工业缝纫机针杆的气浮轴承性能数值计算与分析

为了对气浮针杆的小孔节流型轴承的支承性能进行研究,文章在建立数学模型的基础上,运用有限差分法对控 制方程进行数值有限差分的推导,利用MATLAB对针杆在低速和高速的情况下的压力分布进行了数值求解。结果表 明：气浮轴承能够较好地实现工业缝纫机的低速和高速情况下的气浮支承;双排节流小孔的压力分布承载效果比单排节 流小孔好;随着气浮针杆运动速度的变化双排节流小孔的气浮轴承的稳定性较好。对进一步深入对工业缝纫机针杆的 气浮支承研究具有指导意义。     

深井水平井水平段水力延伸能力评价与分析

对影响水平井水平段延伸能力的因素进行了分析,然后根据钻井液流体力学理论,建立了水平井循环压耗计算模型,分别对水平井总循环压耗和水平段环空压耗进行计算,进而求出了水平井水平段极限延伸长度值;对钻井液密度、钻井泵额定压力、岩屑床高度和钻井液排量对水平段水力延伸能力的影响进行了分析。研究表明,水平段水力延伸能力受钻井液密度、钻井泵额定压力、岩屑床高度和钻井液排量等多个因素共同影响。为了提高深井水平井的延伸能力,应使用较低密度的钻井液;尽量保持较低的岩屑床高度;钻井液排量应尽量小。同时还认识到,深井水平井水力延伸能力主要受到钻井泵额定压力的制约。研发高额定压力的钻井泵,是提高深井水平井水力延伸能力的主要措施。     

教师在压力情境下的应对方式与社会支持

本文研究以初中教师为被试对象 ,探讨教师在不同压力情境下其应对方式的特点以及与社会支持的关系。结果表明 ,教师的应对方式具有跨情境性 ,教师的应对方式和情境之间有显著的交互作用 ;主观支持对情绪宣泄和寻求支持 ,支持的利用度对积极评价、幻想和忍耐都有显著预测作用。     

基于浙江树人大学的民办高校教师工作压力分析

以浙江树人大学为例,对民办高校教师的工作压力情况及其应对策略进行了研究。结果表明:民办高校教师职业是一种很有压力的职业;民办高校教师的总体压力感很明显,在科研方面尤其突出;民办高校教师人口统计学变量对其工作压力有一定的影响;民办高校教师应对工作压力的策略主要倾向于积极主动行动和认知。在调查分析的基础上,从教师和学校组织两个层面提出适当减轻民办高校教师工作压力的建议。     

基于ARM架构处理器的远程医疗监护系统

随着中国步入老龄化社会,对老年人的医疗护理工作越来越受到社会的重视。文章提出一种以ARM11架构CPU为核心的远程医疗监护系统,使用嵌入式linux操作系统进行全系统管理,可以通过因特网远程访问获取血压、脉搏、体温和实时视频等信息。经过实际测试,该系统完全达到设计要求,可以满足对监护人员的基本监护要求,大大减轻护理人员的工作量,具有较大的推广应用价值。     

Self-enhancement of Peer Acceptance: Implications for Children's Self-worth and Interpersonal Functioning

Changes in feelings of self‐worth and peer acceptance associated with self‐enhancing perceptions of their peer acceptance were examined for a normative sample and for a group of peer‐rejected children. Whether the correlates of self‐enhancement differed as a function of the way in which perceptions were assessed (i.e., general versus specific measures of self‐enhancement) or by the degree of enhancement were also studied. Using a longitudinal design, 670 students in grades 3 through 5 were assessed across an academic year. For the normative sample, general self‐enhancement of peer acceptance was associated with positive outcomes; specific self‐enhancement of peer acceptance was unrelated to changes in outcomes. Both general and specific self‐enhancement scores were associated with gains in one or more outcome measures in the rejected group. No support was found for the hypothesis that mild to moderate self‐enhancement is predictive of adjustment whereas extreme self‐enhancement is related to maladjustment.     

Peer Victimization: The Role of Emotions in Adaptive and Maladaptive Coping

Mediator models were examined in which children's emotional reactions to peer aggression were hypothesized to mediate their selection of coping strategies and subsequent peer victimization and internalizing problems. Self‐report data were collected from 145 ethnically diverse kindergarten through fifth grade children (66 females and 79 males) who attended a predominantly low‐ to middle‐class school. Hypothetical scenarios were used to assess children's anticipated responses to peer aggression. Victims reported more intense negative emotions (e.g., fear and anger) than did nonvictims. Fear emerged as a predictor of advice seeking which, in turn, predicted conflict resolution and fewer internalizing problems. Conflict resolution was associated with reductions in victimization. Anger and embarrassment predicted revenge seeking which, in turn, was associated with increases in victimization. Additional pathways predicting changes in peer victimization across a single academic year as a function of children's emotional and coping responses to peer abuse are discussed.     

Predictors of gambling problems among male adolescents

The study concerns prediction of gambling problems in 178 male adolescents (aged 16 and 18 years) who completed a questionnaire, which included the South Oaks Gambling Screen (SOGS), a version of the Temperament and Character Inventory and a number of questions concerning social background, emotional and life-style factors. About 27% of the boys gamble at least weekly. As many as 16% qualify as probable pathological gamblers according to the SOGS. Another 7% are at risk. None of the social background factors are related to severity of gambling problems. The only significant family factor is parental substance misuse. The optimal multivariate model predicts about 30% of the variance in gambling problems. The strongest factor is frequency of alcohol drinking. Several factors indicate a personality with problems in relations to others. Another factor indicates a dreamy personality. Unexpectedly, impulsiveness is not related to gambling. In conclusion, problem gambling among male adolescents is related to life-style and personality, especially in relation to others, but not to usual social background factors. Gamblers are asocial rather than impulsive. The nature of this finding should be further explored, since an asocial personality may point at genetics as well as to early social influences, as may the finding on the relation between gambling and parental drinking.     

Information-seeking during acquaintanceship: Effects of level of social understanding and personal relevance

Two studies examined how individual differences in social understanding influence children's information-seeking orientations during an initial meeting with a peer, in which they do or do not anticipate future interaction. Study 1 involved a relatively controlled, laboratory setting in which 7-9 year old children were presented a list of questions from which to choose what to ask the peer. The findings indicate that children who view a person's behavior in terms of stable dispositional characteristics (high SDC), express greater interest in gathering trait-related information about an unfamiliar peer than children who do not perceive people in terms of stable traits (low SDC), but only when they expect to play games with that peer in a future interaction. Study 2 involved a more naturalistic observation of the actual questions 7-9 year old children ask during an initial meeting with an unfamiliar peer. The findings showed that high SDC children asked more questions of the peer when they expected interaction than when they did not, whereas low SDC children did not differ significantly across conditions. Taken together, the two studies indicate that the future, predictability orientation of high SDC children leads to a more extensive information search about a peer when they expect interaction with that peer involving instrumental choices.     

蒸汽在水下有限空间内喷注时喷注噪声的声源分析

在实验研究的基础上，用计算流体力学软件(CFD)对与喷注噪声密切相关的压力场与温度场进行数值计算，定量分析了在不同温度时所对应的压力场与喷注噪声的关系。