发动机电缆修理方法研究

发动机电缆结构复杂,故障情况多样,常规的电缆修理方法不仅成本较高,而且维修效果并不是很理想。由于发动机电缆的修理质量,直接关系到发动机使用的可靠性。因此,本文通过对一款大型发动机电缆的故障分析、研究,探索出一套提高该型发动机电缆修理质量的修理方法,以实现维修效果的提升,降低维修成本的目的。     

Periodical Preventive-Maintenance Contract for a Leased Facility with Weibull Life-Time

This paper develops a mathematical model to derive the optimal periodical preventive maintenance (PM) policy for a leased facility with Weibull life-time. Within a lease period, any failures of the facility are rectified by minimal repairs and a penalty may occur to the lessor when the time required to perform a minimal repair exceeds a reasonable time limit. To reduce failures of the facility, additional PM actions are carried out periodically during the lease period. When the life-time distribution of a product is Weibull, the optimal number of PM actions and the corresponding maintenance degrees are derived such that the expected total maintenance cost is minimized. The structural properties of the optimal policy are investigated and an efficient algorithm is provided to search for the optimal policy. Finally, numerical examples are provided to illustrate the features of the proposed model.     

Maintenance and repair expenditures: determinants and tradeoffs with new capital goods

Traditionally economic analysis has focused on new capital investment, while ignoring expenditures to maintain or repair existing stock. Recent, broader theories of replacement have emphasized the important role played by both maintenance and utilization rates. However, the decision to extend the service life of capital has been given scant empirical attention, owing partly to a lack of appropriate data. This study exploits survey data that report annual maintenance/repair expenditures for Canadian manufacturing industries. A standard production framework, modified to incorporate endogenous depreciation, guides the econometric analysis. The empirical results indicate that the cost of capital, among other variables, has a statistically significant effect on maintenance/repair decisions.     

提高水平井大修质量的工艺措施应用

水平井可有效增加油气层的泄露面积,提高油气采收率。通过G104-5P35水平井钻塞、打捞施工实例,对提高水平井钻磨、打捞施工质量的控制措施进行研究探讨,为以后的水平井大修作业提供有用的经验。     

水泥混凝土路面的养护与维修

文章以柳南高速公路小平阳—宾阳段综合治理工程为例,分析了水泥混凝土路面的病害,并根据工程实际提出水泥混凝土路面的养护和维修措施。     

关于嘉兴市凤桥镇冯家大院修缮工程施工监理要点

结合文物工程的特点,明确古建筑的文物的修缮的原则和规范,分析了文物修缮工程的施工监理要点。     

对石油企业设备修保管理的外包服务运行模式探索

外包服务是一个蕴涵巨大价值的新兴项目,是当今国内乃至世界物流发展的一个重要方向.资产设备作为社会生产生活资料的重要组成部分,同样可以引入外包服务的模式.无论从理论支持方面还是实际操作方面早已具备良好的条件,但同时存在着诸多问题.针对这些问题提出具体的对策,对促进石油企业的发展有很大的益处.     

石油天然气钻井旧钻具的综合修复利用研究

在石油天然气钻井施工过程中,常常造成钻具接头磨损、偏磨及丝扣粘连,这是引起钻具损坏进而演化为井下事故的主要原因之一。同时由于钻具接头超磨,也容易造成钻具使用周期缩短甚至提前报废。为延长钻具使用寿命、减少事故发生,在实践中总结了一整套行之有效的修复方法:即:用气体保护焊接方法修复钻具接头;丝扣刷镀铜提高其表面质量,防止磨损和粘扣;用等离子喷焊耐磨带增加钻具接头耐磨性。实践证明这些方法可行且十分有效。     

燃气管网系统供气可靠性评价方法研究

燃气管网系统在发生故障时会影响供气能力,但这是一种可修复的系统,其故障率与系统的可靠性相关。在界定供气可靠度的基础上,根据燃气管网系统的状态变化类似于齐次马尔柯夫过程的特点,探讨燃气管网系统供气可靠性评价的计算模型,并选择某燃气管网进行试算。     

强化高校修缮工程内部审计的思考

针对高校修缮工程的特点,结合高校修缮工程内部审计的实际情况,研究提高审计工作效率的途径和方法,对强化高校修缮工程内部审计进行探讨。