基于校园网的数字视频监控系统

校园监控系统对高校的安全保卫工作意义重大,在校园局域网普及度较高的今天,构建一个容量大、质量高、可靠性高、成本低、监控方式灵活且易于扩展的校园网数字监控系统成为可能。结合校园安防工作特点,以校园网资源作为后台,通过系统逻辑分析、设备功能分析,设计基于校园网的数字监控系统总体方案,经过设备选用,实现在基本设备系统支撑下,系统规模可以根据学校经济能力逐步扩展的校园网数字监控系统,满足了校园安全防范与管理工作需要。     

基于物联网的学校安防设计

随着社会对学校安全问题越来越重视,传统的硬盘录像的安全系统越来越突现出管理效率低,安全能力低,工作效率低等弊端,不能满足大众对校园安全的要求。针对现状,在此设计了引入了物联网技术的综合性学校安防系统。该系统引入了物联网等目前最新的科学技术和先进的物理设备,设计了包含门禁系统、视频监控系统、对讲系统、指纹识别系统等子系统。初步实现了校园安全防范机制,推动了校园安防事业。     

数字视频校园监控系统设计

该系统采用模拟摄像机、视频服务器和网络摄像机直接联网进行监控与信号传输,采用Honeywell DVM系统对信号进行控制显示。该系统可实现校园各级子系统联动操作,并能通过校园内部的Intranet网络进行网上实时监控。同时,DVM系统可以实现与Honeywell门禁系统ProWatch、防盗报警系统的安全防范功能无缝集成。     

数字视频监控系统设计

校园监控系统对保护学校的财产和人身安全意义重大,结合学校的安防工作特点,设计数字视频监控系统的总体方案。该系统采用流媒体服务器、管理服务器和网络摄像机直接联网进行监控与信号传输,采用Clinux系统对信号进行控制显示。该系统可实现校园各级子系统联动操作,并能通过校园内部的Intranet网络进行网上实时监控。同时Clinux系统可以实现与Honeywell门禁系统ProWatch、防盗报警系统的安全防范功能无缝集成。本文介绍了数字视频监控系统的设计目标、设计要求、设计原则以及总体方案。     

基于复杂校园环境的IP视频监控规划与设计研究

视频监控系统目前运用相当广泛,针对学校校园的复杂环境以及事件多发的情况,文章通过对传统模拟视频监控和IP视频监控对比的方法,采用系统性、可靠、智能化的IP视频监控设计方案解决传统模拟视频监控无法满足的问题。实现了IP视频监控系统对校园的安全防范,突发事件的及时响应,为事件的事后取证提供了保障。同时,阐述了智能化的视频监控技术,为学校的管理提供了便利。     

海康威视助力几万所校园监控

近日，据记者多方获悉．海康威视已经为全国几万所大中小学、幼儿园提供了监控系统。自今年上半年全国发生多起校园恶性袭击事件之后．中共中央政治局常委周永康便在专题会议上指出：党政一把手要“亲自抓”校园安全，严令各地加强校园安保工作。为了保护学生的生命及财产安全，有效防范校园恶性事件的发生．目前各地都大规模开展了校园监控建设。     

基于嵌入式的视频监控系统的应用研究

视频监控系统是城市安全防范建设的核心组成部分。基于嵌入式的网络视频监控系统克服了传统视频监控系统的种种弊端,利用先进的科学技术,实现了智能图像分析、远距离监控、全方位监控管理和维护等功能,满足了安防监控设备长时间稳定运行以及对数据存储系统可用性、容量的要求,为城市安全防范提供了一个全新、高效可统一管控的解决方案。     

校园网络化监控的应用分析

校园规模不断扩大的同时,高密度的学生人数,也为学校的安保、后勤和管理等工作带来了更大的难题。如何确保校园安全,在校园安全事件和学生管理工作中处于主动地位,成为了各大院校共同关注的难题。在这种背景环境下,网络化监控系统应运而生,不仅为校园安全建设提供了技术支持,而且也便于实现对学生学习生活的管理。文章将从校园网络化监控系统的构建和校园网络化建立系统的运用两个方面对校园网络化监控的应用进行分析。     

基于Android移动平台的智能校园监控系统设计

创建平安校园是学校自身发展的需要,也是教育主管部门的要求,平安校园是充分利用"人防"、"物防"和"技防"等多种手段,以实现校园的平安、避免各种事故发生为目的的一体化防范体系。校园监控是创建平安校园的主要技术手段,随着3G网络的发展,智能手机的应用也越来越大众化,基于Android移动平台的智能校园监控系统以其独特的优势和便携性能而备受关注,针对校园监控存在的各种不足,提出了基于Android移动平台的智能校园视频监控和设计方案。     

基于物联网技术的校园综治安全系统研究

在高校规模不断扩大和校园不断开放的今天,校园综治安全形势面临新的问题和挑战。系统在校园网络建设和应用的基础上,引入物联网技术与应用,实现校园行车管理、电子巡更、门禁管理、热区监控、资产管理等安防技术系统．并在此基础上整合视频监控和广播系统,以综治综合管理平台实现各个安全子系统的统一管理,促进校园综治安全技术水平的提高。     

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.     

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     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first