影响大学生体育锻炼坚持的体育教学因素

为探索影响大学生体育锻炼坚持的体育教学因素,研究先通过53名本科生开放式问卷调查,提出假设和设计体育教学因素量表;然后,结合《锻炼坚持量表》对2 072名本科生进行调查研究。验证性因子分析和多元回归分析结果表明：（1）影响锻炼坚持的5个教学因素：教师评价、内容实用、兴趣契合、知识技能、认知体验,5个因素对学生体育课结束后的体育锻炼行为有深远的影响。（2）体育课程的教师得到学生认可度越高,越有利于学生坚持体育锻炼。（3）体育课程的教学内容实用性越强,与学生兴趣契合度越高,越有利于学生坚持体育锻炼。（4）在体育课堂上学到体育知识和技能、体验到锻炼的好处,有利于培养学生坚持体育锻炼的行为。     

How far the apple falls from the tree: Intergenerational transmission of educational attainment in Indonesia

We use five waves of the Indonesian Family Life Survey (IFLS) to create unique father-son matched data of the male population (aged 25–53). Using this data, we investigate the evolution of intergenerational transmission of educational attainment in Indonesia over time, by ethnicities (six major ethnic groups), and by regions (twelve provinces). To estimate the persistence in education (measured as schooling years of the father as a predictor of schooling years of the son), we use coefficient of correlation and regression coefficient methods. Our results from the regression coefficient suggest that persistence in Indonesia is declined over time. Whereas, the results from the coefficient of correlation reveals no secular trend in education persistence over time. Thus, to understand the reason behind the secular trend in the correlation coefficient we decompose the correlation following Checchi and García-Peñalosa (2008). The decomposed intergenerational correlation shows that although the persistence is declined at the lower-end of fathers’ education distribution, it is increased at the top-end of the distribution. Therefore, we argue that the coefficient of correlation should be used with caution while analyzing the education policy particularly the persistence in education. Thereafter, we document the stationary distribution and find the conclusive evidence of non-convergence in educational attainment over time among both, ethnicities and regions.     

红卫兵精神与中国新时期文学启蒙

红卫兵以反叛、怀疑和执着精神对新时期文学的启蒙产生了重要作用:红卫兵的反叛精神打破了中国十七年以来文学的制度化格局,红卫兵的怀疑精神拓展了新时期文学的现代特征,红卫兵虔诚的宗教精神促使中国文学本体意识的滋生。     

一类带有时滞捕食模型解的一致持久性

文章讨论了一类带有扩散和时滞的捕食模型．获得了系统解的一致持久性的条件,并应用特征值理论和抛物方程的比较原理证明了模型解的一致持久性,同时还可以看到系统解的一致持久性与时滞无关．     

用均匀设计选择薄层色谱最佳溶剂系统

采用均匀设计法对翻白草甲醇提取物的石油醚和氯仿萃取组分的薄层展开剂进行了优化选择．     

二元函数可微性的一个充要条件

多元函数的可微性问题教科书只给出可微的充分条件,即偏导数连续．文章把可微蕴含了各个方向的方向导数存在这一可微性的必要条件加强为充分必要条件．     

Hibernate框架在J2EE协同办公系统中的应用

阐述了持久化框架和O／R Mapping技术,对Hibernate框架进行了介绍。最后以客户管理为例,说明了在企业协同办公系统中如何使用Hibernate框架。     

主观化标记词“好端端”

状态形容词“好端端”和其他的ABB式状态词不同：由于它在词汇化过程中,词缀“端端”的“语义滞留”使它不论作何种句法成分,都要求与含有“出乎意料”语义的“对比句”同现,我们称之为“好端端”的“反预期语义标记功能”。“好端端”在共时平面上呈现出的句法位置之间存在着历时平面的语法化过程,从先到后：作谓语《作状语》作定语,各个句法位置出现的使用频率从左至右依次递增。另外,“好端端”与数量短语搭配时的所处位置前后的不同,也会对表达的主观性程度产生影响。     

Where have all the students gone? Participation of doctoral students in authentic mathematical activity as a necessary condition for persistence toward the PH.D.

The mathematics community in the U.S. has become concerned about the state of doctoral education, including concerns about high attrition rates and the small numbers of women and students from some racial and ethnic groups. This paper proposes a model of doctoral student persistence and attrition, in which student participation in the life of the department and discipline lead to increased student integration, which is crucial for students' success. Ten faculty members and eighteen graduate students were interviewed about their interests,conceptions, and experiences within mathematics, in a case study of one mathematics department. In this department, students experienced four types of obstacles to their participation: obstacles stemming from the program structure, obstacles to participation in class, obstacles to participating with faculty outside of class, and obstacles stemming from faculty beliefs about teaching and learning. Implications for the retention of mathematics doctoral students are discussed. This revised version was published online in July 2006 with corrections to the Cover Date.     

一类非自治生态系统周期解的存在唯一性

讨论了一类捕食与被捕食有放养和扩散的非自治生态系统,应用比较定理和Liyapunov函数法,证明了该系统存在唯一的全局吸引的正周期解,并推广了文[1]的相应结果。