高瓜氨醯氨基腺苷是一個化學產品。
基本介紹
- 中文名：高瓜氨醯氨基腺苷
- 外文名：Thisarticleprovidesadetailedoverviewof
- 核心：高瓜氨醯氨
- 所屬：科技
ThisarticleprovidesadetailedoverviewofWikipedia'ssearchfeature(intheupperleftcornerofaWikipediawindow.)(ThereisalsoaspecialSearchbox,whichiscustomizabletosearchinoneormoredesirednamespaces.)Italsoincludesinstructionsonusingexternalsearchengines,suchasGoogle,tofindinformation.ForashortintroductiontosearchingWikipedia,seeLookitup.
contents:1Wikipediasearch2Externalsearchengines3Browser-specifichelp4SearchingwithTomeRaider5UsingWikimediasearchtofindcategoryintersections6IfyoucannotfindanappropriatepageonWikipedia7Seealso
WikipediasearchHelpWikipediaAbout(overview)SearchEditingFAQHelpNavigationContentsPortalsCategoriesFeaturedcontentA-ZindexPoliciesandguidelinesNeutralpointofviewVerifiabilityNooriginalresearchCitingsourcesWhatWikipediaisnotExternallinks
Typeyourkeywordsintheboxtotheleftunder"search"andthenclick:
-(orEnteronkeyboard)takesyoutothearticle.-returnsalistofarticlesandadditionalsearchoptions.
TipsforeffectivesearchesFornow,asummaryofthenewfeatures(fromthemailinglistpostlinkedabove)are:
(1)Didyoumean?-dependingontheresultsofasearch,somecontext-sensitivesearchsuggestionsarealsoprovided,includingsuggestionsfordifferentspellings.(2)Fuzzyandwildcardqueries-awordcanbemadefuzzybyadding~toit'send,e.g.querysarah~thompson~willgivealldifferentspellingsandsimilarnamestosarahthompson.Wildcardscannowbeprefixandsuffix,e.g.*stanwillgivevariouscountriesinCentralAsia.(3)prefix:-usingthiscolon-definedsearchparameter,queriescanbelimitedtopagesbeginningwithcertainprefix.E.g.mwsuggestprefix:Wikipedia:VillagePumpwillsearchallvillagepumpsandarchivesformwsuggest.Thisshouldbeespeciallyusefulforarchivesearchinginconcertwithinputboxorsearchbox(4)intitle:-usingthiscolon-definedsearchparameter,queriescanbelimitedtotitlesonly,forexampleintitle:BLPprefix:Wikipedia:(notetheneedforthetrailingcolon)findallWikipedianamespacepageswith"blp"inthetitle.(5)Improvedquality-generalimprovedqualityofsearchresultsviausageofrelatedarticles(basedonco-occurrenceoflinks),anchortext,textabstracts,proximitywithinarticles,sections,redirects,improvedstemmingandsuch.PhrasesindoublequotesAphrasecanbefoundbyenclosingitindoublequotes.Forexample,"hollydolly"returnssixmatches;hollydolly(twostandalonewords)returns197.
GoiscasesensitiveMainarticle:Help:GobuttonThe"go"functionusesanalgorithmtodecidewhatpageyou'relikelytobeinterestedin,andthisusuallymasksitscasesensitivity–butnotalways.
AvoidshortandcommonwordsIfyoursearchtermsincludeacommonstopword(suchasthe,your,more,right,while,when,who,which,such,every,about),youmayseemanyirrelevantresults.Previously,Wikipedia'ssearchfunctioncouldnotsearchforsuchwords.SinceFebruary2006,Wikipedia'sLuceneindexdoesnotfilteroutstopwords,soanywordcanbeprocessedinsearchqueries.
WildcardsandBooleansearchingWikipedia'ssearchfeatureusesBooleanfulltextsearch.Pleaseexerciseself-restraintwhenusingwildcardcharacters,astheytakeatollontheserver.SeeBooleanfulltextsearchfordetailsontheiruse.
WordswithspecialcharactersMainarticle:Wikipedia:SpecialcharactersInasearchforawordwithadiaeresis,suchasSintOdiliënberg,itdependswhetherthisëisstoredasonecharacteroras"ë".InthefirstcaseonecansimplysearchforOdilienberg(orOdiliënberg);inthesecondcaseitcanonlybefoundbysearchingforOdili,eumland/ornberg.Thisisactuallyabugthatshouldbefixed–theentitiesshouldbefoldedintotheirrawcharacterequivalentssoallsearchesonthemareequivalent.
WordsinsinglequotesIfawordappearsinanarticlewithsinglequotes,youcanonlyfinditifyousearchforthewordwithquotes.Sincethisisrarelydesirable,itisbettertousedoublequotesinarticlesforwhichthisproblemdoesnotarise.Seethemanualofstyleformoreinfo.
