最佳估计值

实证结果得出，传统的股指期货套期保值模型在应用中确实存在着缺陷，在不符合OLS假设情况下，简单线性回归得到的回归系数并不是最小风险套期保值比率的最佳估计值。

Empirical results is that OLS model has that defects in application . Therefore , the regression coefficient of the simple linear regression is not the best estimate of the minimum risk hedge ratio in the case of not meeting for the OLS assumptions .

这种方法过于繁琐，且不易找到参数的最佳估计值。

The method is excessively fussy and difficult to find the best estimate value .

新方法中将LMS算法中的各步权增量向量旋转后放至同一平面，在此基础上利用凸函数外推法求出计算步长的当前最佳估计值。

In the new method the increment of the weights vector in previous steps was rotated and placed to a plane , then the extended method for a one variable convex function was used .

此公式的基本假设是将图像和噪声看成为平稳随机过程，从Bayes公式出发，求条件概率的最大值，对应找出原始图像的最佳估计值作为复原图像。

The formula is based on the Bayes rule and the ( assumption ), that the signal and noise are stationary random processes . The optimal estimation of original image is determined from the acquired image data while the conditional probability is maximized .

在依据先验知识确定解空间的大小、位置和搜索策略后，可较快地获得参数的最佳估计值。

After determining solution-space size , location and search strategy according to some apriori information , the SSS method can be used to compute the optimal parameters rapidly .

本文中将最佳估计值定义为一种参数集，由该参数集可以算出与地震实际资料最佳拟合的合成地震记录。

Defining the best assessing value to be a kind of parameters set , it is simulated that the synthesized seismic records are the most fit to those which were recorded in fields .

实时状态估计通过数据处理技术，滤除实时量测数据误差，获得最接近于系统真实状态的最佳估计值，量测数量、质量以及配置情况都会影响状态估计的性能。

The SE can filter the measurement error by data processing , and gain the best estimation of the power system state . The quantity , quality and placement scheme of the measurements influence the SE performance .