离心风机旋转叶片表面压力分布实验研究与三元数值分析

本文利用作者自行设计的机械密封式压力传输器，对离心通风机旋转叶片表面静压分布进行测量，并绘制出静压分布曲线，将此曲线与三元流变分有限元程序的计算结果进行比较分析，得出若干结论，可为离心风机的工程设计提供借鉴．     

初探兔室旁核对心肌收缩力的调控

采用电刺激兔下丘脑室旁核后观察血流动力学的变化，初步探讨中枢神经系统对心肌力调控的机理。发现室旁核被刺激兴奋后，不但有升高动脉血压的作用，更重要的是对心脏有正性肌力的作用并同时增加心肌氧耗量，其机制可能与室旁核内NMDA受体的激活有关。     

Patterns of Bully/Victim Problems in Mixed Race Groups of Children

This study investigated the extent of bullying within and between British Asian and White girls and boys (n = 156) and some of the reasons why it occurs. There was no significant difference in the percentage of peers that nominated Asian and White children as either bullies or victims. Contrary to our prediction (derived from Tajfel's social judgement theory), both Asian children and White children were significantly more likely to be named as bullies of same-race classmates than to be named as bullies of other-race classmates. Again contrary to our prediction, for Asian boys and White boys there were no significant correlations between general racial preferences/attitudes on the one hand, and the extent to which they were named by classmates as bullies of other-race children on the other hand. In order to investigate the types of bullying directed at own-race and other-race pupils, a subset of the sample of children (n = 60) were also asked about the specific types of bullying they had experienced, and who was responsible. Some significant racial differences emerged, most notably that proportionally more Asian children than White children reported that they had been teased about their colour or race by children of the other-race, and the opposite was the case for non-racial types of teasing. The implications of these results for children's social development, and for school's attempts to remove bully/victim problems, are discussed. One recommendation was that teasing, and especially racial teasing by racial majority pupils, should be a focus for intervention.     

活塞环压力分布非仅为余弦函数表达式的研究

本文分析了非仅用余弦函数表达活塞环径向压力分布的方式及有关这种表达式的特性．非仅为余弦函数的表达式具有如下优点：在给定Ｐ（π）／ｐｍ值时，函数的形式十分简单；ｐｍｉｎ／ｐｍ之值较大，且位置也较为理想；ｄｐ（π）／ｄ０≠０．此外，文中还分析了著名的Ａｒｎｏｌｄ公式，证明其可转化为更简单而正规的形式，而且它即为文中所指非仅为余弦函数表达式的一个简单特例．通过理论分析与数值计算表明，存在着在特性上较仅为余弦函数表达式更佳的其他一些表达式，它们在生产中具有很大的推广价值．     

Latin American Productivity from 1990 to 1998 in the Mexican Journal of Psychology

Published uninterruptedly since 1984, the Mexican Journal of Psychology (MJP) has been recognized as one of the most important periodicals in Spanish-language psychology. After coping with financial impediments and a lack of scientific contributions, the significance of the MJP emerged. The journal remains vital in the development of Latin American psychology. It is today recognized as having the highest impact of all Latin American psychology journals as well as having the second highest impact of all psychology journals in the Spanish language. The goal of the present study was to review the profiles of the MJP from 1990 to 1998 by using a bibliometric classification procedure. Four indicators were employed in the present analysis of the articles including measurement techniques, methodology, field of psychology, and main results.     

带裂纹自增强与非自增强高压容器的疲劳对比试验及失效分析

本文通过对带裂纹的高压容器进行自增强与非自增强的内压疲劳对比试验,研究了自增强处理方法对带裂纹高压容器疲劳寿命的影响。试验结果表明,自增强处理不但提高了内壁带裂纹的高压容器的疲劳寿命,而且在一定条件下也提高了内壁和外壁带裂纹的高压容器的疲劳寿命。同时自增强处理也能显著提高筒体与平板封头连接焊缝的疲劳寿命。根据试验结果,文中也对高压容器的疲劳失效特点作了分析。     

空化水射流研究现状及其应用

综述了高压水射流技术发展及应用过程,认为空化水射流是一种富有发展前途的高效新型射流．通过对空化水射流机理、空化数和冲击压力两个重要空化参数的分析,显示了空化射流的潜在优势．实验表明人工淹没空化射流具有较强的冲蚀效果,并克服了靶距范围的不足．简要介绍了该技术应用于火箭发动机内脏固体推进剂清洗工程的射流系统设计．     

过程写作教学法在外语教学中的应用

过程写作教学法强调写作过程的重要性而非注重写作成果，关注学生在写作过程的一系列环节中的互动性反复评改和反馈。笔者将这种教学方法应用到外语教学活动中，通过教师的有效调节，发挥学生的主体作用，促进合作学习，取得了良好的教学效果。     

Popularity and Acceptance as Distinct Dimensions of Social Standing for Chinese Children in Hong Kong

This study attempted to validate distinctions between popularity and social acceptance in the cultural context of Hong Kong. We recruited 280 Chinese children (132 girls, 148 boys, mean age = 9.5) from Hong Kong primary schools. These children completed a peer nomination inventory assessing popularity, social acceptance, social rejection, aggression, peer victimization, and social behavior. Consistent with research conducted in western samples, we found that social acceptance was correlated primarily with positive behavioral characteristics (i.e., assertiveness‐leadership and low levels of submissiveness‐withdrawal). In contrast, popularity was associated with a more mixed pattern of features including high levels of aggression. The overall pattern of findings closely replicates past research conducted in North American and European settings.     

Friendship and Delinquency: Selection and Influence Processes in Early Adolescence

Positive association of relevant characteristics is a widespread pattern among adolescent friends. A positive association may be caused by the selection of similar others as friends and by the deselection of dissimilar ones, but also by influence processes where friends adjust their behavior to each other. Social control theory argues that adolescents select each other as friends based on delinquency. Differential association theory, on the other hand, argues that adolescent friends influence each other's delinquency levels. We employ new statistical methods for assessing the empirical evidence for either process while controlling for the other process. These methods are based on ‘actor‐oriented’ stochastic simulation models. We analyze longitudinal data on friendship networks and delinquent behavior collected in four waves of 544 students in 21 first‐grade classrooms of Dutch secondary schools. Results indicate that adolescents select others as friends who have a similar level of delinquency compared with their own level. Estimates of the social influence parameters are not significant. The results are consistent with social control theory but provide no support for differential association theory.