基于网络交换结构的多DSP综合处理平台分析

数字化技术的发展使计算机网络在各个领域得到了广泛运用。其中,多DSP综合处理平台是一个典型代表,其由分布式存储和并行工作站组成。文中从一个实际的服务器环境出发,分析了其网络交换结构对DSP平台处理性能及数据处理能力的影响,并给出了基于DSP的网络交换结构优化方案。

软交换技术及其应用分析

软交换技术是下一代网NGN的核心技术,其能兼顾各种接入技术,完成多种通信业务的交换。介绍了软交换的概念,分析了软交换技术在网络中的功能;结合软交换的网络结构,分析了不同网络层软交换技术涉及到的主要设备及其相关功能;基于软交换独特的协议功能,分析了软交换的交换原理。软交换技术已经广泛应用于与通信技术相关的各行各业,通过应用实例表明了其技术上的优越性和适用性,充分说明了软交换技术有着不可估量的发展前景。

软交换技术在现代企业中的应用

通过对唐钢传统电话交换系统现状和需求的分析,提出传统的电路交换系统已无法满足钢铁行业多种业务发展的需求,通过对软交换技术的功能和优势的分析,提出了唐钢软交换的系统架构和建设模式,结合唐钢的电话业务与网络业务现状,做出了唐钢软交换实施的方法,最后对方案进行了总结。

基于自动交换光传输网络的网络结构体系研究

自动交换光传输网络的核心技术在于通过引入独立的控制平面来提高网络的智能化程度,它对传统传输网络的结构和功能都有巨大的影响。对自动交换光传输网络的网络结构体系技术进行全面、系统地研究。

自选路由网的路径重选

本文提出了自选路由网路径重选的一种方案，并给出了相应的性能分析。

A Simultaneous Optimization Method for the Structure and Compo-sition Differences of a Mass Exchange Network

This article presents a new method to calculate the composition differences （e） for tar g.etin.g the minimum total annualized cost （TAC） of a mass exchange network （MEN）,which is based on the combination of composition interval diagram （CID） with mathematical programming.The total cost target consists of the capital cost of the process units and the operating cost for mass separating agents （MS.As）. The value of total cost varies considerablv with the composition differences, so the values of e should be optimized in order to obtain minimum TAC of a MEN. This articleconsiders ε as a set of unequal variables for each equilibrium equation of a rich-lean stream pair, employing them to build the CID and mathematical model, which optimizes the structure and composition differences simultaneously. Two examples are applied to illustrate the proposed method and the results demonstrate that the approach introduced by this article is simpler and more convenient than the methods in previous literatures.

An Explicit Solution for Thermal Calculation and Synthesis of Super-structure Heat Exchanger Networks

For the optimal design of a heat exchanger network,the inlet and outlet stream temperatures of each heat exchanger in the network should be known.An explicit analytical solution of stream temperatures of an arbi-trary connected heat exchanger network was introduced,which is suitable for the thermal calculation of heat ex-changer networks.For the heat exchanger network synthesis,this solution was further developed and coupled with the stage-wise superstructure heat exchanger networks.The new calculation procedure reduced the computer mem-ory requirement dramatically.On the basis of this solution,a mathematical model for synthesis of heat exchanger networks with genetic algorithm was formulated,which is always feasible and no iteration is needed.Two examples were calculated with the proposed approach and better results were obtained.

Research on Testing Technologies of Network System in Smart Substations

The network structures of smart substations and the characteristics of industrial Ethernet switches are analyzed.The testing technologies of network systems based on smart substations are specifically elaborated.A viewpoint is proposed that special testing policy&method of smart substation networks should be followed,so that the results can reveal the real network data exchange performance of the whole station.This view ensures the safety and stability of smart substations and lays a foundation for future upgrades and expansions.

Software-Defined Optical Data Centre Networks

Based on the analysis of data centre(DC) traffic pattern, we introduced a holistic software-defined optical DC solution. Architecture-on-Demand based hybrid optical switched(OPS/OCS) data centre network(DCN) fabric is introduced, which is able to realise different inter-and intra-cluster configurations and dynamically support diverse traffic in the DC. The optical DCN is controlled and managed by a software-defined networking(SDN) enabled control plane to achieve high programmability. Moreover, virtual data centre(VDC) composition is developed as an application of such softwaredefined optical DC to create VDC slices for different tenants.

Network Structure Expert System and Operation Optimization

It is proposed that double level programming technique may be adopted in synthesis strategy. Optimization of heat exchanger network structural configuration (the master problem) may be solved at the upper level, leaving the rest operating conditions( the slave problem) being optimized at the lower level. With the uniqueness in mind, an HEN synthesis expert system may be employed to address both the logical constraints and the global operation parameters′ optimization using enhanced sequential number optimization theory.Case studies demonstrate that the synthesis strategy proposed can effectively simplify both the problem solving and the synthesis process. The validity of the strategy recommended is evidenced by case studies′ results compared.

Extended consensus analysis of multi-agent systems with switching topologies

Theoretical analysis of consensus for networked multi-agent systems with switching topologies was conducted.Supposing that information-exchange topologies of networked system are dynamic,a modified linear protocol is proffered which is more practical than existing ones.The definition of trajectory consensus is given and a new consensus protocol is exhibited such that multi-agent system achieves trajectory consensus.In addition,a formation control strategy is designed.A common Lyapunov function is proposed to analyze the consensus convergence of networked multi-agent systems with switching topologies.Simulations are provided to demonstrate the effectiveness of the theoretical results.

电信业务及其传输技术

Y2001-62866-673 0121028点对多点 ATM 可用比特率业务的基于速率的拥挤控制=Rate-based congestion control for multipoint-to-pointATM ABR service[会,英]/Zhang,L.& Zhao.P.//2000 International Conference on Communication Tech-nology Proceedings Vol.Ⅰ of Ⅱ.—673～676(HC)