To prove that ols estimators are asymptotically efficient , one needs to ( 1 ) present an estimator that is consistent but its variance is larger 为了证明ols估计量是渐近有效的，我们需要( 1 )给出一致的估计量但证明它有更大的方差。
Are defined . moreover , their weak consistency , strong consistency and asymptotic normality are proved . the second part : when { i } is an i . i . d 定义了， g ( ? )的小波估计量，并证明了它们的弱相合性，强相合性和渐近正态性。
If we are presented with an estimator that is both linear and unbiased , then we know that the variance of this estimator is at least as large as that from ols 如果有人向我们提出一个线性无偏估计量，那我们就知道，此估计量的方差至少和ols估计量的方差一样大。
The necessary and sufficient conditions of some kinds of pickands estimators asymptotic to normality had been derived in this paper under some general conditions 本文系统地研究了几类pickands估计量的渐近性质，在较弱的条件下得到了它们渐近正态分布的充要条件。
This paper presents new estimator for the symmetric distribution function . it is shown that the estimator performs better than the estimator fn ( x ) in bibliography [ 1 ] 摘要针对未知对称分布函数提出新的非参数估计量，并证明了此估计量一致优于文献[ 1 ]给出的估计量。
The estimating value and variance of identified submarine dimension with torpedo were given and analyzed by computer simulation at different attack conditions 最后通过计算机仿真给出在不同攻击条件下，鱼雷对潜艇目标进行尺度识别的估计量、估计方差并进行相应的分析。
Results show that the proposed weighted regression calibration method is the most efficient and that the standard errors estimated using a bootstrap procedure are satisfactory 对于参数估计量的标准差，我们则是利用拔靴法来估计，其结果的表现也与模拟的标准差很接近。
Results show that the proposed weighted regression calibration method is the most efficient and that the standard errors estimated using a bootstrap procedure are satisfactory 对于参数估计量的标准差，我们则是利用拔靴法来估计，其结果的表现也与仿真的标准差很接近。
When > 0 , and the independent variables are positively correlated over time , the second term is positive , so the usual ols variance underestimates the true variance of the estimator 当> 0 ，而且自变量在时间上是正相关时，第二项为正，因此通常的ols方差低估了估计量真实的方差。
It is proposed that a new estimator of the extreme - value index when it is negative that is similar in form to the pickands estimator . its consistency and asymptotic distribution is established 提出一类极值指数为负时的相似于pickand s型的新的极值指数估计量，并建立它的相合性及渐近分布。
