other grid points and vertical levels of the model.
背景误差协方差是变分资料同化系统中的一个重要组成部分，能将观测信息从观测点传播到周围的模式格点和垂直层上。 - For the constraint system of covariance matrix being uncertain, a robust moving horizon estimation ( MHE) strategy is discussed.
针对噪声方差不确定的约束系统，讨论了一种鲁棒滚动时域估计（MHE）方法。 - A semi-parametric estimation method of systemic errors and covariance matrices in Kalman filter
一种Kalman滤波系统误差及其协方差矩阵的半参数估计方法 - Objective To study the effect of covariate imbalance on analysis of covariance.
目的探讨协变量的不均衡对协方差分析的影响。 - Due to these correlations, the channel estimate and its error covariance is obtain by utilizing the outdated CSI.
根据相关性，利用过时的信道信息来对当前信道进行估计，并得到估计误差方差。 - For this special multisensor system, distributed optimal fusion algorithm is received by avoiding computing correlated estimation covariance based on the matrix operation.
在这类特殊的多传感器系统中，本文通过矩阵运算消除相关估计方差，得到了最优分布式融合估计算法。 - A full introduction to covariance and contravariance would take too long.
对协变与逆变的完整介绍要花很长时间。