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时间:2018-07-28
《外文翻译消防系统运行可靠性的估计本科毕业论文.doc》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、外文文献: EstimatesoftheOperationalReliabilityofFireProtectionSystemsForthepastthreeyears,theNationalInstituteofStandardsandTechnology(NIST)hasbeenworkingtodevelopanewencryptionstandardtokeepgovernmentinformationsecure.Theorganizationisinthefinalstagesofanopenprocessofs
2、electingoneormorealgorithms,ordata-scramblingformulas,forthenewAdvancedEncryptionStandard(AES)andplanstomakeadecisionbylatesummerorearlyfall.Thestandardisslatedtogointoeffectnextyear.INTRODUCTIONBackgroundFireprotectionstrategiesaredesignedandinstalledtoperformspeci
3、ficfunctions.Forexample,afiresprinklersystemisexpectedtocontrolorextinguishfires:Toaccomplishthis,thesystemsprinklersmustopen,andtherequiredamountofwatertoachievecontrolorextinguishmentmustbedeliveredtothefirelocation.Afiredetectionsystemisintendedtoprovidesufficien
4、tearlywarningofafiretopermitoccupantnotificationandescape,andinsomecasesactivationofotherfireprotectionfeatures(e.g.,specialextinguishingsystems,smokemanagementsystems).Bothsystemactivation(detection)andnotification(alarm)mustoccurtoachieveearlywarning.Constructionc
5、ompartmentationisgenerallydesignedtolimittheextentoffirespreadaswellastomaintainthebuilding’sstructuralintegrityaswellastenabilityalongescaperoutesforsomespecifiedperiodoftime.Inordertoaccomplishthis,theconstructionfeaturesmustbefire“rated”(basedonstandardtests)andt
6、heintegrityofthefeaturesmaintained.Thereliabilityofindividualfireprotectionstrategiessuchasdetection,automaticsuppression,andconstructioncompartmentationisimportantinputtodetailedengineeringanalysesassociatedwithperformancebaseddesign.Inthecontextofsafetysystems,the
7、reareseveralelementsofreliability,includingbothoperationalandperfornzancereliability.Operationalreliabilityprovidesameasureoftheprobabilitythatafireprotectionsystemwilloperateasintendedwhenneeded.Performancereliabilityisameasureoftheadequacyofthefeaturetosuccessfull
8、yperformitsintendedhnction-11-underspecificfireexposureconditions.Theformerisameasureofcomponentorsystemoperabilitywhilethelatterisameasur
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