参数估计

In this paper,a rational approximation method of the norm of parametric speed is given,which is more effective than the polynomial approximation.

文章根据等距曲线逼近的关键在于对其参数速度模的逼近，提出了对参数速度模有理逼近的2种形式，在此基础上给出了平面Bézier曲线等距曲线的逼近函数和误差估计函数，并导出了保持法矢平移方向的代数方式的等距有理逼近算法。

A data fusion algorithm is adopted to enhance the performance of auto rate selection mechanism in IEEE 802.11 based on fuzzy system theory,and with the application of this mechanism,the misjudgement of channel state which estimated by single channel parameter is eliminated.

为了提高IEEE 802.11中速率选择机制的性能，提出了一种基于多信道参数数据融合算法的自动速率选择机制，克服了采用单一参数进行信道状态估计的误差和误判。

We prove that the traditional approach of replacing parameters by their estimates will make the newsvendor away from the optimal profit level, leading to a suboptimal result. And then two revised application methods are provided.

首先考察单个零售商的订货问题，证明直接使用参数的估计量代替参数真实值的做法将使库存系统偏离最优点，之后给出两种修正方法。

This paper develops a nonparametric model of interest rate term structure dynamics based on a stochastic spot rate process and nonparametric kernel estimation.

本文在现有利率期限结构理论的基础上，利用随机过程原理和非参数核估计法，建立非参数利率期限结构动态模型。

Numerical differentiation is applied to estimate the structural parameters of measurement systems.

采用数值微分方法直接对测试系统的结构参数进行估计，可以直接得到测试系统的结构参数，具有简单明了的特点。

An improved method is used to describe non-linear characteristics of oil film.

本文提出了改进的模型，用模型中各参数随偏心率的非线性分布来反映油膜力的非线性特性，使该模型能够进一步用于转子系统进入涡动状态后的瞬态运动描述，并给出了利用差分解获得模型中各参数近似估计的方法。

Mapping ordered eigenvalue points of sample covariance matrix of the observation data onto Hough parametric space,the number of eigenvalues of noises can be estimated by detecting the peak points on Hough parametric space,and thus the number of signal source is determined.

该方法通过Hough变换将观测数据的采样协方差矩阵的排序特征值点投影到Hough参数空间，通过检测Hough参数空间中积累的峰值来估计噪声特征值的数目，从而确定信源的个数。

Simulation and experiment results show that the proposed algorithms can identify the parameters of IM exactly, and avoid the state estimation impacted by parameter variety.

仿真和实验研究表明，上述方法均能实现对电机参数的准确辨识，从而避免状态估计受电机参数变化的影响。

Prerequisites, Statistics 155, 165. Density and regression estimation when no parametric model is assumed.

非参数统计推断：平滑方法：无假定的参数模型时的密度和回归估计。

The last chapter is the parametric and bootstrapping estimation for the confidence intervals of the analyte content in the composite samples.

此外，还应用参数法和非参数法对组合样中被测组分含量的置信区间进行了估计。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新