Reliability evaluation and optimisation of imperfect inspections for a component with multi-defects

In this paper, a model is developed to evaluate the reliability and optimise the inspection schedule for a multi-defect component. The model uses a non-homogeneous Poisson process (NHPP) method in conjunction with a delay time approach. The inspections are designed to detect any defects in the component, however it can be imperfect. The defect is a definable state before a functional failure happens to the component. Occurrences of defects are assumed to follow an NHPP and a defect will be minimally repaired if it is identified during an inspection. It is shown that the failures occurring in an interval of inspection will also follow an NHPP. The situation of imperfect inspections and non-constant inspection intervals are considered. An algorithm is presented to optimise the intervals of inspections in order to maximise the reliability of the component, and the properties of the algorithm are shown. A numerical example with parametric study is given to show the performance of the model and the algorithm.     

企业供应物资入库质量验收问题的探讨

剖析了企业供应工作中存在的物资入库质量验收问题及存在的原因，提出了搞好企业物资供应管理，加强物资质量验收的对策。     

Rail defects: an overview

For about 150 years, the steel rail has been at the very heart of the world's railway systems. The rail works in a harsh environment and, as part of the track structure, it has little redundancy; thus, its failure may lead to catastrophic derailment of vehicles, the consequences of which can include death, injury, costs and loss of public confidence. These can have devastating and long‐lasting effects on the industry. Despite the advances being made in railway permanent way engineering, inspection and rail‐making technology, continually increasing service demands have resulted in rail failure continuing to be a substantial economic burden and a threat to the safe operation of virtually every railway in the world. This paper presents an overview of rail defects and their consequences from the earliest days of railways to the present day.     

青藏铁路物资储备基地建设

结合青藏铁路建设物资储备基地的实际情况，探讨了铁路线统购统发材料的管理模式及业务流程，总结出在实际工作中应借鉴的经验和注意的问题。     

2RE69/Zr702双金属管氨汽提塔关键部件的设计与制造

介绍了2RE69／Zr702双金属管的特殊结构、优良耐蚀性能，与管板的连接接头型式及焊接工艺、管头及液体分布器加工、装配和试验。     

110kV变电站35kV高压系统边运行边改造实践

对宣钢供电系统110kV变电站35kV高压系统边运行边施工改造经验进行了分析探讨。指出选用优良的设备、制定周密的安全措施，能够确保施工、运行安全。     

激光束偏转法检测金属表面层的缺陷

本文编程计算了由激光光热应产业的金属表面的温度分布和泵浦光的调制频率、金属层厚度等的关系，预言检测浓度缺陷的能力。用激光光束偏转法检测到表面下不同深处的缺陷，并把面扫描幅值信号以三维象和灰度象显示。     

Current ISI and monitoring technologies in European energy industries

This paper reviews available information on the state of practice of inservice material property monitoring performed in European energy industries. Current practice includes a range of standard nondestructive testing and monitoring methods, improved remote sampling and surveillance specimen testing, and new monitoring techniques which are emerging from ongoing development programs. These new technologies include ultrasonic, positron annihilation, neutron diffraction, and magnetic techniques.     

基于Windows CE的线路巡检系统

首先讨论了现有线路巡检模式的不足，然后提出了利用windows CE来构建线路巡检系统。分析了该系统的硬件平台之后，提出了线路巡检系统的体系结构，阐述了该系统应具有的软件功能。在实际应用中表明，该系统在线路巡检中有较强的推广价值。