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...     

湖州吴兴区数字乡村智慧果蔬大棚建设方案

数字乡村借助物联网等新技术积极探索乡村发展新模式,对促进农业全面升级、农民全面发展具有重要的意义.智慧果蔬大棚作为数字乡村建设的重要部分,不但满足了农业智能化管理、精细化生产的需求,也极大改善了周围的生态环境,对于建设美丽乡村、美丽中国有着重大的实际意义.本文对智慧果蔬大棚的系统架构、网络拓扑架构、物联网平台和系统功能...     

大数据在国土资源信息化中的应用

大数据是继云计算、物联网之后信息领域的研究热点,如何利用大数据技术有效管理国土资源是国土资源信息化发展的新趋势.本文介绍了大数据及其相关技术和国内外国土资源信息化的发展现状,分析了构建国土资源大数据应用平台和大数据对遥感监测与数据挖掘的支撑作用,并从推动土地资源利用与管理、保护和提升耕地质量、促进地质工作现代化、辅助矿产资源管理以及创新国土资源档案管理五个方面阐述了大数据在国土资源领域的应用,提出了国土资源大数据应用的问题和挑战,以及在国土资源大数据研究和行业应用中的发展方向.     

物联网技术下高校智慧校园建设浅探

随着物联网技术的发展与业务融合,信息技术应用逐渐融入到各高校教学、管理、科研等活动当中,导致高校信息化不得不从以管理信息为核心的数字校园转型为以服务用户为核心的智慧校园。特别是在各高校提倡智慧校园的呼声下,人们对如何建设智慧校园也有了新的认识。文章对智慧校园的内涵进行了阐述,分析了物联网技术在高校智慧校园建设中的重要意义,并对物联网技术下高校智慧校园建设现状和未来发展方向进行了探究。     

辽宁省国土资源数据中心管理系统的研究

为了对辽宁省国土资源数据进行集中的管理和分析,对国土资源数据的元数据进行调用和访问.本文基于ArcGIS平台和Oracle数据库,使用C/S和B/S软件架构相结合的方式,开发了辽宁省国土资源数据中心管理系统.该系统建立了辽宁省国土资源数据地图服务的索引数据库,对信息中心现有的国土数据进行了基本的地图操作,对省级国土数据进行查询分析并输出结果.完成了定制图形服务、业务应用服务以及数据交换服务,解决了国土资源数据共享的问题.     

物联网技术在智慧城市建设中的应用

城市智慧化管理是我国城市管理科学化的重要组成部分,对于我国城市健康发展,有效构建新型城市管理生态有着重要的影响。城市管理水平除了影响着人们对于城市的印象,更关乎着城市的运行安全。本文就物联网技术在当前城市管理中智慧城市管理存在问题以及对策进行研究,希望能为当代城市科学发展与管理作出自己的一些贡献,现内容如下。     

本期导读

<正>物联网是新一代信息技术的高度集成和综合运用,代表了信息通信产业的重要发展方向。而智慧城市则是利用包括物联网在内的现代信息通信技术实现城市管理与服务的协同化和智能化,从而达到促进城市健康持续发展、提升城市人们生活质量的目的。"大力发展物联网,加快智慧城市建设"已成为我国经济转型升级的重要举措。2013年8月,国务院出台的《关于促进信息消费扩大内需的若干意见》中再一次明确了物联网与智慧城市的发展战略,要求"面向重点行业和重点民生领域,开展物联网重     

简析物联网技术在智慧城市建设中的应用

随着社会经济的飞速发展,我国城市化进程脚步也越来越快,城市管理的难度也逐渐加大,伴随着科学技术的不断壮大,信息化科学技术日益完善,并且在城市管理中也有着非常重要的应用。极大改善了城市生活的质量,提高了国民生活水平,推动了智能城市现代化、智能化的发展。文章就基于物联网的含义、和物联网在智慧城市建设中担当的重要角色为出发点,论述物联网技术在智慧城市建设中的应用发展,希望对相关研究人员提供一些帮助和启发,推动智慧城市向更高更快的发展。     

基于ZigBee智慧实验室系统的设计*

首先对目前国内外室内物联网应用的现状进行了调查,分析了室内物联网技术在实验室建设和管理应用中的实用性和可行性.提出了智慧实验室的概念和智慧实验室系统的整体框架,整个系统由实验室资产管理子系统、实验室视频监控子系统、实验室网关和上位机系统4个模块组成.分别介绍了系统各个模块的功能,并对整个系统进行了设计.最后对所设计的系统进行了性能测试,测试结果表明该系统实现了对实验室管理的科学化、现代化及信息化,提升了实验室管理的智能化水平,对“智能家居”和“智慧城市”的发展建设有重要的借鉴意义和参考价值.     

宁夏国土资源信息元数据库

元数据对于国土资源数据的管理、共享与利用具有十分重要的作用。本文简要论述了国土资源信息元数据的作用和意义,阐述了宁夏国土资源信息元数据现状,提出了针对宁夏国土资信息元数据标准及元数据库的建设办法。     

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.     

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.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks