• Title/Summary/Keyword: Process fault

검색결과 936건 처리시간 0.031초

영역성장과정에서 다중 조건으로 병합하는 워터쉐드 영상분할 (Watershed Segmentation with Multiple Merging Conditions in Region Growing Process)

  • 장종원;윤영우
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2002년도 하계종합학술대회 논문집(3)
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    • pp.59-62
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    • 2002
  • Watershed Segmentation with Multiple Merging Conditions in Region Growing Process The watershed segmentation method holds the merits of edge-based and region-based methods together, but still shows some problems such as over segmentation and merging fault. We propose an algorithm which overcomes the problems of the watershed method and shows efficient performance for .general images, not for specific ones. The algorithm segments or merges regions by thresholding the depths of the catchment basins, the similarities and the sizes of the regions. The experimental results shows the reduction of the number of the segmented regions that are suitable to human visual system and consciousness.

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정량적 위험성 평가에 의한 안전관리 투자의 비용-편익분석 (Cost-Benefit Analysis for Safety Management Cost using Quantitative Risk Analysis)

  • 장서일;조지훈;김태옥
    • 대한안전경영과학회지
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    • 제4권4호
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    • pp.15-26
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    • 2002
  • The quantitative evaluation method of the safety management cost was suggested to prevent a gas accident as a major industrial accident. In a gas governor station, process risk assessments such as the fault tree analysis(FTA) and the consequence analysis were performed. Based on process risk assessments, potential accident costs were estimated and the cost-benefit analysis(CBA) was performed. From the cost-benefit analysis for five classification items of safety management cost, the order of the cost/benefit ratio was estimated.

Area Usage Factor Analyzing Method for Semi-conductor Manufacturing Process

  • Konishi, Katunobu;Ukida, Hiroyuki;Sawada, Koutarou
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1998년도 제13차 학술회의논문집
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    • pp.480-483
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    • 1998
  • For memory products, it is very important to develop a new production line as soon as possible. All products are inspected to get rid of defected products at the last testing stage. Those inspection data are called FCM. In this paper, based on the FCM data, Area Usage Factor (AUF) analyzing method will be proposed. Process engineers can make up their mind to which direction they should concentrate their analyzing power.

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공정고장 검출식별시스템을 위한 잔차발생기구 (A new residual generator for a Process FDIS)

  • 이기상;박태건;이상운
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2003년도 하계학술대회 논문집 D
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    • pp.2014-2016
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    • 2003
  • A new residual generation scheme that can be employed in the process fault detection and isolation systems for linear (control) systems is suggested. The scheme is very simple, but provides the same information for the detection and isolation of the anticipated faults as the conventional multiple observer based schemes. Application results show the practical feasibility of the proposed scheme.

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크실렌 산화공정 냉각장치의 고장진단 전문가시스템의 구축 (An Establishment of Expert System for Fault Diagnoses of the Cooling System In the Xylene Oxidation Reaction Process)

  • 심종칠;김창은;주용준
    • 한국안전학회지
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    • 제11권4호
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    • pp.54-63
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    • 1996
  • We establish an expert system for the xylene oxidation reaction process of chemical plants using HAZOP(Hazard and Operability Studies). Our research focus Is only reduced to the cooling system of the total chemical plant due to lack of information. This expert system shows the priority of reasons for the system failure using confidence factor.

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