信息化背景下“电路实验”模块的设计与开发

电路实验是培养学生工程概念和能力、提高实践水平的专业基础实验课程,本文在A+D lab虚拟仪器的基础上,设计开发了便于学生实践和创新的电路实验教学模块。经过教学实践结果表明,该平台有助于提高学生对电路实验的兴趣,对学生加深理解和电路基本理论,提高工程实践能力具有显著作用。     

“双创”形势下控制类课程实验教学平台建设

“双创”形势下,结合我校电气类和自动化类专业的实际情况,以加强学生工程实践能力和创新创业能力为切入点,构建了满足控制类课程的三个实验教学平台,既保证学生接受扎实的基础实验训练,又受到良好的工程师训练,让学生接触到控制领域的先进技术,激发学生自主学习热情,切实提高学生的实践动手能力、分析和解决问题能力和创新创业能力。     

电机拖动及PLC控制精品课程建设的探索

针对电机及拖动课程的现状,结合我校精品课程建设,提出了在电机及拖动基础课程中增加PLC控制的内容,并对现有的教学模式和教学内容进行了新的探索.加强电磁理论和基本原理的教学, 增加实验和实训学时,整合原有的实验设备,并在此基础上建设综合性的实验,使验证性的基础实验与实际系统相结合,可以培养学生的创新精神,提高学生的实践能力,增强学生综合素质的训练.     

全开放综合型新能源实验平台的构建

本文设计实现了全开放式新能源实验平台,综合了设计、测试、实验与组网功能,可实现控制算法级至系统拓扑级的自主实验与开发.该平台上可发展验证型、设计型、综合型等与新能源相关的四大类、二十余项实验项目,满足本科及研究生课堂教学、课程设计、毕业设计及大学生创新实践训练等多层次教学需要.实践表明,该实验平台在引领学生在电气及新能源领域的创新和实践过程中发挥了重要作用.     

建设《光信息综合实验》课程,培养创新型人才

培养既有扎实的理论基础,又有实际动手能力和创新精神的新型人才是21世纪人才培养的重点.实 验教学是训练学生基本实验技能、扩大知识面,培养学生具有解决实际问题的综合能力和创新精神的重要环节.本 文简要介绍《光信息综合实验》课程建设的探索和实践.     

基于虚拟仿真技术的足式机器人创新实验平台开发

为满足足式机器人教学实验需要及提高实验平台可靠性,研制了一种基于虚拟仿真技术的足式机器人创新实验平台。该实验平台基于PyBullet虚拟物理引擎搭建,通过设计步态规划、步行控制等功能模块,能够完成足式机器人步态规划、步行控制等算法的仿真验证等任务。同时,依托该平台展示涉及机械设计、软件开发等专业方向的教学内容,有利于智能机器人课程实践教学的开展。基于该创新实验平台,设计了一个拥有13个自由度的足式机器人,能够完成自主步行、上楼梯等功能。实践表明,该创新实验平台具有实验成本低、高度可定制化的优点,非常适合科学研究和实验教学中需要个性化定制机器人的应用场景。     

工学结合模式下电子信息专业实践教学的研究与实践

实践教学是培养具有创新意识的高素质工程技术人员的重要环节,是理论联系实际、培养学生掌握科学方法和提高动手能力的重要平台.实践教学作为高职院校教学体系中的重要组成部分,在高职教育中占有举足轻重的地位.通过对高职院校电子信息专业实践教学的现状分析,找出了存在的问题与不足,结合本校工学结合和实践教学的实际情况,提出了三段式实...     

电机类课程虚拟仿真实验设计与实现

针对传统电机类课程实物实验存在危险性大、实验平台建设成本高等问题，基于Unity3D软件设计了虚拟仿真实验平台，以直流电机、异步电机、同步电机、变压器等为对象，构建了电机拆装、起动、并联等实验场景，建立了集“理论知识学习、虚拟仿真项目研习、仿真模型实操”于一体的综合实验方法，实现了“理论与实践、虚拟与现实、教学与创新”相结合。为学生提供了自主开放的实验条件，对激发学生学习兴趣，培养学生创新实践能力发挥了重要作用。     

迭代学习的四旋翼无人机重复航迹跟踪控制实验研究

新工科建设以强化学生的工程实践与创新能力的思想为指导,为应对新的要求并推进实验实践教学改革,设计一种适应于本科生工程实践训练的四旋翼无人机飞行实验平台。该实验平台结合机械、信号处理、自动控制等学科知识,以四旋翼无人机为研究对象,分析四旋翼无人机动力模型,研究和设计迭代控制算法。采用Simulink进行仿真,以北京航空航天大学可靠飞行控制组研发的RflySim无人机模拟器平台搭建所设计的实验平台。最后,进行现场实际测试和航迹跟踪飞行测试,测试结果符合实验的预期,且航迹跟踪准确。所设计系统易于激发学生的参与兴趣,能够有效提高学生的动手能力及工程实践技能。     

基于多种微处理器递阶的实验教学平台

在传统微处理器教学实验中存在芯片种类单一,实验内容固定等缺陷,限制学生创新和思维能力的提高.为此,设计了一套多种微处理器的递阶实验教学平台,该平台软硬件资源丰富,针对性强,有机地将理论与实践相融合,从而全面提高学生的专业素质和工程能力.     

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.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

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.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

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.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

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.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.