机械故障监测与诊断技术的研究综述

概述了在机械设备的大型化、连续化、高速化和自动化的发展趋势中,机械故障监测与诊断技术在其设备的安全、可靠、高效运行方面中起到了重要的作用,并综述分析了振动分析方法这一关键技术,阐述了机械故障监测与诊断技术的发展趋势。     

广联达土建计量软件在《建筑工程图识读》课程中的应用

在《建筑工程图识读》课程教学中引入广联达土建计量软件,教师引导学生运用该软件完成建筑物可视性数字模型和钢筋工程量报表,实现“做中教,做中学”,极大地提高了学生的学习积极性,很好地弥补传统教学模式的不足,帮助学生完成知识的学习和技能的培养。     

力学教学内容和课程体系改革研究与实践

本文依据《面向21世纪普通物理学教学内容和课程体系改革研究与实践》课题研究方案要求，对力学课程的教学内容，课程体系和教学方法进行了改革研究与实践。     

无创正压通气治疗急性左心衰的临床研究

目的：观察机械通气治疗急性左心衰的疗效。方法：60例急性左心衰患者,随机分为常规治疗组和无创通气组,无创通气组在常规治疗基础上加用机械通气治疗,观察通气前后心率（HR）、呼吸频率（RR）,平均动脉压（MAP）及血气分析（pH、PaO2、SaO2、PaCO2）的变化及临床症状的改善情况。结果：机械通气治疗后,患者呼吸困难明显改善,生命体征很快稳定,血气分析指标明显好转。结论：对各种不同原因引起的急性左心衰,机械通气能及时有效的改善患者的临床症状及低氧血症,是抢救急性左心衰的有效措施。     

《冲压工艺学》圆筒拉深过程应力应变状态分析授课探讨

圆筒形件的应力应变分析对于应对实际生产中可能出现的各种缺陷至关重要,在实际授课过程中,学生普遍反映该部分理解起来较为抽象,相关教材中也存在不尽完善之处。文章通过理论分析对圆筒形件拉深过程进行分析,不仅完善了相关教学理论,使学生接受起来更加容易,并且根据实际教学总结相关口诀,使得关键知识点更加易于记忆。     

Vacuum interrupter, high reliability component of distribution switches, circuit breakers and contactors

The use of vacuum interrupters(VIs)as the current interruption component for switches,circuit breakers,reclosers and contactors operating at distribution voltages has escalated since their introduction in the mid-1950’s.This electrical product has developed a dominating position for switching and protecting distribution circuits.VIs are even being introduced into switching products operating at transmission voltages.Among the reasons for the VI’s popularity are its compactness,its range of application,its low cost,its superb electrical and mechanical life and its ease of application.Its major advantage is its well-established reliability.In this paper we show how this reliability has been achieved by design,by mechanical life testing and by electrical performance testing.We introduce the“sealed for life”concept for the VI’s integrity.We discuss this in terms of what is meant by a practical leak rate for VIs with a life of over 30 years.We show that a simple high voltage withstand test is an easy and effective method for monitoring the long-term vacuum integrity.Finally we evaluate the need for routine inspection of this electrical product when it is used in adverse ambient environments.     

Supporting Lesotho teachers to develop resilience in the face of the HIV and AIDS pandemic

HIV and AIDS threaten to erode the wellbeing of teachers who are faced with an increasing number of children rendered vulnerable by the pandemic. This article explores the usefulness of a supportive group intervention, Resilient Educators (REds), in supporting Lesotho teachers to respond to the HIV and AIDS-related challenges. A time-series pre- and post-intervention design was used to evaluate the programme. The findings indicate that the intervention led to an increase in the sense of agency of participating teachers both on a personal and community level. The findings have international significance for teachers working in similar contexts characterised by extreme adversity.     

单线双竖井的铁路隧道内列车活塞风的计算方法

针对单线双竖井机械通风的铁路隧道,以流体力学的恒定流理论为计算依据,推导出在隧道内列车活塞风计算方法.     

教学研究中的“写生”与“写意”

中小学一线教师进行教学研究的主要目的是解决教学中的问题,在教学研究中应侧重于＂写生＂。在此基础上,发觉、提升自己独特的实践理论,进行＂写意式＂的创造性研究。