A Method for Diagnosing SCADA Failures Based on Predicate Logic Within the Expert System

2021 ◽  
pp. 340-358
Author(s):  
Olena Syrotkina ◽  
Mykhailo Aleksieiev ◽  
Borys Moroz ◽  
Iryna Udovyk ◽  
Andrii Martynenko
Keyword(s):  
Expert System ◽  
Predicate Logic

Expressway Event Management Expert System Based on Ontology and Rule Reasoning

2012 ◽  
Vol 601 ◽  
pp. 361-368
Author(s):  
Zong Xiao Yang ◽  
Tian Xiao ◽  
Lei Song ◽  
Guan Qiang Dong
Keyword(s):  
Decision Support ◽  
Expert System ◽  
Knowledge Representation ◽  
High Efficiency ◽  
Predicate Logic ◽  
Complex Problem ◽  
Practical Significance ◽  
Incident Management ◽  
Emergency Rescue ◽  
Management Expert

Response and decision-making support in expressway emergency management and rescue greatly affects some key factors like emergency rescue plan, emergency duration time, effect range, economy and time loss. Experts system is a kind of intelligent program, using knowledge and reasoning to solve the complex problem that only experts can work out, it is a popular and efficient decision-support means, has some practical features that manual way cannot compare with and offers a modem scientific measure in incident management. Expert system can provide high-efficiency, rapid, exact and powerful assistance in decision support. In order to deal with various possible emergencies promptly and efficiently and therefore ensure the safety and unblocked state of the expressway, develop the expert system has become a trend of emergency rescue and management. In expert system,The knowledge representation is the key basic issues has the important influence to construction of the knowledge base and the reasoning of the expert system. So there has the practical significance to further research on knowledge representation of expressway accident management system, According to features of different knowledge, in exsiting expert systems different knowledge representation methods were adopted such as frame, production rule, procedure, first-order predicate logic, etc. This paper focus on the ontology’s application in the field of expressway emergency rescue and propose a expressway event managemnet expert system based on ontology and rule reasoning.

AN ARTIFICIAL INTELLIGENCE APPROACH TO ANALOG CIRCUIT DESIGN

1991 ◽  
Vol 01 (02) ◽  
pp. 149-176 ◽  
Author(s):  
KRZYSZTOF WAWRYN
Keyword(s):  
Expert System ◽  
Circuit Design ◽  
Analog Circuits ◽  
Analog Circuit ◽  
Predicate Logic ◽  
Design System ◽  
Analog Circuit Design ◽  
New Approach ◽  
Circuit Representation ◽  
Different Levels

This article deals with a new approach to an intelligent analog circuit design. The iterative closed loop design methodology adopts an expert system approach to provide topological synthesis, the SPICE circuit simulator to evaluate the circuit performance and a new approach of the diagnostic expert system to provide advice on how to improve the design. Unlike previous design methods, this approach introduces formal circuit representation for both numerical and heuristic knowledge of the design system. The predicate logic circuit representation is proposed to introduce a new concept of a formal analog circuit description language. The language syntax and semantics provide precise symbolic description of analog circuits functionality at different levels of hierarchy and connectivities together with transistor sizes of CMOS circuits at the transistor level. Different levels of hierarchy with circuit structures and performance parameters are presented in detail. It is shown how sentence conversion rules of language grammar can be used to derive transistor level circuits from input performance specifications through all intermediate levels of hierarchy. The implementation of the methodology and associated experimental results for CMOS operational amplifier designs are presented.

scholarly journals Application of Methods of Information Engineering for Change of Structure of Multilayer Systems of Organizational Management

2021 ◽  
Vol 21 (2) ◽  
pp. 136-144
Author(s):  
V.E. Belousov ◽  
◽  
D.V. Dorofeev ◽  
E.N. Zenkova
Keyword(s):  
Expert System ◽  
Programming Languages ◽  
Hierarchical Structure ◽  
Predicate Logic ◽  
Organizational Management ◽  
Information Support ◽  
Multilayer Systems ◽  
Information Engineering ◽  
Complex Development ◽  
Definition Of

In this work the task is formulated and the method of reconfiguration of systems of organizational management on the basis of synthesis of the functional structure having an impact on an appearance of all system considerably defining an order of its functioning, integrating in a whole of means of technical and mathematical, program and information support is offered. The research objective consists in need of increase in effective management of organizational systems on the basis of complex development, implementation and application of funds of automated management of its elements. Expert systems on the basis of declarative programming languages are applied to synthesis of similar structures. Research methods. As the tool for definition of the knowledge base about the field of restructuring of structure of management calculation of expressions and language of a predicate logic, that is a logic theory of first order is used. Then, the problem of reconfiguration of hierarchical structure of management system can be presented doubly. First, as a problem of definition of the changes of the known rational hierarchical structure providing minimum loss from the arisen functional failures. Secondly, as a problem of creation of new rational structure which provides optimum use of the resources used in the course of achievement of definite purposes in the changing conditions. Results. As a result of a research, on the basis of de Morgan's law the factors influencing a system status of organizational management in general are defined. The necessary structure of solvable tasks of all hierarchical structure is defined by extent of influence of different factors on characteristics of structure of management. Conclusion. Work of the received expert system consists in consecutive execution or failure to follow rules and transition from one status to another. In case of an impasse the expert system gives the report in the form of requirements of alternative change of these or those rules (factors). New rules are remembered. Thus, the system of knowledge is increased.

An expert system for FMS control

1993 ◽  
Vol 2 (4) ◽  
pp. 223 ◽  
Author(s):  
Wang Chengen ◽  
Zhu Jianying ◽  
Wei Zhongxin
Keyword(s):  
Expert System

HAZARD: An Expert System for Risk Assessment of Environmental Chemicals

1987 ◽  
Vol 26 (01) ◽  
pp. 13-23 ◽  
Author(s):  
H. W. Gottinger
Keyword(s):  
Expert System ◽  
Structural Information ◽  
Chemical Carcinogenesis ◽  
Structural Features ◽  
Environmental Chemicals ◽  
Chemical Carcinogens ◽  
Carcinogenic Activity ◽  
Current State ◽  
Structure Activity ◽  
Carcinogenic Potential

AbstractThe purpose of this paper is to report on an expert system in design that screens for potential hazards from environmental chemicals on the basis of structure-activity relationships in the study of chemical carcinogenesis, particularly with respect to analyzing the current state of known structural information about chemical carcinogens and predicting the possible carcinogenicity of untested chemicals. The structure-activity tree serves as an index of known chemical structure features associated with carcinogenic activity. The basic units of the tree are the principal recognized classes of chemical carcinogens that are subdivided into subclasses known as nodes according to specific structural features that may reflect differences in carcinogenic potential among chemicals in the class. An analysis of a computerized data base of known carcinogens (knowledge base) is proposed using the structure-activity tree in order to test the validity of the tree as a classification scheme (inference engine).

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