液氯离心泵的气蚀与防治

分析了影响液氯离心泵气蚀的两种参数：允许吸上真空度、气蚀余量。提出了泵气蚀的防治措施：提高离心泵基础设计质量，在实际使用中应采用高分子聚合材料涂覆，并进行补焊、补气。     

沥青质沉积引起的储层损害与对策

综述了近年来受到国际石油界普遍关注的沥青质沉积引起近井地带储层损害的问题。综述论题有：前言；原油沥青质吸附沉积过程及其对产能的影响；沥青质沉积的清除方法；结论：沥青质沉积对储层的损害和对产能的影响是不可忽视扩要损害形式为孔喉堵塞，润湿反转和微粒运移等，沥青质沉积主要是原油所处热力学条件变化，原油中沥青质絮凝并沉降的结果。这类储层损害应以早期预防为主，一旦发生严重损害，应采取有效方法清除沉积的沥青质，使油井恢复产能。     

应用点检信息化技术是实现设备状态预知维修的有效途径(续)

介绍点检信息化技术的定义、国内外发展应用情况、中国铝业山西分公司应用点检信息化技术的背景、过程、系统的组成、特点以及取得的成效，指出应用点检信息化技术是实现设备状态预知维修的有效途径。     

跨河桥梁防洪影响评价指标体系及影响防治措施研究

针对跨河桥梁防洪影响评价中普遍存在的问题,结合近年来的工程实践经验,通过对建立跨河桥梁防洪影响评价基本框架和指标体系的研究,就跨河桥梁防洪影响的评价内容、评价指标、评价计算方法进行系统的总结分析,并就相关影响给出常见的防治措施,与广大工程设计人员商榷,为今后开展评价工作提供参考。     

预应力孔道灌浆堵塞和不密实的原因及排除

针对后张法预应力孔道灌浆过程中孔道堵塞和不密实的原因进行了分析,从规范施工人员的操作和严格控制压浆质量两方面阐述了对于悬灌梁后张法预应力孔道灌浆堵塞和不密实的防治措施,以确保压浆饱满密实,保证结构物安全。     

螺纹孔加工质量和延伸公差带测量

螺纹连接在发动机和变速箱上有着广泛的应用，为保证其正确装配和实现功能，一般在加工工艺图上都会标注延伸公差带。对引起螺纹孔延伸公差带失效原因的各种因素进行了分析，并对采取的预防措施进行了讨论。     

A review of corrosion inhibitors for rust preventative fluids

Corrosion of metals has been a widespread issue in industries for centuries. The use of corrosion inhibitors in rust preventative fluids are commonly employed to provide the temporary corrosion protection to metals. The aim of this review is to summarize the rust inhibition properties, inhibition mechanism, chemistry and development of corrosion inhibitors for rust preventative fluids. Some suggestions for further research on corrosion inhibitors have also been discussed.     

高等级公路沥青路面裂缝病害的预防性养护

针对高等级公路沥青路面出现的裂缝病害,分析了传统养护方法的不足,并且着重介绍了目前比较流行的稀浆封层及红外热处理等沥青路面的预防性养护技术,从而避免路面结构的破坏,减少维修养护的总成本,为施工单位提供了良好的预防性养护技术.     

重催装置大机组自动化仪表的预防性维修

重点介绍重催装置大机组自动化仪表的预防性维修方法,通过对仪表维修计划、安装调试、结构调整和维护保养的分析和应用,使仪表自动化设备的故障率和实际折旧率降至最低,可用性和可靠性增至最高,从而保障设备的长周期运行。     

Optimal maintenance strategy for Technology‐enhanced classrooms: a case study

The purpose of the study was to collect data and evaluate an age‐based bulb replacement policy for projectors used in Technology‐enhanced classrooms in a university campus.The Office of Information Technology (OIT) had instituted a policy to replace bulbs in these projectors after either failure or 1800h of operation without failure. However, databases maintained by OIT included the time to bulb failure, the average number of times the bulbs were turned on and off per week, and the number of thermal events. Modeling the failure data with a Weibull proportional hazards model revealed that probability of bulb failure was a function of the number of hours a bulb was used and the frequency at which it was turned on and off. Combining this information with a cost model led to the recommendation for an improved condition‐based replacement policy. Copyright © 2009 John Wiley & Sons, Ltd.