查询词典 parameter estimation

The paper studies the distribution characteristics and determinants of job vacancies. The parameter estimation is based on the two-stage Tobit procedure. The main statistical results are as follows: There is a positive correlation between the hiring scale and job vacancy incidence, while there is a negative correlation between the qualification vacancy rate and the hiring scale. The higher the labor turnover rate in units, the higher the job vacancy incidences and the vacancy rates are. The 98.39% of institutions with prospects have labor needs, and 39.53% of units declining say they will hire new staff. After decomposing the Theil Index which reflects the gaps among vacancy rates, the differences among vacancy rates of different units are mainly from the inner causes of various groups, and the intergroup reasons are not main ones.

本文利用两阶段Tobit模型对国内的职位空缺统计数据进行了估计，发现：用人机构的雇佣规模与职位空缺发生率正相关，而职位空缺率则与机构的雇佣规模呈现负相关的关系；机构员工流动率越高，职位空缺发生率以及职位空缺率越高；在景气指数为"看涨"的机构中98.39%表示存在用人需求，而景气指数为"看跌"的机构里只有39.53%的机构表示会招募新员工；在对反映职位空缺率差距水平的泰尔指数分解后发现机构职位空缺率之间的不同主要是由于各类分组的组内原因导致的，而组间的原因并不是主要的。

The paper studies the distribution characteristics and determinants of job vacancies. The parameter estimation is based on the two-stage Tobit procedure. The main statistical results are as follows: There is a positive correlation between the hiring scale and job vacancy incidence, while thereis a negative correlation between the qualification vacancy rate and the hiring scale. The higher the labor turnover rate in units, the higher the job vacancy incidences and the vacancy rates are. The 98.39% of institutions with prospects have labor needs, and 39.53% of units declining say they will hirenew staff. After decomposing the Theil Index which reflects the gaps among vacancy rates, the differences among vacancy rates of different units are mainly from the inner causes of various groups, and the intergroup reasons are not main ones.

本文利用两阶段Tobit模型对国内的职位空缺统计数据进行了估计，发现：用人机构的雇佣规模与职位空缺发生率正相关，而职位空缺率则与机构的雇佣规模呈现负相关的关系；机构员工流动率越高，职位空缺发生率以及职位空缺率越高；在景气指数为"看涨"的机构中98.39%表示存在用人需求，而景气指数为"看跌"的机构里只有39.53%的机构表示会招募新员工；在对反映职位空缺率差距水平的泰尔指数分解后发现机构职位空缺率之间的不同主要是由于各类分组的组内原因导致的，而组间的原因并不是主要的。

Identification ; parameter estimation ; least squares method ; approximation ; adaptive lilter/kalman filtering

辨识；参数估计；最小二乘法；逼近；自适应滤波器/卡尔曼滤渡

Those approaches via training sequences or pilot symbols employ the correlation or the maximum likelihood function for parameter estimation.

在利用训练序列或领航符号的方法里是以接收到资料的相关性或最大概似函数来估测时间及频率偏移。

This method uses periodic sequences of different magnitudes as inputs to extract a linear subsystem so that the set theory, parameter estimation, optimization, pole zero separation, can be applied.

该方法巧妙利用不同幅值的伪随机输入信号，从原系统中离析出线性子系统。基于线性子系统的参数估计值和集合理论，提出一个零极点划分的寻优准则。

A modification strategy for parameter estimation is proposed to guarantee the uniform controllability of the estimated model and to obtain a lower bound of the controllable measure.

该算法构造了一个估计参数的修正策略，保证估计模型的一致能控性，并且得到能控度的一个下界。

Parameters estimation of the distributed parameter system and digital image restoration are representative Mathematical and Physics inverse problem, and they are explored in the first two chapters of this paper.

分布参数系统的参数辨识和数字图像恢复是典型的数学物理反问题，本文前两章分别对这两方面进行了探索研究。

Given the assumption of analysis-of-variance model, the text selection can be transformed to a linear parameter estimation problem, which can then be solved by a greedy matroid cover algorithm.

在方差分析模型的假设下，最优文本选择就转化为线性参数估计问题，相当于寻找拟阵的最小代价覆盖集，从而可通过贪心算法求解。

Furthermore, by the aid of maximin principle, we construct a model-robust optimal design for the consideration of parameter estimation.

更进一步地，我们利用小中取大原则建构一个对个别模型成立下有关参数估计问题均具稳健性质的实验设计。

A maximum likelihood method for the parameter estimation of the delay time model based on observed data is established in this paper.

介绍了基于客观数据的延迟时间模型参数极大似然估计方法，提出了应用优化理论中的单纯形法求解似然函数的算法，为延迟时间模型的参数估计问题提供了可行的解决方法。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了