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基于知识的分布式设计流管理技术研究 被引量:2
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作者 郭阳 李思昆 卢先兆 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 1998年第3期273-279,共7页
在CAD集成框架中,建立高水平的设计流管理专家系统是解决分布式设计流管理的有效技术途径.本文提出一种通过建立分布式设计流管理知识库,实现设计流管理的自动化的方法.我们以设计流图为基础,采用基于扩展Petri网的理论模... 在CAD集成框架中,建立高水平的设计流管理专家系统是解决分布式设计流管理的有效技术途径.本文提出一种通过建立分布式设计流管理知识库,实现设计流管理的自动化的方法.我们以设计流图为基础,采用基于扩展Petri网的理论模型描述设计流的动态行为,并将该模型与基于知识的方法相结合,实现了基于知识的分布式设计流管理系统,它能在较高层次管理在分布、异构设计环境下的设计过程.该设计流管理系统在YHCIF集成框架中得到了成功的应用. 展开更多
关键词 集成框架 设计流管理 知识库 CAD
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CAD Framework中基于知识的设计流管理 被引量:1
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作者 许建国 《计算机研究与发展》 EI CSCD 北大核心 1993年第11期27-32,26,共7页
设计流管理是CAD Framework(框架结构)中一个新的研究领域。本文在给出与设计流有关的基本概念的基础上,采用结构约束和数据约束的方法实现对设计流的知识表示,并通过设计经验的获取途径、进一步的知识生成以及设计流的执行、一致性的... 设计流管理是CAD Framework(框架结构)中一个新的研究领域。本文在给出与设计流有关的基本概念的基础上,采用结构约束和数据约束的方法实现对设计流的知识表示,并通过设计经验的获取途径、进一步的知识生成以及设计流的执行、一致性的处理和设计流的评估,详细讨论CAD Framework 中基于知识的设计流管理。文中还给出了相应的设计流管理系统的总体设计。 展开更多
关键词 CAD FRAMEWORK 设计流管理
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PDM中设计审批流动态权限认证过程研究
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作者 海争平 杨志红 程友斌 《新技术新工艺》 北大核心 2004年第4期2-4,共3页
论述了NM-PDM(某公司PDM)在进行工程图设计审批流管理中所必须解决的权限认证过程。它主要研究图纸设计过程中变换操作者角色时如何实时取得对图纸的控制权限,并对工程图纸进行操作的一种过程设计,是NM-PDM下进行工程图设计时必不可少... 论述了NM-PDM(某公司PDM)在进行工程图设计审批流管理中所必须解决的权限认证过程。它主要研究图纸设计过程中变换操作者角色时如何实时取得对图纸的控制权限,并对工程图纸进行操作的一种过程设计,是NM-PDM下进行工程图设计时必不可少的一项控制手段。 展开更多
关键词 PDM 工程图 设计审批管理 权限认证 产品数据管理
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Smart City Architecture: A Technology Guide for Implementation and Design Challenges 被引量:9
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作者 RONG Wenge XIONG Zhang +2 位作者 COOPER Dave LI Chao SHENG Hao 《China Communications》 SCIE CSCD 2014年第3期56-69,共14页
Urban development is becoming increasingly reliant on effective use of intelligent services.In the process of providing better services to all citizens and improving the efficiency of administration processes,the conc... Urban development is becoming increasingly reliant on effective use of intelligent services.In the process of providing better services to all citizens and improving the efficiency of administration processes,the concept of a smart city has been lauded as a promising solution for the coming challenge of global urbanization.However,due to the broad scope of smart cities their definition has not been standardized,thus proposed architectures are diverse.This work proposes a new architecture from the perspective of the data that underpins all the functionality of smart cities.The proposed architecture is discussed,outlining design challenges and offering insight into the development of smart cities. 展开更多
关键词 smart cities ARCHITECTURE layeredframework technology overview
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A Stream Pattern Matching Method for Traffic Analysis
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作者 Zhu Hui Li Hui Mo Can 《China Communications》 SCIE CSCD 2010年第6期86-93,共8页
In order to identify any traces of suspicious activities for the networks security, Network Traffic Analysis has been the basis of network security and network management. With the continued emergence of new applicati... In order to identify any traces of suspicious activities for the networks security, Network Traffic Analysis has been the basis of network security and network management. With the continued emergence of new applications and encrypted traffic, the currently available approaches can not perform well for all kinds of network data. In this paper, we propose a novel stream pattern matching technique which is not only easily deployed but also includes the advantages of different methods. The main idea is: first, defining a formal description specification, by which any series of data stream can be unambiguously descrbed by a special stream pattern; then a tree representation is constructed by parsing the stream pattern; at last, a stream pattern engine is constructed with the Non-t-mite automata (S-CG-NFA) and Bit-parallel searching algorithms. Our stream pattern analysis system has been fully prototyped on C programming language and Xilinx Vn-tex2 FPGA. The experimental results show the method could provides a high level of recognition efficiency and accuracy. 展开更多
