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• Non-constant error variance or heteroscedasticity.

非常量误差方差方差性。

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• They avoid to calculate the inverse of the estimation error variance matrices, and have the generality.

它们避免计算估计误差方差矩阵，具有通用性

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• We study the admissibility of the quadratic estimate for error variance in two classes of growth curve model.

次损失函数下，研究增长曲线模型误差方差非齐次二次型估计的可容许性问题。

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• After that, the author focus his attention on the pure sequential confidence for the error variance in linear models.

紧接着作者注意力转移到线性模型误差方差序贯区间估计。

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• The weight matrix is replaced by using weight coefficient, and avoids calculating inverse matrix of the error variance matrix.

计算加权系数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矩阵。

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• At first, we analyze sample index funds' historical risk levels as well as their risk structure by means of decomposition of tracking error variance.

首先样本指数基金跟踪误差方差进行分解，分析历史风险水平；然后，引入压力测试，预测样本指数基金未来的风险水平。

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• 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.

进一步从建立航路预测误差要求出发，匀速直线运动假设，使用激光重频值，激光测距预测误差方差能达到工程要求。

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• 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.

本文给出了线性模型椭球约束下，误差方差二次估计可容许一个必要条件

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• 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.

通过背景误差方差特征长度调整，显著改善了背景误差功率谱的分布特点，使得NMC方法结果更新矢量方法结果更为吻合。

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• 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.

然后通过误差方差阵逆矩阵分析比较详尽分析了不同数量视线观测条件下导航算法的可观可观性。

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• 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.

状态估计领域中，指标要求直接状态分量估计误差方差上限的形式给出。

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• 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.

研究两次重复试验因子效应随机模型误差方差检验问题，推导检验统计量检验规则具体表达式

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• 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.

得到初始控制点后，以方差检验误差检验递归排除错误的控制点，从而得到最终的控制点对。

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• With Vector Error Correction Model, impulse response analysis and variance decomposition, this paper analyzes the finance factors that cause the prompt rise of house price in China.

通过建立向量误差修正模型借助脉冲响应分析方差分解重点中国近年来住房价格上涨中的金融因素进行分析

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• Since there is no need to suppose the variance of error, the estimation method which we established is more efficient in application.

由于估计方法无需假定误差方差，因此，所构造估计方法符合实际应用情况。

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• 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.

目的通过估计误差方差多传感器组合导航系统不同融合数据进行定位精度比较系统定位提供选择数据的依据

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• Focusing on an error appeared in big number error computation on computor, this paper gives the necessity and method for data per-processing based on the Theorem of Variance.

本文针对计算器在大数误差计算出现一个错误根据方差定理提出数据处理必要方法

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• If we heighten the precision of measuring equipment, the central difference's relative error of the estimation variance improved great, which is less than 10%.

提高测量仪表精度，则中心差分法估计方差相对值明显改善提高到10%以内

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• The estimator got from this algorithm has the smallest variance of error among all linear estimators of reflection coefficients.

这种方法反射系数估计量具最小误差方差性质。

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• 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.

研究一类随机系统具有期望动态误差系数稳态输出方差相对稳定裕度约束满意PID控制问题

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• With covariance matching technique and innovation information of filtering, the noise variance is dynamically adjusted and the mean square error of the fusion system always keeps minimum.

该算法采用协方差匹配技术，依据滤波动态调整测量噪声方差使融合系统误差始终最小。

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• 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.

通过分析某精密转轴轴心径向回转误差运动轨迹方差变化规律证明回转运动具备分数布朗运动的基本特征

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• Smooth order amplitude variance was expressed by using state equation, and measurement error and noise were expressed by adopting observed equation.

状态方程表示比幅值平滑变化观测方程表示了测量误差噪声

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• In comparison with BP method and RBF method, the SVM method is proved to be the best in terms of absolute error, relative error, correlation coefficient and variance.

模拟结果BP网络方法、R BF网络方法相比，在绝对误差相对误差、相关系数以及数据方差方面都是

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• Also, by using variance analysis, the relation of calculation error to the number of parcel corner points and the size of parcel area is analysed.

利用方差分析方法分析计算误差界址点点、宗地面积大小关系

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• In local chemical exploration, the variance analysis of three-stage-model must be applied to estimate analytical uncertainly and sample-collecting error.

区域化探必须应用三层套合方差分析对样品的采样误差分析误差进行统计分析。

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• Finally, a new algorithm of multi-sensors fusion based on the variance of the measured error adaptive is given.

最终给出一种基于测量方差自适应多传感器数据融合算法

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• In this paper we use the variance decomposition of the vector error correction model(VECM) to perfectly and detailedly show the relationship between the housing price and the land price.

本文在基于向量自回归类模型方差分解一分析框架下将前人实证研究的方法结论统一在一个新的分析框架内，并完整细腻地描述了二者的相互关系。

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• In this paper we use the variance decomposition of the vector error correction model(VECM) to perfectly and detailedly show the relationship between the housing price and the land price.

本文在基于向量自回归类模型方差分解一分析框架下将前人实证研究的方法结论统一在一个新的分析框架内，并完整细腻地描述了二者的相互关系。

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