簡(jiǎn)介：中文中文5200字，字，2700英文單詞，英文單詞，16500英文字符英文字符出處出處SOHYUNMEACHAM,CAROLVUKELICH,MYAEHAN,ETALPRESCHOOLTEACHERSLANGUAGEUSEDURINGDRAMATICPLAYJEUROPEANEARLYCHILDHOODEDUCATIONRESEARCHJOURNAL,2013,212250PRESCHOOLTEACHERS’LANGUAGEUSEDURINGDRAMATICPLAYSOHYUNMEACHAM，CAROLVUKELICH，MYAEHAN，MARTHABUELLABSTRACTTHISSTUDYSOUGHTTODESCRIBEPRESCHOOLTEACHERS’LANGUAGEUSEDURINGDRAMATICPLAYUSINGBOTHQUANTITATIVEANDQUALITATIVEANALYSESFINDINGSINDICATETHATTHETEACHERS’LANGUAGEUSEDURINGDRAMATICPLAYVARIEDAMONGTEACHERSQUANTITATIVEANALYSESREVEALEDTHEVARIABILITYOFTEACHERS’LEXICALDIVERSITY,SYNTACTICCOMPLEXITY,TALKATIVENESS,ANDCHILDRENTOTEACHERUTTERANCERATIOQUALITATIVEANALYSESREVEALEDFOURTYPESOFTEACHERPLAYINSTRUCTIONTALKPLAYEMBEDDEDINSTRUCTIONALTALK,EXPLICITINSTRUCTIONALTALK,PLAYLANGUAGECOACHING,ANDPLAYADMINISTRATIONALTALKINADDITION,THEFREQUENCYOFCHILDREN’STALKVARIEDACROSSTHECASESTHETEACHERSWHOFREQUENTLYUSEDPLAYEMBEDDEDINSTRUCTIONALTALKSCOREDRELATIVELYHIGHINTHEFREQUENCYOFCHILDREN’STALKFINDINGSSUGGESTTHATFURTHERINVESTIGATIONONTHERELATIONSHIPBETWEENTEACHERS’LANGUAGEUSEDURINGDRAMATICPLAYANDCHILDREN’SLANGUAGEPRODUCTIVITYCANBEUSEFULFORTEACHEREDUCATIONKEYWORDSDRAMATICPLAYCHILDLANGUAGETEACHER’SLANGUAGEPRESCHOOLVOCABULARYINTRODUCTIONPRESCHOOLERS’LANGUAGEDEVELOPMENTISCONSIDEREDTOBEANIMPORTANTFOUNDATIONFORLATERREADINGDEVELOPMENTBRACKEN2005DICKINSON2011DICKINSONETAL2003DICKINSONANDPORCHE2011NICHDEARLYCHILDCARERESEARCHNETWORK2005SEVERALSTUDIESHAVEFOUNDTHATYOUNGCHILDREN’SORALLANGUAGESKILLSPREDICTTHEIRREADINGCOMPREHENSIONPERFORMANCELATERINTHEELEMENTARYSCHOOLYEARSCATTSETAL1999MUTERETAL2004STORCHANDWHITEHURST2002THISFINDINGHASLEDSEVERALRESEARCHERSTOINVESTIGATEFACTORSTHATIMPACTYOUNGCHILDREN’SLANGUAGEDEVELOPMENTONEFACTOR,AMONGMANY,DISCOVEREDTOBERELATEDTOCHILDREN’SLANGUAGEDEVELOPMENTISCHILDREN’SCAREGIVERS’ORALLANGUAGEPROFICIENCYDICKINSON2011FARKASANDBERON2004HARTANDRISLEY1995HOFF2003PELLEGRINIANDGALDA1993TUDGEANDROGOFF1989CHILDREN’SLANGUAGEDEVELOPMENTISHIGHLYRELATEDTOCAREGIVERS’ORALLANGUAGEPROFICIENCY,SPECIFICALLYVOCABULARYFARKASANDBERON2004HARTANDRISLEY1995HOFF2003HUTTENLOCHERETAL2010ANDSYNTAXHOFFGINSBERG1998HUTTENLOCHERETAL2002MOSTOFTHESTUDIESABOUTTHERELATIONSHIPBETWEENCAREGIVERS’LANGUAGEINPUTANDCHILDREN’SLANGUAGEDEVELOPMENTWEREBASEDONPARENTS’ANDTHEIRCHILDREN’SLANGUAGEPRESUMABLYBECAUSETHEYWERETARGETINGCHILDRENWHOWERETHREEYEARSOLDORUNDERHOWEVER,LANGUAGEANDVOCABULARYDEVELOPMENTCONTINUETHROUGHOUTEARLYCHILDHOOD,AND635OFCHILDRENINTHEUNITEDSTATESBETWEENTHEAGESOFTHREEANDFIVEWEREENROLLEDINAPRIVATE/PUBLICNURSERYSCHOOLORKINDERGARTEN,ACCORDINGTONATIONALCENTERFOREDUCATIONSTATISTICS’2010DATASNYDERANDDILLOW2011WHEREASWITHPARENTALFACTORSCANACCOUNTFORVARIANCEINCHILDREN’SLANGUAGEDEVELOPMENT,ASTHEYSPENDMORETIMEINOUTOFHOMECHILDCARE,TEACHERFACTORSCANALSOACCOUNTFORVARIANCEINCHILDREN’SLANGUAGEDEVELOPMENTTEACHERSCANPLAYANESPECIALLYIMPORTANTROLEINTHELANGUAGEDEVELOPMENTOFCHILDRENFROMLOWSESFAMILIESWHOARECONSIDEREDATRISKFORLANGUAGEDEVELOPMENTHARTANDATTAINEDINSTORYBOOKREADINGRESEARCH,ASSTORYBOOKREADINGANDPLAYARECOMMONACTIVITIESINPRESCHOOLSETTINGSFORTHISREASON,THEIRQUALITATIVESTUDYINCLUDEDDRAMATICPLAYSUCHASKITCHEN/HOUSEPLAY,RESTAURANTPLAY,ANDLIBRARYPLAYTHELITERATUREPROVIDESTHEORETICALANDEMPIRICALRATIONALESFORTHEIMPORTANCEOFDRAMATICPLAYDURINGTHEPRESCHOOLYEARSMOSTPRESCHOOLCLASSROOMSINCLUDEADRAMATICPLAYCENTERWHERECHILDREN’SDRAMATICPLAYISENCOURAGEDASACONTEXTFORSUPPORTINGCHILDREN’SLEARNINGANDDEVELOPMENTPARTICULARLYDRAMATICPLAY,DISTINCTFROMSOLITARYPLAY,WHICHINVOLVESMORETHANONECHILD,ISKNOWNTOSUPPORTCHILDREN’SLANGUAGEDEVELOPMENTBECAUSECHILDRENCANUSEMOREADVANCEDLANGUAGEINTHEIRDRAMATICPLAYTHANINOTHERACTIVITIESVYGOTSKY1967,ANDTHEYHAVEOPPORTUNITIESTOPRACTICETHELANGUAGETHEYLEARNEDINSOCIETY,INTHEWORLDOUTSIDETHECLASSROOMPELLEGRINIANDGALDA1993ASCHILDREN’SORALLANGUAGEUSEBECOMESMORECOHESIVEINDRAMATICPLAYTHANINOTHERTYPESOFPLAYPELLEGRINIANDGALDA1993,DRAMATICPLAYHASBEENCONSIDEREDTOBEANIMPORTANTCONTEXTFORPRESCHOOLERS’LANGUAGEDEVELOPMENTCHRISTIEANDENZ1992SMILANSKY1968SUGGESTSTHEMAKEBELIEVEELEMENTOFDRAMATICPLAYRELIESHEAVILYUPONSPEECHUSINGFOURFORMSOFVERBALISATIONIDENTIFICATIONOFMAKEBELIEVEROLES,IDENTIFICATIONOFMAKEBELIEVEOBJECTS,SPEECH’SSUBSTITUTIONFORACTION,DESCRIPTIONOFSITUATIONSTHESEVERBALISATIONFORMSAREIMPORTANTTOCOMMUNICATEEACHPLAYER’SIMAGINATIONANDTOMAKETHEPLAYBEHAVIORSMOREUNDERSTANDABLEAMONGPLAYERSSMILANSKY1968ALSOSUGGESTSTHATSPEECHINCLUDINGEXPLANATIONS,DISCUSSIONS,ANDCOMMANDSFORPLAYPROGRESSIONFROMPLANNINGTODEVELOPINGANDTOMAINTAININGTHEPLAYISCRUCIALINDRAMATICPLAYTHEREFORE,DRAMATICPLAYENCOURAGESCHILDREN’SLANGUAGEPRACTICEGARVEY1974SOMEPLAYRESEARCHERSSHEDLIGHTONMETALEVELCOMMUNICATIONWITHINCHILDREN’SPLAYCONVERSATIONINGARVEY’SGARVEY1974STUDY,SHECATEGORIZEDTWOMODESOFVERBALEXCHANGESOBSERVEDINCHILDREN’SDRAMATICPLAYPRETENDCOMMUNICATIONSANDMETACOMMUNICATIONSFORPRETENDCOMMUNICATIONS,CHILDRENAREACTINGTHEROLESWITHINTHEPRETENDPLAYFRAMECHILDRENDISCUSSTHEDETAILSOFTHEPRETENDPLAYATTHEMETALEVELOFPRETENDPLAYATTHEMETACOMMUNICATIONSMODE,CHILDRENASSIGNORCHANGEPRETENDROLES,DISCUSSAPPROPRIATEACTIONS,USESPEECHFORTHEROLESORIDENTI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簡(jiǎn)介：基于基于VHDL語言的語言的8路搶答器設(shè)計(jì)路搶答器設(shè)計(jì)摘要本課程設(shè)計(jì)分為主體電路和擴(kuò)展電路兩部分共同實(shí)現(xiàn)搶答器的鎖存、顯示與報(bào)警功能。在本次設(shè)計(jì)中，系統(tǒng)開發(fā)平臺(tái)為MAXPLUSⅡ，硬件描述語言是VHDL。競(jìng)賽者可以分為8組，搶答時(shí)各組對(duì)主持人提出的問題要在最短的時(shí)間內(nèi)做出判斷，并按下?lián)尨鸢存I回答問題。當(dāng)?shù)谝粋€(gè)人按下按鍵后，則在顯示器上顯示該組的號(hào)碼，對(duì)應(yīng)的燈亮，同時(shí)電路將其他各組按鍵封鎖，使其不起作用。若搶答時(shí)間內(nèi)無人搶答，則報(bào)警燈亮。回答完問題后，由主持人將所有按鍵恢復(fù)，重新開始下一輪搶答。并且依據(jù)設(shè)計(jì)方案和設(shè)計(jì)平臺(tái)完成了程序編寫和程序調(diào)試，通過運(yùn)行程序及時(shí)序波形的仿真有效驗(yàn)證了設(shè)計(jì)的正確性，初步實(shí)現(xiàn)了設(shè)計(jì)目標(biāo)。關(guān)鍵詞鎖存、顯示；搶答器；MAXPLUSⅡ；VHDL。