关键词 traffic analysis stream pattern match non-finite automata bit-parallel
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A prototype of workflow management system for construction design projects
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作者 杨明宇 《Journal of Chongqing University》 CAS 2005年第3期144-148,共5页
A great deal of benefits can be achieved if information and process are integrated within the building design project. This paper aims to establish a prototype of workflow management system for construction design pro... A great deal of benefits can be achieved if information and process are integrated within the building design project. This paper aims to establish a prototype of workflow management system for construction design project through the application of workflow technology. The composition and function of prototype is presented to satisfy the needs of information share and process integration. By integrating all subsystems and modules of the prototype, the whole system can deal with design information-flow modeling, emulating and optimizing, task planning and distributing, automatic tracking and monitoring, as well as network service, etc. In this way, the collaborative design environment of building design proiect is brought into being. 展开更多
关键词 workflow management system collaborative desian Intearation modelina simulatina and optimizina
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A novel design of power management integrated circuit with 90 plus efficiency used in AC/DC converter
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作者 Jiang Yanfeng 《Engineering Sciences》 EI 2010年第1期53-58,共6页
Recently, resonant AC/DC converter has been accepted by the industry. However, the efficiency will be decreased at light load. So, a novel topology with critical controlling mode combined with resonant ones is propose... Recently, resonant AC/DC converter has been accepted by the industry. However, the efficiency will be decreased at light load. So, a novel topology with critical controlling mode combined with resonant ones is proposed in this paper. The new topology can correspond to a 90 plus percent of power converting. So,a novel topology of an state of art integrated circuit, which can be used as power management circuit, has been designed based on the above new topology. A simulator which is specifically suitable for the power controller has been founded in this work and it has been used for the simulation of the novel architecture and the proposed integrated circuit. 展开更多
关键词 power management integrated circuit CONVERTER RESONANCE
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Design and Research on Tourism E-commerce Platform
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作者 Dongxia Wang 《International Journal of Technology Management》 2013年第1期97-99,共3页
this paper analyzes application status of tourism e-commerce in China and the Existing problems, points out that the construction of tourism e-commerce platform is an important part of the development of tourism elect... this paper analyzes application status of tourism e-commerce in China and the Existing problems, points out that the construction of tourism e-commerce platform is an important part of the development of tourism electronic commerce. The implementation of all business systems of various tourism enterprise data integration and information integration, the travel industry, all kinds of information resources for collaborative centralized management. By connecting the information management system of scattered all corporate travel value chain, realize the unified operation in the tourism e-commerce platform, improve the exchange of information and online transaction speed. According to our country' s tourism status and characteristics, from the feasibility analysis, function analysis, performance analysis and service oriented thought, this paper analyzes the system architecture of and data flow diagrams, system flow chart, PAD chart analysis of the system' s business processes. And it was analyzed and discussed briefly from the aspects of adaptability, functions, implementation strategy. 展开更多
关键词 SOA Web service tourism e-commerce service object model
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