PBL和LBL教学模式中二表法的体验

在“电路理论”课程中，三相电路功率测量的二表法是其中的一个难点。本文以学生的角度介绍在PBL与LBL教学模式下，对该内容的学习体会及对难题案例解决的自主学习探索。通过案例问题及伴随的新问题的解决，进一步加深了对课堂知识的理解，结合课堂外知识的学习，提高了学生应用知识综合解决问题的能力。     

“电力电子在电力系统中应用”课程群团队建设

“电力电子在电力系统中应用”课程团队以三门应用选修课程为核心,展开课程内涵建设。该课程群建设强调以行业应用特色为主线,由点到面逐级深入核心领域。通过对课程体系的梳理,课程教学内容得到优化;教学方法采用案例教学和团队教学法,着重培养研究生创新能力。教学效果良好。     

信号、系统与控制课程群建设

介绍了南京航天航空大学依托“国家电工电子基础课程教学基地”建设。改革电气工程与自动化专业课程体系。将电路．信号与线性系统、自动控制原理三门课组成信号、系统与控制课程群。着重在教学改革的思路、课程体系、教学计划、教学内容、实践性教学和师资队伍建设等方面进行的探索。     

电气、电子信息类专业计算机硬件课程内容与体系的改革

21世纪初的电子系统是以计算机为核心的片上复杂系统,因此,对电气、电子信息类专业,必须加强计算机硬件的课程。东南大学的计算机硬件课程体系由“计算机结构与逻辑设计”、“微型计算机系统与接口”和“计算”三门课程以及“电路与数字逻辑设计实践”、“微机系统与接口实践”、“数字系统课程设计”三门实践课程所组成,通过该系列课程的学习,学生可以获得设计微机应用系统以及设计以微机为核心的复杂系统的能力。     

RLC串联电路的时频特性仿真分析

RLC串联电路是"电路"课程教学中其中的一个重点。本文应用Multisim仿真软件对RLC串联电路进行了时域和频域仿真分析,给出了RLC串联电路的零状态响应,正弦稳态响应及其幅频特性的演示示例,理论知识和仿真演示相结合,使学生加深了对RLC串联电路的理解和掌握。     

电容充电电路的能量效率分析

本文结合RC电路和RLC串联电路,讨论了电容充电电路的能量效率。对RC电路,分析了采用指数型电压源进行充电的能量效率。对RLC串联电路,讨论了各种响应特性下进行充电的能量效率,并指出如果利用电路的欠阻尼响应特性,可以大幅提高充电的能量效率。本文的讨论对“电路”课程的教学具有一定的参考价值。     

机电类专业电类选修课程实验教学实践

本文介绍了我们在原已开设的“电工技术”、“模拟电子技术”、“数字电子技术”三门电类课程的基础上，对机电类专业开设实用型和技能型的电类选修课程的实验教学内容、实验教学方式和教学效果。     

电工学课程体系的改革

本文提出了电工学教材中把电工测量和电机控制部分内容放在“电子技术”前面不利于教学的意见，因为随着科技发展上述内容已大量采用电子技术；论述了应把电工学课程体系分为电路基础、电子基础、测控技术这样三门课程的改革方案。     

基于FHN神经元电路的研究性教学探索

“电子技术课程设计”是电子信息类本科专业一门重要的实践类课程。课程旨在融合贯通多门专业课程的核心知识,提高学生对理论知识的应用能力。针对该课程现有选题过于陈旧、缺乏创新性与时代性的问题,本文基于Fitzhugh-Nagumo（FHN）神经元电路进行了研究性教学探索。并以基于非线性电阻的Fitzhugh-Nagumo神经元电路为例,进行了数学建模、数值仿真和电路仿真研究。这类电路结构简单且现象丰富,可作为“电子技术课程设计”以及电子信息类其他实践类课程的研究案例。     

“高频电子线路”仿真式案例教学的设计

“高频电子线路”课程具有实践性强的特点,而该课程的传统实验教学存在着实验内容分立化、综合实验偏少的问题。采用案例式教学思路,选择收音机电路作为应用案例开展教学,学生通过综合案例的研究实现分立理论知识的融合。同时将电路仿真技术融入到案例设计中,发挥计算机优势以弥补理论教学和实际实验之间的差距。计算机仿真也为突破课堂教学约束,发挥学生学习主动性创造了条件。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.