雷达目标识别发展回顾与实现中的关键理论

雷达目标识别作为智能化武器发展的关键技术,在未来信息化条件下联合作战中发挥着极为重要的作用.阐明了雷达目标识别研究的科学意义,回顾了该领域的发展过程及已取得的研究成果,分析了基于高分辨雷达一维距离像目标识别研究的具体思路,在此基础上,重点讨论了几种一维距离像的特征提取方法、分类识别方法及如何克服方位角变化对距离像的影响等雷达目标识别实现中的关键理论,对这些理论的深入研究将极大地促进雷达目标识别技术的发展.     

汉字识别研究的回顾

本文回顾了汉字识别研究的历史。根据模仿人类视觉模型，基于文字图像的统计模式识别方法是文字识别取得瞩目进展的基础。模式识别信息熵理论揭示了模式分类的信息过程和理论极限，本文讨论了从汉字图像中提取特征以及文字识别分类器设计和学习的各种方法。介绍了文本识别必须解决的文字切分，版面分析、理解和重构，及提高识别性能等重点问题，最后，总结了文字识别研究的重要进展和对今后的展望。     

混沌理论与雷达技术发展

混沌动力学作为研究非线性系统的一种新方法已引起雷达界的重视,混沌信号是一种类随机性信号,具有极强的抗干扰性和极低的截获概率。研究了混沌在雷达中的应用,分析了混沌理论在雷达波形设计、信号检测与估计、目标识别、及杂波分析与建模等领域内的发展情况,指出在雷达应用技术中引入混沌理论是雷达技术发展的必然趋势,并预测了混沌理论与雷达技术研究发展的前景。     

自动目标识别的工程视角述评

自动目标识别(ATR)是一个和信号与信息处理、模式识别、人工智能等学科密切相关的特殊工程技术应用领域。由于ATR系统识别对象固有的不确定性，识别环境的复杂性，以及日益加剧的识别对抗性，使得ATR的发展一直面临着从理论到技术、到应用的系统性挑战。该文从工程视角出发，阐述了ATR的定义与内涵，简要回顾与分析了该领域发展动态，梳理了ATR的核心技术体系与系统开发模式，最后对未来的发展挑战做了分析。      

基于小波和BP神经网络的无线电探测目标识别技术

目标识别是智能弹药研发的关键技术之一，本文采用小波变换和BP神经网络理论对无线电探测目标识别技术进行了研究，给出了分类识别算法，并用实测数据进行了实验验证，结果表明该识别算法具有很高的目标识别率．     

D-S证据理论方法在目标识别中的应用

D-S证据组合理论已经成为不确定性推理的一种重要方法,基于该理论的多传感器决策层数据融合已得到广泛应用.介绍了D-S证据理论及其有关概念和D-S合成法则,阐述了基于D-S证据组合理论的数据融合一般步骤及决策层判决方法,运用D-S证据理论对目标进行了融合识别.与单一传感器的目标识别结果相比较,上述方法能明显提高目标识别能力,同时降低目标识别的不确定性,提高目标识别的可靠性.     

小波分析在文字识别中的应用

小波分析是新兴的用于科学和技术领域中的分析理论,能够科学、迅速地解决文字信号、图像信号等信号在时空域中的分辨率和奇异性位置等问题,成为分析发展史上重要的里程碑。与此同时,随着社会的发展,行业信息传递、存储成为重要的工作内容,因而加强小波分析在文字识别中的应用,能够将信号更好地分解交织在一起,收集更为微小的信号细节,赋予信号更多突变点诊断能力。因而,文章从小波分析的相关发展入手,探究文字识别中分析的相关信息,从而进一步探究小波分析在文字识别中的应用,旨在提高小波分析的实践效能,提升文字识别在社会各行业发展中的积极作用,推动社会各行业中信号传送的发展。     

雷达

TN952008011692混沌理论与雷达技术发展/朱丽莉,张永顺,王冲(空军工程大学电讯工程学院)//现代雷达.―2007,29(1).―16～19.混沌动力学作为研究非线性系统的一种新方法已引起雷达界的重视,混沌信号是一种类随机性信号,具有极强的抗干扰性和极低的截获概率。研究了混沌在雷达中的应用,分析了混沌理论在雷达波形设计、信号检测与估计、目标识别、及杂波分析与建模等领域内的发展情况,指出在雷达应用技术中引入混沌理论是雷达技术发展的必然趋势,并预测了混沌理论与雷达技术研究发展的前景。图0表0参16TN952008011693目标微动特性研究进展/庄…     

多传感器目标的模糊识别

根据模糊理论，采用信息融合技术和模糊识别技术，讨论了在多类传感器网内进行多目标模糊识别的一般原理和方法。     

雷达目标识别技术及其新进展

从雷达目标识别技术作为现代雷达的一个重要发展方向出发，对雷达目标识别的几种主要方法即目标运动轨迹特征识别法、回波幅度起伏特性识别法、多频雷达回波识别法、极点识别法、斜升响应识别法和极化识别法等作了阐述，最后对雷达目标识别技术的新进展即波形综合法、雷达成象技术及神经网络在雷达目标识别中的应用作了展望。     

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）.     

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     

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-     

云计算专题（英文）

正Cloud computing is a novel computing paradigm that utilizes remote cloud resources to achieve a high-performance computation.Cloud provides infrastructure,platform and software as different on-demand services.China has made remarkable progress in cloudbased products and operating system technology.The government,enterprises and research institutions are all active in the development of cloud computing-related projects.Despite the progress,many important problems     

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