电工学全英语教学探索与实践

论文根据电工学课程的全英语教学研究与实践,从课程的定位、教材的选定、有效的教学方法等方面进行了探讨。全英语教学应该根据学生的英语水平、学生对课程的期望设立合理可行的教学目标。并采用循序渐进的方法,辅之以有效的教学方法,培养学生的专业素养,拓展学生的国际化视野,实现专业知识和外语知识的有机结合。     

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。     

“医疗电子影像诊断仪”实训平台的设计与实现

本文以＂医疗电子影像诊断仪＂实训平台的研制为主题,描述了该实训平台的整体构成,剖析了主要电路模块的功能,重点阐述了实训平台中各测试点及模拟故障点设置的基本理念,介绍了该平台能实现的实训项目。该平台可为医疗电子类人才的培养提供一种实用、有效的实训教学手段。     

Event-triggered non-fragile H∞ fault detection for discrete time-delayed nonlinear systems with channel fadings

In this paper, the event-triggered non-fragile H_∞ fault detection filter is designed for a class of discrete-time nonlinear systems subject to time-varying delays and channel fadings. The Lth Rice fading model is utilized to reflect the actual received measurement signals, and its channel coefficients own arbitrary probability density functions on interval [0,1]. The event-based filter is constructed to reduce unnecessary data transmissions in the communication channel, which only updates the measurement signal to the filter when the prespecified “event” is triggered. Multiplicative gain variations are utilized to describe the phenomenon of parameter variations in actual implementation of the filter. Based on Lyapunov stability theory, stochastic analysis technology along with linear matrix inequalities (LMIs) skills, sufficient conditions for the existence of the non-fragile fault detection filter are obtained which make the filtering error system stochastically stable and satisfy the H_∞ constraint. The gains of the filter can be calculated out by solving the feasible solution to a certain LMI. A simulation example is given to show the effectiveness of the proposed method.     

A cognitive TV white space-broadband power line MIMO system for indoor communication networks

Broadband power line communication (BPLC) is a promising solution to satisfy the growing data rate demands for broadband indoor communication networks. However, the BPLC transmission power spectral density (PSD) is restricted in the very high frequency (VHF) band to avoid harmful interference to the existing wireless services. In this paper, a new hybrid system is proposed utilizing BPLC and cognitive radio over TV white space (TVWS) to enhance the system capacity over BPLC in VHF, forming a VHF TVWS BPLC multiple-input multiple-output (MIMO) system. An iterative precoding algorithm is proposed to satisfy the interference limit at the TV primary user (PU) receiver (Rx) and enhance the ergodic capacity. Moreover, a power allocation algorithm is developed for the MIMO system to achieve the maximum ergodic capacity subject to the average total power constraint and limit of interference to TV PU. Simulation results demonstrate the significant enhancement in the achieved capacity by our proposed system in the VHF band compared to both previous cognitive and hybrid BPLC systems.     

高职电类专业课程设置与教学内容体系原则的探讨

本文在对工业自动化技术和应用电子技术专业毕业生进行专业能力调查的基础上，仅就如何面向职业岗位来设置电类课程与教学内容体系原则加以探讨，试图解决高职的短学制和理论实践并举要求之间的矛盾。     

Preliminary Study ＂A Training Coursebook on on the Compilation of Electrician＇ s Electronic Skills＂

教材是教师传授知识的载体,是学生学习知识的依据。高质量教材是培养高素质技能型人才的基本保证。《电工电子操作技能项目化实训教程》采用工作过程导向的项目化教材编写思路,在企业调研、工作任务分析、典型工作任务归纳的基础上,选择企业真实工作任务作为教材编写项目,同时融入＂电工操作证考试＂和＂初级电子仪器仪表装配工技能考核＂职业技能鉴定标准,使教材内容与职业资格证书制度有效衔接。     

Model free adaptive iterative learning control for a class of nonlinear systems with randomly varying iteration lengths

This paper proposes a novel model free adaptive iterative learning control scheme for a class of unknown nonlinear systems with randomly varying iteration lengths. By applying the dynamic linearization technique along the iteration axis, such systems can be transformed into iteration-depended time varying linear systems. Then, an improved model free adaptive iterative learning control scheme can be constructed only using input and output data of the system. From the rigorous theoretical analysis, it is shown that the mathematical expectation of tracking errors converge to zero as iteration increases. This design does not require any dynamic information of the ILC systems and prior information of randomly varying iteration lengths. An illustrative example verifies the effectiveness of the proposed design.     

The role of social embeddedness in professorial entrepreneurship: a comparison of electrical engineering and computer science at UC Berkeley and Stanford

Professorial entrepreneurship has recently attracted much attention. This paper draws upon historical research, a survey of faculty, and an Internet-based methodology for identifying professorial affiliations with entrepreneurial firms at two of the premier electrical engineering and computer science departments in the US, The University of California, Berkeley and Stanford. We employ the concept of “nested embeddedness” to explain why the faculty members in these two institutions have different levels of entrepreneurship and corporate involvement. EE&CS faculty at both universities were found to be socially embedded in departments and disciplines that supported and placed value on entrepreneurial activities. However, while being embedded in a university environment with a history of success and high level of support for entrepreneurship, EE&CS faculty at Stanford had a significantly greater level of corporate involvement, including the founding of start-ups. Although significantly less than Stanford, the level of corporate involvement among EE&CS faculty at Berkeley was also substantial. This suggests that being embedded in an academic department and disciplines with cultures that are supportive of entrepreneurial activity can help counteract the disincentives created by a university environment that is not strongly supportive of these activities.