A method is presented for process fault diagnosis using information from fault tree analysis and uncertainty/imprecision of data. Fault tree analysis, which has been used as a method of system reliability/safety analysis, provides a procedure for identifying failures within a process. A fuzzy fault diagnostic system is constructed which uses the fuzzy fault tree analysis to represent a knowledge of the causal relationships in process operation and control system. The proposed method is applied successfully to a nitric acid cooler process plant
en-copyright= kn-copyright= en-aut-name=YangZong Xiao en-aut-sei=Yang en-aut-mei=Zong Xiao kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=SuzukiKazuhiko en-aut-sei=Suzuki en-aut-mei=Kazuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=ShimadaYukiyasu en-aut-sei=Shimada en-aut-mei=Yukiyasu kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=SayamaHayatoshi en-aut-sei=Sayama en-aut-mei=Hayatoshi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University en-keyword=Fuzzy expert system kn-keyword=Fuzzy expert system en-keyword=Fault tree analysis kn-keyword=Fault tree analysis en-keyword=Fuzzy sets kn-keyword=Fuzzy sets en-keyword=Fault diagnosis kn-keyword=Fault diagnosis END start-ver=1.4 cd-journal=joma no-vol=45 cd-vols= no-issue=5 article-no= start-page=363 end-page=369 dt-received= dt-revised= dt-accepted= dt-pub-year=1991 dt-pub=199110 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Effect of a protease inhibitor on the stability of catalase in liver and blood from acatalasemic and normal mice. en-subtitle= kn-subtitle= en-abstract= kn-abstract=Effects of Gabexate mesilate (GM) (([ethyl-4-(6-guanidino hexanoyloxy) benzoate] methane sulfonate)), a protease inhibitor, on the activities of catalase in liver, erythrocytes and reticulocytes from acatalasemic mice were examined. Preincubation without GM at 37 degrees C for 160 min lowered the catalase activities of liver, erythrocytes and reticulocytes from acatalasemic mice, to 24%, 40% and 10% of the initial levels, respectively. But, preincubation with GM at 37 degrees C for 160 min delayed the rapid decrease in activities of residual catalases in the liver, erythrocytes and reticulocytes of acatalasemic mice to 65%, 93% and 85% of the initial values, respectively. At 20 degrees C or below, no reduction in catalase activity of reticulocytes from acatalasemic mice occurred with or even without GM. At pH 5.0, the decrease in catalase activity of acatalasemic mice was small both in the presence and the absence of GM. In the alkaline range, the reduction in the enzyme activity of the mutant mice without GM was enhanced with increase in pH values up to 8.5. But the presence of GM during preincubation at pH 7.5, retained the catalase activity of acatalasemic mice, to 64% of the activity at pH 6.5. These data suggest that some factors affected by GM, might be responsible for the low stability and activity of catalase in the acatalasemic mice.
