无偏估计

Db8 wavelet and the soft threshold based on Steins Unbiased Estimate of Risk are used to smoothly denoise.

为进一步提高局部放电信号的提取精度，采用Db8小波及无偏似然估计阈值规则进行平滑去噪。

The optimal thresholds and neighboring window sizes are determined for every subband in the wavelet domain using Stein's unbiased risk estimate, and NeighShrink is also extended from orthogonal wavelet transforms to dual-tree complex wavelet transforms in this paper.

该文运用Stein的无偏风险估计，在小波域每一个子带为NeighShrink方法确定一个最优的阈值和邻域窗口，并将NeighShrink方法从正交的小波变换推广到对偶树复数小波变换。

The results from an example showed that the unbiased estimate of error variance could be obtained so that polygenic variance and polygenic heritability could not be underestimated. Moreover, the AIC values by using the average of two replications were less than that by using the observations of a replication.

在试验设计为重复内分组随机区组设计时，通过甘蓝型油菜初花期的遗传分析表明：这种方案的试验误差方差估计值无偏性好，可避免多基因方差和多基因遗传率被低估；重复观测值平均数的分离分析的AIC值低于利用单一重复资料的AIC值。

Under assumptions MLR.1 through MLR.4, the OLS estimators are unbiased estimator of the population parameters, that is

在假定MLR.1～MLR.4下，OLS估计量是总体参数的无偏估计量，即

To explain the computable of correlated noise attenuation by wavelet analysis; to give adaptive wavelet shrinkage algorithm on basis of threshold. We discuss three thresholds'choice; namely eigenvalue, unbiased risk estimator and hitograph method. We give comesponding experiments'analysis and comparison. It shows that our method is reliable.

阐述了小波分析去相关噪声的可行性；给出了基于阀值的自适应小波收缩法，讨论了三种阀值的选取；论述了特征值法，无偏的风险估计与直方图法，给出了相应的实验分析与比较，说明了该方法是可行的。

In this paper,the author analyzes the shortcomings of the traditional method of the sta-tistical treatment of radar data for the accuracy evaluation by flying and derives an unbiased estimator s and its accuracy estimating formula of standard deviation σunder the limited distribution startig from Bessel s formula.

分析了传统雷达精度校飞数据统计处理方法的缺陷，并从Bessel公式出发，导出了σ在极限分布下的无偏估计量S′及其精度估计公式，进而提出了雷达校飞数据统计处理的改进方法，最后给出了一个计算实例。

Under CLM, OLS is not only BLUE, but also the minimum variance unbiased estimator, that is, among linear and nonlinear estimators, OLS estimator gives the smallest variance.

在经典线性模型假设下，OLS不仅是BLUE，而且是最小方差无偏估计量，即在所有线性和非线性的估计量中，OLS估计量具有最小的方差。

Results Simulation study shows that parameters estimations are approximately unbiased in MCMC when large sample size.

结果 模拟研究表明大样本时MCMC法可得到近似无偏的参数估计。

There is no effect on the unbiasedness of the OLS estimators.

过度设定对我们的参数估计没有影响，OLS仍然是无偏的。

We begin by establishing the unbiasedness of OLS estimators under a set of assumptions.

首先，我们在一些假定下证明OLS 估计量的无偏性。

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。