[Data.for.the.Public.Good(2012.2)].Alex.Howard.文字版

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1、DataforthePublicGoodHowDataCanHelpCitizensandGovernmentAlexHowardCLOUDMEETSBIGDATAEMC2,EMC,andtheEMClogoareregisteredtrademarksortrademarksofEMCCorporationintheUnitedStatesandothercountries.©Copyright2012EMCCorporation.Allrightsreserved.68837JoinusatStrataNewYorkO

2、ct.23–25,2012StrataConferenceMakingDataWorkOctober23–25,2012NewYork,NYStrataConferencecoversthelatestandbesttoolsandtechnologiesforthisnewdiscipline,alongtheentiredatasupplychain—fromgathering,analyzing,andstoringdatatocommunicatingdataintelligenceeffectively.Stra

3、taConferenceisfordevelopers,datascientists,dataanalysts,andotherdataprofessionals.Thecallforspeakersisnowopen.RegistrationopensinearlyJune.strataconf.com/stratany2012©2012O’ReillyMedia,Inc.TheO’ReillylogoisaregisteredtrademarkofO’ReillyMedia,Inc.12129DataforthePub

4、licGoodAlexHowardBeijing•Cambridge•Farnham•Köln•Sebastopol•TokyoDataforthePublicGoodbyAlexHowardCopyright©2012O’ReillyMedia.Allrightsreserved.PrintedintheUnitedStatesofAmerica.PublishedbyO’ReillyMedia,Inc.,1005GravensteinHighwayNorth,Sebastopol,CA95472.O’Reillyboo

5、ksmaybepurchasedforeducational,business,orsalespromotionaluse.Onlineeditionsarealsoavailableformosttitles(http://my.safaribooksonline.com).Formoreinformation,contactourcorporate/institutionalsalesdepart-ment:(800)998-9938orcorporate@oreilly.com.CoverDesigner:Karen

6、MontgomeryInteriorDesigner:DavidFutatoFebruary2012:FirstEdition.RevisionHistoryfortheFirstEdition:2012-02-17FirstreleaseSeehttp://oreilly.com/catalog/errata.csp?isbn=9781449329761forreleasedetails.NutshellHandbook,theNutshellHandbooklogo,andtheO’Reillylogoareregis

7、-teredtrademarksofO’ReillyMedia,Inc.DataforthePublicGoodandrelatedtradedressaretrademarksofO’ReillyMedia,Inc.Manyofthedesignationsusedbymanufacturersandsellerstodistinguishtheirproductsareclaimedastrademarks.Wherethosedesignationsappearinthisbook,andO’ReillyMedia,

8、Inc.wasawareofatrademarkclaim,thedesignationshavebeenprintedincapsorinitialcaps.Whileeveryprecautionhasbeentakeninthepreparationofthisbook,thepublishera