资源描述：
《基于数据库的自然语言查询技术与实现》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、西安电子科技大学硕士学位论文基于数据库的自然语言查询技术与实现姓名：杨伟申请学位级别：硕士专业：计算机应用技术指导教师：刘志镜20100101㾷ᮠᦞᓃᢰᵟᰕ䎻ᡀ⟏ˈᐢᓄ⭘Ҿ㹼ъˈնӵ䲀Ҿާᴹуъ⸕䇶ⲴӪઈDŽ㠚❦䈝䀰Ѫؑ㺘䗮Ⲵѫ㾱ᯩᔿˈоᮠᦞᓃḕ䈒ᢰᵟ㔃ਸ൘а䎧ˈᗇ䎺ᶕ䎺ཊⲴ䶎уъ⭘ᡧ㜭ཏԕа⿽᱃ҾᦼᨑⲴᯩ⌅৫䇯䰞ᡰ䴰ؑˈާᴹ䟽བྷⲴ⨶䇪৺ᇎ⭘ԧ٬DŽᵜ䇪᮷ᰘ൘⹄ウสҾᮠᦞᓃⲴ㠚❦䈝䀰ḕ䈒ᢰᵟDŽ俆ӻ㓽Ҷᮠᦞᓃ㠚❦䈝䀰ḕ䈒Ⲵ䈝ਕ⢩⛩˖ㅖਸ⢩ᇊ᮷⌅㿴ࡉǃާᴹаᇊ㿴ᖻਟᗚˈഐ↔ާᴹਟᇎ⧠ᙗDŽ᧕⵰⹄ウҶสҾ䳀傜ቄ、ཛ⁑ර(HMM)Ⲵ䇽ᙗḷ⌘ԕ৺䀂㢢ḷ
2、⌘⌅ሩભᇎփⲴ䇶࡛ㅹ⨶䇪઼㇇⌅ˈ⭡↔ᗇ䈝ਕ࠷࠶ᴤ࣐㋮⺞DŽ⸕䇶ᓃⲴ䇮䇑൘㌫㔏ᔪ䇮ѝᗵнਟቁˈᵜ㌫㔏ᶴᔪҶн਼㊫࡛Ⲵ⸕䇶ᓃˈᆳԜᱟ䇽⌅ǃਕ⌅࠶᷀ⲴสDŽ䇽⌅࠶᷀ᱟ≹䈝༴⨶Ⲵᗵ㓿↕僔ˈᵜ᮷䟷⭘Ҷৼੁᴰབྷ३䝽⌅䘋㹼࠶䇽༴⨶ˈᒦ൘аᇊ〻ᓖк⎸䲔Ҷ↗ѹDŽሩҾᵚⲫᖅ䇽Ⲵ䇶࡛ˈ㌫㔏ҏڊҶᓄ༴⨶DŽ㔃ਸᮠᦞᓃḕ䈒䈝ਕⲴ⢩⛩ˈ䈖㓶䇘䇪Ҷḕ䈒ⴞḷ઼ḕ䈒ᶑԦⲴ䇶࡛䗷〻ˈ㘳㲁ࡠᲞ䙊ӪઈⲴḕ䈒㾱≲ˈᵜ᮷ሩн਼㊫࡛ⴞḷ⸝䈝৺ཊ⿽㊫රⲴᶑԦ⸝䈝Ҷ␡ޕ⹄ウDŽ㔬ਸࡽ䶒䇘䇪Ⲵ亩⸕䇶઼ᢰᵟˈṩᦞ䈮仈㾱≲䇮䇑Ҷањ㠚❦䈝䀰ḕ䈒㌫㔏ˈᒦᡀ࣏ᓄ⭘൘⽮४ӪһẓṸᓃ઼࡙ᆹޜਨъ࣑ؑᓃḕ䈒ѝˈ䗮
3、ࡠҶ亴ᵏ᭸᷌DŽᴰਾ䇴䘠Ҷሩᵜ㌫㔏Ⲵн䏣ԕ৺ਾᵏᡰ㾱㔗㔝᭩䘋ⲴൠᯩDŽީ䭤䈃φ㠠❬䈣䀶༺⨼䈃⌋࠼᷆ਛ⌋࠼᷆⸛䇼ᓉAbstractDatabasetechnologybecomesincreasinglysophisticated,andhasbeenappliedtoallwalksoflife,butitonlyallowsprofessionaltooperate.Naturallanguage,asamajormodeofinformationexpression,combinedwithdatabaseinformationquery,hasgre
4、attheoreticalandpracticalvalue,whichmakesmoreandmorelaypeopleusetheconvenientmethodtoaccesstheinformationneeded.Thepurposeofthispaperistoresearchnaturallanguagequerytechnologybasedondatabase.Firstlyweintroducethefeaturesofnaturallanguagequeryinterfaceondatabase:thequerystatement
5、withcertainlawstofollowmeetsspecificgrammarrules,soitisachievable,andthenpartofspeechtaggingbasedonHMM,namedentityrecognitionmethodbasedonroletaggingandotherrelatedtheoriesarediscussed,whichmakeswordsegmentationmoreaccurate.Thedesignofrepositoryisofgreatessential,anddifferenttyp
6、esofrepositoryarethebasisofthelexicalandsyntacticanalysis.Chinesewordsegmentationisanecessarystepinprocessing,weadoptatwo-waymaximummatchingmethodtoprocessthechineseword,andeliminateambiguitytosomeextent.Forsomeunknownword,thesystemhasdoneaccordingly.Nextwediscussthesyntacticana
7、lysiscombinedwiththefeaturesofquerystatement,mainlyaboutthequerytargetandcondition,thetargetwordhasavarietyofcircumstances,thispaperhasmadeadetaileddiscussion.Consideringthequeriesofgeneralpeople,weresearchdifferenttypesoftargetphrasesandvarioustypesofconditionsindepth.ANaturalL
8、anguageQuerySystemisdesignedandimplementedinthe
