使用最小方差法来确定最吻合的直线涉及寻找使预测方差最小的m和b的估计值。
Using a least-squared-error criterion to determine the line of best fit involves finding estimates of m and b that minimize the squared error of prediction.
因为这时模型协方差阵结构仍含有方差参数，因此我们的目标是寻求可行估计。
The variance-covariance matrix still include parameter of variance in this condition, so our purpose is to look for feasible estimations.
实时估计出系统噪声方差矩阵和量测噪声方差矩阵，对状态变量进行灰色聚类，并对滤波矩阵和增益矩阵进行实时自适应调整，计算出状态向量的递推估计值。
Based on real-time estimation of noise matrix and grey clustering of state variable, filter or gain matrix is modulated so as to get an estimation of the state vector.
模拟频率间接估计算法的估计方差比直接估计算法的方差要小2 ~3个数量级。
The variance of the frequency estimates of indirect method is 2 ~ 3 magnitudes less than that of the direct method.
本文提出了一种单因子异方差模型，导出这种异方差分析方法，并给出了模型中均值与方差的估计。
This paper presents a single factor heteroscedastic model, deduce a method of this heteroscedastic analysis, and presents the estimation of mean and variance in this model.
本文给出了集团抽样的不等概方法和均值的无偏估计，同时也给出了这种估计的方差及方差的无偏估计。
In this paper it not only gives the method of unequal probability in group sampling and unbiassedness of mean estimation and also gives the variance and its unbiassedness of estimation.
这种方法采用直接估计增益K，避免了求解系统噪声方差阵q和量测噪声方差阵r，使系统的稳定性增强。
This method estimates filter gain matrix K directly, avoids calculating system noise covariance matrix Q and measure noise covariance matrix r, it improves stability of the system.
讨论岭型主成分估计在一类降维估计中的方差性质，证明了它的方差和在这类降维估计中最小。
This paper deals with the variance property of combining ridge and principal components estimate in the class of reduced-dimension estimates.
方差-协方差分量估计公式等价性的进一步证明。
Further Broof on the Equivalence of the Formulas of Variance-covariance Component Estimation.
从半同胞协方差估计出来的，同一性状的加性遗传方差为0.9602。
The additive genetic variance of the same character, estimated from the covariance of half sibs, was 0. 9602.
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.
本文提出了一类新的协方差改进估计，并研究了这一类协方差改进估计的优良性质及其相应的两步估计的优良性质。
In this paper, we propose a new group of covariance improvement estimators, and discuss these estimators and the related two stage-improved estimators' properties and advantages.
正交设计是立足于方差分析模型的，通过方差分析来估计模型中的未知参数。
Orthogonal design which is based on variance analysis model estimates unknown parameters using variance analysis.
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.
通过附有条件的间接平差模型进一步证明各类方差-协方差分量估计公式之间的等价性。
In this paper, through the model of parameter adjustment with constraints among the parameters, a further proof on the equivalence of the formulas of variance-covariance components is gives.
当噪声的方差已知，且过程是平稳的，应用递推最小方差估计，能够增强信号。
When the noise variance is known, and it's process is stationary, the signal can be enhanced by use of the recursive least mean-square estimation.
这里的学习模型包括对于估测变量的方差估计，以及股票收益率与这个预测变量的协方差。
The learning model includes the volatility estimation of the predicative variables and the covariance of stock return and this predicative variable.
进一步的方差组分估计表明，主要经济性状的加性遗传方差较大。
The variance component analysis revealed that the ratios of additive genetic variance to phenotypic variance of the majority of economic traits were high.
将线性混合模型中随机效应的协方差阵推广为正定阵，运用方差分析估计的方法给出了方差分量的估计。
In this paper, the covariance matrix of random effect in linear mixed model is extended to positive matrix. We construct the estimation of variance components based on the idea of ANOVA estimation.
结果双变量多水平模型可以估计各水平两个变量的方差协方差阵，据此可以计算出相关系数随协变量变化的函数式。
Results Multilevel models can present the variance covariance metrics of two dependent variables in every levels, and make out the functional expresses of correlation coefficient with covariates.
噪声的方差估计是含噪图像处理中的常见问题之一，其基本思想是通过某种方法寻找含噪图像中的“纯”噪声子图像来估计原噪声方差。
Variance estimation is a common problem in noised image processing. The basic idea is to get a sub-image that includes only "pure" noise to estimate the variance of original noise.
方差估计是抽样调查的重要组成部分，重抽样方法是常用的方差估计方法。
The variance estimation is very important part in sample survey, and replicated sample method is a common method.
对含两个方差分量的一般线性混合模型，我们给出其方差分量的改进估计，主要对组合谱分解估计进行改进。
We compare the spectral decomposition estimate by the analysis of variance estimate in the linear mixed model with two variance components.
研究岭型主成分估计在降维估计类中的方差最优性，证明了它的方差阵在降维估计类中最小，方差阵的特征值最小，方差和及方差积最小。
This paper considers the classification compression principal component estimate of regression coefficient in growth curve model and proves that it is superior to least squares estimate.
重权数方法与重抽样方法类似，也是利用计算机的优势通过重复获得大量不同的子样本的重权数估计目标参数的估计量和方差估计量，是一种稳健、通用、有效的方差估计方法。
Replicate weight, which is similar with replicated sample method, gets a lot of replicated weights to obtain the estimators by computer, it is also a robust, common and effective method.
重权数方法与重抽样方法类似，也是利用计算机的优势通过重复获得大量不同的子样本的重权数估计目标参数的估计量和方差估计量，是一种稳健、通用、有效的方差估计方法。
Replicate weight, which is similar with replicated sample method, gets a lot of replicated weights to obtain the estimators by computer, it is also a robust, common and effective method.
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