Characterizations of gamma,inverse Gaussian,and negative binomial distributions via their length-biased distributions

A general form for characterizing inverse Gaussian and Wald distributions, based on their respective length-biased distributions, is introduced. Further results for characterizations of the gamma distribution, the negative binomial distribution and some mixtures of them by using their lengthbiased distributions are establised.     

博弈论在寡头垄断下环境污染税收的应用

文章基于博弈理论,阐述寡头垄断条件下环境污染税收的不完全信息静态博弈Cournot模型和不完全信息动态博弈Stackelberg模型,得出了一些新的结论.     

Premarital Cohabitation and Housework: Couples in Cross‐National Perspective

The authors examine the effect of premarital cohabitation on the division of household labor in 22 countries. First, women do more routine housework than men in all countries. Second, married couples that cohabited before marriage have a more equal division of housework. Third, national cohabitation rates have equalizing effects on couples regardless of their own cohabitation experience. However, the influence of cohabitation rates is only observed in countries with higher levels of overall gender equality. The authors conclude that the trend toward increasing cohabitation may be part of a broader social trend toward a more egalitarian division of housework.     

'Making Culture Matter': Symbolic,Spatial and Social Boundaries between Uyghurs and Han Chinese

This article illustrates how Uyghurs in the 1990s defined and reinforced contemporary Uyghur national identity in relation to Xinjiang's growing Han Chinese population. Adopting Barth's theory of fluid and negotiable ethnic boundaries, it focuses on the notion of change. While Uyghurs are currently activating and exaggerating certain religio-cultural differences--in particular the avoidance of pork--as a means of ensuring symbolic, spatial and social segregation from the Han, those criteria did not prevent interaction to the same extent in the past; nor do they prevent Uyghurs from making concessions when it benefits them to do so. It is argued that it is not religio-cultural differences per se that lie at the root of increased tensions between Uyghurs and Han Chinese, but changing social, political and economic contexts: on the one hand, growing Uyghur perceptions of socio-economic inequalities between themselves and the Han (the 'internal factor') and, on the other, the vast changes within the international political arena since the late 1980s (the 'external factor').     

技术MBA培养方式探讨

1994年美国首先出现了“技术MBA”的学位教育。技术MBA教育在美国一出现便倍受各公司和企业的欢迎 ,其毕业生大受青睐。本文讨论了技术MBA的特色以及与传统MBA教育的联系和区别 ,介绍了美国开展技术MBA教育的经验 ,最后在师资、教材、教学方法和实践技能的培养四个方面探讨了我国开展技术MBA教育所面临的问题     

实践是认识主体性产生的现实根源

本文以皮亚杰“发生认识论”的基本思想为线索 ,根据辩证唯物主义基本原理 ,阐述了实践的基本性质 ,并对库恩的“范式”理论进行了简要的剖析 ,论证了实践是主体认知定势建构的现实桥梁和中介 ,因而也是认识主体性产生的现实根源     

人工冻土冻胀及其抑制研究述评

人工冻结冻施工技术是岩土工程尤其是特殊地质和工程条件下地下工程施工的重要方法之一，但冻胀现象制约了该方法的推广应用。从人工冻土冻胀的影响因素、物理模拟概况、数值模拟现状及冻胀抑制等方面总结归纳了国内外在冻胀及其抑制上的研究成果。     

历史教学中的思想政治教育失落与重建

升学主义的误导以及忽视学生思维独立性与批判性的填充式教学,造成了历史教学中思想政治教育的失落困境,其重建任重道远。订立明确、具体、简洁的思想教育目标应该先行,再运用情理合一、悬念例证、逆向思维、引发争议、对症下药、浅者深掘等渗透教育手段、创造有利于思想政治教育的民主课堂。     

Self-defense training for college women.

This article explores the effectiveness of self-defense training for college women. Advocates of self-defense training believe these courses will not only provide women with the physical survival techniques necessary to repel attacks effectively, but that this kind of training will also help to prevent future violence by developing traits such as assertiveness and confidence in individuals. There is evidence that women who convey such characteristics are less likely to be victimized. Opponents argue that self-defense training does not properly prepare women for an attack, does not adequately address acquaintance rape threats, and can provide a dangerous false sense of security to students. This article reviews the relevant literature, outlines practical suggestions for initiatives in this area, and describes a model self-defense course at one university. Guidelines for evaluation and implications for university policy and program decisions that address violence against women on college campuses are included.     

关于二次量子化方法计算的一些技巧

从费来子和玻色子的基本对易关系出发,给出二次量子化方法的几个技巧,可简化二次量子化的计算