非参数估计

For fitting ROC curves and getting the area under the ROC curve, we applied the parametric methods of binormal models and ordinal regression models, the semiparametric method of Cox proportional hazards model, the nonparametric methods of Hanley, Delong.

本文采用双正态模型、有序回归模型等参数法，Cox比例风险模型半参数法，Hanley、Delong非参数法拟合了ROC曲线；文中也考虑了样本量的估计、协变量的混杂效应、再抽样技术计算ROC曲线下面积的标准误与可信区间等问题；并研究了SROC分析方法。

When it comes to the non-parameter density estimation technique for characterizing the region feature distribution, it also takes the collective distribution into consideration because of inaccurate segmentation.

此外，在应用非参数密度估计技术来构造语义类的特征分布时，针对区域分割的不精确性，该文还考虑了区域特征空间的总体分布因素，进而对区域的后验分布进行更可靠地估计。

Under the assumptuion that the lower bound of the density of the observed nonlinear AR (1) time series is known, we prove that the nonlinear wavelet estimator of the conditional mean function g, which is similiar with the one introduced in Chapter 2, still has the same good adaptive properties for this kind of nonlinear AR (1) series on account of the moment inequalities and exponential type inequalities for strong mixing processes.

在假设观测序列的的密度函数的下界已知的条件下，我们利用关于强混合过程的矩不等式以及指数型不等式证明了类似于上一章的小波估计对于非线性AR（1）模型中条件均值函数的非参数函数估计仍然具有优良的自适应性质，并同样给出了数值模拟的结果分析。

It is convenient that we use appropriate likelihood function.

本文对h是非参数情形试图用一个分段线性函数来逼近它，这样把非参数变成参数问题，从而求参数的极大似然估计。

Furthermore, the kernel density estimation, a nonparametric method, is used to estimate the density functions of natural logarithm of average cost per stay and average days of inpatient.

此外，本文将非参数模型中的核密度估计方法应用于每次住院费用对数和每次住院天数对数的分布研究中，并用它进一步估计了每次住院费用和每次住院天数的均值和方差，取得了较好的效果。

The objective of this paper is to analyze medical expenses records of a group in a year. The Kernel Density Estimation, a nonparametric method, is used to estimate the density function of natural logarithm of medical expenses amount. Then the estimated density function is used to estimate the means and variances of medical expenses amount spent by the inpatients per time.

本文研究了某团体一年的住院医疗费用记录，运用非参数模型中的核密度估计方法，对每次住院费用对数的分布密度进行了估计，并用它进一步估计了每次住院费用的均值和方差，取得了较好的效果。

In [1], the kernel method of nonparametric density estimation is used to estimate the score functions directly.

文献[1]利用非参数法概率密度函数估计的核函数方法，通过对源信号评价函数的直接估计，提出了一种基于概率密度函数估计的DEBBBS算法，成功地解决了非线性函数替代方法存在的不能分离杂系混合信号的问题。

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。

This paper adopts parametric method, semiparametric method and nonparametric method to estimate the VaR of the futures market.

本文分别采用参数法、半参数法与非参数法来估计铜期货市场的风险值。

Empirical likelihood is a nonparametric statistical method used to construct confidence regions for multivariate means,and more generally,for parameters defined by estimating equations.

经验似然是一种非参数统计方法，用于对多元均值参数和更一般地，由估计方程定义的参数，构造置信域。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。