查询词典 distributed system

Then, after reviewing former research, we combine the solution of industry and academy, a new architecture called BWADM based on the researches above is proposed, it is a distributed data mining system based on Web services and Agent in Electronic commerce environment. Web service composition rules and execution of Web service composition are discussed. These modules are introduced detailedly in Electronic commerce environment; there are algorithm management module, control center module, algorithm database module and model representation module. Lastly, a prototype system of distributed data mining is given in Electronic commerce.

在此基础上，结合业界和学术界对Web服务和移动Agent的研究成果，将Web服务和Agent最新技术引入了电子商务环境中分布式数据挖掘，提出了电子商务环境下基于Web服务和移动Agent技术的数据挖掘架构BWADM，并论述了组合服务规范与组合服务的执行，具体阐述了此架构的数据预处理组件、算法管理组件、控制中心组件、算法库组件和模型表示组件。

Chapter 1 discusses multiple parameters simultaneous estimation of a two-dimensional distributed parameter system; First, the distributed parameter system is transformed by applying a Laplace transform; Then by defining the objective function combined with the principle of optimal control, the problem of parameter estimate is converted into the problem of optimal control.

第一章讨论了一类二维分布参数系统的多参数同步辨识问题。首先利用Laplace变换对原系统方程进行了转换；然后结合最优控制原理定义目标泛函，将参数辨识问题转化为最优控制问题。

The other aspect of the finit dimeasional robust adaptive control on a class of stochastic distributed parameter system in this paper was based on the above mentioned ground and researched the class of stochastic distributed parameter system which operator generated a compect self-adjoint semigroup or had point spectral in a stochastic developing equation of one order.

最优炉温参数是由性能指标表示为关于控制类中参数的函数通过优化求得的，而这个函数又是通过在某些已知炉温控制规律下，求钢坯温度分布和性能指标值而获得的。

In this paper, taking one 1900t/h supercritical pressure once—through boiler installed in East boiler company as subject investigated, analyzing the structure and characteristic of unit, from the mechanism of units, based on the law of quality conservation, energy conservation and momentum conservation, having Lagrange fluid particle tracing idea in hydrodynamics field application in analyzing of unit operational characteristic, author build up the nonlinear distributed parameter general dynamic mathematical model of single-phase heating surface or diphase heating surface in the steam-water system for supercritical pressure once—through boiler, which is suitable numerical calculation and simulation for large scale disturbance and full working conditions change, and enough materializing distributed characteristic of thermodynamic parameter in process and time lag characteristic of energy transportation in tache. The transient responses curve of the system main variables under several disturbance are computed by Computer Simulation for the model, and theoretical analysis shows that the simulation results are reasonable.

本文以东方锅炉集团公司的一台1900 t /h超临界压力直流锅炉为研究对象，在分析机组结构和特性的基础上，从机组的工作机理出发，以质量、能量、动量守恒定律为依据，将流体力学领域中的Lagrange流体质点追踪思想用于机组运行特性的分析上，建立了适用于超临界压力直流锅炉汽水系统单相、双相受热面的非线性分布参数通用动态数学模型，该模型适合于大扰动全工况变化的数值仿真计算，充分体现了过程热力参数的分布特性和环节中能量输送过程的时滞特性，并对模型通过计算机仿真得出各种扰动下系统主要变量的响应曲线，从理论上分析了仿真结果的合理性。

Its software development tool are very important to the applications of virtual reality technology because of the rapid development of network technology Being aimed of the shortcoming that the development for the distributed parallelism of simulation computing unit is not enough and formal in current distributed virtual environment systems, we study the modeling language of virtual environment and the system architecture of distributed virtual environment in a new view point, build a complete extensible theory framework novelly for the research of virtual environment technology.

本文针对当前分布式虚拟环境系统对仿真计算单元的分布并行性开发不够充分和规范的缺点，从一个全新的角度来研究虚拟环境的建模语言及其分布式虚拟环境的系统结构，开创性地为虚拟环境技术的研究建立了一个全面可扩展的理论框架。

A case ofapplication of CAN bus on the distributed automatic system ofsubstation is illustrated.To meet the need ofautomatic controlsystem ofsubstation,a network is necessity because ofthe distributed control units ofthe substation.To shortenthe developed period of the system,an interface bridge between the RS232 and CAN bus is made.The result oftest run shows thatthe requirements ofsystem can be satisfied by the project.

摘 要：对一个把CAN总线应用到分布式变电所自动化系统的例子进行了分析，对于分布式变电所自动化系统来说，通信网络的效率、安全性和实时性具有重要意义，在实际工作中，通过在现行测量、控制和保护单元外增加一个RS232和CAN总线之间的转换器，构成变电所自动化系统的现场总线网络，试运行情况表明：该方案完全能满足系统的要求。

In order to improve resistive capability of computer and network system,based on Multi-agent,a distributed network intrusion detection model and a distributed network intrusion detection system are presented.

针对当前形势，为了提高计算机及网络系统的防御能力，提出了一种基于多主体的分布式网络入侵检测模型，研究了基于多主体的分布式网络入侵检测系统。

It may virtualize and integrate the I/O resources distributed on multiple computer nodes, present a uniform virtual I/O space for the upper guest operating system, carry out the uniform management and utilization of distributed I/O resources for the guest operating system.

当前大规模计算机技术的发展呈现两大趋势，scale-out和scale-up.scale-out系统I/O资源管理复杂、使用效率

Based on the introduction of HLA, in combination with the new characteristic of Air-Sea Combat, naval aviation distributed striking simulation system is designed, the correlative federates and AEW CGF is exploited, which is valuable to develop the distributed operation simulation system.

文中运用目前流行的分布式交互仿真思想，设计了分布式海军航空兵突击作战仿真系统，并对相关联邦成员以及预警机CGF进行了开发，对分布式作战系统的开发具有参考价值。

First, under deeply study of measurement and control tasks whose every status can be foreknown in distributed measurement and control system, a static tasks matching and scheduling algorithm for distributed measurement and control system by using genetic algorithms is introduced.

本文首先对分布式测控系统中各状态可以预知的测控任务进行了研究，提出了一种基于遗传算法的分布式测控系统静态任务分配与调度算法。

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。