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下載積分: 13 賞幣
上傳時間:2023-07-21
頁數(shù): 0
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簡介:APPLICATIONOFPLCINTHEELEVATORCONTROLSYSTEMOFINTELLIGENCEBUILDINGABSTRACTTHEPAPERMAINLYDISCUSSESONESUBSYSTEMOFINTELLIGENCEBUILDINGSYSTEMTHEELEVATORCONTROLSYSTEMTHEPLCSTRONGABILITYININTERFERENCEANDSOONMAKESTHEELEVATORINDUSTRYONEAFTERANOTHERTOAPPLYTHEPLCTOTHEELEVATORCONTROLSYSTEMINORDERTOREPLACETHERELAYBEINGUSEDINTRADITIONALELEVATORCONTROLSYSTEMTHEAPPLICATIONOFPLCINTHEELEVATORCONTROLSYSTEMREDUCESTHEBREAKDOWNRATEANDEFFICIENTLYIMPROVESTHEOPERATINGRELIABILITYOFTHEELEVATORWITHSAFETYTHESTRUCTUREOFSYSTEMISALSOSIMPLEANDTIGHTLYPACKEDTHEWORKINGPRINCIPLEOFTHEELEVATORCONTROLSYSTEMISTHESPOTCONTROLINFORMATIONISSENDINTOTHEPLCFROMTHECUSTOMERINPUTDEVICESFIRSTLY,THENTHEPLCCONTROLCABINETISREQUIREDTOSENDOUTTHECONTROLSIGNALTODRIVETHEEQUIPMENTSACCORDINGTOTHESYSTEMDEMANDSTHEELEVATORCANTHENPROCEEDTHEHOMOLOGOUSACTIONACCORDINGTOTHECONTROLREQUESTTHEPAPERSELECTSOMRONCOMPANY’SC200HESERIESPLC,INTRODUCINGPARTSOFSIGNALHOOKUPOFTHEELEVATORCONTROLSYSTEMANDEXPLAININGTHEFUNCTIONOFTHECONTROLCABINETLASTLYTHEAUTOMATIONPROGRAMMINGISINTRODUCEDSIMULATEDEXPERIMENTSENUNCIATESTHATTHEDESIGNMETHODISVIABLEITCANMAKETHEPERSONNELOFTHEINDUSTRYMANAGEMENTCENTERTOLONGDISTANCEMONITORANDCONTROLTHEELEVATORINCONTROLCENTER,TOCONNECTTHEELEVATORCONTROLSYSTEMWITHINTELLIGENCEBUILDINGINDUSTRYMANAGEMENTSYSTEMBYETHERNETORSPECIALPURPOSENETWORKSUCHASLONWORKSTHEELEVATORWORKINGSTATECANALSOBETIMELYWATCHEDTHESENOTONLYCANREALIZESCIENTIFICCENTRALIZEDMANAGEMENTOFTHEELEVATOR,BUTALSOCANLOWERTHEELEVATORMAINTENANCECOSTETCITISONEOFTHEDEVELOPINGDIRECTIONOFINTELLIGENCEBUILDINGELEVATORCONTROLSYSTEMKEYWORDSPLCINTELLIGENCEBUILDINGELEVATORCONTROLSYSTEMWORKINGPRINCIPLEPROGRAMDESIGNⅠINTRODUCTIONIN1980STHEFIRSTINTELLIGENCEMANSIONHADBEENCOMPLETEDINAMERICA,THENINTELLIGENCEBUILDINGHASBEENABROADLYTAKENATTENTIONSBYTHEWHOLEWORLDTHECONCEPTOFINTELLIGENCEBUILDINGHASBEENPUTDIFFERENTMEANINGSALONGWITHTHEDEVELOPMENTOFSOCIETYTHEEARLYSTAGEINTELLIGENCEBUILDINGHADBEENTHOUGHTTHATITISEQUALTOTHEINTELLIGENTMANSION,BUTNOWTHEINTELLIGENCEBUILDINGNOTONLYINCLUDESTHEINTELLIGENCEMANSIONSBUTALSOINVOLVESINTELLIGENCERESIDENTIALDISTRICTSTHISPAPERMAINLYDISCUSSESONESUBSYSTEMOFINTELLIGENCEBUILDINGSYSTEMTHEELEVATORCONTROLSYSTEMININTELLIGENCERESIDENTIALDISTRICTSTHEENTERPRISE’SINFORMATIONMANAGINGSYSTEMMAINLYTAKESCHARGEOFTHETHINGSWHICHRELATEDTOTHEDAILYLIFE,FOREXAMPLESUPERVISINGTHEDISTRICTEQUIPMENTS,MANAGINGVEHICLES,DISPOSINGCRITICALSITUATIONSANDSOONTHEELEVATORSUPERVISINGANDCONTROLSYSTEMISALSONECESSARYTOTHEINTELLIGENCERESIDENTIALDISTRICTSHOWTOMAKEPEOPLEFEELSAFE,STABLEANDCOMFORTABLEANDHOWTOSAVEENERGYRESOURCESANDPROTECTENVIRONMENTSANDSOONARETHEBASICREQUIREMENTSTOTHEELEVATORCONTROLSYSTEMPLCISACOMMONINDUSTRYCONTROLDEVICEITISASPECIALINDUSTRYCONTROLCOMPUTERWHICHHASTHEPERFECTFUNCTIONANDSIMPLEFRAMETHEPLCSTRONGABILITYININTERFERENCEANDSOONMAKESTHEELEVATORINDUSTRYONEAFTERANOTHERTOAPPLYTHEPLCTOTHEELEVATORCONTROLSYSTEM,INORDERTOREPLACETHERELAYBEINGUSEDINTRADITIONALELEVATORCONTROLSYSTEMTHEAPPLICATIONOFPLCINTHEELEVATORCONTROLSYSTEMREDUCESTHEBREAKDOWNRATEANDEFFICIENTLYIMPROVESTHEOPERATINGRELIABILITYOFTHEELEVATORWITHSAFETYTHISPAPERMAINLYDISCUSSESTHEELEVATORCONTROLSYSTEM’SⅣPROGRAMDESIGNTHEDESIGNINCLUDESTWOPARTSHARDWAREANDSOFTWARETHEHARDWAREDESIGNISTHEBASEOFSOFTWARECONSIDERINGTHATTHECONTROLDEMANDSARERELATIVELYCOMPLEX,WEDESIGNTHEPROGRAMSSEPARATELYACCORDINGTOTHECONTROLFUNCTIONFURTHERMORE,WEFOLLOWTHEPRINCIPLEASFOLLOWSWHENTHEELEVATORISASCENDING,THEASCENDINGDEMANDSAREPRIORTOOTHERDEMANDSWHENTHEELEVATORISDESCENDING,THEDESCENDINGDEMANDSAREPRIORTOOTHERDEMANDSTHESEQUENTIALFUNCTIONCHARTSFCISADOPTEDDURINGTHEBOXESTOFORMELEVATOR’SEXECUTIVECIRCUITRYDESIGNITISAMETHODSPECIALLYUSEDININDUSTRIALSEQUENTIALCONTROLTHESFCMETHODCANDESCRIBETHESYSTEM’SWORKINGPROCEDUREINGREATDETAILFOREXAMPLETHEREISATHREELAYERSINTELLIGENCEBUILDINGASUBPROGRAM,THECALLINGFROMTHETHIRDFLOORASELEVATORINTHEFIRSTFLOOR,ISSHOWNINFIG3WITHSFC
下載積分: 10 賞幣
上傳時間:2024-03-17
頁數(shù): 8
大小: 0.18(MB)
