Voidage measurement based on genetic algorithm and electrical capacitance tomography

INTRODUCTION Two-phase flow exists widely in chemical, pe- troleum and metallurgical industries. The voidage is one of the most important parameters of two-phase flow because the measurement of the voidage is im- portant for safety, environmental protection, energy conservation and quality assurance in industry (Hewitt, 1978; Lin, 1992). Although many voidage measurement methods have been proposed, it is still difficult to measure the voidage due to the complexity of the characteristics o…     

"M3"型单相交流电路实验板

“M3”型单相交流电路实验板是根据电工学教学需要而设计制作的。“M3”型实验板有机地组织各个散件方式的单项实验器材,克服了散件方式实验的诸多弊端。“M3”型实验电路板布局简洁,结构牢固,造价低廉,使用安全便捷,线材损耗少,器材损坏率低。“M3”型实验电路板不仅能够完成“单相交流电路”的全部实验,还可以进行与“单相交流电路”有关的“日光灯电路”和“提高功率因数”的实验。在日常教学中,“M3”型实验电路板还可作为多种其它电路的教学示教板和实验板。用“M3”型实验电路板组织教学,采取“循序渐进”或“以‘实’带‘虚’”的方法,可以取得良好的教学效果。     

初中物理电路教学方法初探

初中物理中的电路内容，是该门课程的一个重点内容，而电路是电学部分的基本内容，对电路的学习可分为三个部分：电路图、电路的实际连接、实物电路图的连接。     

汽车电器虚拟试验模型设计

本文分析了汽车电器试验的特点,介绍了基于Flash设计汽车电器虚拟试验模型的思路,举例介绍了利用Flash MX 2004制作蓄电池充电试验互动动画的思路和过程。使耗时蓄电池充电试验变得快速、简单而且直观。     

一次继电保护装置误动原因的分析

本文针对220kV线路保护装置的一次误动行为进行了分析,指出了误动原因,并结合运行经验提出一些整改建议,对完善装置功能有一定的借鉴意义。     

电工技术实训课程改革研究

分析了工科人才培养的社会需求,指出在我校应用性人才培养的背景下,进行电工技术及实验课程模式改革的必要性。提出电工实训课程改革方案并在教学中付诸实施,实施结果表明：该课程改革方案是可行的,具备推广到其他实践课程的价值。     

Technical research on optimization design of contacts of electrical connector

Pin and socket contacts are the key parts of electrical connector as aerospace electronic components. The contacts are also the direct carriers for signal transmitting of electronic equipments, passing the signal from the input end to the output end of electrical connector. The reliability of pin and socket contacts directly influences signal transmission. The goal of this study is to enhance the contact reliability of aerospace electrical connector. Computer simulation analysis was made on contacts performance data by utilizing the simulation system developed by PCL Language of MSC software. Furthermore, the results were experi- mentally validated so as to realize the objective of optimizing contacts design.     

Measurement of oil volume fraction and velocity distributions in vertical oil-in-water flows using ERT and a local probe

INTRODUCTION The need for metering multiphase flow in the petroleum industry has been evident for many years. Considerable research has been conducted into this field for developing a suitable flowmeter which can be used in industrial environments. Various tech- nologies have been employed, and among which the tomographic techniques are increasingly being used. Process tomography is an emerging measure- ment technology with applications in a broad range of industries. It is non-invasive a…     

参议员候选人的实力差异与竞选方式选择——以民国时期重庆市第一届参议员选举为例

抗战结束后,内外环境发生了有利于民主政治尝试的变化,以重庆工商界为首的地方精英政治参与热情高涨,应对这一要求的举措就是市参议员普选。国民政府初步建立起规范市参议员选举的制度;在竞选过程中,出现了负责策划的竞选组织;候选人根据各自的实力分别采用了以报刊、名片、标语、广告为载体的文字宣传,以公众聚集地为平台的公开演讲和以音乐、画像、物品赠送为中心的政见表达等宣传方式。这种竞选活动的展开在一定程度上起到了民主启蒙和政治动员的作用,但选民投票率并不高。     

可调家用万年历的单片机原理

本文主要描述以HT48R30A单片机为微处理器构成的电路系统硬件的工作原理,着重介绍了本系统所应用的各硬件接口技术和各个接口模块的功能及工作过程.通过载体显示数据,所以具有人性化的操作.可以显示时间,公农历日期、星期,温度、节气,和当天距离节气的天数,并有闹铃和智能控制的功能.