机群

Limited bandwidth and high delay make application very difficult to archive good performance. In this dissertation, we have developed optimal collective communication library CAMPI for campus area based on MPI collective communication operation and have taken hierarchical network structure into account. In CAMPI, the number of clusters in system must be specified. We also must show which process belongs to which cluster.

本文充分考虑到网络的等级体系结构，针对不同的网络情况，在MPI集合通信的基础上提出了基于校园网系统的优化集合通信操作库CAMPI(campus area message passing interface)，它建立在MPI操作库之上，在CAMPI操作库中需要指定整个系统中有多少个机群，哪个进程属于哪个机群，CAMPI操作库在MPI之上实现，系统中必须首先安装MPI实现，例如最常用的MPICH。

Based on the vulnerability analysis to the carrier plane group and aimed to the issue of quantitative,the damage effectiveness of submunition against carrier plane group is analyzed,the model of pixel-simulation is established,and the computer simulating calculation of damage effectiveness of the shipboard aircraft group under the attacking of many missiles is carried out.

是子母弹对航空母舰毁伤效果分析的第三部分。在对舰载机群进行易损性分析的基础上，针对子母弹战斗部攻击舰载机群毁伤效果的定量分析问题，提出了基于像素仿真的模拟方法，实现了多弹攻击下的舰载机群毁伤效果的计算机模拟计算。本研究对航空母舰毁伤效果的评估和火力计划方案的制定具有重要指导意义

Evaluating the damage efficiency of the carrier plane groups under the attacking of multiple-submunition is a complicated problem. A rapid method was provided to evaluate the damage efficiency issue based on vulnerability analysis of the carrier plane group and using the pixel-simulation method, and a computation simulation model of the carrier plane groups under the attacking of submunition was established.

对于采用子母弹攻击航空母舰舰载机群的毁伤效果分析问题，存在相当大的难度，为对子母弹攻击舰载机群毁伤评估提供一个快速、初步的结果，在对舰载机群进行易损性分析的基础上，采用像素仿真的模拟方法，实现了多弹攻击下舰载机群毁伤效果的计算机模拟计算。

This paper is based on the development practices on the Dawning 3000 MPICH-BCL3 project.

机群的发展与机群并行计算环境的发展是分不开的。

This dissertation is based on research of Dawning 4000 and summarizes research in the Configuration Management System for Clusters.

本文以曙光4000机群系统为科研背景，以机群操作系统中的配置管理为具体对象，进行了广泛而深入的研究。

This paper is based on research of Dawning 4000 and summarizes research in the Monitoring System for Large-Scale Clusters.

本文以曙光4000A 机群系统为科研背景，以机群操作系统中的侦测系统为具体对象，进行了广泛而深入的研究。

In terms of memory hierarchy, we investigated how to improve the cache hit rate and localize data according to the characteristics of cache, master memory, local disk and remote disk in cluster systems. As for communication, features of cluster systems and different cluster internal networks are examined. Two popular parallel programming models - message passing model and share memory model - are analyzed in terms of how do they affect the cluster performance and how can we improve the cluster performance.

在处理器层面，分析了现代处理器中常用的一些技术，包括超线程技术、超长指令技术和NUMA架构等，对不同特点的程序的性能影响和如何充分利用处理器中的一些技术提升性能；在存储层次上，结合机群系统上Cache、主存、本地辅存及网络存储的存储层次的特点，分析了数据局部性、Cache命中率等对性能的影响以及提出如何提高数据局部性；通讯系统层面分析了不同机群通讯系统及不同机群通讯网络的特点；在编程模式方面，分析和比较了目前最常用两种并行编程模式--消息传递编程模式和共享存储编程模式，在机群系统上对性能的影响因子以及提出如何提高性能的方法。

In cluster, the performance of an interconnection network exhibits significant effect on that of the whole cluster system.

在机群系统中，机群的互连网络性能对整个机群系统的性能有着至关重要的影响。

Second, it models and simulates dynamically the parallel, asynchronous, distributed and concurrent workflow of machinery of cluster with intuitionistic and visual figure, and give the effective controlling strategy of optimal collocating and dynamic attemperation, be dead against the asynchronism and concurrent character of machinery of cluster, which result from that MAS loosens the restricting for centrality, programming and gradation controlling and offers the mechanism of separated controlling, meeting an emergency and parallel disposing.

由于多智能主体技术放松了对集中式、规划、顺序控制的限制，提供了分散控制、应急和并行处理，本文针对基于多智能主体的机群工作流的异步性和并发性采用Petri网技术通过直观、形象的图形，对并行、异步、分布、并发的机群工作流进行了建模分析和动态模拟，并提出了机群的优化配置和动态调度的控制策略。3。

The proposal of a new parallel system architecture, which combines the advantages of both NUMA and cluster, the usability as the main focus of system design, its scalability, high availability, and flexibility to configure and re-construction being the aim of the system.

提出了一种新的体系结构，即机群NUMA系统，这种新的系统很好地结合了机群和NUMA机器的特点，以好用性为核心，以可扩展性、高可用性和系统的灵活动态可配置和重构为目标，很好地结合了机群系统和传统NUMA系统的优点。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