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1、外文資料:Regardalongwiththenetworktechnologydailypopularizationandtheinformationconstruction,nowtheschoolgenerallyallcompoundedthetestsafemonitoringequipment,andhasbuiltthemanagementinformationsysteminthisfoundation,toinformationconstructionpositiveimpetusfunction.Buthasthesoftwareconstructioninthepract
2、icalworktofallbehindthephenomenonwhichconstructstothehardware,forexample,theeducationadministrationlevelalsopausestoexaminee'sinspectioninthetraditionaltestpattern,notonlytheefficiencyislow,moreoveralsohasmanymalpractices,createstheinformationresourcethewaste.Testnon-paper,network,notonlycaneffe
3、ctivelyreducethecorrelationpersonnel'sworkload,thebetterusecomputerandthenetworksuperiority,enhancestheworkingefficiency,alsocanfairlycausethetest,tobefair.Basedonthiskindofdemand,wedevelopedsetofperformancestablyforthetestdesign,safehavebeenreliablethenetworkwhich,theeaseofoperationwasallowedto
4、satisfymassivelysimultaneouslyusestotakeatestthesystem.Causesthetestthesecurity,fairness,fairgreatlytoenhance.Afterthissystemactualmovementuses,effectgood,notonlygreatlyadvancedthetestinformationconstructionadvancement,moreovercausestheschooltoexaminee'sinspectionmorescientific,air,fair,tobehigh
5、lyeffectiveandthenetwork.Thenetworktestsystemshouldbeabletosatisfythemassiveexamineesinanyplace,anytimeallcanparticipateinthetest,andautomaticjudgmentresult.Throughtothetestservicedemandmultianalysis,themainfunctionwhichthissystemshouldprovideasfollows:1) Theexamineemayon-linecarryonthetest,afterthe
6、testhadfinishedbycomputerautomaticjudgmentscore,andtherecordingresult,theexamineealsomayexaminethestandardanswer.Ifthetesttime,thesystemautomaticpromptcompletesanassignmentandstopsdoinganswers.2) Theteachermayon-lineestablishtherevisionquestionbank,revisestheexamineeindividualmaterial,andmonitorsthe
7、examinationplacesituationandsoon.3) themanagermayon-lineestablishreferencematerialandsoontheexaminee,teacher,theverificationquestionbank,arrangestheexamineetotakeatest,revisestheexamineeandtheexaminationplacecondition,inquirestheexamineetotakeatesttheresult,monitorstheexaminationplacesituationaswell
8、astheestablishmenttestprojectwithteststhetestquestionnumberandsoon.Moreoverfortheguaranteetestfair,isfair,theexaminationpapertestquestionstochasticallyextractsbythecomputerfromthequestionbank.Forstrictlywillceasethetesttocheatthebehavior,thesystemlaterisbestalsoshouldprovidethefunctionwhichthefinger
9、printconfirmationwillregister.Itsmainflowis:Aftertheuserbasisisauthorizedregisters,thesystembasisuserjurisdictiondifference,establishesthecorrespondingoperation.Afterthetrainattendantregistersmaycarryonthetest,operationandsoonexaminationresultandstandardanswer;Aftertheteacherregistersmaycarryonrevis
10、esoperationandsoonexaminee'sindividualmaterial,revisionquestionbank,revisionuserpasswordaswellasmonitoringtestsituation;Afterthemanagerregistersbesideshasteacher'sallfunctions,butalsomaycarryontheverificationquestionbank(onlyhasverifiedquestionbankonlythentobeallowedtocarryontest),establishm
