无偏估计

Want to think about how spread out this distribution is.This allows us to choose the best estimator among all, or at least a broad class of, the unbiased estimators.

了解这一点，将对我们如何能够在所有的估计量中，或至少在无偏估计量这一类估计量中选出最优的一个具有一定的指导意义。

For the linear model with aggregated data, this paper proposed one kinds of the relative efficiency of Peter-Karsten estimator compare to the best linear unbiased estimator.

对于聚集数据的线性模型，本文给出了Peter-Karsten估计相对于最佳线性无偏估计的一个相对效率，得到了相对效率的下界，讨论了该相对效率与广义相关系数的关系。

For noncentrality parameter matrix in noncentral wishart distribution, based on usual unbiased estimator, a series of pre-test estimators are obtained.

1对于非中心Wishart分布的非中心参数矩阵，本文基于通常的无偏估计给出了一系列的预检验估计。

The bias of cyclic periodogram with ssinc window is analyzed in both spectrum frequency direction and cycle frequency direction, and that the TA cyclic spectrum estimation is unbiased is proved.

通过分析加ssinc窗的循环周期图在谱频率方向和循环频率方向的偏差，分析了TA循环谱估计是无偏估计。

The bias of cyclic periodogram with ssinc window is analyzed in both spectrum frequency direction and cycle frequency direction, and that the TA cyclic spectrum estimation is unbiased is analyzed. The average method of cyclic periodogram is also derived in terms of STFT.

论文中通过分析加ssinc窗的循环周期图在谱频率方向和循环频率方向的偏差，表明TA循环谱估计是无偏估计，并根据STFT方法，推导了使方差得以减小的平均循环周期图方法。

It is proved that by the LS algorithm, the parameter estimated is asympototically unbiased, and a consistent estimate of true value.

并证明了本文提出的LS算法的参数估计是其真值的一致，无偏估计。

Key words: probability and symbolic statistics; linear model; parameter estimate; best linear unbiased estimate

关键 词：概率论与数理统计；线性模型；参数估计；最佳线性无偏估计

According to this,the best linear unbiased estimate method of location-scale distribution for incomplete interval censored data is presented,the confidence l.

在此基础上，针对位置-尺度分布族提出一种不完全区间数据最佳线性无偏估计方法，得到了其百分位值的置信限估计，并对工程中常见的极值分布、两参数Weibull分布、正态分布进行了详细讨论。

The estimator x/mn is more manageable and precise than the traditional unbiased estimator.

与传统的无偏估计相比，用混合样本阳性数在样本总量中的比例作为感染率估计值具有计算简单、精度较高的优点。

Upper control limit for exposure point concentration of formaldehyde was calculated by Land method based on maximum likelihood estimates and Chebyshev method based on minimum variance unbiased estimates, and UCL values were 35.18 mg/kg and 41.82 mg/kg, respectively.

采用最大概似估计的Land方法及最小方差无偏估计的Chebyshev方法计算得到甲醛暴露点浓度控制上限，分别为35.18、41.82 mg/kg。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。