面向工程实践理念的“数字信号处理”课程建设

数字信号处理技术已经广泛用于科学研究与工程技术领域,在《数字信号处理》课程教学中引入面向工程实践的教学理念,对培养学生的工程实践意识、提高解决工程系统中复杂问题能力非常重要。本文针对建设《数字信号处理》课程建设存在的实际问题,从授课内容、课程实验、课后作业、考核方法、教学团队等多方面,系统地阐述“面向工程实践理念”的《数字信号处理》课程建设原则、建设方法、建设成果,以及对培养学生能力的促进作用,并给出课程建设在教学实践中取得的教学效果。本文提出的《数字信号处理》课程建设方法,对其它理工科课程建设也有很好的参考价值。     

聚焦"四力"培养的"数字信号处理"课程教学改革

针对新工科背景下工程人才培养的需求,在分析"数字信号处理"课程教学存在的共性问题基础上,本文以聚焦提高学生综合运用能力、创新思维能力、自主学习能力、工程实践能力等"四力"培养为目标,提出了改革思路和方法,优化课程内容、创新教学方法、拓展教学资源、探索教学实践模式等新举措,为面向应用型人才培养的"数字信号处理"课程建设提供新思路.     

数字信号处理课程实践化教学改革

面向应用型人才培养进行数字信号处理课程实践化教学改革。分析现有教学方法存在的问题,调研企业用人需求,依据实际工程案例,构建信号采集和处理流程的知识体系,开展理论与实践一体化教学。通过将工程案例融入课程教学,使学生建立完整的知识体系,在实践中学习和运用理论知识,激发学生学习兴趣,提高学习效率,锻炼实际的项目开发能力。     

基于FPGA的脉搏信号采集实践教学项目

针对解决复杂工程问题能力不足的问题,在“EDA技术”课程中融合专业特色,引入基于FPGA的脉搏信号采集实践教学项目。 项目由脉搏血氧饱和度传感器、调理电路、数据采集模块、SDRAM模块和显示模块等组成,能够将“EDA技术”、“电子技术”和“数字信号处理”等课程进行有效整合与应用。通过实际工程训练,学生能够将专业核心课程碎片化知识点构建较完善知识体系,进而培养其实践创新和工程应用能力。     

“数字信号处理”教学方法的探索与实践

“数字信号处理”课程最初开设于通信与电子工程专业。本文简述了在自动化专业开设“数字信号处理”的必要性;分析了教学过程中存在的主要问题,给出了产生问题的主要原因;对“数字信号处理”教学方法进行了有益的探索,论述了教学过程中遵循的基本原则和采取的主要措施。教学实践表明,依照本文内容从事教学工作取得了很好的教学效果,可以为该课程的教学实践提供有益的参考。     

“电力电子技术”课程教学方法研究

本文从"电力电子技术"课程教学及人才培养角度出发,在培养专业兴趣、发挥科研优势、加强实验教学和注重实践教学等方面对教学方法和手段进行探讨。这样可以充分发挥了科研创新、数字仿真实验、实践在教学中的作用,从而突出对学生的创新、工程实践能力培养。     

面向应用型人才培养的信号类课程改革

针对应用型人才培养过程中存在的学生知识体系不完整、工程实践能力弱等问题,基于企业用人需求及实际工程案例对信号类课程进行改革。根据案例中信号处理全流程构建信号类课程的知识体系,重构课程群的教学内容,开展流水线式教学,使学生全面了解工程项目开发过程,建立完整的知识体系,提高学习效果。教学实践结果表明,所提出的教学模式有效地提升了学生的科技创新及工程实践能力。     

"计算机硬件技术基础"课程创新教学改革的实践

"计算机硬件技术基础"是自动化等专业的重要必修学科基础课。其教学目的是培养学员的工程实践能力、实际动手能力和科技创新能力。多年来,我们围绕面向21世纪创新人才培养这一目标,根据自动化专业的特点,对该课程的课程体系、教学内容和教学方法进行全方位的改革,使之成为目前国内有较大影响力的精品课程。本文以该课程的教学改革为背景,针对该课程的特点,就如何创新课程教学、培养创新型人才,介绍我们的实践和做法。     

基于FPGA的“数字信号处理”课程设计教学实践

为了加强数字信号处理实验,形成完整的从理论到应用的课程体系,我院已经开设了＂数字信号处理＂课程设计课程,以Xilinx公司的System Generator软件和Virtex-ⅡPro开发板作为软、硬件平台,进行从基础到综合的一系列教学实验。实践表明,这种实验教学模式为学生提供了综合性实践创新平台,使学生能够深入了解数字信号处理系统的实际意义,可激发学生的学习兴趣和创新意识,并与国际最先进的开发模式接轨,提高了学生的科研能力和工程能力。     

基于工程教育理念的“数字电子技术”课程教学改革探索

本文基于新工科与工程教育的人才培养要求,注重“数字电子技术”课程兼具基础理论性与实践性的双重特点,从理论教学、实践教学以及考核方式等方面进行教学改革探索,构建以学生为主的线上线下混合式教学模式,贯彻理论性与实践性并重的工程教育理念。实践表明,新的教学模式与教学方法不仅能够促进学生对理论知识的掌握,而且有利于对其进行综合实践能力、创新思维与创新能力、工程意识以及持续学习能力的培养,课程改革在理论教学与实践教学中均取得良好的教学效果。     

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.