参数组合的改变对铁饼飞行性能的影响

在铁饼风洞实验数据的基础上，结合实际投掷运动中容易出现的几种初始参数组合，对铁饼飞行空气动力学性能及对运动成绩的影响进行了系统的计算和比较分析，并从理论的层面上获得了符合运动实际的相关结论。     

Stereotype threat and college academic performance: A latent variables approach

Stereotype threat theory has gained experimental and survey-based support in helping explain the academic underperformance of minority students at selective colleges and universities. Stereotype threat theory states that minority students underperform because of pressures created by negative stereotypes about their racial group. Past survey-based studies, however, are characterized by methodological inefficiencies and potential biases: key theoretical constructs have only been measured using summed indicators and predicted relationships modeled using ordinary least squares. Using the National Longitudinal Survey of Freshman, this study overcomes previous methodological shortcomings by developing a latent construct model of stereotype threat. Theoretical constructs and equations are estimated simultaneously from multiple indicators, yielding a more reliable, valid, and parsimonious test of key propositions. Findings additionally support the view that social stigma can indeed have strong negative effects on the academic performance of pejoratively stereotyped racial-minority group members, not only in laboratory settings, but also in the real world.     

全可变电子气门控制系统探讨

介绍了宝马全可变气门控制系统的结构与工作原理及其特点。该系统包括Valvetronic机构和VANOS机构,能够在一定的范围内连续调节气门的正时与升程,实现发动机的无节气门负荷调节,降低了发动机的泵气损失,改善了发动机的性能。     

记忆的镜像——50、60年代文学中的日本“鬼子”形象

日本＂鬼子＂形象在不同历史时期的文学作品中有着不同的呈现方式,并逐渐形成了某种无意识的表述和记忆。50、60年代文学中的日本＂鬼子＂形象受到特定时代文化语境的影响,具有模式化和想象化倾向,构成了对他者形象叙述的套话特征。文学中对日本＂鬼子＂这一他者形象的塑造和定义,背后隐含了自我的话语立场和言说意图,负载着对国家和民族形象的建构和确证。     

Queer Eye for the Straight Guy: Sexual Orientation and Stereotype Lift Effects on Performance in the Fashion Domain

Stereotype lift is defined as a boost in performance caused by an awareness of a positive ingroup stereotype. This study investigated if gay men experience stereotype lift in the fashion domain. To date, no studies have examined stereotype lift in regards to stereotypes about sexual orientation or in regards to a non-academic task. To address this gap in the literature, gay and straight men completed a test of fashion knowledge under conditions where the relevant gay stereotype was either salient or not by reminding participants of their sexual orientation before or after completing the test. A sample of 66 undergraduate male students (31 heterosexual and 35 homosexual) showed that gay men did outperform straight men on the fashion test, but only when the relevant stereotype was made salient, F(1, 62) = 5.23, p = .03. Implications of stereotype lift in gay men and on non-academic tasks are discussed.     

Stereotypes,Emotions, and Behaviors Toward Lesbians,Gay Men,Bisexual Women,and Bisexual Men

The utility of the Stereotype Content Model (Fiske, Cuddy, Glick, & Xu, 2002) and the Behaviors from Intergroup Affect and Stereotypes map (Cuddy, Fiske, & Glick, 2007) were examined in the context of heterosexuals’ attitudes toward sexual minorities. Heterosexual adults completed a survey measuring stereotypes, emotions, and behavioral tendencies toward lesbians, gay men, bisexual women, and bisexual men. Stereotype content differed across groups and showed “gendered” and “valenced” effects on emotions and behavioral tendencies. Competence predicted behaviors for men, whereas warmth and competence predicted behaviors for women, and, for the most part, more was better. Admiration and contempt mediated most of these relationships across most subgroups, but pity and envy played smaller roles for some subgroups. Across all groups, competence played a more predictive role than warmth.     

核心力量训练对5-6岁幼儿舞蹈步伐吸跳步影响分析

核心力量训练指的是围绕身体中段进行的力量练习。动作能力贯穿人的一生,如今幼儿协调性发育不理想,感统失调已成为城市幼儿面临的主要动作问题之一。5-6岁处于大肌肉群发育的黄金时期,接受能力好,本研究选取福州某幼儿园105名幼儿（其中8名幼儿未完成测试）,通过16周的核心肌肉群单一训练、交叉训练、综合训练三个维度的训练后,对他们进行了吸跳步的测试,测试结果显示核心力量训练有助于提高幼儿吸跳步动作的完成规格。     

采用气升式反应器葡萄糖母液流加发酵红曲色素的研究

以葡萄糖母液为原料 ,对在气升式生物反应器中流加发酵生产红曲色素进行了研究 ,建立了简单的数学模型控制流加 .结果表明 ,当总葡萄糖母液浓度为 1 50 g/L时 ,以 90 g/L初始葡萄糖母液开始发酵 ,当流加因子 K=0 .0 0 1 3时 ,变速流加发酵组的色素浓度比非流加发酵组的色价增加 32 % .     

乒乓球台内反手侧拉技术分析

乒乓球是一项技术性很强的竞技体育项目,随着该项运动的发展,新的技术理念不断涌现,台内反手侧拉就是近年来出现的新技术之一.反手侧拉台内小球的特点就是在有限的时间、空间内,尽可能延长挥拍路线,用摩擦击球的方法,提高球的命中率和旋转性,从而为争取主动创造机会.反手侧拉球技术的掌握除了必须明确其动作原理外,还应提高弧形摩擦球的能力,也要加强训练才能运用自如.