非常量误差方差或异方差性。
这种方法对反射系数的估计量具有最小误差方差的性质。
The estimator got from this algorithm has the smallest variance of error among all linear estimators of reflection coefficients.
它们避免了计算估计误差方差阵的逆矩阵，且具有通用性。
They avoid to calculate the inverse of the estimation error variance matrices, and have the generality.
对因子设计而言，现已有若干种不同方法来估计实验误差方差。
For fractional factorial designs several different approaches to estimate this variance have been suggested.
紧接着，作者把注意力转移到线性模型误差方差的纯序贯区间估计。
After that, the author focus his attention on the pure sequential confidence for the error variance in linear models.
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.
为了计算最优加权，提出了局部估计误差方差阵和互协方差阵的计算公式。
In order to compute the optimal weights, the formulas of computing the local estimation error covariance and cross-covariance matrices are presented.
为了计算最优加权，提出了状态估计误差方差阵和互协方差阵的计算公式。
The formulas of computing the variance and cross-covariance matrices among local state estimation errors are presented, which are applied to compute the optimal weights.
在状态估计领域中，指标要求常直接以状态分量的估计误差方差上限的形式给出。
The motivation for this study is that in the area of state estimation, the Performance requirements are usually described in terms of the upper bounds on the error variance of state estimation.
本文给出了线性模型中椭球约束下，误差方差非负二次估计可容许的一个必要条件。
This paper gives a necessary condition for the admissibility of a nonnegative, quadratic estimator for error variance in linear model with respect to restricted ellipsoidal parameter space.
由于在估计方法中无需假定误差方差，因此，所构造的估计方法更符合实际应用情况。
Since there is no need to suppose the variance of error, the estimation method which we established is more efficient in application.
在二次损失函数下，研究了增长曲线模型误差方差的非齐次二次型估计的可容许性问题。
We study the admissibility of the quadratic estimate for error variance in two classes of growth curve model.
在二次损失函数下，研究了增长曲线模型误差方差的非齐次二次型估计的可容许性问题。
The admissibility of non-homogeneous quadratic form estimate of variance on the growth curve model was studied under quadratic loss function.
用计算加权系数的方法代替了原来的计算加权矩阵，从而避免了求解滤波误差方差阵的逆矩阵。
The weight matrix is replaced by using weight coefficient, and avoids calculating inverse matrix of the error variance matrix.
文中给出并证明了在椭球约束条件下线性模型中，误差方差的非负二次估计的可容许性问题的一个必要条件。
The paper raises and proves an essential condition of volumetric property of nonnegative secondary estimation of deviation and variance in linear model.
研究两次重复试验三因子全效应随机模型误差方差的齐性检验问题，推导了检验统计量和检验规则的具体表达式。
According to the homogeneity test for error variance on total-effect random model with three factors in double repeated experiment, the specific formulae of test statistics and test rule are deduced.
然后，通过对误差方差阵逆矩阵秩的分析，比较详尽地分析了不同数量视线观测条件下导航算法的可观度和可观性。
Then, navigation system observability and observable degree with different quantitative line-of-sight measurements are analyzed in detail by rank analysis of the error variance inverse matrix.
目的通过估计误差方差阵，对多传感器组合导航系统中不同的融合数据进行定位精度比较，为系统定位提供选择数据的依据。
Aim Using the variance matrix of estimated error, positional accuracy can be compared with different mixing together data, it has put forward a kind of basis for system location to select data.
首先，对样本指数基金的跟踪误差方差进行分解，分析其历史风险水平；然后，引入压力测试，预测样本指数基金未来的风险水平。
At first, we analyze sample index funds' historical risk levels as well as their risk structure by means of decomposition of tracking error variance.
通过对背景误差方差、特征长度的调整，显著改善了背景误差功率谱的分布特点，使得NMC方法结果与更新矢量方法结果更为吻合。
After the tuning of background error variance and de-correlation length, results from the NMC-method are closer to those of the innovation vector method, and the analysis results are improved.
进一步从建立航路的的预测误差要求出发，在匀速直线运动的假设下，使用该激光重频值，激光测距的预测误差方差能达到工程要求。
Under the assumption of line movement with constant velocity, the flight path is built such that prediction error variance computed by the LFR times meets the specified requirements.
在得到初始控制点对后，以方差检验和误差检验来递归排除错误的控制点对，从而得到最终的控制点对。
When initial control point pair is obtained, variance check and error check were used to exclude fake control point pairs to get the final ones.
对应于方差参数这两种估计的回归系数的两种两步估计，它们的均方误差大致相当。
However, two-stage estimates of regression coefficients corresponding to these two estimates have approximate equal mean square error.
研究一类随机系统具有期望的动态误差系数、稳态输出方差和相对稳定裕度约束的满意PID控制问题。
The problem of satisfactory PID control for a class of stochastic systems with constraints on dynamic error coefficient, steady-state output variance and relative stability margin is considered.
对改进算法中二次滤波的噪声方差参数选取采取一种计算反卷积剩余误差的方法，用在第二次滤波步骤中。
The paper also gives an algorithm for estimating the variance of the imaging noises by computing residual deconvolution errors, which is used in the second step of the modified Wiener filter.
通过分析某精密转轴轴心径向回转误差运动轨迹的方差变化规律，证明该轴的回转运动具备了分数布朗运动的基本特征。
According to variance changing laws of a precise rotor radial rotating error motion, it can be proved that the rotor's motion track is characterized by fractional Brownian motion.
为了计算最优加权，提出了局部估计误差互协方差的计算公式。
In order to compute the optimal weights, the formula of computing the cross-covariance among local filtering errors is presented.
提出了一种基于信息效能函数的传感器管理最优决策模型，分析了以预测误差协方差为分配效能的分配算法的最优性。
An optimal decision model of sensor management based on information efficacy function is proposed. The optimality of the allocation algorithm based on predicting covariance is analyzed.
提出了一种基于信息效能函数的传感器管理最优决策模型，分析了以预测误差协方差为分配效能的分配算法的最优性。
An optimal decision model of sensor management based on information efficacy function is proposed. The optimality of the allocation algorithm based on predicting covariance is analyzed.
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