ABSTRACTTHISCOURSEDESIGNISDIVIDEDINTOTWOMAINCIRCUITANDEXPANSIONCIRCUITREALIZEDPARTLYJOINTINVERTERLATCHRESPONDER,DISPLAYANDALARMFUNCTIONINTHISDESIGN,SYSTEMDEVELOPINGPLATFORMFORMAXPLUSⅡ,HARDWAREDESCRIPTIONLANGUAGEISVHDLCOMPETITORSMAYBEDIVIDEDINTOEIGHTGROUPS,VIESTOANSWERFIRSTWHENEACHTOTHEHOSTPUTSFORWARDTHEPROBLEMSINTHESHORTESTPOSSIBLETIMETOMAKEJUDGMENTS,ANDPRESSTHEBUTTONSVIESTOANSWERTHEQUESTIONWHENTHEFIRSTMANPRESSBUTTONS,THENONSCREENDISPLAYSUPERVISORNUMBER,THECORRESPONDINGLIGHTS,ANDOTHERGROUPSCIRCUITWILLBUTTONSBLOCKADE,MAKEITDOESNTWORKIFRESPONDERTIMENOCONTEST,THEALARMLIGHTANSWERSQUESTIONS,BYAHOSTWILLRESTOREALLKEYSANDSTARTAGAINNEXTCONTESTANDACCORDINGTOTHEDESIGNSCHEMEANDDESIGNPLATFORMCOMPLETEDPROGRAMMINGANDPROGRAMTEST,THROUGHTORUNTHEPROGRAMINTIMESEQUENCEWAVEFORMSIMULATIONVERIFIEDEFFECTIVELYTHECORRECTNESSOFDESIGN,ANDTHENREALIZEDTHEDESIGNGOALKEYWORDSLATCH,DISPLAY,SCAREANSWERINGMANOMETERSMAXPLUSⅡVHDL基于VHDL語言的8路搶答器設(shè)計(jì)第1頁共29頁1引言隨著科學(xué)技術(shù)的不斷發(fā)展，促使人們學(xué)科學(xué)、學(xué)技術(shù)、學(xué)知識(shí)的手段多種多樣。搶答器作為一種工具，已廣泛應(yīng)用于各種競(jìng)賽場(chǎng)合。本課程設(shè)計(jì)以8路搶答器為理念，實(shí)現(xiàn)優(yōu)先搶答、判決、鎖存及數(shù)碼管顯示等功能。在本次計(jì)中，系統(tǒng)開發(fā)平臺(tái)為MAXPLUSⅡ2。MAXPLUSⅡ是ALTERA公司提供的FPGA/CPLD開發(fā)集成環(huán)境，ALTERA是世界上最大可編程邏輯器件的供應(yīng)商之一。MAXPLUSⅡ界面友好，使用便捷，被譽(yù)為業(yè)界最易用易學(xué)的EDA軟件。在MAXPLUSⅡ上可以完成設(shè)計(jì)輸入、元件適配、時(shí)序仿真和功能仿真、編程下載整個(gè)流程，它提供了一種與結(jié)構(gòu)無關(guān)的設(shè)計(jì)環(huán)境，是設(shè)計(jì)者能方便地進(jìn)行設(shè)計(jì)輸入、快速處理和器件編程。在本次設(shè)計(jì)中，采用的硬件描述語言是VHDL1（VERYHIGHSPEEDINTEGRATEDCIRCUITHARDWAREDESCRIPTIONLANGUAGE）。VHDL語言是一種用于電路設(shè)計(jì)的高級(jí)語言。VHDL主要用于描述數(shù)字系統(tǒng)的結(jié)構(gòu)、行為、功能和接口。除了含有許多具有硬件特征的語句外，VHDL的語言形式、描述風(fēng)格以及語法是十分類似于一般的計(jì)算機(jī)高級(jí)語言。11課程設(shè)計(jì)目的課程設(shè)計(jì)目的學(xué)習(xí)ALTERA公司的FPGA/CPLD的結(jié)構(gòu)、特點(diǎn)和性能。學(xué)習(xí)集成開發(fā)軟件MAXPLUSII/QUARTUSII的使用及設(shè)計(jì)過程。熟悉EDA工具設(shè)計(jì)數(shù)字電路設(shè)計(jì)方法，掌握VHDL硬件描述語言設(shè)計(jì)方法。根據(jù)給定題目設(shè)計(jì)數(shù)字電路，來加深對(duì)可編程邏輯器件的理解和掌握。12課程設(shè)計(jì)具體要求及功能課程設(shè)計(jì)具體要求及功能在所選擇器件內(nèi)完成八路搶答器的設(shè)計(jì)，要求設(shè)計(jì)完成后芯片具有搶答器的全部功能、包括顯示和操作接口。搶答器要求有八路搶答輸入，搶答邏輯設(shè)計(jì)合理（具有搶答鎖定），搶答編號(hào)顯示，搶答成功指示，搶答完成后狀態(tài)復(fù)位。