A Comparison of Partially Adaptive and Reweighted Least Squares Estimation

The small sample performance of least median of squares, reweighted least squares, least squares, least absolute deviations, and three partially adaptive estimators are compared using Monte Carlo simulations. Two data problems are addressed in the paper: (1) data generated from non-normal error distributions and (2) contaminated data. Breakdown plots are used to investigate the sensitivity of partially adaptive estimators to data contamination relative to RLS. One partially adaptive estimator performs especially well when the errors are skewed, while another partially adaptive estimator and RLS perform particularly well when the errors are extremely leptokur-totic. In comparison with RLS, partially adaptive estimators are only moderately effective in resisting data contamination; however, they outperform least squares and least absolute deviation estimators.     

我国区域刑事法律冲突初探

我国各民族之间的差异、民族区域自治制度及其自治权的存在是我国区域刑事法律冲突产生的基本原因,而通过制定顾全大局、兼顾特别的变通性、补充性刑法规范,可缓解这一冲突;通过加快少数民族地区的发展步伐,逐步消除民族之间的政治、经济、文化上的差距,进而达到彻底消除这一冲突,实现法制统一的良好局面。     

网络文学与文学本质

网络文学的出现再次激起我们对“文学本质”的追问。网络文学文本的生存形式从一个全新的层面给我们提供了一个较全面关照和认识文学 (及其传统 )的视角 ,只有以开放的心态和宽容的态度面对文学现实本身 ,我们才能更清楚地看清文学自身的逻辑 ,从而更接近和理解文学的本质。     

Sources of family violence

This paper suggests a direction for the exploration of the causes of family violence. Explanatory models of family violence were considered in this regard, with the recommendation that a multi-determined model should be considered to ensure the most accurate explanation. We suggest that family violence will be best understood and prevented or alleviated, if a model is used that considers the interaction of structural violence and the personality features of all the family members.     

论"入世"后的职务犯罪及其防治

我国“入世” ,经济运行环境和行政管理模式将发生变化。关税减让、政务公开 ,减少了职务犯罪的机会 ;贸易自由、审批权集中 ,增大了职务犯罪的可能性。减少由“入世”给防治职务犯罪带来的消极影响 ,其根本措施仍是继续坚持“教育是基础 ,法制是保障 ,监督是关键”的方针 ,打防结合 ,标本兼治     

Contre-exemple au théorème de P.C. Consul sur la factorisation des distributions de Poisson généralisées

This note exhibits two independent random variables on integers, X₁ and X₂, such that neither X₁ nor X₂ has a generalized Poisson distribution, but X₁ + X₂ has. This contradicts statements made by Professor Consul in his recent book.     

Sampling Strategies for Toxic Air Contaminants

Annual concentrations of toxic air contaminants are of primary concern from the perspective of chronic human exposure assessment and risk analysis. Despite recent advances in air quality monitoring technology, resource and technical constraints often impose limitations on the availability of a sufficient number of ambient concentration measurements for performing environmental risk analysis. Therefore, sample size limitations, representativeness of data, and uncertainties in the estimated annual mean concentration must be examined before performing quantitative risk analysis. In this paper, we discuss several factors that need to be considered in designing field-sampling programs for toxic air contaminants and in verifying compliance with environmental regulations. Specifically, we examine the behavior of SO2, TSP, and CO data as surrogates for toxic air contaminants and as examples of point source, area source, and line source-dominated pollutants, respectively, from the standpoint of sampling design. We demonstrate the use of bootstrap resampling method and normal theory in estimating the annual mean concentration and its 95% confidence bounds from limited sampling data, and illustrate the application of operating characteristic (OC) curves to determine optimum sample size and other sampling strategies. We also outline a statistical procedure, based on a one-sided t-test, that utilizes the sampled concentration data for evaluating whether a sampling site is compliance with relevant ambient guideline concentrations for toxic air contaminants.     

社会认知经典研究述评

社会认知是指个人对他人或自己的心理与行为的感知与判断的过程。从 1 93 0年代开始 ,社会心理学家就已经对此问题开展研究。 1 947年 ,J.S .Bruner在以往研究基础上 ,提出了社会知觉概念 ,并且进行了相关实验 ,开启了现当代社会认知研究的大门。 1 970年代后 ,社会认知研究开始广泛借鉴认知心理学的理论和方法 ,尤其受到信息加工理论的深刻影响 ,开展了大量的实证研究。文章在把握社会认知研究的历史脉络基础上 ,评述几个在社会认知研究发展史中占有重要地位的经典研究。     

领导愿景与企业绩效关系研究

领导者的前瞻性愿景对组织发展具有重要作用。本文用访谈和问卷调查的方法对国有和民营企业的领导愿景与企业经营业绩之间的关系进行了探讨。结果发现,领导愿景及愿景共享等因素对企业绩效具有直接影响作用。研究者在此基础上提出了建立共同愿景以及培养和选拔企业愿景式领导的对策和建议。     

如何完善我国国家审计职责的探讨

近年来,我国社会主义市场经济体制的建立和完善,权力制约机制的建立与加强等都对国家审计有了更高的要求,国家审计也应根据我国审计环境的发展,从完善国家审计法律法规、加强国家审计机关及人员监督等方面入手,进一步完善我国国家审计职责、职权,以更好地为国家经济发展服务。