• 제목/요약/키워드: expert systems

검색결과 1,167건 처리시간 0.04초

분산 전문가 시스템의 기능을 갖는 이산사건 시뮬레이션: 제조 공정 오류 감지와 진단에의 적용 (Discrete Event Simulation with Embedded Distributed Expert System: Application to Manufacturing Process Monitoring and Diagnosis)

  • 조대호
    • 한국시뮬레이션학회논문지
    • /
    • 제7권2호
    • /
    • pp.137-152
    • /
    • 1998
  • One of the components that constitute the simulation models is the state variables whose values are determined by the time related simulation process. Embedding rule-based expert systems into the simulation models should provide a systematic way of handling these time-dependent variables without distracting the essential problem solving capabilities of the expert systems which are well suited for expressing the decision making function of complex cases. The expert system, however, is inefficient in dealing with the time elapsing characteristics of target system compare to the simulation models. To solve the problem, this paper provides an interruptible inference engine whose inferencing process can be interrupted when the variables' value, which are used as the parameters of the rules, are not yet determined due to the time dependent nature of the state variables. The process is resumed when the variables are ready. The elapse of time is calculated by time-advance function of the simulation model to which the expert system has been embedded. The example modeling shown exploits the embedded interruptible inferencing capability for the controlling and monitoring of metal grating process.

  • PDF

전문가 시스템소프트웨어 유지 보수에 있어서 프레임워크에 관한 연구 (The study on frame work of developing and modification with expert system program software)

  • Chang-Duck Jung
    • 한국컴퓨터산업학회논문지
    • /
    • 제5권4호
    • /
    • pp.503-510
    • /
    • 2004
  • 이 논문은 모듈 프로그램 안에서 전문가 시스템 소프트웨어 유지 보수에 관한 기존 논문을 분석하고 건설 라인 공정의 문제점을 표준 시스템을 적용, 전문가 시스템으로 해결하는 과정에서 전문가 시스템 소프트웨어 프로그램의 재생성 모듈을 기술하였다. 끝으로 CES(Construction Expert System)라는 프로그램 타입 시스템을 적용 검증했고 전문가 시스템 소프트웨어 프로그램을 통해 대형 건설 과정의 유지 보수에 대한 프레임을 제시하였다.

  • PDF

THE RESEARCH ON CONCEPTUAL MODEL OF LNG PLANT PROJECT PLANNING EXPERT SYSTEM

  • Moon-Sun Park;Young-Ai Kim;Seung-Wook Lee;Sung-Ryul Bae;Hyun-Wook Kang;Byoung-Jun Min;Yong-Su Kim
    • 국제학술발표논문집
    • /
    • The 3th International Conference on Construction Engineering and Project Management
    • /
    • pp.1570-1575
    • /
    • 2009
  • The purpose of this research is to propose the conceptual model of Scenario-based Project Planning Expert System which has not been used in domestic LNG plant industry. This research examines data on the plant project planning expert system of domestic and oversea, analyzes the components of project planning expert systems and benchmark excellent cases. The conceptual model of LNG plant project planning expert system is established through the procedure as has been noted above. The results of this research are as follows: First, this research draws out such components of LNG plant project planning expert system as feasibility, cost control, contract management and risk management. Second, this research proposes the conceptual model of LNG plant project planning expert system which core module is consist of feasibility evaluation, life cycle cost evaluation and decision making. Finally, each module of LNG plant project planning expert system would be integrated into the Scenario-based Project Planning Expert System.

  • PDF

배전계토에서의 안전도 평가를 위한 전문가 시스 (An Expert System for Security Assessment in Distribution System)

  • Park, Byoung-youn;Kim, Se-Ho;Moon, Young-Hyun
    • 대한전기학회논문지
    • /
    • 제43권2호
    • /
    • pp.179-188
    • /
    • 1994
  • This paper deals with implementation of an expert system to obtain an optimal plan of load transfer for fault restoration with the capability of security monitoring and assessment in distribution systems. Based on the technique of load transfer tree analysis, the proposed expert system can afford to assist system operators in proposing an optimal plan of load transfer for fault restoration, In paticular, an application of the proposed ES to practical distribution systems yields an optimal load transfer plan which ensures system security by considering security assessment for contingency of feeders and main transformers in the knowledge based sense.

화학공정 결함진단을 위한 전문가 시스템 적용에 관한 고찰 (Review of expert system applications to chemical process fault diagnosis)

  • 오전근;윤인섭
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 1987년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 16-17 Oct. 1987
    • /
    • pp.674-679
    • /
    • 1987
  • Process failures can occur at any time during operation, so a continuous effort of fault detection, diagsis, and correction is required. Expert system paridigm has been regarded as a promising approach to real time process supervisory control especially to fault diagnosis. The most important aspects of fault diagnostic expert systems(FDES) are the problem-solving inference strategy and knowledge organizations. The necessity of FDES, the nature of diagnostic knowledge, the representation of knowledge, and the inference mechanism of FDES, et al. are described, which are announced by previous researchers. And the existing FDES are categorized and critically reviewed in this work.