11、entoperationandsoontesttime,inquiry,printingtestresult.Alsomayestablishfollowingseveralitems:Testworkstation:Carriesonthetesttotheexamineethecustomerendprocedure.Mainlyprovidedhascarriedonaccordingtothesystemdispositionstochasticallysetsthetopicofacomposition,theconfirmationregisters,testfunctionand
12、soontimeprompt,automaticjudgmentresult,examinationtestresultaswellasstandardanswer.TestworkstationdividesintothecustomerendprocedureandtheWebwayintherealizationway,formerallowstheexaminee(supporttouchesscreentestpattern)throughthecustomerendprocedurethewaytocarryonthetest,latterallowstheexamineetoca
13、rryonthetestthroughthetestspecial-purposenetwork.Thetestestablishestheworkstation:Carriesontheestablishmenttotetestservicethecustomerendprocedure.Mainlyprovidedtherevisionquestionbank,theverificationquestionbank,revisedtheexamineematerial,establishestheexaminee/examinationplacecondition,theinquiry/p
14、rintingtestresult,thequestionbankinducts/derivesfunctionandsoonfunctionaswellasmonitoringtestsituation.Testapplicationserver:Networkon-linetestsystemapplicationserver.Mainlyhasrealizedthedatacushionandthetestservicelogicsealandduplicateusesthefunction,istakesatesttheworkstation,thetestestablishesthe
15、workstationandthedatabaseserverconnection.Hasprovidedtherichconnectionusingtheserver,mayincreaseorthereducedservicerulethroughthemoduleway,consideredlaterwilltakeatesttheservicepromotion,alsoshouldreservethenewtesttypeconnectionusingtheserverlevel,willcauselaterthesystemtoexpandconveniently.Moreover
16、,forguaranteetesteffectiveness,usingserversupporthotbackupdatabaseserverpattern,namelyifpresentlyisusingthedatabaseserverbreaksdown,theninthesystemdispositionreservedatabaseserverautomaticcutoverforthecurrentdatabaseserver,alltheseisdoesnotknowintheuserwithintheinterventionsituationcarrieson.Through
17、applicationserverleveleffectiveness,trulycausedthetestservicetoachievetheuseeasily,thefunctionformidable,theperformancestable,themodulardegreewasstrong,hassatisfiedthenewtimetoaninformationconstructionhigherrequest.Furthermore,consideredthesystemthestabilitywithcarriesouttheefficiency,intheanalysisn
18、etworkconfigurationfoundation,thesystemlatermightselectdistributionalthreeC/SandB/Swillmixwiththeoverheadconstructionmethod,namely:Theexamineeifmiscarriesonthetestinthissection,maychoosetheC/Sstructuretotouchthescreentestandtheexaminationsitetestpattern;Iftheexamineeiscarriesonthetestintheoutsideare
19、as,maychoosetheB/Sstructuretheexaminationsitetestpattern.Thenetworkon-linetestsystemneedstocarryonthedatathroughthenetworkthetransmission,thereforeappliestheserver,theWebserverandthedatabaseserversecuritymustfromthesystemdesigntimecarriesontheplan.Wemightusebelowthesecuritymeasure:1) Installsthereli
