Vine copula constructions of higher-dimensional dependent reliability systems

Copulas have proved to be very successful tools for the flexible modeling of dependence. Bivariate copulas have been deeply researched in recent years, while building higher-dimensional copulas is still recognized to be a difficult task. In this paper, we study the higher-dimensional dependent reliability systems using a type of decomposition called “vine,” by which a multivariate distribution can be decomposed into a cascade of bivariate copulas. Some equations of system reliability for parallel, series, and k-out-of-n systems are obtained and then decomposed based on C-vine and D-vine copulas. Finally, a shutdown system is considered to illustrate the results obtained in the paper.     

Decomposition of the main effects and interaction term by using orthogonal polynomials in multiple non symmetrical correspondence analysis

The multiple non symmetric correspondence analysis (MNSCA) is a useful technique for analyzing a two-way contingency table. In more complex cases, the predictor variables are more than one. In this paper, the MNSCA, along with the decomposition of the Gray–Williams Tau index, in main effects and interaction term, is used to analyze a contingency table with two predictor categorical variables and an ordinal response variable. The Multiple-Tau index is a measure of association that contains both main effects and interaction term. The main effects represent the change in the response variables due to the change in the level/categories of the predictor variables, considering the effects of their addition, while the interaction effect represents the combined effect of predictor categorical variables on the ordinal response variable. Moreover, for ordinal scale variables, we propose a further decomposition in order to check the existence of power components by using Emerson's orthogonal polynomials.     

Sexual orientation differences in HIV testing motivation among college men

Objective: To investigate sexual orientation differences in college men's motivations for HIV testing. Participants: 665 male college students in the Southeastern United States from 2006 to 2014. Methods: Students completed a survey on HIV risk factors and testing motivations. Logistic regressions were conducted to determine the differences between heterosexual men (HM) and sexual minority men (SMM). Results: SMM were more motivated to get tested by concern over past condomless sex, while HM were more often cited supporting the testing program “on principle” and wanting a free t-shirt. SMM and HM differed in behaviors that impact HIV risk and other demographics. However, differences in testing motivation by concern over past condomless sex or wanting a free t-shirt persisted when controlling for these demographic and behavioral differences. Conclusions: Appropriately designed HIV prevention interventions on college campuses should target SMM's distinct concern over past condomless sex as a testing motivation.     

论汉代政权对民间信仰的多重政策

民间信仰是中国传统文化的重要组成部分,也是俗文化的核心。针对民间自发形成的信仰与崇拜,汉代政权采取多重政策,或引导支持,或借鉴利用,或排斥打击,主要取决于其是否与官方信仰及主流文化相抵触,是否从根本上影响到社会秩序和百姓生产生活。不管官方态度如何,作为一种强大的民间力量,民间信仰以其特有的方式参与政治生活,与官方政权相互影响、相互补充,形成既配合又抗衡的互动局面,并以顽强的生命力传承、延续和发展。     

高校经管类学生参与科研意愿的影响因素分析——基于安徽省8所高校的问卷调查

大学生参与科研是高校培养双创型人才的重要途径之一,高校经管类专业学生培养存在重理论、轻实践的现象。安徽省8所高校1406名经济管理类学生科研意愿的实证分析表明:年级、学习成绩、科研重要性认知、科研了解程度和学校科研活动开展对大学生科研意愿有显著影响。高校在经管类学生培养过程中应通过加强科研宣传推广、开设科研训练课程、丰富科研活动多样性、激励教师科研指导和开拓校外实践教学基地建设等措施增强学生参与科研的积极性,提升学生的双创能力。     

犯罪记忆心理的可测性与局限性

中国的心理测试技术,是运用现代心理学、犯罪心理学和实验心理学原理以及神经心理学、生物电子学等研究成果,通过专用测试仪器软硬件和智能化计算机系统,同时同步记录人的多项心理生物反映指标,进而评判心理痕迹对应相关程度的实验心理技术。心理测试中心近20年犯罪心理测试的研究成果、以及经过直接参与办理全国各地600多起重特大疑难案件的实践、和经过对近万人实案测试图谱的评判分析研究,得出的结论是:违法犯罪人在经历过违法犯罪事件之后的记忆违法犯罪心理痕迹是可测的。这项技术在辅助刑侦工作方面有着很大的作用,但同样,我们也要看到它的局限性。     

论道德教育的多学科生态

道德教育是一个完整的、有机的形态,具有其生态本性。文章从此逻辑起点出发,提出道德教育研究本身具有其生态性．拘泥于某一特定学科视角局限的道德教育研究缺乏全局性的总体把握。因此,从道德教育的生态整体性出发,从伦理学、教育学、社会学、心理学等多学科视角,从支持系统、操作系统、环境系统和转化系统建构方面,全面分析道德教育,建构起多学科研究视野中的道德教育生态体系,是解决当前道德危机和德育困境的重要途径。     

企业经济责任投入对财务绩效影响的实证研究

将企业经济责任分为对股东的责任、对债权人的责任、对供应商的责任、对员工的责任,以此来设定经济责任投入的变量,分析研究其对企业财务绩效的影响。选取2011~2012年中国最受尊敬企业中在沪、深交易所上市的15家企业作为样本,根据各企业发布的相关财务数据,采用计量经济模型的方法,对财务绩效进行回归分析。结果显示：债权人、供应商、员工的责任与财务绩效均呈显著正向关系,说明企业经济责任的投人会促进财务绩效的提高。最后,提出促进企业财务绩效增长的对策建议。