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簡介:外文資料外文資料BATCHUSPANDANAETAL/INTERNATIONALJOURNALONCOMPUTERSCIENCEANDENGINEERINGIJCSESECURITYMANAGEMENTSYSTEMFOROILFIELDBASEDONGSMTECHNOLOGYBATCHUSPANDANAMTECHSTUDENT,DEPARTMENTOFECESRIVASAVIENGGCOLLEGE,TADEPALLIGUDEMADDANKIPURNARAMESHASSOCIATEPROFESSOR,DEPARTMENTOFECESRIVASAVIENGGCOLLEGE,TADEPALLIGUEMPGOPALAREDDYASSTPROFESSOR,DEPARTMENTOFECESRIVASAVIENGGCOLLEGE,TADEPALLIGUEMABSTRACTSECURITYMANAGEMENTATTHEINDUSTRIESMAINLYDURINGTHENIGHTTIMESATTHEOILFIELDISACRITICALTASKFORTHESECURITYPEOPLECHECKINGFORTHEOILTHEFTING,POWERFAILURE,TEMPERATURERANGECHECKING,TILTCHECKINGOFTHETANKS,LEAKAGEOFOILBYROTATINGTHEPUMPDONEBYTHETHIEVESISACRITICALTASKFORTHESECURITYPEOPLEIMPROVETHESECURITYLEVELBYIMPLANTATIONOFWIRELESSEMBEDDEDTECHNOLOGYWILLSOLVETHISPROBLEMBYREDUCINGTHEMANUALPOWER,ATTHESITELOCATIONS,ANDBYIMPROVINGTHESECURITYLEVELWITHTHEHELPOFGSMBASEDWIRELESSTECHNOLOGYWHICHCONSISTOFTRANSMITTERGSMMODEMATTHESITELOCATIONANDRECEIVERISTHEGSMMOBILEINFORMATIONTRANSMITTEDBYTHEGSMMODEMATTHEPLANTLOCATIONWILLBESENTTOTHERESPECTIVEPERSON’SMOBILEASATEXTMESSAGETHESECURITYPEOPLEWILLTAKEAPPROPRIATEACTIONACCORDINGTOTHEPROBLEMFORTHISWEAREUSEDLPC2148ARM7BASEDMICROCONTROLLER,WHICHISTHECURRENTDOMINANTMICROCONTROLLERINMOBILEBASEDPRODUCTSANDSOFTWAREDEVELOPMENTTOOLSASKEIL,FLASHMAGICFORLOADINGHEXFILEINTOTHEMICROCONTROLLERKEYWORDSLPC2148ARM7EMBEDDED‘C’KEILFLASHMAGICSIM300GSMMODEIINTRODUCTIONGSMTECHNOLOGYHASBEENUSEDWORLDWIDEFORALMOSTTWODECADESATTHEENDOFFIRSTQUARTEROF2007THEREWERE2,278,095,380GSMSUBSCRIBERS,WHICHREPRESENTALMOST805OFALLMOBILENETWORKSUBSCRIBERSWIRELESSINTELLIGENCEORGANIZATIONINFORMATION’SSCOURIAS,1995WITHRAPIDDEVELOPMENTOFNATIONALANDINTERNATIONALECONOMICCONSTRUCTION,THEREISAGREATDEMANDANDFIG1BLOCKDIAGRAMOFSECURITYMANAGEMENTSYSTEMFOROILFIELDBASEDONGSMTECHNOLOGYTHETSOP1738IRTRANSMITTERANDRECEIVER,L7805,LIMITSWITCH,MERCURYTILTSWITCH,LM35MODULESAREINTERFACEDTOI/OPORTSOFTHELPC2148ARM7MICROCONTROLLERTHELPC2148CONTROLLERCONTINUOUSLYMONITORSTHETANKLEVEL,TILTOFTHEVALVE,ANGLEOFTHEVALVEROTATIONIFANYCHANGEOFPARAMETERSOCCURSATTHECORRESPONDINGMODULESTHECONTROLLERTURNSONBUZZER,DISPLAYSTHEMESSAGEONLCDDISPLAYANDATTHESAMETIMETHECONTROLLERACTIVATESTHEGSMMODEMANDGSMMODEMSENDSTHEMESSAGETOTHETWOAUTHORIZEDPERSONSBYUSINGGSMBASEDWIRELESSTECHNOLOGYFIG2MAINCIRCUITBOARDWITHOUTCHASSIS