20、ablefirewall,carriesontheeffectivecontainmenttotheexteriormaliciousattack.2) Theserver(includingappliesserver,databaseserverandtheWebserver)theharddiskdistricttransformationistheNTFSform,opensuresportivejurisdictionaccordingtothedifferentdemandfortheuser.3) MaywritetheessentialcodetheDLLmodule,noton
21、lystrengtheneedthesecurity,simultaneouslyalsocausedthesystemthemodulardegreetostrengthen,enhancedthesystemperformance.4) Maycarryontwotimesofencryptionsinthedatabasetotheessentialdata.5) 2,000databackupswithrestoresthefunctionusingSQLtheSERVER,guaranteesthedatabaseinformationtheintegrityandthesecuri
22、ty.Thecurrentsoftwarequitepopularsystemstructuralmodelmainlyhas:C/SstructuralmodelandB/Sstructuralmodel.Thesetwokindsofstructuresmaydivideintotwowiththemultilayeredoverheadconsaturation,themaindifferenceliesinwhetherhasusedthemidleware(forexampleCOM+orCORBA)comestheoverheadconstructiontoapplytheserv
23、erlevel.ThisstructuralmodelunifieddistributionalmultilayeredC/SandtheB/Smeritdesigns,dividesintothecustomerlevel,businesslogiclevelandthedatalevelintheusualsituation.Customerlevel:Belowmainlyusesfortosatisfytheoverallsystemeachkindofvisitdemandandprocessesworks:Thereceiveuser'sinput,carriesonthe
24、analysisinspectiontouser'sinputandmakescorrespondingprocessing;Sendsoutthedatatotheservertorequestthat,demonstratedbymovementresultwhichtransmitsusingtheserver.Thecustomerlevelusuallyiscomposedbythecustomeradvancement,thecustomeradvancementmainlyincludestheadvancementinthismodelwhichtheIEbrowser
25、dynamicfoundationtheadvancementaswellasthecustomerendtestworkstationfoundsandsoon.Businesslogiclevel:Willberesponsibletoreceivetherequestwhichwilltransmitfromthecustomerendorthetourandtorequestwillbequeaththefirstfloortocarryonprocessing,simultaneouslywillrequesttheprocessingresulttransmissionforthe
26、customerendorthebrowser.BusinesslogicleveladvancementmainlyiscomposedbymiddlewareMTS/COM+aswellassomerelatedprocessingadvancements.MicrosoftCorporationhaspromotedWindowsDNAundertheWindowsplatform(DistributedinterNetApplicationArchitecture,distributionnetworkapplicationstructure)strategy.TakesWindows
27、COM+intheDNAstrategythemiddleware.IntheWindows2,000aboveoperatingsystems,COM+hasbecomeasystempart.COM+wastheintermediatelevelhascharacteristicprovidedtheloadbalance,theobjectpond(ObjectPooling),businesscharacteristicandsoonaseriesofforcesupport,andtheprocedurewhichworkedinCOM+receivestheoperatingsys
28、temtheprotection,thusthebiggestguaranteesystemsecurity,stableandwashighlyeffective.Inthismodel,mainlythroughtheADOrealizationdatadynamicration,ADOistheMicrosoftcurrentmainstreamdataaccessingmodule,compareswiththeformerdataaccessingtechnology,ithasprovidedtheextremelysimpleobjectmodel,andhassealedthe
29、complexfirstfloorvisittechnology.Datalevel:Mainlyprovidesthedigitaldataserviceforbusinesslogiclevel,likethestoreddatumoperatingresult,returnstothedataretrievalresultandsoon.ThisstructuralmodelhasovercometwoC/Smalpractice,fullyhasuseddistributionalmultilayeredC/SandthemultilayeredB/Smerit,extremelygo