在相應(yīng)的器件平臺(tái)上完成設(shè)計(jì)的輸入、編譯、綜合或適配通過。8路搶答器控制系統(tǒng)是娛樂活動(dòng)中經(jīng)常使用的重要基礎(chǔ)設(shè)備之一，根據(jù)搶答要求，系統(tǒng)所需實(shí)現(xiàn)的功能如下1主持人按鍵清零，數(shù)碼顯示0，蜂鳴器不叫，進(jìn)入搶答狀態(tài)。2主持人發(fā)出開始命令，8人開始搶答。其中一人先按下?lián)尨疰I，蜂鳴器發(fā)出鳴叫，數(shù)碼顯示該人號(hào)碼，其他人再按鍵，系統(tǒng)不再響應(yīng)，直至主持人按鍵清零，下一次搶答開始。

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簡(jiǎn)介：I摘要摘要隨著社會(huì)的不斷發(fā)展，經(jīng)濟(jì)制度在不斷建立與完善，財(cái)政工作不僅面臨著機(jī)遇，而且也面臨著重大的挑戰(zhàn)。這主要體現(xiàn)在一方面國(guó)家宏觀經(jīng)濟(jì)調(diào)控需要財(cái)政職能的履行，另一方面，當(dāng)下經(jīng)濟(jì)發(fā)展迅速，目前的一些財(cái)政工作已經(jīng)難以再滿足其發(fā)展需求。因此，政府更加期望通過財(cái)政工作的預(yù)見性來輔助相關(guān)財(cái)政政策的制定實(shí)施，因此，財(cái)政收入預(yù)測(cè)是當(dāng)前社會(huì)一個(gè)迫切需要的研究課題。本文選取了1999年到2013年的財(cái)政數(shù)據(jù)，包括財(cái)政收入表和四種稅收表，數(shù)據(jù)主要來源于廣州市統(tǒng)計(jì)局的統(tǒng)計(jì)年鑒與泰迪智能科技有限公司。本文旨在分析財(cái)政收入的影響因素及預(yù)測(cè)情況。在研究財(cái)政收入影響因素之前，首先分析了四種稅收的主要影響因素，因?yàn)槎愂赵谪?cái)政收入中所占比重很大，并且稅收與地方財(cái)政收入政策的制定息息相關(guān)，因此本文細(xì)化了稅收因素的分析，主要運(yùn)用SAS軟件，通過典型相關(guān)分析模型分別找到了影響四種稅收的主要因素，另外也分別找出了影響全市稅收的主要區(qū)域。稅收的細(xì)分研究，看似與文章脫節(jié)，實(shí)際上為廣州市制定相應(yīng)稅收的政策都提供了一定的理論依據(jù)。接著進(jìn)行了本文的研究重點(diǎn)，即關(guān)于財(cái)政收入的預(yù)測(cè)，首先運(yùn)用SAS軟件通過主成分分析，成功將財(cái)政收入的17個(gè)指標(biāo)降維，篩選出10個(gè)主要影響財(cái)政收入的指標(biāo)。最后，運(yùn)用MATLAB軟件，通過BP神經(jīng)網(wǎng)絡(luò)55進(jìn)行了預(yù)測(cè)，得到了2014與2015年的財(cái)政收入的預(yù)測(cè)值，并且與真實(shí)值對(duì)比，發(fā)現(xiàn)預(yù)測(cè)結(jié)果與真實(shí)值并不是相差很大。本文成功的建立了財(cái)政收入的預(yù)測(cè)模型，為廣州市制定相應(yīng)的財(cái)政政策都提供了一定的理論依據(jù)。關(guān)鍵詞關(guān)鍵詞財(cái)政預(yù)測(cè)典型相關(guān)主成分分析BP神經(jīng)網(wǎng)絡(luò)§1緒論1目錄目錄摘要IABSTRACTII目錄1§1緒論211研究背景及意義212研究問題概述313研究思路和行文框架3§2稅收的相關(guān)分析521數(shù)據(jù)的準(zhǔn)備522數(shù)據(jù)預(yù)處理524稅收相關(guān)關(guān)系的求解與結(jié)果分析1025本章總結(jié)17§3財(cái)政收入的主要因素分析1831數(shù)據(jù)準(zhǔn)備1832主成分分析模型的建立1833財(cái)政收入主要因素的求解與結(jié)果分析1933本章總結(jié)22§4BP神經(jīng)網(wǎng)絡(luò)預(yù)測(cè)財(cái)政收入2341數(shù)據(jù)準(zhǔn)備2342BP神經(jīng)網(wǎng)絡(luò)模型建立2343財(cái)政收入預(yù)測(cè)的求解與結(jié)果分析2644本章總結(jié)29§5研究結(jié)論30參考文獻(xiàn)31致謝32

