近年来Peer to Peer网络架构得到迅速发展,针对这种架构提出了与传统"客户 服务器"架构不同的一种安全信任模型。它能够根据网络的"建议"值建立节点间的信任关系,更好地保证网络的安全性和避免恶意攻击。同时给出...近年来Peer to Peer网络架构得到迅速发展,针对这种架构提出了与传统"客户 服务器"架构不同的一种安全信任模型。它能够根据网络的"建议"值建立节点间的信任关系,更好地保证网络的安全性和避免恶意攻击。同时给出了求解信任值的数学模型和具体算法,并对信任模型的安全性能进行了理论评测。展开更多
We are interested in providing Video-on-Demand (VoD) streaming service to a large population of clients using peer-to-peer (P2P) approach. Given the asynchronous demands from multiple clients, continuously changing of...We are interested in providing Video-on-Demand (VoD) streaming service to a large population of clients using peer-to-peer (P2P) approach. Given the asynchronous demands from multiple clients, continuously changing of the buffered contents, and the continuous video display requirement, how to collaborate with potential partners to get expected data for future content delivery are very important and challenging. In this paper, we develop a novel scheduling algorithm based on deadline- aware network coding (DNC) to fully exploit the network resource for efficient VoD service. DNC generalizes the existing net- work coding (NC) paradigm, an elegant solution for ubiquitous data distribution. Yet, with deadline awareness, DNC improves the network throughput and meanwhile avoid missing the play deadline in high probability, which is a major deficiency of the con- ventional NC. Extensive simulation results demonstrated that DNC achieves high streaming continuity even in tight network conditions.展开更多
售电侧市场环境逐渐开放和分布式能源(distributed energy resources,DER)的发展给微网(micro-grid,MG)运行带来了机遇与挑战。端对端(peer to peer,P2P)电能交易可以优化能源结构,充分发挥分布式能源的优势,提高能源系统的效率。文章...售电侧市场环境逐渐开放和分布式能源(distributed energy resources,DER)的发展给微网(micro-grid,MG)运行带来了机遇与挑战。端对端(peer to peer,P2P)电能交易可以优化能源结构,充分发挥分布式能源的优势,提高能源系统的效率。文章以微网P2P电能交易系统为研究对象,在考虑我国现有电力改革政策的前提下,在稳态层面提出亟需解决的三大关键问题:分布式能量流如何优化传输、高效通信系统如何建立、P2P电能交易过程中涉及到用户支付问题如何解决。就这些问题,从能量流、信息流、货币流的角度,阐述微网端对端电能交易系统相关分析的解决办法,从工程角度分析新形势下微网P2P电能交易过程中的关键设备及核心软件平台,为推动我国分布式发电市场化交易及落地提供一些建议。展开更多
基金Project (No. DAG05/06.EG05) supported by the Research GrantCouncil (RGC) of Hong Kong, China
文摘We are interested in providing Video-on-Demand (VoD) streaming service to a large population of clients using peer-to-peer (P2P) approach. Given the asynchronous demands from multiple clients, continuously changing of the buffered contents, and the continuous video display requirement, how to collaborate with potential partners to get expected data for future content delivery are very important and challenging. In this paper, we develop a novel scheduling algorithm based on deadline- aware network coding (DNC) to fully exploit the network resource for efficient VoD service. DNC generalizes the existing net- work coding (NC) paradigm, an elegant solution for ubiquitous data distribution. Yet, with deadline awareness, DNC improves the network throughput and meanwhile avoid missing the play deadline in high probability, which is a major deficiency of the con- ventional NC. Extensive simulation results demonstrated that DNC achieves high streaming continuity even in tight network conditions.
文摘售电侧市场环境逐渐开放和分布式能源(distributed energy resources,DER)的发展给微网(micro-grid,MG)运行带来了机遇与挑战。端对端(peer to peer,P2P)电能交易可以优化能源结构,充分发挥分布式能源的优势,提高能源系统的效率。文章以微网P2P电能交易系统为研究对象,在考虑我国现有电力改革政策的前提下,在稳态层面提出亟需解决的三大关键问题:分布式能量流如何优化传输、高效通信系统如何建立、P2P电能交易过程中涉及到用户支付问题如何解决。就这些问题,从能量流、信息流、货币流的角度,阐述微网端对端电能交易系统相关分析的解决办法,从工程角度分析新形势下微网P2P电能交易过程中的关键设备及核心软件平台,为推动我国分布式发电市场化交易及落地提供一些建议。
基金国家高技术研究发展计划(863)(the National High- Tech Research and Development Plan of China under Grant No.2005AA1032)中国下一代互联网示范项目(the China Next Generation Internet(CNGI) under Grant No.CNGI-04-15-2A)