30、odhasusedtheexistingnetworkresources,andistotheexistingnetworkresourceseffectiveintegration,theuseaswellastheexpansion.ThenwhatisXML?XML(eXtendedMarkupLanguage)isonekindofmarklanguage,likesHTMLwhichweisfamiliarwithtobesame,buttheXMLlabelisaccordingtoownneedstocomebythepeopletohavecustom-made,inother
31、words,anywordandthecharacterallmaydoforthelabeluses,solongascantheaccurateexpressiondataattribute.TheaccurateexpressiondatameaningisthebiggestadvantagewhichXMLbrings.Moreover,theXMLusetextmodesavesitsform,isadvantageousforbetweentheprocedure,theoperatingsystemlinksup,theexchange,theadaptionatpresent
32、theInternetdevelopment.XMLappearedtheshortseveralyearstoobtainthewidespreadapplication,atpresentnewlypromotessoftwarenearlycouldsupportXML.ForexampleMicrosoftNetseriessoftware,Officeseriessoftwareandsoon.Doesnotleaveforseveralyears,XMLcanreplaceHTMLtobecomeonInternetthestandardmarklanguage?Thissyste
33、mifintroducestheXMLlanguageexpressiondatatheadvantage,iscausesinthesystemthecustomerenddatademonstrationandthesystemprocessingdataseparation,reducesthedevelopmentsystemcomplex,reducesthesystemprocesstime,reducesthenetworktransmissionquantity,thusenhancesthesystemtocarryouttheefficiency.Theunifiedmod
34、elinglanguage(UnifiedModelingLanguage,UML)istheobject-orientedsoftwarestandardizedmodelinglanguage.Becauseitssimple,isunified,alsocanexpressinthesoftwaredesignthetendencyandthestaticinformation,atpresentalreadybecamethevisiblemodelinglanguageinfactindustrystandard.Fromenterpriseinformationsystemtoba
35、seonWebdistributionalapplication,evenisstrictreal-timeinsertsthetypesystemallsuitablytocomeinhandyUMLtocomethemodeling.Thisisonekindofrichexpressionstrengthlanguage,maydescribeeachkindofviewwhichthedevelopmentneeds,thentakethisasfoundationassemblysystem.ThissystemifintroducesUMLthemainsuperiorityenh
36、ancesthesoftwaredevelopmentefficiency,reducesthedevelopmenttime,savesthedevelopmentcost.TaketheUMLlanguagemodelingshouldbebyRationalCorporation'sRosetoolasbest.ButRosequiteexpensive,andRosequiteishuge,usesisnottooconvenient.BorlandCorporationproducestheModelMakermodelingtoolnotonlysupports,moreo
37、veralsohasitsoriginalplaceintheobjectmodeling.ThereforethemodelingtoolselectsModelMaker.翻譯:隨著網(wǎng)絡(luò)技術(shù)的日益普及和信息化建設(shè)的出視,現(xiàn)在學(xué)校普遍都配制了考試安全監(jiān)控設(shè)備,并在此基礎(chǔ)上搭建了管理信息系統(tǒng),對(duì)信息化建設(shè)起到了積極的推動(dòng)作用。但在實(shí)際工作中存在著軟件建設(shè)落后于硬件建設(shè)的現(xiàn)象,例如,教育管理層對(duì)考生的考核還停留在傳統(tǒng)的考試模式,不僅效率低下,而且還存在許多弊端,造成信息資源的浪費(fèi)??荚嚨臒o(wú)紙化、網(wǎng)絡(luò)化,不僅能有效減少相關(guān)人員的工作量,較好的利用計(jì)算機(jī)與網(wǎng)絡(luò)的優(yōu)勢(shì),提高工作效率,也能使考試更加公平
38、、公正?;谶@種需求,我們?yōu)榭荚囋O(shè)計(jì)開發(fā)了一套性能穩(wěn)定、安全可靠、操作方便的可以滿足大量同時(shí)使用的網(wǎng)絡(luò)考試系統(tǒng)。使得考試的安全性、公平性、公正性大大提高。本系統(tǒng)實(shí)際運(yùn)行后使用后,效果良好,不僅大大推進(jìn)了考試的信息化建設(shè)進(jìn)程,而且使得學(xué)校對(duì)考生的考核更加科學(xué)化、公平化、公正化、高效化和網(wǎng)絡(luò)化。網(wǎng)絡(luò)考試系統(tǒng)應(yīng)該能滿足大量考生在任何地方、任何時(shí)間都能參加考試,并自動(dòng)判斷成績(jī)。通過對(duì)考試業(yè)務(wù)需求的詳細(xì)分析,本系統(tǒng)應(yīng)提供的主要功能如下:1)考生可以在網(wǎng)上進(jìn)行考試,考試結(jié)束后由計(jì)算機(jī)自動(dòng)判斷分?jǐn)?shù),并記錄成績(jī),考生還可以查看標(biāo)準(zhǔn)答案。如果考試時(shí)間到,系統(tǒng)自動(dòng)提示交卷并停止作答。2)教員可以在網(wǎng)上建立、修改題
39、庫(kù),修改考生個(gè)人資料,監(jiān)控考場(chǎng)情況等。3)管理員可以在網(wǎng)上建立考生、教員等檔案資料,審核題庫(kù),安排考生考試,修改考生和考場(chǎng)狀態(tài),查詢考生考試成績(jī),監(jiān)控考場(chǎng)情況以及設(shè)置考試項(xiàng)目與考試題數(shù)等。另外為保證考試的公平、公正,試卷的試題由計(jì)算機(jī)隨機(jī)從題庫(kù)抽取。為嚴(yán)格杜絕考試的作弊行為,系統(tǒng)以后最好還應(yīng)該提供指紋驗(yàn)證登錄的功能。其主要流程是:用戶根據(jù)授權(quán)登錄后,系統(tǒng)根據(jù)用戶權(quán)限的不同,設(shè)置相應(yīng)的操作操作。乘務(wù)員登錄后可以進(jìn)行考試,查看成績(jī)及標(biāo)準(zhǔn)答案等操作;教員登錄后可以進(jìn)行修改考生的個(gè)人資料、修改題庫(kù)、修改用戶密碼以及監(jiān)控考試情況等操作;管理員登錄后除具有教員的一切功能外,還可以進(jìn)行審核題庫(kù)(只有審核過的
40、題庫(kù)才可以進(jìn)行考試)、設(shè)置考試時(shí)間、查詢、打印考試成績(jī)等操作。也可以設(shè)置以下幾項(xiàng):考試工作站:對(duì)考生進(jìn)行考試的客戶端程序。主要提供了根據(jù)系統(tǒng)配置進(jìn)行隨機(jī)出題、驗(yàn)證登錄、考試時(shí)間提示、自動(dòng)判斷成績(jī)、查看考試成績(jī)以及標(biāo)準(zhǔn)答案等功能。其中考試工作站在實(shí)現(xiàn)方式上又分為客戶端程序與Web方式,前者允許考生通過客戶端程序(支持觸摸屏考試模式)的方式進(jìn)行考試,后者則允許考生通過考試專用網(wǎng)進(jìn)行考試??荚囋O(shè)置工作站:對(duì)考試業(yè)務(wù)進(jìn)行設(shè)置的客戶端程序。主要提供了修改題庫(kù)、審核題庫(kù)、修改考生資料、設(shè)置考生/考場(chǎng)狀態(tài)、查詢/打印考試成績(jī)、題庫(kù)的導(dǎo)入/導(dǎo)出功能以及監(jiān)控考試情況等功能。考試應(yīng)用服務(wù)器:網(wǎng)絡(luò)在線考試系統(tǒng)的應(yīng)用
41、服務(wù)器。主要實(shí)現(xiàn)了數(shù)據(jù)緩沖及考試業(yè)務(wù)邏輯的封裝與復(fù)用功能,是考試工作站、考試設(shè)置工作站與數(shù)據(jù)庫(kù)服務(wù)器的接口。應(yīng)用服務(wù)器提供了豐富的接口,可以通過模塊方式增加或者減少業(yè)務(wù)規(guī)則,考慮到以后考試業(yè)務(wù)的升級(jí),應(yīng)用服務(wù)器層還應(yīng)預(yù)留了新考試類型的接口,使得以后的系統(tǒng)擴(kuò)展較為方便。另外,為保證考試的高效性,應(yīng)用服務(wù)器支持雙機(jī)熱備份的數(shù)據(jù)庫(kù)服務(wù)器模式,即如果當(dāng)前正在使用的數(shù)據(jù)庫(kù)服務(wù)器發(fā)生故障,則系統(tǒng)配置中的后備數(shù)據(jù)庫(kù)服務(wù)器自動(dòng)切換為當(dāng)前數(shù)據(jù)庫(kù)服務(wù)器,這一切都是在用戶所不知曉與干預(yù)的情況下進(jìn)行的。通過應(yīng)用服務(wù)器層的高效,真正使考試業(yè)務(wù)做到了使用簡(jiǎn)便、功能強(qiáng)大、性能穩(wěn)定,模塊化程度強(qiáng),滿足了新時(shí)期對(duì)信息化建設(shè)的較
42、高要求。再者,考慮到系統(tǒng)的穩(wěn)定性與執(zhí)行效率,在分析網(wǎng)絡(luò)配置的基礎(chǔ)上,系統(tǒng)以后可采用分布式的三層C/S與B/S混用的架構(gòu)方式,即:考生如果是在本段進(jìn)行考試,可以選擇C/S結(jié)構(gòu)的觸摸屏考試和考點(diǎn)考試模式;如果考生是在外地進(jìn)行考試,可以選擇B/S結(jié)構(gòu)的考點(diǎn)考試模式網(wǎng)絡(luò)在線考試系統(tǒng)需要通過網(wǎng)絡(luò)來(lái)進(jìn)行數(shù)據(jù)的傳輸,因此可應(yīng)用服務(wù)器、Web服務(wù)器與數(shù)據(jù)庫(kù)服務(wù)器的安全性必須從系統(tǒng)設(shè)計(jì)時(shí)就進(jìn)行規(guī)劃。我們可采用了以下安全措施:1)加裝可靠的防火墻,對(duì)外部的惡意攻擊進(jìn)行有效的遏制。2)將服務(wù)器(包括應(yīng)用服務(wù)器、數(shù)據(jù)庫(kù)服務(wù)器與Web服務(wù)器)的硬盤分區(qū)轉(zhuǎn)化為NTFS&式,根據(jù)不同的需求為用戶開設(shè)各自的權(quán)限。3)將關(guān)鍵代碼可寫成DLL組件,不但增強(qiáng)了安全性,同時(shí)也使系統(tǒng)的模塊化程度加強(qiáng),提高了系統(tǒng)性能。4)在數(shù)據(jù)庫(kù)中對(duì)關(guān)鍵數(shù)據(jù)可進(jìn)行二次加密。5)應(yīng)用SQLSERVER200的數(shù)據(jù)備份與恢復(fù)功能,保證數(shù)據(jù)庫(kù)信息的完整與安全。當(dāng)前軟件界比較流行的系統(tǒng)結(jié)構(gòu)模型主要有:C/S結(jié)構(gòu)模型與B/S結(jié)構(gòu)模型。這兩種結(jié)構(gòu)又可分為二層和多層架構(gòu),主要的區(qū)別在于是否使用了中間件(例如COM+CORBA來(lái)架構(gòu)應(yīng)用服務(wù)器層。該結(jié)構(gòu)模型結(jié)合了分布式多層C/S與B/
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