基于混合模式的嵌入式水环境在线监测系统

针对当前我国水环境监测系统存在的问题,设计并实现混合B/S和C/S模式的嵌入式水环境在线监测Web服务器,并给出系统的总体设计方案,提出采用基于Web技术的B/S模式来完成对外公共服务的方案,并阐述如何使用有限状态机实现Web服务器.将基于C/S模式实现的监控服务器应用于复杂的传统监控,同时详细描述其各模块的实现方法及对应的数据包格式.测试结果表明:该系统功能完备,稳定性高,响应性能良好.     

嵌入式Web污染源自动监测系统

针对当前我国污染源监测系统存在的问题,采用基于32位AT91SAM7X系列微处理器的嵌入式Web服务器实现基于B/S模式的污染源自动监测系统.给出硬件结构图,并对其主要功能器件进行描述;给出软件平台结构图及其层次功能设计.讲解如何结合Ajax技术实现高效的Web服务器,并对系统功能做设计说明.经测试表明,系统功能完备,具有稳定性高和响应性能好的优点.     

基于Matlab Web 服务器的数字信号处理远程仿真

本文介绍了一种基于Matlab Web技术构建网络仿真系统的方法,该方法采用B/S模式,利用 Web服务器和Matlab Web专用服务器平台,操作者通过Internet登陆服务器,并利用交互式动态Web页面输入仿真参数,系统处理后返回运算数据及仿真图形.文中以FFT频谱分析为例介绍了数字信号处理远程仿真系统的设计与开发.     

基于低速处理器的功能最小化嵌入式Web服务器的设计

目前嵌入式Web服务器多使用专用集成电路(ASIC)技术或高速处理器实现，但嵌入式系统中大量存在的是技术较为成熟的低速处理器，基于低速处理器设计嵌入式Web服务器，市场前景非常广阔但技术难度较大。本提出了一种基于低速处理器的功能最小化Web服务器的设计方案，着重分析了HTTP协议的实现方法。     

基于Web API的固井工程设计系统研究

随着网络技术的更新换代,Web服务器提供了新的网络服务方式:网络应用程序接口(Web API).Web API包含了广泛的功能,该接口实现了存储服务、消息服务、计算服务等功能,这些功能可以进一步开发出强大功能的Web应用.本文主要介绍基于Web API的固井工程设计系统的原理和工作过程,并详细介绍了Web API的概念及工作方式.     

基于Client/Server模式的应用软件安全控制系统的设计与实现

系统的安全性设计是信息系统建设中的关键环节.本文介绍了开发的一个应用软件安全控制系统,它采用多层客户/服务器模式,以构件的形式实现,可以方便地与应用软件集成.最后,探讨了利用本系统扩充Web服务器,来实现Web上的安全验证的方法.     

基于DDNS的移动嵌入式Web服务器的接入方案

移动嵌入式Web服务器伴随着嵌入式技术与网络通信技术的高速发展应运而生,是基于Internet的嵌入式技术网络化的扩展应用.先从3个方面对嵌入式Web技术的优点进行了分析,接着阐述了DDNS技术在移动嵌入式Web服务器的重要作用,然后对包含DDNS模块的通用嵌入式模块进行了说明,并对DDNS工作流程及报文结构进行分析,最后对基于移动嵌入式Web服务器的DDNS功能进行了简单验证,实验证明,该方案切实可行,稳定性好且成本低廉.既是对移动嵌入式Web服务器功能的增强,也是对动态IP嵌入式服务器接入Internet的关键技术分析,旨在建立一套移动嵌入式Web服务器的通用接入方案,具有一定的研究价值.     

嵌入式平台下的Web应用

随着Internet的快速发展和普及,Web技术正逐渐被应用于各个领域中.同样,微电子技术也在不断地创新和进步,嵌入式系统成为计算机应用的一个新领域,具有功能强、实时性强、可靠性高和结构小巧等优点.基于嵌入式平台下的Web应用结合了先进的Web技术和嵌入式技术,其服务器采用嵌入式技术实现,通过Web方式实现服务器端与客...     

基于Web的温室环境无线监控系统设计

为了解决传统温室有线监控系统组网复杂、无法实现远程监控等缺点,在已有硬件架构基础上加入无线收发模块,设计开发基于Web的温室环境无线监控平台。该平台利用.net面向对象编程技术以及SQL Server数据库技术,采用客户端/服务器(C/S)和浏览器/服务器(B/S)两种架构方式实现温室数据实时采集、远程监控等功能。整个监控系统电路简单、扩展性强、实现远程控制,具有良好的应用前景。     

以ARM7为核心的嵌入式工控网络设计

给出了以三星ARM7TDMI CPU为核心,同时嵌入μClinux系统的嵌入式Web服务器硬件系统的设计方法。分析了通用TCP/IP和HTTP网络协议及嵌入式Web原理,给出了基于CGI技术和socket技术开发流程,实现了基于嵌入式Web服务器的基本工业远程监控。     

Technology innovation and process integrations for sub-100nm gate patterning

This paper presents a brief overview of the Applied Centura(R)DPS(R)system,configured with silicon etch DPS Ⅱ chamber, with emphasis on discussing tuning capability for CD uniformity control. It also presents the studies of etch process chemistry and film integration impact for an overall successful gate patterning development. Discussions will focus on resolutions to key issues, such as CD uniformity, line-edge roughness, and multilayer film etching integration.     

