参数估计

Langbianensis tree species in Yunnan Province was established by means of nonparametric Kernel Density Estimation method.

以建立云南思茅松林树高曲线模型为例，在分析最小二乘估计存在缺陷的基础上，采用非参数核密度估计建立树高曲线模型。

For a well-posed initial value problem of PDE, this paper estimates the values of its unknown functions on the initial surface with the kernel method in nonparametric regression analysis to deal with the data collected at different time and different positions.

对于一个适定的偏微分方程组广义初值问题，该文利用非参数回归分析中的核估计方法，对在不同时间和不同空间记录下的数据进行整合，估计出未知函数在初始曲面上的值。

Two kinds of DPA estimators are given by way of Nonstandard Analysis andprobability parameter sampling,respectively.One kind of DPA algorithm,based on a sample pathof GI/GI/l system,can estimate simultaneously EST and expected busy period length gradient.

分别从非标准分析和概率参数抽样方式的角度建立了两类DPA估计量，特别地，前一类DPA估计量可以同时估计顾客的期望系统时间和忙期期望长度的梯度。

The model is applied to predict the total amount of Chinese population,and the results show that nonparametric regression model is better than linear regression model,at the same time,the situation orthogonal sequence estimate is superior to k-near neighbour estimate for the dynamic relation between the total amount of Chinese population and nation...

并应用此模型对我国1952—2003年的人口总量和GDP总量进行了预测分析。结果表明：非参数回归模型优于线性回归模型，同时正交序列估计效果也优于k-近邻估计。

Case one: ignoring atmosphere resistance, the impact point is estimated using the ellipse theory with the data of angle measurement . Case two: considering atmosphere resistance, the coefficient of missile trajectory is estimated by EKF and the impact point is estimated using missile's dynamic model.

忽略大气阻力，根据椭圆理论，利用自由飞行段所获得的弹道参数信息估计导弹落点；考虑大气阻力，通过滤波手段得到导弹的弹道系数，再利用导弹的动力学模型递推精确估计导弹落点。

A point estimate may be the researcher's best guess at the population value, but, by its nature, it provides no information about how close the estimate is "likely" to be to the population parameter.

点估计本身并不能告诉研究者该估计值和总体参数的距离到底有多近。

We use β likelihood estimation instead of maximum likelihood estimation to estimate the parameters of data's probability distribution function (modeled by Gaussian mixture models).

在确定数据所服从分布的密度函数的参数时，使用β似然估计来代替原模型中的最大似然估计。

In this paper, we take full advantage of MATLAB statistic tool box to achieve the multivariate nonlinear regression model. Estimate of the unknown parameters. examples are used to validate the method is effective.

文章充分利用MATLAB统计工具箱的优势，通过程序的实现，对多元非线性回归模型的未知参数的估计方法以及对估计后的模型预报做出研究，并以实例验证了该方法的有效性。

A simulation study is conducted to compare the performance of the naive estimator and the regression calibration estimator.

本文也提供回归口径校正法来估计回归参数，及提供此校正估计法的大样本特性。

The result shows that the parameters in the RTT estimating modal are changing as time and self-adapted, so it can track RTT quickly and dynamically. The improved RTO arithmetic solves the problems that how to select wrap and weight when the sampling rate is high and the sender has a heavy loading.

结果表明：RTT估计模型中的参数是时变的，并且是自适应的，因此能迅速而又动态地跟踪RTT；改进的RTO估计算法解决了采样率高、发送方负载大时，偏差权重的选择等问题。

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