PSS码词组输入法及教学实践

本文介绍了PSS码（拼音、声调、首笔码）汉字输入法的词组编码及输入方法,并总结了PSS码作为一门选修课的教学效果。     

A gender comparison of HIV and drug use across the rural-urban continuum

Despite the central role of women drug users in escalating AIDS statistics, there is still a limited number of studies that examine the roles of gender and drug use type in HIV seroprevalence. This lacuna in the research literature has led to significant gaps in researchers' understanding of how and to what extent women may differ in their drug-using and HIV risk behaviors compared to their better-studied male counterparts. This study, derived from a sample of 3,555 out-of-treatment drug users residing in three South Florida urban and rural communities, attempts to compare the drug usage and needle and sexual risk behaviors of male and female drug users that put them at risk for HIV infection. The overall seropositivity rate for women drug users was 26.5% compared to 19.5% for their male counterparts. Results of multivariate analyses indicate that females compared to males were 1.4 times more likely to be HIV seropositive. Risk behaviors associated with this elevated seropositivity include living arrangements, homeless status, drug use, sexual trading behaviors, and history of STDs. Furthermore, there was a strong linear relationship between drug use type and HIV seroprevalence among women drug users. Compared to those who were neither crack smokers nor injectors of illicit drugs, those who were crack smokers only were 2 times more likely to be HIV seropositive, while those who were both crack smokers and injectors were 5 times more likely to be HIV seropositive, and those who were injectors only were 6 times more likely to be HIV seropositive. These findings indicate that among women, drug abuse and its associated risk behaviors, increase the vulnerability of this population for HIV and thus render them an extremely important priority population on which to focus HIV prevention and public health efforts and programs.     

航空工业上市公司资本结构影响因素的实证分析

股权结构、盈利能力、企业规模以及股权集中度是影响我国航空工业上市公司资本结构优化配置的主要因素,而成长性、非负债避税对公司资本结构不具有显著影响作用。航空工业上市公司应适当“减持”国有股;注重资本融资理性化,提高负债融资之比重;实行产业化、规模化是促进其资本结构优化配置的有效措施。     

高管层团队人口特征与公司业绩关系的实证研究

以沪深两市156家上市公司为研究样本,考察了我国企业高层管理团队人口特征与组织绩效之间的关系。研究发现,我国上市公司高管人员管理背景的多样性和平均年龄对企业业绩有显著的促进作用,但高管团队平均学历水平及学历水平的差异性对企业业绩的影响不显著。     

民族历史构建与现实社会因素(续)

保安族在50年代被正式识别为一个民族,对其族源曾有多种观点。但是在建国50年后,保安族的历史和族源观被再次重构,这个过程既反映了现实民族关系对历史书写的映射,也反映了民族精英在历史重构中的能动性。对保安族的这个实例的分析可以帮助我们更深刻地认识现实社会因素能够如何影响民族历史的构建,这个案例所反映出来的族群历史建构模式对于研究我国的"民族历史建构和族群群体的认同结构也颇具启发意义。     

论近代甘宁青皮毛贸易发展的影响性因素及特点

本文立足于对甘宁青近代皮毛贸易发展历程的前期研究,从时代环境和国内外市场需求、区域政治环境和贸易政策及民族和交通状况三方面剖析了影响其发展的主要因素,进而对皮毛贸易发展中所表现出的特点作了较为细致的阐述。     

论北宋天圣年间四川仕风的嬗变——三苏文章汇入北宋古文运动的地域背景

北宋天圣以前川民「怀土罕趋仕进」。天圣以后,「应时务用」的观念成为了时代的主导观念,因而促成了「通经学古,以西汉文词为宗师」的蜀学汇入时代的主流。这是三苏文章与欧阳修古文革新思想合拍的重要背景。     

基于VaR风险控制的半log-最优资产组合模型

通过建立基于VaR风险控制下的单周期半log-最优资产组合数学模型,证明了最优解的存在性与唯一性。利用遗传算法对半log-最优资产组合模型进行了实例计算与分析,并与log-最优资产组合模型进行了比较,结果表明半log-最优资产组合模型具有计算方便的特征。     

数字电视视频压缩标准

简述MPEG、JPEG与H系列图像压缩编码国际标准中与高清晰度数字电视视频相关的编码技术,并指出各自的特点、性能与应用。     

我国经济转轨时期寻租的因素分析

本文从不完全信息静态博弈的角度,对寻租问题进行了博弈分析。通过分析,从理论上揭示了博弈双方的行为动机及博弈均衡结果,说明在给定的制度安排下,各个行为主体追求自身收益最大化的结果会导致寻租的概率与政策性租金的数额正相关,与寻租行为被举报或案发的可能性以及对寻租的惩罚力度负相关。并在此理论框架基础上,阐述了我国经济转轨时期寻租泛滥的制度及微观经济因素。