实验故障在物理实验教学中的积极作用

实验故障在实验教学中除具有负面影响外,还常常具有积极的作用。本文在对实验故障进行分类的基础上,对各种实验故障的正面及负面作用进行了较详细地分析,并给出了如何有效利用实验故障提高学生的实验技能和分析解决问题能力的教学方法。     

浅析ASON光网络的故障处理

ASON光网络在传统传输网络的基础上引入了控制层面,并采用分布式控制,首次在传送网中引入动态交换的概念,第一次将交换、数据、传输综合起来.本文简单介绍了ASON光网络的故障分类、故障处理思路、故障处理方法.     

电力电子技术实验装置常见故障检修

详细总结了电力电子技术实验装置常见故障的检修,包括电源控制屏、斩波电路、单结晶体管触发电路、晶闸管主电路等相关部件常见故障,总结了故障诊断的一般步骤,以及各种故障的处理方法.     

浅谈变电运行的安全管理及故障排除

加强设备管理,防止设备事故的发生,是变电运行工作的重要内容.变电运行中出现的安全问题、设备检修和故障排除应严格按照程序,找出原因,采取应对措施.     

Fuzzy-based risk prioritization for a hydrogen refueling facility in Malaysia

Hydrogen is starting to be mentioned as an alternative fuel to replace the fossil fuel in future transportation applica- tions due to its characteristics of zero greenhouse gas emission and high energy efficiency. Before hydrogen fuel and its facilities can be introduced to the public, relevant safety issues and its hazards must be assessed in order to avoid any chance of injury or loss. While a traditional risk assessment has difficulty in prioritizing the risk of failure modes, this paper proposes a new fuzzy-based risk evaluation technique which uses fuzzy value to prioritize the risk of various scenarios. In this study, the final risk of each failure modes was prioritized by using the MATLAB fuzzy logic tool box with a combination of two assessments. The first assessment was concerned with the criteria which affected the actual probability of occurrence. This assessment considered the availability of the standard that was applied to prevent the likelihood of the scenario occurring. On the other hand, the second assessment was focused on evaluating the consequence of the failure by taking into account the availability of detection and the complexity of the failure rather than only the severity of the scenarios. A total of 87 failure scenarios were identified using failure modes and effect analysis （FMEA） procedures on hydrogen refueling station models. Fuzzy-based assessments were performed through risk prioritizing various failure scenarios with a fuzzy value （0 to 1） and risk level （low, medium, and high） while a tra- ditional risk assessment approach presented the risks only in forms of level （low, medium, and/or high）. Availability of the fuzzy value enabled further prioritizing on the risk results that fell in the same level of risk. This study concluded that fuzzy-based risk evaluation is able to further prioritize the decisions when compared with a traditional risk assessment method.     

油浸式电流互感器局部放电故障实例分析

结合辽宁电力有限公司某变电站油浸式电流互感器局部放电的故障实例,对该设备结构、故障情况、试验数据和解体检查等方面进行阐述和分析,得出导致此次局部放电的原因是绝缘受潮的结论。最后,对电流互感器的制造工艺和检测方法提出了具体建议。     

浅析印刷品压痕爆线的原因及其解决方案

<正>模切压痕是一道重要的工序,它是通过用钢刀和钢线排成的模切版,在模切机上把承印物切成一定的形状、压出痕迹或用于弯折的槽痕。其中模切是利用模切刀根据产品设计要求的图样组合成模切版,在压力作用下,将印刷品或其它板状坯料轧切成所需形状的成型工艺。压痕是利用压线刀或压线模,通过压力在板料上压出线痕,或利用滚线轮在板线上滚出线痕,以便板料能按预定位置进行弯折成型的工艺。     

WinPE在多媒体阅览室系统维护工作中的应用

计算机是多媒体阅览室的公共服务设施,由于频繁使用经常出现故障,系统维护工作繁重,维护工具的选择至关重要.WinPE是一款优秀的维护工具,文章根据笔者多年的系统维护实践,介绍了WinPE的功能及应用,为图书馆系统维护工作者提供借鉴.     

浅述语音网关日常故障处理方法

随着专网NGN网络系统的使用增多,随之对出现的一些IAD33C障进行分析,浅述IAD多媒体语音网关的常见故障及其处理方法。希望能对维护人员提高自己的日常维护起到一定的帮助作用。     

试论无线话筒发射机的工作原理及故障排除

无线话筒广泛运用于电视演播室、电影同舞台艺术扩声、展览讲解及其它专业与非专业应用场合.现将无线话筒发射机的工作原理及故障排除总结归纳,与同行们分享.