查询词典 efficient estimator

The line transect method and Fourier series estimator based on perpendicular distance were fitted to the census.

应用线路统计并采用傅立叶级数模拟探测概率函数的方法估算黄腹角雉的种群密度较为准确。

In order to think about unbiasedness, we need to rewrite our estimator in terms of the population parameter

为了考虑无偏性，我们需要用总体的参数改写

The proposed estimator is product of a sub-band adjustable factor and a power mean factor.

该文提出的估计子是一个子带自适应因子和一个β次幂均值的乘积。

Furthermore, we solve the user equilibrium problem by gradient projection method to obtain some additional path-based information. Since true OD trip demands are unknown, we conduct OD demand estimation and OD demand covering rate verification by the least square estimator.

在求解使用者均衡之交通量指派问题上，透过梯度投影法(Gradient projection， GP)求解，并获得以路径为基础的相关资讯；在流量倒推旅次起迄量的课题上，由於真实OD量未知，故使用基本的最小平方估计量，进行旅次起迄需求涵盖量的推估与检验。

Some improvements for the mean square errors of the ratio estimator are presented.

改进了比率估计的均方误差，给出了偏差的价为 1/n3 的比率估计量均方误差及其估

Based on the proportion estimate and the mean estimate in sampling technology,the authors of this paper put forward the method of ratio estimator in sampling technology and makes a detailed analysis of method.

在抽样技术比例估计与均值估计的基础上，提出了抽样技术的比率估计法，并对其作了详细的分析，同时，通过具体问题的讨论，说明了比率估计法所具有的优越性；针对各个样本比值有比较大的差别时所产生的不稳定性，运用聚类分析的方法提出了具体的比率估计法的改进公式，减少了噪声数据的影响，得到了较高的准确度。

Analytical variance of the estimation declines linearly by increasing the bit signal-to-noise ratio for the proposed channel estimator.

理论分析结果表明，该算法的对数估计方差随比特信噪比的增加而线性减小。

To solve the problem of instability when the ratio of samples differ greatly,an improved formula for the method of ratio estimator is put forward by means of clustering,which can reduce the ef.

在抽样技术比例估计与均值估计的基础上，提出了抽样技术的比率估计法，并对其作了详细的分析，同时，通过具体问题的讨论，说明了比率估计法所具有的优越性；针对各个样本比值有比较大的差别时所产生的不稳定性，运用聚类分析的方法提出了具体的比率估计法的改进公式，减少了噪声数据的影响，得到了较高的准确度

Simple random sampling, two-phase sampling, auxiliary information, ratio estimator

| 简单随机抽样；二相抽样；辅助信息；比估计

The mean square errors and estimated mean square errors for the ratio estimator with bias of order 1/n 3are given.

改进了比率估计的均方误差，给出了偏差的价为 1/n3 的比率估计量均方误差及其估

He became prime minister in 1997 and won international acclaim for his role in the Northern Ireland peace process.

他在1997年成为总理，并且因为在北爱尔兰的和平进程中发挥的作用受到国际社会的赞许。

Mixed Page Sorting Method Using the cuttable user model, this thesis proposes a mixed page sorting method by using cutted user model in server-side and complete user model in client-side.

隐私分级利用的混合式页面排序方法针对个性化搜索中搜索结果排序的问题，本文利用隐私可控开放的用户偏好模型，提出一个在客户端和服务器端分步进行的隐私分级利用的混合式页面排序方法。