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81.
现代化工综合实训工厂建设的探讨与实践   总被引:1,自引:0,他引:1  
通过对化工实训基地建设必要性的研究,以及对化工仿真培训装置发展历程的全面分析,提出了我院实训基地二期工程——现代化工综合实训工厂建设的方案,并对"实训工厂"的预期效果作了评估。  相似文献   
82.
物业管理中业主公约的法律问题   总被引:1,自引:0,他引:1  
业主公约是物业管理中普遍存在的一种规范性法律文件。业主公约的法律性质应定位为自治规则 ,它的订立不同于一般契约的订立 ,其内容应包含法定条款和约定条款 ,其效力应及于特定物业范围内的所有业主和使用人  相似文献   
83.
中国乡村旅游研究综述   总被引:10,自引:0,他引:10  
乡村旅游是我国农村经济在新时期实现转型的重要途径之一.随着乡村旅游业的蓬勃发展,国内乡村旅游研究引起了政府部门和学者的广泛重视.通过对当前国内乡村旅游研究现状的梳理,从乡村旅游概念界定、乡村旅游发展模式、乡村旅游与农村社会经济发展、乡村旅游规划与设计和乡村旅游发展存在问题及负面效应等方面评述了我国乡村旅游研究进展及存在问题.  相似文献   
84.
目前,纷繁复杂的社会现象对人们产生极大的影响,成人的变化,特别是价值趋向的变化,这些都对青少年产生很大的影响,尤其对价值观、人生观、道德观和世界观的影响.青年学生思想政治道德存在着一些问题.文章对现阶段学校德育中存在的问题与原因进行了分析.  相似文献   
85.
Mediation and moderation are two theories for refining and understanding a causal relationship. Empirical investigation of mediators and moderators requires an integrated research design rather than the data analyses driven approach often seen in the literature. This paper described the conceptual foundation, research design, data analysis, as well as inferences involved in a mediation and/or moderation investigation in both experimental and non-experimental (i.e., correlational) contexts. The essential distinctions between the investigation of mediators and moderators were summarized and juxtaposed in an example of a causal relationship between test difficulty and test anxiety. In addition, the more elaborate models, moderated mediation and mediated moderation, the use of structural equation models, and the problems with model misspecification were discussed conceptually.
Bruno D. ZumboEmail:
  相似文献   
86.
We investigate the impact of health shocks on wealth, using all four waves of the Health and Retirement Study, and estimate not only the short-term effect but also the long-term effect of health shocks on wealth of the elderly. We find that new health events lower wealth in elders during the period in which such health shocks occur, but the impact tends to disappear over time. We also find that health shocks result in greater wealth depletion when they occur later in life. Together with existing health problems, the overall impact of health problems on wealth increases over time.
Hyungsoo KimEmail:
  相似文献   
87.
文章在一个内生经济增长的OLG模型框架下研究现收现付制养老保险计划的挤出效应。具体考察公共养老金税率变动对家庭的消费与储蓄、生育选择以及经济增长的长期影响。结果表明,存在向上利他动机的情况下,挤出效应的大小取决于养老基金的规模,适度规模的公共养老金计划不会挤出私人储蓄。而有利于消费增加与经济增长;较大规模的公共养老金计划会对私人自愿储蓄与消费产生负面影响,并且对储蓄的挤出作用要大于对消费的挤出。人口老龄化进程在一定程度上缓解挤出效应,促进资本积累与经济增长。  相似文献   
88.
文章基于 CLHLS 队列数据,运用统计分析及经验论证,解析出婚姻状态影响老年人死亡概率的作用机理,即在婚状态以其“保护效应”减小老年人患病的机率,进而减小其死亡概率;相反,不在婚状态的“损害效应”会增加老年人患病的机率,进而增加其死亡的概率。在所得结论基础上,为促进老年健康和应对养老挑战,针对老年人婚姻问题提出了相关政策建议。  相似文献   
89.
We focus on the construction of confidence corridors for multivariate nonparametric generalized quantile regression functions. This construction is based on asymptotic results for the maximal deviation between a suitable nonparametric estimator and the true function of interest, which follow after a series of approximation steps including a Bahadur representation, a new strong approximation theorem, and exponential tail inequalities for Gaussian random fields. As a byproduct we also obtain multivariate confidence corridors for the regression function in the classical mean regression. To deal with the problem of slowly decreasing error in coverage probability of the asymptotic confidence corridors, which results in meager coverage for small sample sizes, a simple bootstrap procedure is designed based on the leading term of the Bahadur representation. The finite-sample properties of both procedures are investigated by means of a simulation study and it is demonstrated that the bootstrap procedure considerably outperforms the asymptotic bands in terms of coverage accuracy. Finally, the bootstrap confidence corridors are used to study the efficacy of the National Supported Work Demonstration, which is a randomized employment enhancement program launched in the 1970s. This article has supplementary materials online.  相似文献   
90.
Youth’s perceptions of peer norms have profound effects on their attitudes and behaviors. Unfortunately, their perceptions of peers tend to be biased. To investigate the role of media in the formation of misperceived peer norms, the current study tested and compared two media-effect mechanisms: the direct exemplar mechanism and the indirect influence of presumed influence (IPI) mechanism. The two mechanisms were tested in a sample (n = 1746) that is representative of college students in one large university in China, based on which the actual and perceived campus smoking rates were examined. The individual-level perceived peer smoking prevalence was then analyzed in comparison with the campus-level actual smoking prevalence. The results revealed serious overestimations of peer smoking prevalence. As predicted, pro-smoking media content significantly heightened smoking prevalence estimates through both exemplar and IPI mechanisms. In contrast, anti-smoking messages did not elicit any intended effect through the IPI mechanism, but showed a boomerang effect through the exemplar mechanism. These findings suggest that both pro- and anti-smoking media content may be responsible for inflated perceptions of peer smoking among youth.  相似文献   
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