There are such kinds of mathematics idea and method as sign and graph, function, inversion; discussion and so on in the mathematics teaching in the middle school.
用数学思想方法指导学生的学习,数学会变得更容易理解和掌握,中学数学中常见的思想方法有符号和图形思想、函数思想、转化与化归思想、分类讨论思想等等。
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。
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。
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。
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。
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。
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。
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
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
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。
Research on Fault Diagnosis Approach Based on Signed Directed Graph for Thermal System;
基于符号有向图的热力系统故障诊断方法研究
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
Fault Diagnosis System Based on Sign Directed Graph and Software Platform
基于符号有向图的故障诊断系统及其软件平台
A fault diagnosis method based on nonlinear principal component analysis and sign directed graph
基于非线性主元分析和符号有向图的故障诊断方法
Computer-aided hazard and operability study technique and its application based on SDG
基于符号有向图的计算机辅助危险与可操作性分析技术及其应用
Model and algorithm of optimal embedded sensors placement for gearboxes based on signed directed graph of vibration propagation
基于振动传递符号有向图的齿轮箱嵌入式传感器优化配置模型与算法
Drag to add a city symbol to your mind map.
拖动此形状,向构思图上添加城市符号。
To avoid detail we shall use the latter symbol for both undirected and directed graphs and rely on the context for clarity.
为了避免琐碎,对无向图和有向图我们都采用后一符号,而靠上下文加以澄清。
graph notation for AND/OR graphs
“与”、“或”图形符号
Artistic Semiotics and Cultural Semiotics:Towards a Systematic Approach;
走向体系研究的艺术符号学与文化符号学——塔尔图—莫斯科符号学理论探索
string-oriented symbol language
面向字符串的符号语言
concrete poetry
ph.1. 图案式有形诗体;有形诗(用形象字母、单字以及符号表达意向的诗体)
Study on Pictogram Applied in the Design of Graphic Advertisement
导向图形符号在平面广告设计中的应用研究
Graphical symbols for use on equipment--Common symbols
GB/T16273.1-1996设备用图形符号通用符号
Graphical symbols for use on equipment--Common symbols for machine tools
GB/T16273.2-1996设备用图形符号机床通用符号
The Research and Implementation of Map Symbols' Symbolization in GIS
GIS中地图符号的符号化研究与实现
Export &all symbols
导出所有符号(&A)
General requirements of graphical symbols concerning consumer interest
GB7291-1987与消费者有关图形符号的一般规要求
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