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簡(jiǎn)介：英文原文英文原文JAVAISASIMPLE,OBJECTORIENTED,DISTRIBUTED,INTERPRETED,ROBUSTSECURITY,STRUCTURENEUTRAL,PORTABLE,HIGHPERFORMANCE,MULTITHREADEDDYNAMICLANGUAGETHEMAINADVANTAGEOFJAVALANGUAGE,JAVAAPPLICATIONSACROSSHARDWAREPLATFORMSANDOPERATINGSYSTEMSFORTRANSPLANTTHISISBECAUSETHEJVMISINSTALLEDONEACHPLATFORMCANUNDERSTANDTHESAMEBYTECODEJAVALANGUAGEANDPLATFORMSCALABILITYISVERYSTRONGATTHELOWEND,JAVALANGUAGEISTHEFIRSTOPENSTANDARDSTECHNOLOGYSUPPORTENTERPRISEONE,SUPPORTTHEUSEOFXMLANDWEBSERVICECANNOTSTRIDEBUSINESSLINESTOSHAREINFORMATIONANDAPPLICATIONSCHENGXUTHEREARETHREEVERSIONSOFJAVAPLATFORM,WHICHMAKESSOFTWAREDEVELOPERS,SERVICEPROVIDERSANDEQUIPMENTMANUFACTURERSCANTARGETSPECIFICMARKETDEVELOPMENT1JAVASEFORMAPPLICATIONSJAVASEINCLUDESSUPPORTFORJAVAWEBSERVICESDEVELOPMENTCLASSES,ANDFORTHEJAVAPLATFORM,ENTERPRISEEDITIONJAVAEETOPROVIDEABASISMOSTJAVADEVELOPERSUSEJAVASE5,ALSOKNOWNASJAVA50OR“TIGER“2JAVAEEFORMERLYKNOWNASJ2EEENTERPRISEEDITIONTOHELPDEVELOPANDDEPLOYPORTABLE,ROBUST,SCALABLEANDSECURESERVERSIDEJAVAAPPLICATIONSJAVASEJAVAEEISBUILTONTHEFOUNDATION,WHICHPROVIDESWEBSERVICES,COMPONENTMODEL,MANAGEMENTANDCOMMUNICATIONAPI,CANBEUSEDTOACHIEVEENTERPRISECLASSSERVICEORIENTEDARCHITECTUREANDWEB20APPLICATIONS3JAVAMEFORMERLYKNOWNASJ2MEJAVAMEDEVICESINMOBILEANDEMBEDDEDAPPLICATIONSRUNNINGONAROBUSTANDFLEXIBLEENVIRONMENTJAVAMEINCLUDESFLEXIBLEUSERINTERFACES,ROBUSTSECURITYMODEL,ANDMANYBUILTINNETWORKPROTOCOLSANDNETWORKINGTHATCANBEDYNAMICALLYDOWNLOADEDANDEXTENSIVESUPPORTFOROFFLINEAPPLICATIONSJAVAMEBASEDAPPLICATIONSPECIFICATIONONLYWRITEONCEANDCANBEUSEDINMANYDEVICESANDCANUSETHENATIVEFEATURESOFEACHDEVICEJAVALANGUAGEISSIMPLEJAVALANGUAGESYNTAXANDTHECLANGUAGEANDCLANGUAGEISVERYCLOSE,JAVADISCARDEDTHEC,RARELYUSED,HARDTOUNDERSTANDTHECHARACTERISTICS,SUCHASOPERATOROVERLOADING,MULTIPLEINHERITANCE,THEMANDATORYAUTOMATICTYPECONVERSIONJAVALANGUAGEDOESNOTUSEPOINTERS,ANDPROVIDESAUTOMATEDWASTECOLLECTIONJAVAISANOBJECTORIENTEDLANGUAGEJAVALANGUAGEPROVIDESCLASSES,INTERFACESANDINHERITANCEOFTHEORIGINALLANGUAGE,FORSIMPLICITY,ONLYSUPPORTSSINGLEINHERITANCEBETWEENCLASSES,BUTSUPPORTMULTIPLEINHERITANCEBETWEENINTERFACESANDSUPPORTCLASSESANDINTERFACESTOACHIEVEBETWEENTHEMECHANISMKEYWORDIMPLEMENTSJAVALANGUAGEFULLYSUPPORTSDYNAMICBINDING,ANDCLANGUAGEUSEDONLYFORDYNAMICBINDINGOFVIRTUALFUNCTIONSINSHORT,JAVALANGUAGEISAPUREOBJECTORIENTEDPROGRAMMINGLANGUAGEJAVALANGUAGEISDISTRIBUTEDJAVALANGUAGESUPPORTFORINTERNETAPPLICATIONDEVELOPMENT,JAVASRMIREMOTEMETHODACTIVATIONMECHANISMISALSOANIMPORTANTMEANSOFDEVELOPINGDISTRIBUTEDAPPLICATIONSJAVALANGUAGEISROBUSTJAVASSTRONGTYPESYSTEM,EXCEPTIONHANDLING,AUTOMATEDWASTECOLLECTIONISANIMPORTANTGUARANTEEROBUSTJAVAPROGRAMSJAVALANGUAGEISSAFEJAVAISOFTENUSEDINNETWORKENVIRONMENT,THIS,JAVAPROVIDESASECURITYMECHANISMTOPREVENTMALICIOUSCODEATTACKSHIBERNATESECONDAGAINSTTHECONDITIONSOFTHEQUERYCACHEHIBERNATEOBJECTRELATIONALMAPPINGFORTHEDELAYANDNONDELAYOBJECTINITIALIZATIONNONLAZYWHENREADINGANOBJECTANDTHEOBJECTWILLBEALLREADOUTTOGETHERWITHOTHEROBJECTSTHISSOMETIMESRESULTSINHUNDREDSIFNOTTHOUSANDSOFWORDSSELECTSTATEMENTWHENREADINGTHEOBJECTIMPLEMENTATIONTHISPROBLEMSOMETIMESOCCURSWHENUSINGTHETWOWAYRELATIONSHIP,OFTENLEADINGTOTHEDATABASESTOBEREADDURINGTHEINITIALIZATIONPHASEOUTOFCOURSE,YOUCANTAKETHETROUBLETOEXAMINEEACHOBJECTANDOTHEROBJECTSOFGUANXI,ANDTOTHEMOSTEXPENSIVEOFTHESHANCHU,BUTINTHELAST,WEMAYTHEREFORELOSELEORMTOOLTHISXIANGZAIOBTAINEDBIANLIACACHEANDSECONDARYCACHEOFCOMPARISONTHEFIRSTLEVELCACHESECONDLEVELCACHEDATASTOREDINTHEFORMOFINTERRELATEDPERSISTENTOBJECTSTHEOBJECTOFBULKDATACACHERANGEOFTHESCOPEOFSERVICES,EACHTRANSACTIONHASASEPARATEFIRSTLEVELCACHEPROCESSRANGEORSCOPEOFTHECLUSTER,THECACHEISTHESAMEPROCESSORCLUSTERTOSHAREONALLMATTERSWITHINTHECONCURRENTACCESSPOLICIESBECAUSEEACHTRANSACTIONHASASEPARATEFIRSTLEVELCACHE,CONCURRENCYPROBLEMDOESNOTOCCURWITHOUTTHENEEDTOPROVIDECONCURRENTACCESSPOLICYWILLBEANUMBEROFMATTERSSIMULTANEOUSACCESSTOTHESAMESECONDLEVELCACHEDATA,ITISNECESSARYTOPROVIDEAPPROPRIATECONCURRENTACCESSPOLICIES,TOENSURETHATAPARTICULARTRANSACTIONISOLATIONLEVELDATAEXPIRATIONPOLICIESDIDNOTPROVIDEDATAEXPIRATIONPOLICIESOBJECTINACACHEWILLNEVEREXPIRE,UNLESSTHEAPPLICATIONEXPLICITLYCLEARTHECACHEORCLEARASPECIFICOBJECTMUSTPROVIDEDATAEXPIRATIONPOLICIES,SUCHASMEMORYCACHEBASEDONTHEMAXIMUMNUMBEROFOBJECTS,ALLOWINGOBJECTSINTHECACHEOFTHEMOSTALONGTIME,ANDALLOWINGTHEOBJECTINTHECACHETHELONGESTIDLETIMEOFPHYSICALMEMORYANDHARDDISKMEMORYSTORAGEMEDIUMFIRSTOFALLBULKDATAOBJECTSSTOREDINTHEMEMORYBASEDCACHE,WHENTHENUMBEROFOBJECTSINMEMORYTODATAEXPIRATIONPOLICYSPECIFIEDLIMIT,THEREMAININGOBJECTSWILLBEWRITTENONTHEHARDDISKCACHECACHINGSOFTWAREIMPLEMENTATIONOFTHEHIBERNATESESSIONISINCLUDEDINTHEREALIZATIONOFTHECACHEPROVIDEDBYTHIRDPARTIES,HIBERNATEPROVIDESONLYACACHEADAPTERCACHEPROVIDERUSEDTOPLUGINTOAPARTICULARCACHEINHIBERNATEWAYCACHEENABLEDAPPLICATIONSBYASLONGASTHESESSIONINTERFACEIMPLEMENTATIONSAVE,UPDATE,DELETE,DATALOADINGANDQUERYTHEDATABASEOPERATIONS,HIBERNATEWILLENABLEFIRSTLEVELCACHE,THEDATAINTHEDATABASEINTHEFORMOFANOBJECTCOPIEDTOTHECACHEFORBATCHUPDATESANDBULKDELETEOPERATIONS,IFYOUDONOTWANTTOENABLEFIRSTLEVELCACHE,YOUCANBYPASSTHEHIBERNATEAPI,JDBCAPIDIRECTLYTOPERFORMTHATOPERATIONUSERSCANTYPEINASINGLECLASSORASINGLESETOFSECONDLEVELCACHESIZEONTHECONFIGURATIONIFTHEINSTANCEOFTHECLASSAREFREQUENTLYREADBUTRARELYMODIFIED,YOUCANCONSIDERUSINGASECONDLEVELCACHEONLYFORACLASSORSETOFSECONDLEVELCACHEISCONFIGURED,HIBERNATEWILLRUNWHENANINSTANCEOFITTOTHESECONDLEVELCACHEUSERMANAGEMENTMEANSTHEFIRSTLEVELCACHEOFPHYSICALMEDIAFORTHEMEMORYCACHE,BECAUSETHEMEMORYCAPACITYISLIMITED,MUSTPASSTHEAPPROPRIATESEARCHSTRATEGIESANDRETRIEVALMETHODSTOLIMITTHENUMBEROFOBJECTSLOADEDSESSIONOFTHEEVITMETHODCANEXPLICITLYCLEARTHECACHEASPECIFICOBJECT,BUTTHISMETHODISNOTRECOMMENDEDSECONDLEVELCACHEMEMORYANDTHEPHYSICALMEDIACANBEAHARDDISK,SOTHESECOND

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