下載積分: 10 賞幣
上傳時間:2024-03-12
頁數(shù): 12
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下載積分: 13 賞幣
上傳時間:2023-07-21
頁數(shù): 0
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下載積分: 13 賞幣
上傳時間:2023-07-21
頁數(shù): 0
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簡介:附件附件1外文資料翻譯譯文外文資料翻譯譯文ASPNETASPNET概述概述ASPNET是一個統(tǒng)一的WEB開發(fā)模型,它包括您使用盡可能少的代碼生成企業(yè)級WEB應(yīng)用程序所必需的各種服務(wù)。ASPNET作為NETFRAMEWORK的一部分提供。當您編寫ASPNET應(yīng)用程序的代碼時,可以訪問NETFRAMEWORK中的類。您可以使用與公共語言運行庫CLR兼容的任何語言來編寫應(yīng)用程序的代碼,這些語言包括MICROSOFTVISUALBASIC、C、JSCRIPTNET和J。使用這些語言,可以開發(fā)利用公共語言運行庫、類型安全、繼承等方面的優(yōu)點的ASPNET應(yīng)用程序。ASPNET包括?頁和控件框架?ASPNET編譯器?安全基礎(chǔ)結(jié)構(gòu)?狀態(tài)管理功能?應(yīng)用程序配置?運行狀況監(jiān)視和性能功能?調(diào)試支持?XMLWEBSERVICES框架?可擴展的宿主環(huán)境和應(yīng)用程序生命周期管理?可擴展的設(shè)計器環(huán)境ASPNET頁和控件框架是一種編程框架,它在WEB服務(wù)器上運行,可以動態(tài)地生成和呈現(xiàn)ASPNET網(wǎng)頁??梢詮娜魏螢g覽器或客戶端設(shè)備請求ASPNET網(wǎng)頁,ASPNET會向請求瀏覽器呈現(xiàn)標記(例如HTML)。通常,您可以對多個瀏覽器使用相同的頁,因為ASPNET會為發(fā)出請求的瀏覽器呈現(xiàn)適當?shù)臉擞洝5?,您可以針對諸如MICROSOFTINTERNETEXPLORER6的特定瀏覽器設(shè)計庫使用ASPNETFORMS身份驗證和ASPNET成員資格來管理身份驗證。此外,可以使用WINDOWS組或您自己的自定義角色數(shù)據(jù)庫(使用ASPNET角色)來管理WEB應(yīng)用程序的功能和信息方面的授權(quán)。您可以根據(jù)應(yīng)用程序的需要方便地移除、添加或替換這些方案。ASPNET始終使用特定的WINDOWS標識運行,因此,您可以通過使用WINDOWS功能(例如NTFS訪問控制列表ACL、數(shù)據(jù)庫權(quán)限等等)來保護應(yīng)用程序的安全。ASPNET提供了內(nèi)部狀態(tài)管理功能,它使您能夠存儲頁請求期間的信息,例如客戶信息或購物車的內(nèi)容。您可以保存和管理應(yīng)用程序特定、會話特定、頁特定、用戶特定和開發(fā)人員定義的信息。此信息可以獨立于頁上的任何控件。ASPNET提供了分布式狀態(tài)功能,使您能夠管理一臺計算機或數(shù)臺計算機上同一應(yīng)用程序的多個實例的狀態(tài)信息。通過ASPNET應(yīng)用程序使用的配置系統(tǒng),可以定義WEB服務(wù)器、網(wǎng)站或單個應(yīng)用程序的配置設(shè)置。您可以在部署ASPNET應(yīng)用程序時定義配置設(shè)置,并且可以隨時添加或修訂配置設(shè)置,且對運行的WEB應(yīng)用程序和服務(wù)器具有最小的影響。ASPNET配置設(shè)置存儲在基于XML的文件中。由于這些XML文件是ASCII文本文件,因此對WEB應(yīng)用程序進行配置更改比較簡單。您可以擴展配置方案,使其符合自己的要求。ASPNET包括可監(jiān)視ASPNET應(yīng)用程序的運行狀況和性能的功能。使用ASPNET運行狀況監(jiān)視可以報告關(guān)鍵事件,這些關(guān)鍵事件提供有關(guān)應(yīng)用程序的運行狀況和錯誤情況的信息。這些事件顯示診斷和監(jiān)視特征的組合,并在記錄哪些事件以及如何記錄事件等方面提供了高度的靈活性。ASPNET支持兩組可供應(yīng)用程序訪問的性能計數(shù)器?ASPNET系統(tǒng)性能計數(shù)器組?ASPNET應(yīng)用程序性能計數(shù)器組
