智慧校园物联网一体化设计

校园信息化发展到智慧校园2.0阶段,学校对硬件设备智能化的要求与日俱增.随着物联网技术的发展,校园物联网在智慧校园日常管理中发挥着越来越重要的作用.基于面向服务的网络架构(Service-Oriented Architecture,SOA),将物联网技术和智慧校园综合服务平台相结合,对智慧校园物联网进行一体化设计,并分...     

物联网的技术思想与应用策略研究

在综合分析物联网的基本概念和关键技术研究进展的基础上,研究提出了关于"多域融合共享和泛在综合服务"的物联网核心技术思想;研究了智慧化综合服务平台的技术体系结构并且建立了相应的实验理论模型;研究建立了实现未来物联网市场应用、融合共享、泛在服务、商业模式和产业结构的商务应用模型,提出了"智慧服务商店"的概念,并研发了实用的"智慧校园"综合服务示范实验系统和实验性"物联网科技园智慧服务商店";研究了以物联网应用为标志、以产业应用和智慧服务为特征的后互联网时代新兴智慧服务产业的应用策略.     

嘉兴市秀洲区数字乡村智慧农业方案设计

嘉兴市秀洲区原有农业信息化系统多为烟囱式架构,各系统之间相互独立,数据分散,且部分数据准确性较差,无法满足农业发展的需求.秀洲区智慧农业示范项目综合应用物联网、大数据和云计算等新技术,搭建智慧农业物联网和大数据分析平台,构建了秀洲全产业链数字化平台、秀洲农业数字化监管平台和秀洲农业数字化服务平台;同时应用GIS和数据可...     

REST架构机制下的物联网服务平台设计

研究REST架构机制下的物联网服务平台设计。通过在REST架构机制下构建物联网服务平台,分析物联网服务平台设计需求,从而制定出优化的平台设计方法,以便可以设计实现基于REST架构机制的物联网服务平台。结果表明,在REST架构机制下设计物联网服务平台,不仅具有高拓展性,也可以扩展客户端功能,设计的物联网服务平台的性能提升了20.0%,可发挥积极的应用效益,值得推广。     

智慧社区真正走进百姓家庭

正智慧社区是指充分利用物联网、云计算、移动互联网等新一代信息技术的集成应用,为社区居民提供一个安全、舒适、便利的现代化、智慧化生活环境。上海国茂针对智慧城市、数字家庭的概念,推出了智慧社区新媒体信息发布系统,是一个服务于社区百姓、物业部门、街道居委会等的智慧社区信息服务平台。智慧社区新媒体信息发布系统上海国茂的新媒体信息发布系统突出为百姓提供便捷服务,可利用终端产品为小区或者园区住户、业主、企业集团提供社区或者园区公共服务、物业服务、信息查询及验证服务。利用信息化手段建设智慧社区,提升社区和园区     

基于大数据云平台的智慧社区顶层架构设计

本文从智慧社区的系统架构、智慧社区综合服务云平台、智慧社区物联网平台和智慧社区APP等四个方面进行架构设计,并对各架构进行了详细阐述,从而为政府和企业建设智慧社区提供了功能参考模型和建设思路,推动了智慧社区的发展,具备一定的参考价值。     

Web of Things：开放的物联网系统架构研究

针对过去几年物联网以垂直行业应用为主,系统部署成本高,缺乏系统间跨行业的资源共享,用户只能被动接受服务,无法参与到服务的生成中,不利推广等问题,将Web技术作为Internet of Things实现和推广的手段,对目前国内外Web of Things工作进行了总结分析,提出了扁平化的Web of Things开放架构.首先分析了现有Internet of Things架构的不足和需求,并结合现有的Web of Things概念模型,提出了Web of Things开放架构和其中的关键技术、开放模式.最后,对Web of Things和Internet of Things进行了系统对比.     

智慧园区建设探讨

园区是我国经济建设中的一种重要形态,智慧化是今后园区建设发展的必然方向。给出了智慧园区信息服务平台的体系结构,分为感知层、网络层、平台层和(智慧)应用层4个层次,基于该体系结构讨论了园区各个层的建设内容。感知层收集园区数据信息,是智慧的基础;数据互联是智慧的核心,网络层和平台层提供数据互联的基础设施,应用层挖掘数据间的关联,提供各类应用服务,是智慧的体现。分析了智慧园区建设中涉及的若干关键技术,包括物联网、云计算、面向服务的架构(SOA)和安全。智慧园区可看作一组物联网应用,云计算是实现平台层的理性技术,而SOA支持智慧服务的快速开发和部署。最后针对园区建设内容多、周期长等特点,讨论了园区建设规划问题。     

智慧校园综合服务平台设计与开发

针对当前学校信息化建设中的数据不统一和信息孤岛等问题,设计并开发了智慧校园综合服务平台,详细分析了系统架构和功能架构的设计要点,从而促进数据在各系统的流动,实现教学资源的集约化和自动化.     

物联网“云管端”的技术发展与应用

目前全球物联网市场还处在初级阶段,物联网产业发展机遇与挑战并存,但物联网的建设被上升到国家战略的层面,总体发展前景广阔.基于“云管端”的未来物联网信息服务的新架构,不只是一种网络架构,而是新的信息服务平台架构,同时也是新的发展战略的体现.     

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.