对"电机及拖动基础"课程教学方法的探讨

“电机及拖动基础”因其具有概念十分抽象、理论繁琐、公式和结论多等特点,并且涉及的基础课程多,课程难度较大,是一门难教难学的基础课程。本文针对“电机及拖动基础”课程在教学过程中出现的这些问题,首先分析了具体原因,然后结合多年的教学实践,提出。电机及拖动基础”教学应该实行课堂讲授与习题讨论相结合,理论教学联系实际,淡化理论推导、强调基本概念和原理,加强实验课教学,从四个具体方面提出了解决问题的方法,以提高该课程的实际教学效果。     

基于微课和雨课堂混合教学模式的“电气制图”课程改革与探究

随着MOOC、SPOC、微课和直播课等多种线上教学形式的发展,混合式教学模式的应用改善了传统课堂教学模式。文章探讨了基于微课和雨课堂混合教学模式在“电气制图”课程中可行性和应用效果。将电气工程专业2019级(86人)、2020级(172人)本科学生分成创新组和传统组,传统组采用传统授课方法,创新组选用微课和雨课堂混合教学方法。创新组与传统组期末考试成绩失分比约为60%,网络问卷调查结果显示创新组满意度高于97%。结果表明微课和雨课堂混合教学模式能够提高教学效果。     

Matlab／Simulink在“电机拖动与控制”中的应用

为了克服高职院校硬件实验设备不足，本文将Simulink仿真软件应用于“电机拖动与控制”教学中，介绍了Simulink的特点和仿真建模的方法，详细给出了建模与仿真实例。教学实践表明，在“电机拖动与控制”课程中使用Matlab／Simulink仿真工具，可以帮助学生理解课中的难点，使课程中许多抽象的概念形象化，既调动了学生学习的积极性，又可提高教学效果和质量。     

电机实验教学的改革与探索

对于电气类专业的学生来说,“电机及拖动基础”课程在整个专业学习中占有相当重要的地位。如何把电机理论教学与实践教学有机结合起来,调动学生的学习兴趣和积极性,是一个值得探讨和不断实践的问题。通过改变教学次序、增加实验设备、改进实验方法等,对电机实验教学进行改革与探索,把理论教学与实践教学有机结合起来,使学生更好地掌握“电机及拖动基础”这门课程。     

慕课背景下的“电工技术”教学方法实践

“电工技术”是非电类专业的一门重要专业基础课。在教学过程中，知识点繁多分散与课时紧张的矛盾特别突出。本文以戴维宁定理为例，研究慕课背景下的教学方法，对课前-课上-课后环节进行教学设计，促使学生参与教学的全过程，通过“雨课堂”这一信息技术手段掌握学情并适时调整教学方案，提高了教学效果。     

加强课程建设提高"电机及拖动基础"课程的教学质量

“电机及拖动基础”课是电气工程及自动化专业的一门专业基础课，其教学质量的好坏直接影响着许多后续课程的学习。由于该课程概念多、推导多、抽象、涉及的电磁场内容较多，再加上教学过程中的一些难点，使得教师和学生普遍感觉到难教、难学。因此，迫切需要从教学手段、教学内容、实验室建设等方面进行教学改革，加强课程建设，强化学生的工程意识，培养学生的动手能力，才能全面提高教学质量。     

“电机与拖动基础”课程教学改革探索

在“电机与拖动基础”课程教学过程中,开展了一系列改革探索：通过建立电机结构3D模型、电机电磁场3D模型以及透明电机模型的演示等教学辅助手段,增强学生的感性认识;通过引入对比法与启发式教学方法,培养学生总结归纳知识的能力;探索建立教学效果的反馈方式,并根据反馈结果调整教学手段与教学方法;建立开放性实验,提高学生的综合素质以及实践能力;探索多种方式综合评价学生的学习效果,摆脱课程评价仅依赖于期末考试的评价方式。     

“雨课堂”在“通信原理”课程实验教学中的应用探索

针对传统“通信原理”课程实验教学环节落实不到位的问题,将基于现代信息技术的雨课堂引入“通信原理”课程的实验教学中,以二进制相移键控实验为例,阐述如何利用雨课堂实现课前实验原理预习、课上进行实验原理讲解和操作理论指导、课后实行实验数据处理指导和教学过程评价。教学实践表明,雨课堂增强了师生之间的联系和交流,帮助教师检测每一个学生对实验原理和操作的掌握情况,可更好地调动学生做实验的积极性并形成客观的过程性评价。     

浅谈《电机拖动与控制》一体化教学模式的改革

《电机拖动与控制》是机电一体化专业中极为重要的一门课程。本文就传统的《电机拖动与控制》课程教学方法作为比较对象,分析本课程在一体化教学模式中的特点及内涵,研究一体化教学模式实施的前提条件、基础和关键,并着力阐释本课程采取一体化教学模式的具体措施,为课程教学模式改革、提高教学质量、指导学生的未来就业提供理论依据。     

“微电子工艺与实践”课程群建设与教改实践

围绕电子信息类专业核心课“微电子工艺”、“微电子器件基础”以及实践课“微电子生产实习”和“微电子器件与工艺实验”等课程教学改革为核心,围绕学生教学主体进行课程群的内容及教学模式调整;运用现代教育MOOC平台和混合式“翻转课堂”教学方法及校企合作实践资源共享等几个环节进行了“微电子工艺与实践”课程群建设,完善教学环节设计,强化实践实习的实效性。     

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.