Anapostropheisidenticaltoasinglequote,thereforethenameMu'ammarcanbefoundonlybysearchingforexactlythat(andnototherwise).Awordwith'sisanexceptioninthatitcanbefoundalsobysearchingforthewordwithouttheapostropheandthes.
NamespacesThesearchonlyappliestothenamespacesselectedintheuser'spreferences.
Tosearchinaparticularnamespace,insertitsprefixwithacolon,forexampletemplate:checkmarkwillsearchfor"checkmark"intemplatenamespace.Useall:prefixtosearchinallnamespaces.
Tosearchinanysubsetofnamespaces,usetheadvancedsearchform,whichappearsatthebottomofasearchresultspage,ifasearchisunsuccessful.Dependingonthewebbrowserinuse,aboxmaystillbecheckedfromaprevioussearch,butwithoutbeingeffectiveanylonger!Tomakesure,uncheckandthenrecheckit.
Searchingtheimagenamespacemeanssearchingtheimagedescriptions,i.e.thefirstpartsoftheimagedescriptionpages.
ThesourcetextissearchedThesourcetext(whatoneseesintheeditbox,alsocalledwikitext)issearched.Thisdistinctionisrelevantforpipedlinks,forinterlanguagelinks(tofindlinkstoChinesearticles,searchforzh,notforZhongwen),specialcharacters(ifêiscodedasêitisfoundsearchingforecirc),etc.
DelayinupdatingthesearchindexForreasonsofefficiencyandpriority,veryrecentchangesarenotalwaysimmediatelytakenintoaccountinsearches.
Multi-lingualWikipediasearchYoucandoamulti-lingualWikipediasearchusingGoogleAdvancedSearchorenteringsite:wikipedia.orgintheGooglesearchbox.Lumrix:AJAXdrivenWikipediasearchengine.SupportsotherlanguagessuchasGerman,Spanish,orFrench.QwikahasindexesforEnglish,German,French,Japanese,Italian,Dutch,Portuguese,Spanish,Greek,Korean,Chinese,andRussianwheretheoriginalcontentiscombinedwithmachinetranslatedcontentfrom/toEnglish.DefinitionsIfyou'relookingforastraightdefinition,tryoursisterprojectWiktionary.FordefinitionsoftermsusedinWikipedia,checkouttheglossaryorthetutorial'sglossary.
SearchingforexternallinksSpecial:LinksearchisatoolforsearchingforlinksfromWikipediaarticlestositesoutsideWikipedia.Forexample,allWikipediapageslinkingtoYahoo.com.
DisplayofsearchresultsLoggedinuserscanchoosehowmuchcontextandhowmanyhitsperpagetodisplaywithaparameterin"MyPreferences".
ExternalsearchenginesVarioussearchenginescanprovidedomain-specificsearches,whichletyousearchWikipediaspecifically.Searchesarebasedonthetextasshownbythebrowser,sowikimarkupisirrelevant.Dependingonyourbrowser,youmayalsobeabletousetoolsthatallowyoutosearchWikipediausingbookmarklets.
Ingeneral,externalsearchenginesarefasterthanaWikipediasearch.However,becausethesearchengine'scacheisbasedonwhenthesitewasindexed,thesearchmaynotreturnnewlycreatedpages.Similarly,thesearchengine'scachedversionofthepagewillnotbeasup-to-dateasthelinktoWikipediaitself.Also,whenreturningWikipediaarticlesinaregularsearch,mirrorsandforksofWikipediacontentfrequentlyrankhigherthantheactualWikipediaarticlesbecauseofsearchengineoptimizationtechniques.
TheseissuesmaybelessofaproblemwhenusingcertainsearchenginesthatprocessWikipediadifferently:
GoogletendstoincludeWikipediaaspartofitsnormalsearch,anditcomesupfairlyaccurately.Yahoo!includesWikipediaaspartofitscontentacquisitionprogramandgetsaregulardatafeed.Clustydownloadsandprocessesthedatabaseregularly,generatingautomaticabstractsandimagethumbnailsandmeaningfullyparsingredirects,disambiguations,andcategories.Qwikaonlyindexeswikis,andthusmirrorsdonotappearintheirresults.Wikimedia-SearchWikimedia-Searchwithsuggest-functionandforallprojects.ClustyByfollowingthelinkbelow,youcanusetheClustysearchenginetosearchandclusterWikipediainEnglishonly.
SearchandClusterEnglishWikipediawithClustyIfyoufrequentlysearchviaClusty,considerinstallingtheClustyToolbar(beta).Selectingthe"Encyclopedia"searchsourceallowsyoutoquicklysearchtheEnglishversionofWikipedia.TheClustyToolbarisavailableforWindowswithInternetExplorerandMozillaFirefox(beta).
FutefFUTEFisasite,currentlyinbeta,limitedtoWikipediacontent.Besidesbasickeywordandfulltextsearchprovidingalistofrelevantarticles,italsolistsrelatedcategoriesinasidebar.
SearchWikipediawithFutef
