简介：Basedontheinformationentropy,amodelforwaterqualityassessmentisUsingthismodel,thepapergivesacasestudyonthewaterqualityassessmentRiver.Thespace-timevariationlawofthewaterqualityisanalyzedalsointhisresultindicatesthatthemodelpossessessomeclearmathematicandphysicalanditissimple,practicalandaccurate.

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简介：BybuildingupanAIDSmodelofChineseruralresidents,classifiedintofivegroupsbyincome,concludingsixcommodities(services),analysesthediversityofconsumptionbehavioroutofincomedifference.Wedrawthefollowingconclusions:Firstly,thereexistssomedifferencebetweendifferentincomegroupsincommodities(services)consumption.Secondly,increaseoffarmers'incomewillbefavorabletotheenhancementofconsumptionlevelandupgradingofconsumptionstructure.Thirdly,themediumincomegroup,asonespecialmass,featuresatransitionalmainbodyofconsumptionstructure.Finally,thepolicymakersshouldsupportthefarmerswithlowerincomeincompulsoryeducation,suchasmoreandnecessarytransferpayments.

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