NETLAB-An Internet based laboratory for electrical engineering education

INTRODUCTION In electrical engineering, laboratory experience is an integral part of the educational process. In fact, the amount of resources required to design and con-struct innovative experiments for electrical engi-neering education is relevant, and the number of in-stallations is often limited due to economic factors (Corradini et al., 2001). As a result, the possibility of experimental training for all the students is extremely reduced. With the rapid progress of Internet technol…     

论语篇的联结手段及其应用

语篇的联结手段是语篇分析中的一个重要环节。联结的方式多种多样 ,主要有 :语法手段、词汇衔接、逻辑联系语及语用上与语义上的意涵等     

鲜切茭白短期贮藏过程中的电导率变化

新鲜茭白经切片等处理后,于冷藏(1℃)和常温(20℃)下包装贮藏,在贮藏过程中对两组切片的电导率进行测定,结果显示:随着浸泡时间的延长,电导率不断上升;在常温下,从第3d起,电导率迅速上升,而在冷藏条件下,前3d电导率持续下降,随后也迅速上升.在整个贮藏过程中低温贮藏下切片的电导率明显小于常温贮藏下切片的电导率.     

Testing results analysis of contact materials＇ electrical contact performance

Because of the different ways in which contact materials work, the basic requirements for silver metal oxide contact materials are different. They are anti-welded and anti-erosion when closed, anti-erosion when broken, and arc easily moved and have smaller contact resistance. In this paper, La2O3 is used as a stable oxide in contact material to replace CdO. A new type of Ag/SnO2-La2O3-Bi2O3 contact material is first obtained through using powder metallurgical method. Then electrical contact material parameter tester is used to test the electrical contact performance of the contact material. Through experiments, the arcing voltage and current curves, arcing energy curves, fusion power curves while broken and contact resistance while closed were obtained. Analysis of the results showed that the addition of La2O3 makes the contact material have the following advantages： smaller electrical wear, smaller arc energy, smaller contact resistance and arc is more easily extinguished.     

《电工工艺》课程教学的探索

对电工工艺课程教学进行探索，具体内容包括：教学手段、教学方法、教学内容及考核方式方法等，目的在于使学生加深对电工工艺知识的理解掌握，使之与专业知识融汇贯通，培养学生的职业能力，提高教学质量。     

Investigation of oil-air two-phase mass flow rate measurement using Venturi and void fraction sensor

INTRODUCTION Accurate measurement of multiphase fluids flow rates in the petroleum industry is of great importance. The most reliable measurement technique for multi-phase flow is separating the mixture and using con-ventional devices for measuring single-phase flow. However, in many cases the separation is not practical from both technical and economical points of view. An alternative solution is the multiphase flow me-tering system, usually consisting of a combination of devices for ph…     

兴趣导向多信息技术融合模式下教学方法研究与实践——以《机电传动控制》课程为例

推动“中国制造2025”进程,培养一批高素质机电专业型人才势在必行,这也是高校对机械类专业大学生培养目标的具体要求。机电类专业基础课《机电传动控制》则为实现这一人才目标提供了强有力的工具。以基本技能为目标组建学生兴趣小组,精心设计课程教学,将课程内容与基本技能融合,多信息技术贯穿教学并维持学生兴趣,达到事半功倍的效果。文章从提高学生主动性、信息技术下教学内容多样性等方面对教学方法进行探讨,为专业基础课和专业课程的教学提供借鉴和参考价值。     

元结构理论在快速连接器上的分析及应用

利用元结构理论对快速连接器进行了有限元分析计算,并利用快速连接器的CAE分析,验证了采用Solid Works建立三维数学模型,再导入ANSYS Workbench模块进行机械构件的有限元分析计算方法和步骤的正确性,为相关工程技术人员提供了一种分析方法。     

循环经济视角下废旧家电逆向物流模式研究

废旧家电作为特殊的固体废弃物,具有环境危害性与再利用经济性。对废旧家电的回收再利用不仅可以节约资源、保护环境,还可以强化企业竞争优势、提高客户服务水平,符合循环经济“资源-产品-废弃物-再生资源”的发展理念。对家电制造企业而言,实施逆向物流首要的关键问题是选择和确定逆向物流回收模式,这将决定其逆向物流运作的绩效。基于循环经济理念,通过我国废旧家电回收现状及常见模式的分析,构建了一个符合我国国情的联合回收模式。     

应用项目教学法设计中职《电工基础》课程--以日光灯安装方法的教学为例

在中职《电工基础》教学中运用项目教学法,把理论教学与实践教学有机地结合起来,最大限度地提高学生学习电工知识的兴趣,在物理教学活动中充分体现学生的自主、合作、探究的学习方式,让学生实践能力、分析和解决问题的能力、交流合作能力得到全方位地锻炼,是促进中职《电工基础》教学改革的一项有力措施。