肥胖相关因子与运动

近年来的研究表明，肥胖是由特定的生化因子引起的一系进食的调控和能量代谢紊乱的疾病。从能量代谢角度来看，产生肥胖的原因是能量摄入大于消耗而引起的一种能量失衡状态。神经系统通过多核团多神经元的网络系统对进食调节是维持体重稳定的重要原因。本综述主要对肥胖相关因子的研究进展以及运动对其中某些因子的影响做一介绍。     

从比较优势理论动态属性看其发展

从比较优势理论的发展演变过程导出比较优势理论的动态性和内生性,阐述了比较优势原则参与国际贸易与分工的战略选择,这对于促进我国经济增长和结构升级具有重要意义。     

加强的相对T1与相对Hausdorff分离性

定义了L-fuzzy拓扑空间中的加强的相对T1与相对Hausdorff分离性,讨论了加强相对T1与加强相对Haus-dorff分离性的一系列性质,证明了加强的相对T1与加强的相对Hausdorff分离性是遗传的、弱同胚不变的,并且具有可乘性.并对相对T1分离性与加强的T1分离性,相对Hausdorff分离性与加强的相对Hausdorff分离性作了比较.     

联想与对外汉语词汇教学

实现对词汇的有效记忆是留学生掌握并运用词汇的前提,而记忆又以联想作为心理基础。通过对不同类型的联想——接近联想、相似联想、对比联想、关系联想——进行充分利用,可以使学生发现词语间的内在联系,从而促进词汇的记忆,进而使词汇教学取得事半功倍的效果。     

中英封建王权地位比较

封建社会中期中英两国都有统一的王权，二者发展模式、功能均有不同，在封建社会中期都以积极功能为主，但到晚期中英王权功能发生分野。     

"亲亲相隐"原则及其活化:以刑事法为视角

尽管法学界对“亲亲相隐”原则大多持否定态度,但其精神实质与价值追求并不必然与现代刑事法精神相违背.在考察“亲亲相隐”原则的发展演变并对其进行深刻反思的基础上,提出“亲亲相隐”原则不仅符合现代刑事法的谦抑主义思想,而且体现了现代刑事法保障人权的价值追求.最后,结合我国刑法与刑事诉讼法的相关规定,探讨了现代社会活化“亲亲相隐”原则的现实途径.     

Pre-service teachers’ job-related perceptions of teaching in rural areas: a study of the free teacher education programme in mainland China

ABSTRACT

This article examines the development of pre-service teachers’ job-related perceptions of teaching in rural areas in the Free Teacher Education (FTE) programme in mainland China. Drawing on in-depth interviews with 22 teacher educators and 11 pre-service teachers, this study found that pre-service teachers’ perceptions were constructed through relative perspectives, professionality orientation, and realistic expectations during the process of FTE teacher education. Pre-service teachers employed utilitarian concerns to increase access to prestigious universities to the detriment of their academic interests. The professionality orientation of the FTE programme held a profile of isolated curriculum modules, urban-centred approach, and theory-practice divide, resulting in pre-service teachers’ fragmented body of knowledge and weak rural consciousness. Although participants saw significant improvement in living and working conditions of rural schools, their negative perceptions were magnified due to this weak rural consciousness. This study argues that the FTE programme needs to integrate separated courses and embed the components of rural settings in addition to current financial incentives.     

加入WTO对我国水果产业的影响与相关对策

入世对我国水果产业的影响及我国水果产业面临的挑战和机遇进行了全面分析和阐述。入世后给我国带来的机遇将大于挑战，希望多于困难，动力强于压力。在利益与风险并存的前提下，只有提高水果产业的产品质量、改善政策体系、加大产业的竞争实力，才能使我国水果产业保持高速可持续发展态势，占领国内国际市场。     

Mean and Mean-and-Variance Corrections With Big Data

Mean and mean-and-variance corrections are the 2 major principles to develop test statistics with violation of conditions. In structural equation modeling (SEM), mean-rescaled and mean-and-variance-adjusted test statistics have been recommended under different contexts. However, recent studies indicated that their Type I error rates vary from 0% to 100% as the number of variables p increases. Can we still trust the 2 principles and what alternative rules can be used to develop test statistics for SEM with “big data”? This article addresses the issues by a large-scale Monte Carlo study. Results indicate that empirical means and standard deviations of each statistic can differ from their expected values many times in standardized units when p is large. Thus, the problems in Type I error control with the 2 statistics are because they do not possess the properties to which they are entitled, not because of the wrongdoing of the mean and mean-and-variance corrections. However, the 2 principles need to be implemented using small sample methodology instead of asymptotics. Results also indicate that distributions other than chi-square might better describe the behavior of test statistics in SEM with big data.     

聚合物凝聚态的多尺度连贯研究

本文对“十五”期间国家自然科学基金重大项目“聚合物凝聚态的多尺度连贯研究”的立项背景、项目所研究的基本科学问题、科学目标、对学科发展的意义和项目管理等方面进行了介绍。