White organic light-emitting devices based on fac tris（2- phenylpyridine） iridium sensitized 5,6,11,12-tetraphenylnap -hthacene

We have fabricated the white organic light-emitting devices （WOLEDs） based on 4,4＇ -bis（2,2 -diphenyl vinyl）-1,1＇ - biphenyl （DPVBi） and phosphorescence sensitized 5,6,11,12,-tetraphenylnaphthacene （rubrene）. The device structure is ITO/2T-NATA （20 nm）/NPBX （20 nm）/CBP： x%Ir（ppy）3：0.5% rubrene （8 nm）/NPBX （5 nm）/DPVBi （30 nm）/Alq（30 nm）/LiF（0.5 nm）/A1. In the devices, DPVBi acts as a blue light-emitting layer, the rubrene is sensitized by a phosphorescent material, fac tris （2-phenylpyridine） iridium [Ir（ppy）3], acts as a yellow light-emitting layer, and N,N＇ -bis- （1-naphthyl）- N,N＇ -diphenyl -1, 1＇ -biphenyl-4,4＇ -diamine （NPBX） acts as a hole transporting and exciton blocker layer, respectively. When the concentration of Ir （PPY）3 is 6wt%, the maximum luminance is 24960 cd/m^2 at an applied voltage of 15 V, and the maximum luminous efficiency is 5.17 cd/A at an applied voltage of 8 V.     

Complete approach to automatic identification and subpixel center location for ellipse feature

To meet the need of automatic image features extraction with high precision in visual inspection, a complete approach to automatic identification and sub-pixel center location for similar-ellipse feature is proposed. In the method, the feature area is identified automatically based on the edge attribute, and the sub-pixel center location is accomplished with the leastsquare algorithm. It shows that the method is valid, practical, and has high precision by experiment. Meanwhile this method can meet the need of instrumentation of visual inspection because of easy realization and without man-machine interaction.     

小角度扩展相关性近似算法分析

本论文提出一种在多天线MIMO信道相关性建模中小角度扩展近似理论算法,并应用于分析MIMO系统性能。分析中分别对三种不同角能量分布情况下的空间相关性研发快速近似计算法,并同时提出双模(Bi-Modal)角能量分布情况下的近似运算。通过分析这些新方法的近似效率,可以得到计算简单、复杂度低、而且符合实际的MIMO相关信道矩阵,对系统级的快速高效计算法的研究和系统级的评估以及误差分析具有重要的意义。     

A Versatile Mixed-Signal Pin Approach for Cost-Effective Test of Automotive ICs

Integrated circuits (ICs) intended for increasingly sophisticated automotive applications bring unique test demands. Advanced ICs for applications such as highly integrated automatic braking system (ABS) and airbag controllers combine high voltage digital channels, significant VI demands and precise timing capability. Along with continued missioncritical reliability concerns, the trend toward higher voltage operation and increased device integration requires specialized test capabilities able to extend across the wide operating ranges found in automotive applications. Among these capabilities, automotive test requirements increasingly dictate a need for a cost-effective versatile mixed-signal pin electronics with very high data rates reaching up to 50MHz with a voltage swing of-2 V to +28 V.     

Optical vibration and deviation measurement of rotating machine parts

It is of interest to get appropriate information about the dynamic behaviour of rotating machinery parts in service. This paper presents an approach of optical vibration and deviation measurement of such parts. Essential of this method is an image derotator combined with a high speed camera or a laser doppler vibrometer （LDV）.     

社长序言（英文）

正Happy New Year!As we step into a new year,we take a look back at the key feature topics covered in China Communications over the past 12 months and set out our expecta-     

Call for Papers

正Introduction Jointly sponsored by the China Institute of Communications(CIC)and the IEEE Communications Society(IEEE ComSoc)since the year 2013,China Communications,currently,is aiming to gradually realise the transition from journal to magazine content and style.     

INTEGRATION OF OPTICAL AND WIRELESS NETWORKS

正For a long time,optical and wireless systems/net-works are developed in separate communities witha few attempts for in-depth convergence.In fact,it prom-ises many advantages to combine the optical and wire-less technologies in the levels of systems and networks.Recently,both academia and industry have made manyefforts to enter a new phase of development to take op-tical and wireless systems as fully integrated networks.To provide high bandwidth and reliable service for bothfixed and mobile users,a well-designed network must     

Call for Papers—Feature Topic,Vol.12,No.3,2015

正Smart Grid Communications The electric power industry is undergoing profound changes as the industry aims to capture the promise of a smart grid for a sustainable energy future.Enabled by the advanced sensing devices such as Phasor Measurement Units(PMUs),increasingly powerful