声学所发布通信声学突破性技术

中国卫通城市应急联动系统是在一个城市中通过采用统一的报警平台，用于公众报告紧急事件和紧急求助，并整合城市各种应急救援力量及市政服务资源，实现多警种、多部门、多层次、跨地域的统一接警、统一指挥、联合行动。及时、有序、高效的开展紧急救援或抢险救灾活动，从而保障城市共公共安全的综合服务体系及技术集成平台。     

中国卫通推出城市应急联动系统

中国卫通城市应急联动系统是在一个城市中通过采用统一的报警平台，用于公众报告紧急事件和紧急求助，并整合 城市各种应急救援力量及市政服务资源，实现多警种、多部门、多层次、跨地域的统一接警、统一指挥、联合行动。及时、有序、高效的开展紧急救援或抢险救灾活动，从而保障城市共公共安全的综合服务体系及技术集成平台。     

城市应急联动系统和专用移动通信网

为了提高政府对紧急、突发事件的快速反应能力,向市民提供快捷的紧急救助服务,建设城市应急联动系统非常必要.文章提出了城市应急联动系统的组成和实施方案,描述了城市应急联动系统应具有的功能,并指出在应急联动系统中采用数字集群通信系统作为无线移动平台应该是最佳方案,而支持中国自主研制的数字集群通信系统,对发展民族集群通信产业意义深远.     

城市应急与非应急一体化联动系统解决方案

通过建立以城市应急联动系统为主要内容的城市公共安全科技支撑体系，以提高政府对紧急事件快速反应和抗风险的能力，并为市民提供更快捷的紧急救助服务，已成为现代城市管理中迫切需要解决的重大课题。针对这一重大课题，国内外厂商纷纷提出了各具特色的解决方案。其中，亚奥数码有限公司提出了具有前瞻性和实用性的新思路、新方案：“城市应急与非应急一体化联动系统”。     

中国内陆首家应急联动系统南宁市城市应急联动系统的设计构架

城市应急联动是政府协调指挥各相关部门，向公众提供社会紧急求助服务的联合行动。广西壮族自治区南宁市人民政府经过多方面调查研究，经国家批准决定建设“南宁市城市应急联动系统”，将政府各个独立的应急部门有机地结合起来，采用先进、科学、可靠的高科技手段管理城市，提高南宁市城市数字化和信息化的管理水平。国家计委2000年10月正式批准南宁市城市应急联动系统工程立项建设，于2001年5月正式批复该项目的可行性研究报告，使该系统成为迄今为止国家计委批准建设的中国第一套城市应急联动系统。该项目是广西壮族自治区和南宁市的重点项目，也是南宁国家信息化试点城市的龙头工程项目。     

爱立信携手中国卫通为潍坊市提供城市应急联动和社会综合服务系统

近日．由爱立信和中国卫星通信集团公司携手为潍坊市开发的城市应急联动和社会综合服务系统一期工程试运行开通。该系统将有效提高潍坊市的城市综合管理水平，特别是应对突发事件、实现跨部门联动的通信指挥能力。     

爱立信携手中国卫通为潍坊市提供 城市应急联动和社会综合服务系统

近日．由爱立信和中国卫星通信集团公司携手为潍坊市开发的城市应急联动和社会综合服务系统一期工程试运行开通。该系统将有效提高潍坊市的城市综合管理水平，特别是应对突发事件、实现跨部门联动的通信指挥能力。     

我国城市应急联动通信系统将形成数百亿市场

5月25日，“2006城市应急联动通信高层研讨会”在京召开。会议就城市应急联动系统建设的挑战与应对，我国城市应急机制存在的主要问题，我国城市应急联动的主要需求、管理规划，城市应急联动的建设思路以及应急联动建设模式等几个方面进行了研究和探讨。与会人士一致认为，建设好一个城市应急联动系统，将会帮助政府提高对各种突发事件的反应和处理，以及抗风险能力，对减少灾害损失，更好地为百姓服务起到关键作用，也为建立公众服务型政府打好坚实基础。     

南宁市政府与摩托罗拉共建中国第一套城市应急联动系统构筑高效应急系统打造一流现代城市

２００１年１１月１１日,广西南宁市与世界无线通信巨头摩托罗拉共同打造的中国第一套城市应急联动系统在南宁投入试运行。国家计委、信息产业部、广西壮族自治区、南宁市以及摩托罗拉（中国）电子有限公司等单位的领导出席了应急联动中心的揭幕仪式。该系统的建成标志着中国城市在应急管理水平和信息化建设上的新突破。随着中国加入世界贸易组织并在管理模式上逐步与国际接轨,这种运用高科技管理城市的方法必然被越来越多地引入中国,从而推动中国城市的现代化步伐。城市应急联动系统就是综合各种城市应急服务资源,统一指挥、联合行动,…     

基于CERS的接处警系统的设计与应用

针对当前城市应急联动系统（CERS）在中小城市的快速发展和应用,其中接处警系统是城市应急联动系统的重要组成部分,为提高系统的稳定性,通过分析当前城市应急联动系统的基本结构,研究设计出适合现代社会应急需求的接处警系统的整体结构、系统的主要功能以及接处警流程,并进行了应用方面的分析研究,为城市应急联动系统的建设提供了很好的指导作用.     

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.     

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.     

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.