  • PDF

신뢰성 이론을 이용한 자동창고 설비 선정 전문가 시스템 개발에 관한 연구 (Development of the Expert System for Selection of Equipment for Automated Warehouses Using Reliability Theory)

  • 이영해;정창식
    • Asia pacific journal of information systems
    • /
    • 제8권3호
    • /
    • pp.135-145
    • /
    • 1998
  • There exists popular approach using certainty factor (CF) for the development of effective reasoning mechanism under uncertainty in Expert System, However, there is a problem with CF. The CF values could be resulted in the opposite of given conditional probabilities. In this paper, a method for, reasoning under uncertainty using reliability theory to overcome the problem is proposed. And the proposed method is used in the development of Expert System for the selection of equipment for automated warehouses.

  • PDF

데이터처리전문기관의 역할 및 보안 강화방안 연구: 버몬트주 데이터브로커 비교를 중심으로 (A Study on the Role and Security Enhancement of the Expert Data Processing Agency: Focusing on a Comparison of Data Brokers in Vermont)

  • 김수한;권헌영
    • 한국IT서비스학회지
    • /
    • 제22권3호
    • /
    • pp.29-47
    • /
    • 2023
  • With the recent advancement of information and communication technologies such as artificial intelligence, big data, cloud computing, and 5G, data is being produced and digitized in unprecedented amounts. As a result, data has emerged as a critical resource for the future economy, and overseas countries have been revising laws for data protection and utilization. In Korea, the 'Data 3 Act' was revised in 2020 to introduce institutional measures that classify personal information, pseudonymized information, and anonymous information for research, statistics, and preservation of public records. Among them, it is expected to increase the added value of data by combining pseudonymized personal information, and to this end, "the Expert Data Combination Agency" and "the Expert Data Agency" (hereinafter referred to as the Expert Data Processing Agency) system were introduced. In comparison to these domestic systems, we would like to analyze similar overseas systems, and it was recently confirmed that the Vermont government in the United States enacted the first "Data Broker Act" in the United States as a measure to protect personal information held by data brokers. In this study, we aim to compare and analyze the roles and functions of the "Expert Data Processing Agency" and "Data Broker," and to identify differences in designated standards, security measures, etc., in order to present ways to contribute to the activation of the data economy and enhance information protection.

전문가 기법을 이용한 자동 동조 PID 제어기 (Auto-tuning PID controller using the expert method)

  • 이창구;김성중;황형수
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
    • /
    • pp.413-417
    • /
    • 1989
  • The idea of expert control is to incorporate a rule based expert system in a feedback control system. In this paper, the expert system concepts are instead used as an element of the feedback loop in a single controller. The algorithms are coded in as pure form as possible and the heuristic logic is implemented as rules. This paper reports on effort to produce an implementation of an expert controller on microcomputer based system, including an industrial programmable controller.

  • PDF

전기로 제어를 위한 전문가 시스템 (Expert system for electrical furnace)

  • 명노직;허욱열
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 1990년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 26-27 Oct. 1990
    • /
    • pp.113-116
    • /
    • 1990
  • In this paper, An expert system for electric furnace with time delay is proposed. The expert system uses Fuzzy control theory. The conventional controller uses Auto-Tuning control theory. From experiment, we can obtain that the response of expert system is superior to the response of the conventional controller. In this experiment, the expert controller is implemented with the IBM PC. The 8751 One chip processor controling the electric furnace is used.

  • PDF

그림에 의한 심리진단 전문가 시스템의 지식 체제 (A Framework of an Expert System's Knowledge for the Diagnosis in Art Psychotherapy)

  • 김성인;류석;명노해;김승권
    • 지능정보연구
    • /
    • 제11권1호
    • /
    • pp.65-93
    • /
    • 2005
  • 미술진단을 위한 전문가 시스템에는 (1)그림의 특징 (2) 환자의 심리증상 (3)그림 특징과 환자 심리증상 간의 관계 (4) 전문가의 진단과정 (5)지식의 표출 및 표현 방법 둥 다양한 분야에서 광범위한 지식이 필요하다. 이 지식들은 현장의 그림진단 치료사와 함께, 심리학자, 심리치료사, 그리고 미술진단을 컴퓨터에 구현할 지식공학자들로부터 얻어진다. 전문가는 다양한 요인들을 복합적으로 고려하는 매우 복잡한 진단과정을 거치며, 관련되는 방대한 지식들은 성격상 모호하고, 일관성이 부족하며, 때에 따라서는 상충적이기도 하다. 이 논문에서는 전문가의 진단과정을 모델링하여, 전문가 시스템의 구조를 설립하고, 지식들을 분석하여 분류한다. 분류에 따라 지식 획득과 표현에 적합한 방법을 선정하며, 온톨로지(ontoloty) 개념에 의한 프로티지(Protege) 2000을 도구로 사용하여 이 지식들을 체계적으로 정리한다. 실제 예제를 통하여 이 시스템의 사용가능성과 적합성을 보인다.

  • PDF