基于IXP2400网络处理器的高速包过滤的研究

包过滤的效率极大地影响防火墙的性能。提出了一个基于INTEL IXP2400网络处理器高效的包过滤方案。此方案通过动态规则表,静态规则树及哈希硬件加速单元实现对包过滤的优化,使得基于INTEL IXP2400的防火墙能真正达到千兆线速。     

内容寻址网络CAN研究

新一代结构化可扩展P2P系统采用支持分布式哈希表(Distributed Hash Table,DHT)的路由算法。CAN（Content-Addressable Network）在d维虚拟坐标空间上利用DHT来实现内容定位,具有较好的可扩展性、容错性和完全自组等特点。介绍了CAN的原理,重点分析了CAN的构建和路由算法,并讨论了CAN算法的几种改进策略。     

在CICQ交换结构下实现分布式的输入排队DRR分组公平调度

传统的基于crossbar的输入排队交换结构在提供良好的QoS方面存在很大的不足,而CICQ(combined input and crosspoint buffered queuing)交换结构与传统的交换结构比,不但能在各种输入流下提供接近输出排队的吞吐率,而且能提供良好的QoS支持。基于CICQ结构,提出了在输入排队条件下实现基于流的分布式DRR分组公平调度算法的方案,并通过仿真验证了这一方案的有效性。     

Partial cooperative spectrum sensing schedule in cognitive network

Cognitive radio has emerged as a promising technology for maximizing the utilization efficiency of the limited spectrum resources while accommodating the increasing amount of services and applications in wireless networks. One of the most important and critical components of the cognitive radio is spectrum sensing and accordingly, detection of primary users. Considering the hardware constraints existing in cognitive devices, based on the coarse estimation of channel occupancy, partial cooperative spectrum sensing with adaptive spectrum schedule scheme is proposed to increase the possibility to discover more spectrum opportunities promptly. Simulation results show the gain of sensing performance and the energy-saving feature of partial spectrum sensing. Special security scheme is designed to protect the reliability of sensing result from the false message attack. For the scenarios tested, the proposed scheme is shown to increase opportunities by up to 15 percent.     

基于虚拟现实的电子沙盘仿真技术研究

对虚拟现实技术、计算机三维图形技术、OpenGL、立体图像生成与显示技术进行了研究,利用计算机三维图形技术和立体显示技术实现沙盘的三维仿真立体沉浸式展示。     

SAP与FMIS融合系统的设计应用研究

文章主要通过SAP与FMIS系统融合问题,重点分析介绍了融合系统的设计方案和实施,解决了SAP与FMIS系统数据传递、财务数据差异等问题。为以后其他系统与SAP系统融合提供了重要借鉴意义。     

SAP与物采系统融合衔接流程设计

本文主要介绍了物采系统,重点分析了SAP与物采系统融合衔接中的问题,针对这些问题提出了相应的融合衔接设计了,解决了SAP与物采系统数据传递,从而形成了物资采购从谈价议价、招标、反向拍卖到产生采购订单付款一个完整科学管理信息流程,满足了物资采购管理和采购交易为一体的业务管理需求,为以后其他系统与SAP系统融合提供了借鉴意义。     

Proceedings of the seventy-third annual business meeting: Report of the Recording Secretary.

Presents the Report of the Recording Secretary regarding the Proceedings of the Seventy-Third Annual Business Meeting. The Secretary reports that it is particularly difficult this year to pick out a very few items for report because Council, for good reasons, completed only about 40% of its agenda. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Designing networks with compact routing tables

Classes of network topologies are identified in which shortest-path information can be succinctly stored at the nodes, if they are assigned suitable names. The naming allows each edge at a node to be labeled with zero or more intervals of integers, representing all nodes reachable by a shortest path via that edge. Starting with the class of outerplanar networks, a natural hierarchy of networks is established, based on the number of intervals required. The outerplanar networks are shown to be precisely the networks requiring just one interval per edge. An optimal algorithm is given for determining the labels for edges in outerplanar networks.The research of this author was supported in part by the National Science Foundation under Grant DCR-8320124, and by the Office of Naval Research on contract N 00014-86-K-0689.The research of this author was supported in part by the National Science Foundation under Grant DCR-8320124.     

数控程序解释软件芯片的研制与开发

本文阐述了开发的通用数控机床ＮＣ程序解释软件芯片的体系结构，内外接口，使用方法，检索机制及其Ｃ＋＋实现，同时我们还讨论了描述软件芯片的有关技术。