自立养老:不可或缺的养老资源

新世纪是一个人口老龄化的世纪 ,仅靠家庭和社会难以承担起养老的重任 ,必须充分挖掘老年人自身的养老潜能 ,实行自立养老。当前自立养老方面遇到的困难和问题 ,需要得到社会各界的广泛关心和支持 ,并采取切实可行的政策和措施加以解决     

中国股票市场多标度幂律特征和临界现象

本文对上海证券交易所综合股价指数(SSECI)收益率多标度条件下的分布特征和临界现象的研究发现,收益率分布的中心部分服从Lévy分布,尾部近似对称分布,依幂律衰减,负尾的衰减略高于正尾,整体衰减远超出Lévy律0<α<2的范围,也高于成熟市场α≈3的水平。此外,上证综指收益率在多标度条件下还表现出临界现象,在标度△t>4days时渐进收敛于正态分布,成熟市场△t≈4days的临界值对中国市场具有普适性。     

热能与动力工程专业课程设计教学改革的探索与实践

介绍了我院热能与动力工程专业课程设计的教学改革和实践。提出并实现了在专业课程设计中基于大工程观念引入计算机辅助设计技术 ,培养学生达到掌握现代工程设计方法、综合运用理论知识分析解决大工程实际问题和在工作中相互协调与合作的能力的目标     

图书出版质量与"三审制"

从实行"三审制"的方法入手,论述了"三审制"对提高图书质量的保证作用.     

投资基金绩效非参数检验及实证分析

采用非参数随机折扣因子方法评价了基金条件性绩效,这种方法除了市场无套利的假设,不需要特殊的假设限制,并且根据信息变量(成交量)能够正确评价采用动态策略的基金绩效,从而能更好的了解中国基金绩效的特点.     

易学研究的新进展——千古《洛书》、《河图》与八卦关系的揭示

依据历史唯物论观点,把握我国远古无文字时期主要以图形与形象化数描述事物的基本特点,用图示形式分别论证《洛书》、《河图》与伏羲八卦的关系,揭示中华文化起源问题上的千古之谜。     

A Diagnostic Tree for Improving Production Line Performance

Improving performance of production systems is a critical but often unstructured activity. To help managers convert ad hoc or trial & error improvement efforts into efficient and systematic reviews, we develop a diagnostic tree which decomposes a performance improvement objective into successively more concrete sub‐objectives and finally into potential improvement strategies. Based on principles from the Operations Management literature, this tree is structured to enable a non‐specialist to better understand the links between corrective actions and performance. It also provides an important foundation for a principles‐based knowledge management system that couples the decision tree with a search engine for locating relevant documents within an intranet.     

正确把握党的执政能力建设的指导思想和原则

加强党的执政能力建设,必须坚持以“三个代表”重要思想为指导,以密切党和人民群众的血肉联系为核心,以促进国家的全面发展为检验标准,以建设高素质干部队伍为关键,以加强党的基层组织和党员队伍建设为基础,以改革和完善党的领导体制和工作机制为重点。     

Analysis of two-phase sampling data with semiparametric additive hazards models

Under the case-cohort design introduced by Prentice (Biometrica 73:1–11, 1986), the covariate histories are ascertained only for the subjects who experience the event of interest (i.e., the cases) during the follow-up period and for a relatively small random sample from the original cohort (i.e., the subcohort). The case-cohort design has been widely used in clinical and epidemiological studies to assess the effects of covariates on failure times. Most statistical methods developed for the case-cohort design use the proportional hazards model, and few methods allow for time-varying regression coefficients. In addition, most methods disregard data from subjects outside of the subcohort, which can result in inefficient inference. Addressing these issues, this paper proposes an estimation procedure for the semiparametric additive hazards model with case-cohort/two-phase sampling data, allowing the covariates of interest to be missing for cases as well as for non-cases. A more flexible form of the additive model is considered that allows the effects of some covariates to be time varying while specifying the effects of others to be constant. An augmented inverse probability weighted estimation procedure is proposed. The proposed method allows utilizing the auxiliary information that correlates with the phase-two covariates to improve efficiency. The asymptotic properties of the proposed estimators are established. An extensive simulation study shows that the augmented inverse probability weighted estimation is more efficient than the widely adopted inverse probability weighted complete-case estimation method. The method is applied to analyze data from a preventive HIV vaccine efficacy trial.     

不同权力结构下供应链企业社会责任激励

本文以单个供应商和单个零售商组成的两级供应链为对象,假设仅考虑供应商对产品安全方面的社会责任,研究了在供应商主导和零售商主导两种权力配置模式下,供应商履行社会责任程度的差异,以及如何在供应商和零售商间建立合理的契约以激励供应商社会责任的履行。研究发现,相对供应商主导,在零售商主导下供应商会更多地履行社会责任。引入收入共享的事后契约和成本共担的事前契约后,在供应商主导下,两种契约在一定条件下均能有效地激励供应商更好地履行社会责任,但在留存比例与分担比例相等的条件下,成本共担契约的激励效应更强。在零售商主导下,收入共享契约虽能激励供应商的社会责任履行,但因导致零售商的利润下降,故无法达成,而成本共担契约只有在分担足够大时才有激励效应。