对中国工笔画视觉元素写意性的理解

中国工笔画作为一种独立的画体，蕴含深厚的 文化底蕴和传统精神，但其工整，细致的画面效果难于摆脱刻板、呆滞的效应。活用其线、 色等艺术语言，增强写意成份，乃是中国工笔画发展之路。     

Lower bounds on Bayes risks for estimating a normal variance: With applications

Brown and Gajek (1990) gave useful lower bounds on Bayes risks, which improve on earlier bounds by various authors. Many of these use the information inequality. For estimating a normal variance using the invariant quadratic loss and any arbitrary prior on the reciprocal of the variance that is a mixture of Gamma distributions, we obtain lower bounds on Bayes risks that are different from Borovkov-Sakhanienko bounds. The main tool is convexity of appropriate functionals as opposed to the information inequality. The bounds are then applied to many specific examples, including the multi-Bayesian setup (Zidek and his coauthors). Subsequent use of moment theory and geometry gives a number of new results on efficiency of estimates which are linear in the sufficient statistic. These results complement earlier results of Donoho, Liu and MacGibbon (1990), Johnstone and MacGibbon (1992) and Vidakovic and DasGupta (1994) for the location case.     

A class of modified stein estimators with easily computable risk functions

Consider the problem of estimating the mean of a p (≥3)-variate multi-normal distribution with identity variance-covariance matrix and with unweighted sum of squared error loss. A class of minimax, noncomparable (i.e. no estimate in the class dominates any other estimate in the class) estimates is proposed; the class contains rules dominating the simple James-Stein estimates. The estimates are essentially smoothed versions of the scaled, truncated James-Stein estimates studied by Efron and Morris. Explicit and analytically tractable expressions for their risks are obtained and are used to give guidelines for selecting estimates within the class.     

党的历史方位与党的建设内外部条件分析

党的十六大报告对党的历史方位做出了科学判断。本文从党的历史方位角度就执政党的内外部条件进行了分析,并侧重分析了这些条件变化对党的建设提出的新课题,认为应该增强党的建设的忧患意识。     

化学镀Ni－P－B_4C合金的研究

研究了化学复合镀Ｎｉ－Ｐ－Ｂ４Ｃ合金镀液的组成、工艺和镀层性能，研究的结果表明，镀液中的Ｂ４Ｃ微粒含量在１０～１５ｇ·Ｌ－１时，能获得性能较好的镀层，且具有特别高的硬度。     

C语言的公理语义(1)──控制结构

由于篇幅的缘故，本义从公理语义的角度主要讨论了C语言的流程控制结构的语义，而关于该语言的函数和对象的公理语义将在后续的各文章中陆续给出。     

视觉电生理诊断系统微机软件的设计

视觉电生理诊断系统是眼科诊断重要的医疗设备，整个系统由微型计算机及外部设备组成．本文在分析了系统运行要求及特点的基础上，介绍了该系统中计算机软件的设计思路，并给出采用面向对象编程方法的实现方案．     

Discriminating between preference functionals: A preliminary Monte Carlo study

This article is connected with recent attempts to estimate EU and Generalised EU preference functionals using (complete ranking) experimental data and maximum likelihood estimation techniques. In particular we explore, using Monte Carlo techniques, the power of such procedures in correctly determining the true preference functional. We conclude that several of the more popular generalisations to EU are very difficult to disentangle, and that the techniques are rather poor at correctly identifying EU when it is the correct functional.     

Bandwidth selection for kernel regression with correlated errors

In this paper, we propose bandwidth selectors for nonparametric regression with dependent errors. The methods are based on criteria that approximate the average squared error. We show that these approximations are uniform over the bandwidth sequence. The criteria involve some constants that depend on the unknown error correlations. We propose a novel way of estimating these constants. Our numerical study shows that the method is quite efficient in a variety of error models.