分布式系统

A self-learning algorithm is provided for getting optima in a distributed system without a central task assigner.

本文提出了分布式系统中各独立结点根据自身状态和系统反馈进行自适应，以使系统达到最优状态的一种机制。

Mobility constraints break key assumptions associated with distributed computing. As a result, most traditional mechanisms and algorithms have low performance in mobile environment.

然而，移动性约束打破了传统的分布式系统对计算环境的假定，使得传统的数据访问技术和算法在性能和可用性等方面不能满足移动计算系统的要求。

First of all, it introduces middleware technology and distributed objects technology, and the application in distributed system.

首先，介绍中间件技术与分布式对象技术及二者在分布式系统中的应用。

The general objective of the thesis is to develop a language-based foundational theory of security for mobile and distributed systems, and this thesis focus on the following four interrelated aspects. Firstly, aiming at the access control, a type system with security levels is proposed and the Subject Reduction Theorem under labelled transition system is proved.

针对安全模型面临的困难与挑战，本研究从分析移动系统安全的实质出发，对系统安全进行高度的抽象，使用π-演算及其类型系统为理论工具为分布式系统安全建模，提出对安全模型的定义、规范、分析与实现都借助程序语言的理论、技术与方法的一体化路线，研究基于程序设计语言的安全模型。

In reference to the features of distributed system, this paper provides a view of designing distributed processing concurrent operation RRM protocol in networks, and implementing and using it in a Local Area Network.

本文综合分布式系统的特点，设计了在网络环境下的分布式处理并行操作RRM协议，并将它在局部网络上具体实现与应用。

The control system of Shanghai Synchrotron Radiation Facility is an EPICS-based distributed system.

预制研究中的上海同步辐射装置控制系统是一个基于Ethernet和DeviceNet现场总线的分布式系统，设备级控制是建立该系统的重点和难点之一。

In research and development of the system, mainly concluding key technologies of software-hardware environment analysis, no adapter interlink, terminal simulation, communication, sharing resources, binary file transfer algorithm , concurrent process, database-dumping and sharing, and to accomplish the basic a software design of E-classroom by adopting distribution system concept in minicomputer side , to accomplish the main software design of E-classroom by Winsock in microcomputer side , to study teacher software integration , try to realize transparent communication in the highest limit and sharing resources in the fullest extent , at last, weak and counter measure of the system is given, and the overall objective of heterogeneous computer is given to try to provide resemble system development with theory guide.

该系统的研究与设计过程中主要涉及软硬件环境分析、异型机无网卡互连、终端仿真、异型机通信、资源共享、二进制文件传输算法、并发进程、数据库转储与共享等关键技术，利用DSM分布式系统的概念完成了小型机部分电子教室的基础性软件设计，利用Winsock完成了微型机部分电子教室的主要功能模块，利用并发进程的概念研究了教师机软件的集成问题，使异型机用户之间达到最大限度的透明通信及充分的资源共享，给出了异构电子教室的弱点及解决对策，提出了系统的总体目标，力争为类似系统的研制提供理论指导。

This thesis is focus on integration technology of heterogenous distributed system of simulation, based on the demand of Hardware In the Loop Simulation of war industry.

本文针对军工领域的实时半实物仿真系统对异构分布式系统集成的要求，研究了实时分布仿真系统异构集成的体系结构、主要集成技术、和所使用的分布中间什。

Netease uses the distributed system engine with banner international, shorten considerably answer time while, more reframed the frame flow of mail system, those who raised an interface is friendly spend and of the system use a sex easily.

网易采用国际领先的分布式系统引擎，大幅缩短响应时间的同时，更重构了邮件系统的框架流程，提高了界面的友好度和系统的易用性。

Then, we take forward to the Distributed Merging Algorithm, a hierarchical structure to discover the stream synopsies from all leaves to root node, through setting the precision gradient to optimize the communication load and overhead of distributed system.

并提出了基于Lossy Counting算法的、分布式的合并算法DMA的一种分层结构来发现从叶子结点直至根结点的概要结构，并通过设置精确梯度使网络数量最小及数据中心和网络链接所消耗的计算资源最小来优化分布式系统的通信负载。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。