A Real-Time TCP Stream Reassembly Mechanism in High-Speed Network

With the continual growth of the variety and complexity of network crime means, the traditional packet feature matching cannot detect all kinds of intrusion behaviors completely. It is urgent to reassemble network stream to perform packet processing at a semantic level above the network layer. This paper presents an efficient TCP stream reassembly mechanism for real-time processing of high-speed network traffic. By analyzing the characteristics of network stream in high-speed network and TCP connection establishment process, several polices for designing the reassembly mechanism are built. Then, the reassembly implementation is elaborated in accordance with the policies. Finally, the reassembly mechanism is compared with the traditional reassembly mechanism by the network traffic captured in a typical gigabit gateway. Experiment results illustrate that the reassembly mechanism is efficient and can satisfy the real-time property requirement of traffic analysis system in high-speed network.     

一种分布式实时支撑平台的研究与实现

针对一种建立在高可靠、高性能结点和双冗余通信网络上的实时容错分布式系统，将运行在实时应用程序和系统硬件平台之间的分布式实时支撑平台作为研究系统实时性的重点，从其实现的难点出发，分析了分布式实时支撑平台的技术路线、可预测性机制和具体实现方案，并扩展了该平台对于实时容错任务的调度支持。     

分布式系统中的一种动态负载分配策略及实现

根据分布式系统的特点，对分布式系统的负载分配进行了较详细的分析，并在此基础上给出了任务动态调度的结构图，提出了一种动态负载分配策略及实现方法，并结合实际研究课题给出了较具体的实现过程。     

三峡雾航预警管理机制

阐述三峡雾情特点及其对航运的影响,认为应建立“二级预警、二级发布”的三峡雾航预警机制,提出加强三峡雾航安全预警管理对策：提高雾情预报水平;建立雾航安全应急联动机制;强化水上交通从业人员雾航安全意识;增强船舶雾航适应能力;加强重点河段雾航预警监控站点建设。     

并行EPROM引导加载在双DSP系统中的实现

介绍了双DSP-TMS320VC5409系统在微计算机方式下EPROM引导加载的实现。阐述了DSP的EPROM引导加载的原理、TMS320VC5409和EPROM-27C256的硬件接口设计以及具体的代码实现。     

ZG25MnNi中非金属夹杂物的控制

阐述了我国铁路车辆用铸钢ZG25MnNi中非金属夹杂物的产生机理和控制方法。