Journal of Japan Society for Safety Engineering
Online ISSN : 2424-0656
Print ISSN : 0570-4480
ISSN-L : 0570-4480
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Volume 36, Issue 4
JOURNAL OF JAPAN SOCIETY FOR SAFETY ENGINEERING_1997_4
Displaying 1-12 of 12 articles from this issue
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PROPOSAL FOR SAFETY
  • Study　on　Fault　Diagnostic　System　using　Modularized　Knowledge
    Yukiyasu Shimada, Kazuhiko Suzuki and Hayatoshi Sayama, Tong Song
    1997 Volume 36 Issue 4 Pages 214-220
    Published: August 15, 1997
    Released on J-STAGE: May 31, 2017
    DOIhttps://doi.org/10.18943/safety.36.4_214
    JOURNAL FREE ACCESS
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    This　paper　presents　a　new　method　applying　knowledge　engineering　technique　to　develop　fault　diagnostic　system．This system　consists　of　the　knowledge　base　and　the　inference　engille．Chemical　plant　consists　many　components　which　are　pump，valve　and　so　on．The　knowledge　of　these　component　malfunctions　can　commonly　be　utilized　for　various　plants．Causal relationships　between　process　variables　and　failure　mode　for　various　components　are　darified　and　described　as　component flow　graph、Process flow　graph，which　each　component　How　graphs　are　lillked，stored　in　the　knowledge　base．This　system diagnoses　any　malfunctions　in　the　plant　by　searching　the　knowledge　base，This　proposed　diagnostic　system　has　the　facility for　correcting　and　changing　knowledge　base． A　pilot　plant　is　used　to　demonstrate　the　eflectiveness　of　the　proposed　method．

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  • Behavior　of　Total　Mercury　in　Urban　Soils
    Masami Hiromoto, Ryozo Nakagawa, Satoshi　 Shibata
    1997 Volume 36 Issue 4 Pages 221-226
    Published: August 15, 1997
    Released on J-STAGE: May 31, 2017
    DOIhttps://doi.org/10.18943/safety.36.4_221
    JOURNAL FREE ACCESS
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    Authors　tried　to　elucidate　the　behavior　of　residual　mercury　in　urban　soils．Soil　samples　were　collected　from　the　sites （41samples）of 38parks　and　a　campus　site（42samples）of　Chiba　University　near　each　station　of　Tobu lsezaki　and　Keisei railroads　in　Saitama，Tokyo　and　Chiba、The　results　show　that　total　mercury　concentrations　in　the　studied　soils　were　ranged from　O.029 to　L27ppm　with　a　mean　O．30ppm　based　on　dry　weight。This　value　was　about 4 times　as　large　as　that（0.083ppm）of　soils　in　uncultivated　land　of　rural　districts．It　was　afraid　that　the　urban　soils　were　strongly　influenced　by　the　anth－ ropogenic　contamination．The　soil　samples　of　residual　mercury　concentrations　over　O.25ppm　of　contaminated　level　were l2％in　park　sites　and 64％ in　campus　site．

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TECHNICAL REPORT
RESEACH INSTITUTE
SALOON
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