下載積分: 10 賞幣
上傳時間:2024-03-15
頁數(shù): 15
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簡介:APPLICATIONOFPLCINTHEELEVATORCONTROLSYSTEMOFINTELLIGENCEBUILDINGLIFENGLIAN1RENQINGLIAN21TAIYUANUNIVERSITYOFTECHNOLOGY,TAIYUAN,CHINA,2TAIYUANUNIVERSITYOFSCIENCEANDTECHNOLOGY,TAIYUAN,CHINA,PHONE0863516150064EMAILGHLLFL163COMABSTRACTTHEPAPERMAINLYDISCUSSESONESUBSYSTEMOFINTELLIGENCEBUILDINGSYSTEMTHEELEVATORCONTROLSYSTEMTHEPLCSTRONGABILITYININTERFERENCEANDSOONMAKESTHEELEVATORINDUSTRYONEAFTERANOTHERTOAPPLYTHEPLCTOTHEELEVATORCONTROLSYSTEMINORDERTOREPLACETHERELAYBEINGUSEDINTRADITIONALELEVATORCONTROLSYSTEMTHEAPPLICATIONOFPLCINTHEELEVATORCONTROLSYSTEMREDUCESTHEBREAKDOWNRATEANDEFFICIENTLYIMPROVESTHEOPERATINGRELIABILITYOFTHEELEVATORWITHSAFETYTHESTRUCTUREOFSYSTEMISALSOSIMPLEANDTIGHTLYPACKEDTHEWORKINGPRINCIPLEOFTHEELEVATORCONTROLSYSTEMISTHESPOTCONTROLINFORMATIONISSENDINTOTHEPLCFROMTHECUSTOMERINPUTDEVICESFIRSTLY,THENTHEPLCCONTROLCABINETISREQUIREDTOSENDOUTTHECONTROLSIGNALTODRIVETHEEQUIPMENTSACCORDINGTOTHESYSTEMDEMANDSTHEELEVATORCANTHENPROCEEDTHEHOMOLOGOUSACTIONACCORDINGTOTHECONTROLREQUESTTHEPAPERSELECTSOMRONCOMPANY’SC200HESERIESPLC,INTRODUCINGPARTSOFSIGNALHOOKUPOFTHEELEVATORCONTROLSYSTEMANDEXPLAININGTHEFUNCTIONOFTHECONTROLCABINETLASTLYTHEAUTOMATIONPROGRAMMINGISINTRODUCEDSIMULATEDEXPERIMENTSENUNCIATESTHATTHEDESIGNMETHODISVIABLEITCANMAKETHEPERSONNELOFTHEINDUSTRYMANAGEMENTCENTERTOLONGDISTANCEMONITORANDCONTROLTHEELEVATORINCONTROLCENTER,TOCONNECTTHEELEVATORCONTROLSYSTEMWITHINTELLIGENCEBUILDINGINDUSTRYMANAGEMENTSYSTEMBYETHERNETORSPECIALPURPOSENETWORKSUCHASLONWORKSTHEELEVATORWORKINGSTATECANALSOBETIMELYWATCHEDTHESENOTONLYCANREALIZESCIENTIFICCENTRALIZEDMANAGEMENTOFTHEELEVATOR,BUTALSOCANLOWERTHEELEVATORMAINTENANCECOSTETCITISONEOFTHEDEVELOPINGDIRECTIONOFINTELLIGENCEBUILDINGELEVATORCONTROLSYSTEMKEYWORDSPLCINTELLIGENCEBUILDINGELEVATORCONTROLSYSTEMWORKINGPRINCIPLEPROGRAMDESIGNⅠINTRODUCTIONIN1980STHEFIRSTINTELLIGENCEMANSIONHADBEENCOMPLETEDINAMERICA,THENINTELLIGENCEBUILDINGHASBEENABROADLYTAKENATTENTIONSBYTHEWHOLEWORLDTHECONCEPTOFINTELLIGENCEBUILDINGHASBEENPUTDIFFERENTMEANINGSALONGWITHTHEDEVELOPMENTOFSOCIETYTHEEARLYSTAGEINTELLIGENCEBUILDINGHADBEENTHOUGHTTHATITISEQUALTOTHEINTELLIGENTMANSION,BUTNOWTHEINTELLIGENCEBUILDINGNOTONLYINCLUDESTHEINTELLIGENCEMANSIONSBUTALSOINVOLVESINTELLIGENCERESIDENTIALDISTRICTSTHISPAPERMAINLYDISCUSSESONESUBSYSTEMOFINTELLIGENCEBUILDINGSYSTEMTHEELEVATORCONTROLSYSTEMININTELLIGENCERESIDENTIALDISTRICTSTHEENTERPRISE’SINFORMATIONMANAGINGSYSTEMMAINLYTAKESCHARGEOFTHETHINGSWHICHRELATEDTOTHEDAILYLIFE,FOREXAMPLESUPERVISINGTHEDISTRICTEQUIPMENTS,MANAGINGVEHICLES,DISPOSINGCRITICALSITUATIONSANDSOONTHEELEVATORSUPERVISINGANDCONTROLSYSTEMISALSONECESSARYTOTHEINTELLIGENCERESIDENTIALDISTRICTSHOWTOMAKEPEOPLEFEELSAFE,STABLEANDCOMFORTABLEANDHOWTOSAVEENERGYRESOURCESANDPROTECTENVIRONMENTSANDSOONARETHEBASICREQUIREMENTSTOTHEELEVATORCONTROLSYSTEMPLCISACOMMONINDUSTRYCONTROLDEVICEITISASPECIALINDUSTRYCONTROLCOMPUTERWHICHHASTHEPERFECTFUNCTIONANDSIMPLEFRAMETHEPLCSTRONGABILITYININTERFERENCEANDSOONMAKESTHEELEVATORINDUSTRYONEAFTERANOTHERTOAPPLYTHEPLCTOTHE1625SIGNALLINESWERESEPARATELYSENTTOEACHFLOORJUNCTIONBOXESTOFORMELEVATOR’SEXECUTIVECIRCUITRYFIG2PARTOFELEVATORCONTROLSYSTEMSIGNALHOOKUPSFIG3ASUBPROGRAMSFCTHECALLINGFROMTHETHIRDFLOORASELEVATORINTHEFIRSTFLOORⅣPROGRAMDESIGNTHEDESIGNINCLUDESTWOPARTSHARDWAREANDSOFTWARETHEHARDWAREDESIGNISTHEBASEOFSOFTWARECONSIDERINGTHATTHECONTROLDEMANDSARERELATIVELYCOMPLEX,WEDESIGNTHEPROGRAMSSEPARATELYACCORDINGTOTHECONTROLFUNCTIONFURTHERMORE,WEFOLLOWTHEPRINCIPLEASFOLLOWSWHENTHEELEVATORISASCENDING,THEASCENDINGDEMANDSAREPRIORTOOTHERDEMANDSWHENTHEELEVATORISDESCENDING,THEDESCENDINGDEMANDSAREPRIORTOOTHERDEMANDSTHESEQUENTIALFUNCTIONCHARTSFCISADOPTEDDURINGTHEDESIGNITISAMETHODSPECIALLYUSEDININDUSTRIALSEQUENTIALCONTROLTHESFCMETHODCANDESCRIBETHESYSTEM’SWORKINGPROCEDUREINGREATDETAILFOREXAMPLETHEREISATHREELAYERSINTELLIGENCEBUILDINGASUBPROGRAM,THECALLINGFROMTHETHIRDFLOORASELEVATORINTHEFIRSTFLOOR,ISSHOWNINFIG3WITHSFCWHENALLSFCAREDRAWNANDI/OADDRESSLISTSAREPRESENTED,WECANCONVERTTHESFCTOLADDERDIAGRAMLDCONSIDERINGTHESTRICTDEMANDSFORTIMEANDFORLOCKEDEACHOTHER,WEINTRODUCEWORKINGBITSTOREMEMBERWORKINGSTEPSWESHOULDWRITEOUTTHEWORKINGBITSCONTROLPROGRAM,WHICHCANLINKTOGETHER1627
