1) Signed directed graph
符号定向图
1.
Computer-aided Hazard and Operability Study System Based on Signed Directed Graph;
基于符号定向图计算机辅助危险与可操作性分析系统
2.
The actuality and foreground of SDG (signed directed graph) applied in the field of HAZOP (HAZard and OPerability) and PHA (process hazard analysis) are analyzed.
分析了符号定向图(SignedDirectedGraph,SDG)技术在危险与可操作性分析(HAZardandOPerability,HAZOP)、过程危险性分析(ProcessHazardAnalysis,PHA)等领域中的应用现状和前景,提出了研究基于SDG的HAZOP计算机辅助自动建模方法,构建了基于SDG的HAZOP计算机辅助自动建模软件平台,阐述了研究路线,展示了应用策略。
3.
Recently, the highly advanced computational technology has led to the development of the signed directed graph (SDG) deep knowledge model based qualitative approach.
近年来,随着现代计算机技术的日新月异,使得基于符号定向图(SDG)深层知识模型的定性仿真研究和应用取得了显著进展。
2) SDG
符号定向图
1.
Recently,the marked development of qualitative simulation research based on the signed directed graph (SDG) has led to SDG be the most effective method in fault diagnosis.
近年来,基于符号定向图(SDG)模型的定向仿真研究取得了很大进展,使得SDG成为过程系统故障诊断方面的最有效的方法。
2.
Aiming at the difficulty of quantitatively description of the problem that the information is ambiguous,incomplete,comparatively illegibility in the process of material supply simulation,a sign-directed graph(SDG) method of qualitative simulation is introduced to analyze the material purvey process in qualitative way.
针对物资供应过程仿真中仿真信息不明确、不完整、比较模糊而又难于定量化描述的问题,引入定性仿真中符号定向图(SDG)法,定性分析了通用物资供应的过程。
3.
The deviation of SDG node is fuzzed as qualitative fuzzy deviation,and the new deviations of child nodes are fused into the possibility of fault source of parent node with the analysis of the character of fault information transfer and the adventage of dealing with different malfunction cases.
将符号定向图SDG(Signed Directed Graph)节点偏差模糊化为定性模糊偏差,并从子节点向父节点对其进行数据融合,得到父节点故障源可能性,分析了该模糊融合传递信息的特性和处理各种发生故障的情形的优点。
3) signed directed graph
符号有向图
1.
After analyzing the information transfer characteristics of large-scale complex systems,a new fault description model-fuzzy probability signed directed graph(FPSDG) was proposed by introducing the status association probability,fuzzy information and object-oriented technology in SDG.
通过分析复杂系统的故障信息传递特性,在符号有向图(SDG)中引入了状态关联概率和模糊信息,并结合面向对象技术提出了一种新的故障描述模型——模糊概率有向图。
2.
Signed Directed Graph (SDG) is used for a mathematical model representing the influences among elements of the system, which considers the characteristic of system’s structure and can deal with the complex process of system in a large-scale, and it is a self-contained method to diagnosis system failures.
基于符号有向图(SignedDirectedGraph,SDG)的定性推理方法用有向图将故障传播模型化,并用节点间的符号逻辑关系定位系统的故障源,是一种完备的揭示系统故障的有效方法。
3.
There are two topics about the method being given: fault propagation digraph and signed directed graph( SDG) .
该文给出了基于图论的故障诊断原理,综述了基于图论的故障诊断研究现状,包括两种主要方法:基于故障传播有向图和基于符号有向图的诊断方法。
4) SDG
符号有向图
1.
Algorithms of SDG-based Fault Diagnosis with Unmeasured Nodes for Deaerator;
除氧器故障诊断的含未测节点的符号有向图方法
2.
Application of SDG in Chemical Hazard Assessment
符号有向图在化工安全评价中的应用进展
3.
On the basis of analyzing the theory of signed directed graph(SDG)technology,practical application of SDG qualitative model in computer aided HAZOP and fault diagnosis was discussed.
在分析符号有向图(SDG)技术的理论基础上,探讨了SDG定性模型在计算机辅助HAZOP安全评价和故障诊断中的实际应用,并针对石化领域中常用的加热炉设备,建立SDG模型进行HAZOP和故障诊断分析。
5) signed directed graph(SDG)
符号有向图
1.
