国家自然科学基金(60773137)

作品数:7被引量:8H指数:2
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相关作者:陈德元陈运德张灿李栋刘晓敏更多>>
相关机构:中国科学院研究生院信息安全国家重点实验室更多>>
相关期刊:《Chinese Journal of Electronics》《计算机仿真》《Science China(Information Sciences)》更多>>
相关主题:JOINT中音视频同步音视频同步TURBO_CODES更多>>
相关领域:自动化与计算机技术电子电信更多>>
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A bidirectional-transformation-based framework for software visualization and visual editing
《Science China(Information Sciences)》2014年第5期143-165,共23页HE Xiao HU ChangJun MA ZhiYi SHAO WeiZhong 
supported by National Basic Research Program of China(973 Program)(Gant No.2013CB329606);National High-tech R&D Program of China(863 Program)(Gant No.2012AA011202);National Key Tech-nology Research and Development Program of the Ministry of Science and Technology of China(Grant No.2011BAK08B04);National Natural Science Foundation of China(Grant Nos.61300009,61272159,60773137,60573112);Beijing Natural Science Foundation(Grant No.4122036);China Postdoctoral Science Foundation Funded Project(Grant No.2013M540050);Fundamental Research Funds for the Central Universities(Grant No.FRF-TP-13-014A)
Software visualization and visual editing are important and practical techniques to improve the development of complex software systems. A challenge when applying the two technologies is how to realize the corresponde...
关键词:model-driven development bidirectional transformation software visualization visual language visual editing 
Joint Source Channel safety and Virtual User Identification Method for Wireless Ad Hoc Networks
《Chinese Journal of Electronics》2011年第2期273-277,共5页TU Guofang ZHANG Can FAN Lian GAG Shaoshuai LV Shuwang ZHAO Heping 
This work is supported by the National Natural Science Foundation of China Key Project (No.61032006, No.60773137, No.60972067), Award Foundation of Chinese Academy of Sciences (No.2069901).
In this paper, a novel joint source channel safety and virtual user identification method for DS- CDMA ad hoc networks is proposed. Previous algorithms for DS-CDMA ad hoc networks mainly concentrated on how to solve p...
关键词:Ad hoc networks Joint source channel safety Virtual user identification. 
Joint Source-Channel En/Decoding Based on a New Symbol-Level Joint Trellis被引量:2
《Chinese Journal of Electronics》2011年第1期114-120,共7页TU Guofang LIU Jianjun ZHANG Can WANG Qiang 
This work is supported by the National Natural Science Foundation of China (No.61032006, No.60773137, No.60972067), Award Foundation of Chinese Academy of Sciences (No.2069901).
A joint source-channel en/decoding scheme based on a new symbol -level joint trellis for the Variable length coding (VLC) is presented. In the encoder part, the serial VLC and a Recursive systematic convolutional (...
关键词:Joint source-channel decoding Variable length coding Turbo codes Iterative decoding Residual source redundancy 
空间多媒体通信中音视频同步技术研究被引量:4
《计算机仿真》2010年第6期130-134,共5页陈运德 张灿 陈德元 
国家"863"计划项目(2007AA0Z297);国家自然科学基金项目(60773137)
空间多媒体通信具有丢包率高、传输时延长、抖动大、资源受限等特点。为满足音视频同步QoS要求,提出了一种基于RTP/RTCP协议的音视频实时同步算法,以音频流为主媒体流,通过控制视频播放实现音视频同步。该算法无需全网同步时钟与反馈机...
关键词:空间多媒体通信 音视频同步 实时传输协议/实时传输控制协议 
面向空间通信不平等差错保护的联合信源信道编解码方法
《中国科学院研究生院学报》2009年第5期663-669,共7页刘晓敏 凊国防 
国家"863"计划项目(2007AA0Z297);国家自然科学基金项目(60773137)共同资助
提出了一种面向空间通信不平等差错保护的联合信源信道编解码方法.该方法采用一种可逆编解码方法对直流系数进行重点保护,即对直流系数编码输出码流进行二进制游程编码,并采用可逆变长码对游程长度进行编码.对重要性较低的交流(AC)系数...
关键词:不平等差错保护 信源信道编解码 可逆编解码 错误扩散 
空间通信网QoS性能测量与可视化被引量:2
《中国科学院研究生院学报》2009年第5期670-680,共11页李栋 陈德元 凊国防 
国家"863"计划项目(2007AA0Z297);国家自然科学基金项目(60773137);中国科学院研究生院院长基金(O85101HM03)共同资助
将QoS性能测量与层次化动态雷达图可视化方法相结合,提出了一种空间通信网QoS性能仿真新方法,构建了仿真系统平台.同时,在分析空间通信网QoS性能参数的基础上,提出了一种改进的双分组对路径带宽测量方法,并利用空间通信网仿真系统验证...
关键词:空间通信网 QoS性能测量 层次化动态雷达图 路径带宽 
Object Tracking and QoS Control for Wireless Sensor Networks
《Chinese Journal of Electronics》2009年第4期724-728,共5页TU Guofang TU Guofang GAO Shaoshuai GAO Shaoshuai ZHANG Can ZHANG Can 
This work is supported by the National Natural Science Foundation of China (No.60773137, No.60573112), the National 863 Project (No.2007AA01Z297), and the National Foundation (No.1320061262).
Object tracking and the Quality of services (QoS) control is one of the key issues in wireless sensor networks. In order to track objects and provide informa- tion about the location, trajectory and identity for eac...
关键词:Multi-sensor network Video object tracking Wavelet fractal interpolation QoS control. 
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