下載積分: 10 賞幣
上傳時間:2024-03-13
頁數(shù): 4
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簡介:英文資料翻譯英文資料翻譯系別軟件與服務(wù)外包學院專業(yè)軟件技術(shù)班級0904姓名李欣學號100090590指導(dǎo)教師高振棟2012年4月2HTMLPAGECOULDNTDOOHSURE,IGAVEASLIGHTLYMOREINTERESTINGEXAMPLETHATDISPLAYEDTHECURRENTSERVERTIME,BUTTOBEREALLYUSEFULASCRIPTNEEDSTOPERFORMSOMEFORMOFCALCULATION,ORMANIPULATEDYNAMICINFORMATIONTOPRESENTITINSOMEINTERESTINGWAYTHELANGUAGEUSEDFORWRITINGMOSTASPPROGRAMS,ANDWHICHILLBEUSINGTHROUGHOUTTHISSERIES,ISCALLEDVBSCRIPTLIKEMOSTPROGRAMMINGLANGUAGES,VBSCRIPTLETSYOUSTOREDATAINVARIABLESAVARIABLEMAYBETHOUGHTOFSIMPLYASANAMEDLOCATIONINMEMORYWHEREDATAMAYBESTOREDVBSCRIPTISWHATISKNOWNASALOOSELYTYPEDLANGUAGE,WHICHMEANSTHATAPARTICULARVARIABLEMAYSTOREANYKINDOFINFORMATION,BEITANUMBER,APIECEOFTEXT,ADATE,ORSOMEMORECOMPLICATEDCHUNKOFDATAASOPPOSEDTOSTRICTLYTYPEDLANGUAGESWHEREYOUCANONLYSTOREONEKINDOFINFORMATIONINEACHVARIABLEBEFOREYOUCANUSEAVARIABLE,THOUGH,YOUMUSTDECLAREITTHATIS,YOUMUSTLETASPKNOWTHATYOUWANTTOCREATEAVARIABLEWITHAPARTICULARNAMELETSLOOKATABASICEXAMPLETOHELPSOLIDIFYTHESECONCEPTSINYOURMINDSAYYOUWEREWRITINGAWEBPAGETHATPERFORMEDCONVERSIONSBETWEENCELSIUSANDFAHRENHEITTEMPERATURESINCOUNTRIESWHERECELSIUSISUSED,20CISCOMMONLYACCEPTEDASTHEVALUEFORROOMTEMPERATURETHEFOLLOWINGCODECREATESAVARIABLECALLEDINTROOMTEMPC,ANDTHENASSIGNSITAVALUEOF20NEWREVISED2NDEDITIONOUTNOW“BUILDYOUROWNDATABASEDRIVENWEBSITEUSINGPHPMYSQL“FULLYUPDATEDFORPHP43INSTALLATIONINSTRUCTIONSFORMACOSXFULLINDEXPROVIDEDNEWWIDERBOOKSIZEENHANCEDFONTSNEWCOVERDESIGNLAYFLATSPINEALLCONTENTREVISITEDDOWNLOADTHEFIRST4CHAPTERSFREE
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上傳時間:2024-03-16
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上傳時間:2023-07-21
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下載積分: 13 賞幣
上傳時間:2023-07-21
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上傳時間:2023-07-21
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