Non-constant error variance or heteroscedasticity.
非常量误差方差或异方差性。
They avoid to calculate the inverse of the estimation error variance matrices, and have the generality.
它们避免了计算估计误差方差阵的逆矩阵，且具有通用性。
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。
After that, the author focus his attention on the pure sequential confidence for the error variance in linear models.
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。
The weight matrix is replaced by using weight coefficient, and avoids calculating inverse matrix of the error variance matrix.
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。
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，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。
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。
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。
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。
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。
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.
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。
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。
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.
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。
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并借助脉冲响应分析和方差分解，重点对中国近年来住房价格上涨中的金融因素进行分析。
Since there is no need to suppose the variance of error, the estimation method which we established is more efficient in application.
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。
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。
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中出现的一个错误，根据方差定理，提出数据予处理的必要与方法。
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%.
若提高测量仪表精度，则中心差分法估计方差相对值明显改善，可提高到10%以内。
The estimator got from this algorithm has the smallest variance of error among all linear estimators of reflection coefficients.
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 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。
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，依据滤波新息，动态调整测量噪声方差，使融合系统的均方误差始终最小。
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。
Smooth order amplitude variance was expressed by using state equation, and measurement error and noise were expressed by adopting observed equation.
状态方程表示了阶比幅值的平滑变化，观测方程表示了测量误差和噪声。
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.
模拟结果与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较优的。
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.
利用方差分析的方法分析计算误差与界址点点数、宗地面积大小间的关系。
In local chemical exploration, the variance analysis of three-stage-model must be applied to estimate analytical uncertainly and sample-collecting error.
在区域化探中必须应用三层套合方差分析对样品的采样误差和分析误差进行统计分析。
Finally, a new algorithm of multi-sensors fusion based on the variance of the measured error adaptive is given.
最终给出了一种基于测量方差自适应的多传感器数据融合算法。
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的方差分解这一分析框架下将前人实证研究的方法和结论统一在一个新的分析框架内，并完整而细腻地描述了二者的相互关系。
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的方差分解这一分析框架下将前人实证研究的方法和结论统一在一个新的分析框架内，并完整而细腻地描述了二者的相互关系。
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