en-copyright= kn-copyright= en-aut-name=SuzukiKazuhiko en-aut-sei=Suzuki en-aut-mei=Kazuhiko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=OgataMasana en-aut-sei=Ogata en-aut-mei=Masana kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University en-keyword=acatalasemic mouse kn-keyword=acatalasemic mouse en-keyword=residual catalase kn-keyword=residual catalase en-keyword=Gabexate mesilate kn-keyword=Gabexate mesilate en-keyword=protease inhibitor kn-keyword=protease inhibitor END start-ver=1.4 cd-journal=joma no-vol=25 cd-vols= no-issue=2 article-no= start-page=55 end-page=67 dt-received= dt-revised= dt-accepted= dt-pub-year=1991 dt-pub=19910328 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=A Procedure for Settling Multi-Criteria Problem by a Small Group of Decision Makers en-subtitle= kn-subtitle= en-abstract= kn-abstract=AHP can handle decision-making problems involving several criteria when some of these are difficult or impossible to compare other than numerically. When a small group of decision makers settle the multi-criteria problem by AHP, the members of group could not often reach an agreement with hierarchic structure involving objectives, criteria, sub-criteria and alternatives because they have different positions, interests, and opinions. Further, the members have different importances for criteria and sub-criteria, and have dissimilar preferences for alternatives. In this article, we reveal the troubleness of AHP in case of being used by a small group of decision makers. Moreover, we proposed a procedure of AHP which the members of group could easily agree with the structure of problem and the weights of criteria etc. en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=OhkuraAkira kn-aut-sei=Ohkura kn-aut-mei=Akira aut-affil-num=1 ORCID= en-aut-name=KameyamaYoshimasa en-aut-sei=Kameyama en-aut-mei=Yoshimasa kn-aut-name=亀山嘉正 kn-aut-sei=亀山 kn-aut-mei=嘉正 aut-affil-num=2 ORCID= en-aut-name=SayamaHayatoshi en-aut-sei=Sayama en-aut-mei=Hayatoshi kn-aut-name=佐山隼敏 kn-aut-sei=佐山 kn-aut-mei=隼敏 aut-affil-num=3 ORCID= en-aut-name=SuzukiKazuhiko en-aut-sei=Suzuki en-aut-mei=Kazuhiko kn-aut-name=鈴木和彦 kn-aut-sei=鈴木 kn-aut-mei=和彦 aut-affil-num=4 ORCID= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=FukumotoShuichi kn-aut-sei=Fukumoto kn-aut-mei=Shuichi aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering affil-num=3 en-affil= kn-affil=Department of Mechanical Engineering affil-num=4 en-affil= kn-affil=Department of Mechanical Engineering affil-num=5 en-affil= kn-affil=Daio Seishi Corporation END start-ver=1.4 cd-journal=joma no-vol=27 cd-vols= no-issue=1 article-no= start-page=33 end-page=44 dt-received= dt-revised= dt-accepted= dt-pub-year=1992 dt-pub=19921125 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Process Fault Diagnosis using Neural Networks and Fault Tree Analysis Information en-subtitle= kn-subtitle= en-abstract= kn-abstract=Neural nets have recently become the focus of much attention, largely because of their wide range of complex and nonlinear problems. This paper presents a new integrated approach using neural networks for diagnosing process failures. The fault propagation in process is modeled by causal relationships from the fault tree and its minimal cut sets. The measurement patterns required for training and testing the neural network were obtained from fault propagation model. The network is able to diagnose even in the presence of malfunction of certain sensors. We demonstrate via a nitric acid cooler process how the neural network can learn and successfully diagnose the faults. en-copyright= kn-copyright= en-aut-name=ShimadaYukiyasu en-aut-sei=Shimada en-aut-mei=Yukiyasu kn-aut-name=島田行恭 kn-aut-sei=島田 kn-aut-mei=行恭 aut-affil-num=1 ORCID= en-aut-name=SuzukiKazuhiko en-aut-sei=Suzuki en-aut-mei=Kazuhiko kn-aut-name=鈴木和彦 kn-aut-sei=鈴木 kn-aut-mei=和彦 aut-affil-num=2 ORCID= en-aut-name=SayamaHayatoshi en-aut-sei=Sayama en-aut-mei=Hayatoshi kn-aut-name=佐山隼敏 kn-aut-sei=佐山 kn-aut-mei=隼敏 aut-affil-num=3 ORCID= affil-num=1 en-affil= kn-affil=Department of Mechanical Engineering affil-num=2 en-affil= kn-affil=Department of Mechanical Engineering affil-num=3 en-affil= kn-affil=Department of Mechanical Engineering END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=1991 dt-pub=19911231 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=アカタラセミアマウスと正常マウスの肝臓及び血液中カタラーゼの安定性に及ぼすたん白質分解酵素阻害剤の影響 kn-title=Effect of a protease inhibitor on the stability of catalase in liver and blood from acatalasemic and normal mice en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=鈴木和彦 kn-aut-sei=鈴木 kn-aut-mei=和彦 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 END