Adolescents’ perception of peer groups: Psychological,behavioral, and relational determinants

Adolescents’ social cognitive understanding of their social world is often inaccurate and biased. Focusing on peer groups, this study examines how adolescents’ psychological, behavioral, and relational characteristics influence the extent to which they accurately identify their own and others’ peer groups. Analyses were conducted with a sample of 1481 seventh- and tenth-grade Chinese students who are embedded with 346 peer groups. Overall, females and older students had more accurate perceptions. In addition, lower self-esteem, higher indegree centrality, and lower betweenness centrality in the friendship network predicted more accurate perception of one’s own groups, whereas higher academic performance and lower betweenness centrality in the friendship network predicted more accurate perception of others’ groups. Implications for understanding the connection between adolescents’ psychological and behavioral traits, social relationships, and social cognition are discussed.     

群体腐败是社会转型期亟待重视的反腐区域

群体腐败是商品经济发展的历史产物，无论是在中国还是在世界其他国家，已越来越为人们所关注，因此，群体腐败的预防和斗争，已经成为我们反腐败斗争的重点之一。     

烷烃摩尔体积与其分子结构之间定量关系的研究

根据分子中基团的特性和连接性 ,用基团键表征分子结构 ,发展了一种计算烷烃摩尔体积的新方法———基团键贡献法 .该方法既考虑分子中基团的特性 ,又考虑基团间的连接性(化学键 ) ,具有基团贡献法和化学键贡献法的特点 .对 72 5种烷烃的计算结果表明 ,摩尔体积计算值十分接近实验值 ,平均误差 0 .2 4 8% .本方法在一定程度上揭示了烷烃摩尔体积与分子结构之间的定量关系     

清初易堂文人群形成的文化因素考察

明清鼎革之际，先朝之遗民纷纷遁逸山野，更有志同道合者结为社团，易堂文人群即是其中的典范。易堂诸子有明确的结社意识，考其形成原因，既为时局所迫，构屋于地势险要之翠微峰巅，有“结社共保”之意，然诸如明人结社与讲习之风、诗酒风流与精研时艺之风以及前代遗民生活方式之标榜等历史文化因素在易堂文人群的形成中也起着重要的作用。明乎此，可更为深刻地理解清初遗民结社繁复的文化蕴含。     

碘量法测定水中溶解氧的含量

提出一种实用、简单、易算的方法──碘量法，来测定水中溶解氧的含量。     

计算机应用基础的教学改革

本文叙述了近年来《计算机应用基础》课程教学的改革过程。通过总结肯定已取得的成绩 ,同时找出仍存在的不足 ,努力改进 ,希望将今后的工作做得更好。     

土地使用权效用——费用综合分配方法及其应用

在总结土地使用权效用--费用分配法的基础上提出土地使用权份额分配公式,并结合一实际例子对其进行应用,从而使土地使用权在不同业主之间的合理分摊问题在一定程度上得到解决.     

中央大学建筑系与民国时期的建筑师群体

通过对民国时期中央大学建筑系发展过程的梳理及对中央大学建筑系师资组成和性质的分析,从一个侧面揭示出民国时期大学师资兼职流动与大学学术发展的关系。就民国建筑教育而言,建筑师和教师这一双重身份及由此形成的大学宽松的教学氛围和人才的自由流动,在一定程度上促成了中央大学建筑系的人才济济与快速发展,并产生了民国时期辉煌的建筑成就。     

Reporting cumulative proportion of subjects with an adverse event based on data from multiple studies

Experience has shown us that when data are pooled from multiple studies to create an integrated summary, an analysis based on naïvely‐pooled data is vulnerable to the mischief of Simpson's Paradox. Using the proportions of patients with a target adverse event (AE) as an example, we demonstrate the Paradox's effect on both the comparison and the estimation of the proportions. While meta analytic approaches have been recommended and increasingly used for comparing safety data between treatments, reporting proportions of subjects experiencing a target AE based on data from multiple studies has received little attention. In this paper, we suggest two possible approaches to report these cumulative proportions. In addition, we urge that regulatory guidelines on reporting such proportions be established so that risks can be communicated in a scientifically defensible and balanced manner. Copyright © 2010 John Wiley & Sons, Ltd.     

低渗储层应力敏感评价方法探讨

应力敏感评价是储层保护以及油气井产能评价的重要依据，尤其对低渗储层更显意义重大。目前国内对油气储层的应力敏感评价方法及标准尚存在争议,通过对国内外曾提出的应力敏感评价