The former method derives rules through rough set reduction of a genetic algorithm,while the latter transforms the cause-effect graph to rules by using the automatic reasoning result of a signed directed graph(SDG).
其中基于历史数据的规则提取方法通过基于遗传算法的粗糙集约简来实现;基于模型的规则提取方法利用了符号有向图(SDG)的计算机自动推理结果,将因果图转化为规则。
2.
The process signed directed graph(SDG) model represents the cause and effect linkages to connect the fault origin to the observed symptoms of the fault.
基于符号有向图(signed directed graph,SDG)的化工过程模型可以表征过程故障与故障源之间的因果关系,SDG故障分析方法通过有向图定性推理技术实现故障诊断。
3.
In view of the characteristics of modern chemical process flow,this paper models the process flow of chemical production by utilizing Signed Directed Graph(SDG) model,and obtains causality diagram that describes the mechanism of process flow.
针对现代流程工业的特点,利用符号有向图模型(SDG)对化工生产工艺流程进行建模,运用SDG的推理能力,将其因果图转化为产生式规则,获得对整个生产流程的规则描述。
6) The improved signed directed graph
改进符号有向图
补充资料：定向图
定向图
graph, oriented
定向图[省皿户，仪触叻目;印呻侧，砚爪娜脚山.泊〕，有白甲(山功叻划graPh) 每边都指定了方向的图.一个定向图G可以由一顶点集V和顶点的有序对(称为弧)的集合E表明.弧(u，v)出发于顶点u且终止于顶点v.由顶点v出发的弧数称为v的出度(outPut selni一d叼优)，而终止于顶点。的弧数称为”的水摩(帅ut~一吻-ree).顶点和弧的一个交错序列v0，e，，v，，‘’‘，气，年其中e，二(v‘一，，v，)(i=1，…，n)称为一(定向)序烈(seg坦nCe).序列是闭合的，如果它的第一顶点和最后顶点重合.一条路(path)是一个序列，其中所有顶点都相异.一个围道(contour)是一个非平凡闭序列(至少包含一弧)，其所有顶点，除首尾两顶点外，都是相异的.如果从顶点u至顶点v的路存在，则可以说v是由u可到达的(代习chab】e). 一个有已标号的顶点v，，…，v。和弧e，，一，气的定向图，可以用一个羊联年阵(加ci山沮沈~)，即用一个m xn矩阵ilbij}{表明，其中 了+l，如果e是由v出发的; 阮、=资一1，如果e是终止于”‘的; 贬o，如果ej与v，不关联. 定向图G的顶点的邻烤禅呼(adj困戈n卿n皿廿认)A(G)是nxn矩阵Ila‘，IJ，其中元a，z等于从v，到vj的弧数.A(G)的行和等于定向图的顶点的出度，而·列和等于人度.矩阵Ak(G)(即G的相邻矩阵的k次幂)的(i，j)位的元等于由v，至vj的长为k的通道数. 在定向图中可以定义几种形式的连通性(见图的连通度(脚Ph，conn。沈ivity ofa)).一个定向图称为强连谬的(stron蜘co川℃Cted或strong)，如果它的任意两个顶点中的一个可以到达另一个.定向图称为单侧连通的(明ilate司yco~t记)，如果它的任意两个顶点中至少有一个可以从另一个到达;定向图称为弱连通的(姗犯y com长以ed或袱习k)，如果它的任意两个顶点可由图中的一条链连接，这条链由原定向图中把每段弧换为边(不定向)得到. 定向图可用于:概率论中表示MaP劝.链(Mar-kov ehain);对策论中描述对策情况集和竞争的结果;数理经济学中解运输问题;自动机理论中构造传递图解等.在图论本身，可以引人一种定向以解决关于不定向图的某些问题，从而把原题化为一个定向图的问题.定向图与不定向图的基本区别表现在一些概念的定义上，如路、连通性、可到达性、距离等.最令人感兴趣的定向图类型是竞赛图(tou们比田tr祀nt)、可迁图、偏序的图、生长树、单值映射图和无围道图.【补注】图论的术语亦见图(giaPh)·围道常称为亨回甲(dim叻刃卿de)·关于定向图的综述见【AI]·
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条