基于模糊Petri网汽车故障诊断技术研究

随着汽车技术的发展,相应设备越来越先进,越来越复杂,这使汽车故障的诊断技术越来越困难.Petri网是系统建模工具,由于其异步及并发特性特别适合于描述系统的动态特性,因此在汽车故障诊断领域被广泛应用.通过对近年来对应用模糊petri网(FPN)进行汽车故障诊断的研究进展的综述,认为用电脑进行维修数据模拟是直观的,明确的,且易于实现,可以高效地找到汽车故障原因,并提出维护方法,从而达到维修目的.     

清代承德通向内蒙古地区的驿路和驿站

清初,清政府在承德境内建有四条通向内蒙古的驿路,并在沿线建若干驿站,保证了谕令、公文的传递,军事物资的运输,加强了东北地区各民族之间的联系,促进了承德地区和内蒙古地区商业的繁荣和城镇的形成与发展.     

虚拟软件在机械专业基础课教学中的应用探讨

在建设新工科、培养应用型人才的背景下,结合当前机械专业课程教学过程中的问题,探讨了虚拟设计类软件在机械专业基础课教学过程中应用的意义和必要性,指出可针对"机械制图""机械原理"和"机械设计"等课程进行虚拟软件融合,达到理论讲解与实际设计相结合、提高学生学习兴趣的目的。     

“体育强国”的价值选择论

体育大国和体育强国之分,只是体育在不同社会历史发展阶段选择的价值取向和判断不同而已。后奥运时代,"体育强国"把提高全民体育素质作为国家发展战略价值加以实施。不论是从经济社会发展的客观条件、公民的思想意识进步的社会基础,还是从竞技体育发展积累的经验来看,把提高全民体育素质作为国家发展战略价值选择具有现实可能性。提高青少年体质健康水平是体育强国的首要价值选择;提高全民体质健康水平是体育强国的中心价值选择;提升体育文化发展水平是体育强国的基础价值选择;提升体育社会化水平是体育强国的重点价值选择。     

深化我国职业篮球体制改革的对策研究

运用调查法、文献法对我国职业篮球现行管理体制进行全面、系统的分析研究,并结合我国国情提出从职业篮球运行机制人手,逐步深入的“渐进式”体制改革的对策.     

Parental Involvement and African American and European American Adolescents' Academic,Behavioral, and Emotional Development in Secondary School

This study examined longitudinal trajectories of parental involvement across middle and high school, and how these trajectories related to adolescents' academic, behavioral, and emotional adjustment. In addition, ethnic and socioeconomic status differences in longitudinal associations and the potential moderating role of parental warmth were assessed. Longitudinal growth modeling technique was used to describe trajectories of different types of parental involvement and adolescent outcomes over 7th, 9th, and 11th grades (mean ages = 12.9, 14.3, and 17.2 years, respectively) on an ethnically and economically diverse sample of 1,400 adolescents (51% female, 56% African American, 39% European American, 5% others). Each aspect of parental involvement contributed differentially but significantly to adolescent outcomes. Finally, parental warmth moderated the associations between providing structure at home and adolescent grade point average and problem behavior.     

You Can Ask Me If You Really Want to Know What I Think

Abstract

Recent social policy discourses in Aotearoa New Zealand focus on vulnerable children’s well-being and the detrimental, long-term and costly impacts of child poverty. The discourse pervading much of the policy labels children and young people as ‘vulnerable’ or ‘at risk’ or ‘in crisis’, a view, which we argue, is both disempowering and marginalising. We propose a shift in focus which views children and young people as agentic, capable and competent. Drawing on several small-scale research projects and reports we demonstrate how, when asked, children and young people can participate effectively in discussions about policy matters that concern them (Article 12, United Nations Convention on the Rights of the Child, 1989 [UNCROC]). We have much to learn from the insights children share with us when asked, but very often existing structures, at both government and community level, do not include adequate processes to hear their voices, let alone act on what has been communicated.     

客户终身价值前沿探析与未来展望

随着客户关系管理理论的观念被现今社会所接受,客户终身价值逐渐被企业界及营销学者所重视。如何计算和预测客户终生价值（customer lifetime value,CLV）,已经成为客户关系管理领域的研究热点。分别对客户终身价值的定义、定性研究及定量研究进行了回顾分析和归纳,分析了客户终生价值模型研究的现状以及存在的不足,并从多个视角展望未来的研究方向,以期进一步明确客户终身价值给企业带来的重要作用,并为相关研究结论在我国市场情境下的验证与拓展提供参考。     

多视角对竞技游泳项目体能训练的研究

文章重新理解了体能训练的概念,从多视角分析游泳项目体能训练的方法,并结合实际训练案例说明训练方法选择的合理性。研究结果认为,在游泳体能训练的过程中,要有较强的针对性,对每个训练手段、动作都要做多方面的观察分析,尽可能地使训练的动作接近专项技术,从而把体能训练的水平在专项上充分发挥。同时在训练手段上要多样化、兴趣化,防止单一枯燥。旨在使运动员的运动技术趋向于机械力学的合理性与能量代谢的化学性,从而为教练员训练提出一些合理化的建议。