Sakai开源学习平台应用研究

网络教学平台在我国高校中普遍流行，但是在二线城市的中小学中存在使用网络教学平台匮乏的问题，本文通过分析国外著名的Sakai开源网络教学辅助教学平台以及其开发框架，将协作学习、共享资源与Sakai平台结合，设计出适应中小学使用的智能化网络教学平台。     

分段随机抽选算法在工程图学智能试题库系统设计中的应用

工程图学试卷以图形为主,针对其出卷难的问题开发了基于VB的工程图学智能试题库系统;本文重点讨论了工程图学的自动组卷策略和分段随机组卷算法,该算法可根据设定好的难度系数进行自动组卷,成功率高、方便快捷。     

分段随机抽选算法在工程图学智能试题库系统设计中的应用

工程图学试卷以图形为主,针对其出卷难的问题开发了基于VB的工程图学智能试题库系统;本文重点讨论了工程图学的自动组卷策略和分段随机组卷算法,该算法可根据设定好的难度系数进行自动组卷,成功率高、方便快捷。     

三维建模库创建在工程图学教学中的应用研究

现代三维CAD技术的发展,三维技术在工程图学教学中的应用日益广泛,传统的教学模式已经不在适应现代化的教学,在图学教育中引入三维实体建模理论和技术,使教学过程与工程应用相结合。基于三维模型在工程图学教学中起到越来越重要地作用,利用三维软件,主要以Solidworks为例,创建三维模型库,应用在工程图学教学和精品课程中上,文章讨论了创建的优势以及对教学改革的影响。     

“脉冲与数字电路”辅助教学软件——SDSD

“脉冲与数字电路”的内容,对于学生的后续课程以及他们将来的工作都是十分有用的.它主要包括1.组合电路、2.时序电路、3.A/D和D/A变换器、4.脉冲电路以及5.简单数字系统的设计五部分内容.为了配合教学,很有必要开发这样一种辅助教学软件,它能用软件作为设计工具,学     

《工程图学学报》简介

工程图学学报是中国工程图学学会会刊。学报发表图学科学领域中科研、教学及应用的高质量论文。论文反映我国图学科研的新成果,发展水平及方向。学报的内容包括理论图学、图学应用、计算机图学、计算机辅助设计、科学可视化、工业设计、图样标准化、图学发展综述、书评、图学教学及图形学科动态。欢迎投稿。     

《工程图学学报》简介

工程图学学报是中国工程图学学会会刊。学报发表图学科学领域中科研、教学及应用的高质量论文。论文反映我国图学科研的新成果,发展水平及方向。学报的内容包括理论图学、图学应用、计算机图学、计算机辅助设计、科学可视化、工业设计、图样标准化、图学发展综述、书评、图学教学及图形学科动态。欢迎投稿。     

《电工电子》网络教学互动平台的实践性研究

利用计算机技术和网络技术构建的网络教学平台实现了教学模式的改变,将教学从传统的课堂环境延伸到网络环境,通过构建网络教学环境,形成“以学生为中心”,教师和学生“教”与“学”的网络互动平台。本文分析了《电工电子》网络教学平台的技术特点,主要对基于Web技术的网络多媒体教学互动平台的设计思路、模型和应用策略以及主要技术的实现方法进行了一些探讨。     

《工程图学学报》简介

《工程图学学报》是中国工程图学学会会刊。学报发表图学科学领域中科研、教学及应用的高质量论文。论文反映我国图学科研的新成果,发展水平及方向。学报的内容包括理论图学、图学应用、计算机图学、计算机辅助设计、科学可视化、工业设计、图样标准化、图学发展综述、书评、图学教学及图形学科动态。欢迎投稿。     

基于ARM核的ADμC7026硬件系统开发及其在医疗仪器中的应用

本文结合目前医学院校的特点和影像设备学教学的需求,为了能更好得使学生理解医学影像设备学原理,设计一套可以完成影像设备学控制部分功能的硬件系统开发板,该开发板板不仅能够使医学影像专业的学生做多项设备实验,巩固所学的技术专业课,培养学生的动手能力和创新能力,而且可以为从事医疗仪器开发的教师或技术人员提供一个较好的开发平台。     

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.