汽车起动机保护策略     

代永刚  刘青林 《科教文汇》2012,(28):81-82,100

本文首先论述传统点火锁故障导致起动机烧毁的M题,然后阐述了一种通过发动机ECM接受起动请求信号,并控制和切断起动机完成发动机点火的策略。以保护起动机反拖烧毁。  相似文献   

浅谈计算机硬盘常见故障及处理方法     

艾立文 《科教文汇》2012,(6):69-70

计算机硬盘是计算机重要存储设备,硬盘故障的处理是计算机系统维修中重要一项内容。本文先介绍硬盘有关知识,然后从几个方面分析硬盘故障及处理技术。  相似文献   

跨文化交际失误对外语教学的启示     

刘婧 《科教文汇》2012,(14):126-127

随着世界全球化脚步的加快,不同国家民族间的交流也日益频繁,跨文化交际也变得不可避免。跨文化交际指两个不具有相同语言或文化背景的人之间的交流,而由此产生的误解损失或沟通障碍则称为跨文化交际失误。本文从跨文化交际失误的诸多例子出发,探讨了导致跨文化交际失误的原因以及其对外语教学和外语学习的启示,以达到最终提高学习者外语理解应用能力,促进中西方文化更顺畅交流的目的。  相似文献   

建文帝在靖难之役中的败因探析     

李庆勇 《新乡师范高等专科学校学报》2010,24(1)

建文帝即位后施行削藩政策,激起朱棣发动靖难之役,最终以失败退出历史舞台。究其原因,大致可以归结为建文帝的八个不足:性格的宽厚仁慈,过重的文人气息,竞争对手的强大,能臣悍将的匮乏,用人方针的不当,削藩策略的失误,征讨方式的缺陷,宦官的不利影响。  相似文献   

借阅服务失误中的读者权益问题     

龚光丽 《图书馆建设》2010,(1)

服务失误指服务表现未达到顾客对服务的评价标准。从这一角度看,图书馆读者工作中服务失误普遍存在。借阅服务失误按读者遭受损失的类型可分为过程失误和结果失误,两种类型失误均造成读者权益受损,包括借阅权受限、财产权受侵害和时间成本增加。为避免因服务失误而侵害读者权益,图书馆应推行服务承诺制,建立读者申诉机制,从而规范借阅服务,有效维护读者权益。  相似文献   

毛泽东理想社会主义模式的缘起及其实践     

何花 《四川教育学院学报》2013,(11):33-37

新中国成立后至“文化大革命”时期,我国社会主义建设经历了一个曲折的过程,这固然有很多原因,但其中一个重要原因在于毛泽东本人对社会主义的构想.他的理想社会主义模式,不仅把社会主义与资本主义绝对对立起来,而且使社会主义带上了很多主观和空想色彩.其实践中的教训给我们的启示是,不仅要正确认识和利用资本主义,也要历史地、辩证地看待社会主义,在不断推进马克思主义中国化、时代化过程中,不断把中国特色社会主义事业推向前进.  相似文献   

Lessons from new experiences in extension in West Africa: Management advice for family farms and farmers' governance     

Guy Faure  Paul Kleene 《The Journal of Agricultural Education and Extension》2013,19(1):37-49

The emergence of Management Advice for Family Farms in West Africa is closely related to the increased integration of farmers into an open market economy. This is creating a strong demand from farmers for advisory support services, focusing on management of the farm. With the gradual withdrawal of the State from extension services delivery, a stimulating context exists for reviewing approaches and systems of support delivery facilities for producers. In response to these developments, several experiments based on the concepts of Management Advice for Family Farms are going on in West Africa. Beyond a variety of objectives and implementation procedures analysed in this paper, common features and a considerable degree of consensus on concepts emerge. Strengthening the producers' capacity for assessment, decision-making, and management of their farms is a common objective. Differences exist between procedures for delivery of advice, methods, tools used, and emphasis put on different aspects of management. All experiments stress the importance of training, enhancing group dynamics, and individual learning. They are all farmer and farm family targeted. Expression of farmers' objectives, needs, and demands is essential. Advice is based on data gathering and assessment by the farmers themselves. From mere technicians, extension workers become advisors and facilitators. In all cases, Farmers' Organisations are involved in governing the delivery services, though at different degrees. In several cases priority is given towards strengthening farmers' capacity in the management of delivery at both local and global levels. Significant improvements in farm performances have been reported. Cost sharing is generally accepted, but insufficient to cover all costs. However, to reach sustainability for farmers' driven and governed advice delivery services, innovative agricultural policies, and public finance are needed.  相似文献   

少数民族学生英语学习成败归因的实证研究     

黄春华 《成都航空职业技术学院学报》2013,29(2):20-22

提高少数民族学生英语水平一直都是预科英语教学中亟待解决的问题。本文以调查问卷作为研究的依据,以韦纳的成败归因作为研究的理论基础,阐述了成败归因与少数民族学生英语水平之间的关系,在对调查收集的数据运用SPSS（13.0）进行统计分析后,发现学习者更倾向于把学习成败归因于内部因素。在成功归因上,高水平学生比低水平学生更倾向归因于内部因素;在失败归因上,不同水平的学生并无显著差异。  相似文献   

高速轻烃泵轴断裂失效分析     

王大成  张禄林  范云峰 《茂名学院学报》2013,(6):45-48

某输送轻烃的高速泵（LMV311-75—69SCSS）在间断运转2333小时后泵轴发生了断裂事故。本文对失效泵轴的化学成分、硬度、金相组织、断口进行了检验和分析,结果发现该泵轴材质成分不均匀,材料组织内形成带状偏析,导致材料轴向强度不足;并详细剖析了此类非金属央杂物对泵轴失效的影响因素。综合分析认定泵轴由于材料本身的缺陷导致了疲劳断裂。为避免泵轴再次发生断裂文中提出了相应的改进措施。  相似文献   

Reliability analysis of a two-dependent-unit parallel system with a standby unit     

LI Song-chen  CHEN Ying-yun  LI Yu-peng 《重庆大学学报(英文版)》2013,12(4):187-193

A parallel system with two active components and a cold standby unit is studied in this paper. The two simultaneously working components are dependent and the copula function is used to model their dependence. An explicit expression is obtained for the mean time to failure of the system in terms of the copula function and marginal lifetime distributions in two different cases As an application, numerical calculations are presented corresponding to two different copula functions and marginal lifetime distributions.  相似文献