参数估计

There are two findings summarized from previous studies:(1) the least squares estimator is a common choice of researchers, but under an unequal probability design, the estimator is biased,(2) the probability weighted estimator is consistent but may have a large variance.

过去的研究发现：(1)在不等机率抽样时，一般常用的最小平方法所得到的回归参数估计式并非不偏估计式；(2)机率加权最小平方法可以改善不偏性，然却增加估计的变异程度。

Recently many of statisticians have been interested in the functional coefficient model because of its simplifying structure, meaningful interpretation and wide application. In the chapter 2, estimators of parameters of linear functional coefficient structural model under interval-censored covariate studied.

由于协变量区间删失，为此我们创立了一个与协变量具有相同均值的变量，然后利用加权最小二乘估计法得到了变系数一维线性结构关系模型中的参数估计，当协变量的分布已知时，证明了估计的弱相合性和强相合性。

In this paper,the research on the parameter estimation of Gamma distribution with three parameters and the test of the location parameters has been made.

该文考虑了混合分布为三参数伽玛分布时的参数估计以及位置参数的检验问题。

In one embodiment, the parameter estimate is an estimate of time of arrival of the signal, and the reliability metric is root mean square error of the time of arrival estimate.

在一实施例中，参数估计是信号的到达时间的估计，可靠性度量是到达时间估计的均方根误差。

Generalized negative binomial distribution was successfully fitted to all the snail data. The parameters of GNBD from the same bottomlands in different seasons changed differently, and parameters of GNBD from different bottomlands in the same season were not similar even if their snail density were close.

不同季节同一滩地间的广义负二项分布参数的变化不一致，同一季节不同滩地广义负二项分布的参数估计结果即使在钉螺密度相近的情况下也不相近，钉螺生存环境的微小差异可以通过广义负二项分布的参数灵敏反映。

Rosenblatt and Nearest neighbors estimates are the nonparametric estimation of the probability density function.

Rosenblatt估计与最近邻估计是概率密度的两种非参数估计方法。

In Chapter 6, different from the traditional adaptive control that mainly deals with unknown parameters, nonparametric adaptive control for unknown structures is introduced by using the nonparametric estimation methods developed in Statistics.

在第6章，与传统的主要对付未知参数的适应控制不同，引进针对未知结构的非参数适应控制，其利用了统计学中发展起来的非参数估计方法。

Parameter estimate lays particular emphasis on individual population parameter of model in the past. Its common purpose aims at seeking one method to optimize parameter in the equation.

以往参数估计研究都侧重于单个种群模型中的参数确定，其共同的目的旨在寻求一种使方程中参数达到最优化的方法。

First it introduces the theory and method of information spreading estimation.

首先介绍信息扩散估计的理论和方法，然后对受到粗差污染的大坝观测数据，应用信息扩散估计方法进行线性模型的参数估计。

Focusing on the problem that the performance of channel estimation is influenced by spatial correlation in multiple input multiple output systems,a parametrical channel estimation method based on estimating multipath parameters is proposed.

针对多输入多输出系统中信道空域相关影响信道估计性能的问题，提出了一种基于多径参数估计的信道估计方法。

He and Nina moved to California and lived at 2005 Ivar Street, Apt.

他和Nina搬到加州，并在2005年伊瓦尔街，公寓生活。

Droperidol （ potently inhibits transfected HERGchannels and this is the probable mechanism for QT prolongation.

氟哌利多有效地抑制了转染的 HERG 钾通道，可能是 QT 间期延长的机制。