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1、附录Ⅰ外文文献原文、译文Therealizationofwirelesssensornetworksandapplicationsinagriculture1IntroductionWirelesssensornetworks(WirelessSensorNetwork,WSN)aredeployedinthemonitoringareabythelargenumberoflow-costmicrosensornodes,wirelesscommunicationthroughtheformation
2、ofamulti-hopnetworkself-organization.Theaimistoperceivecollaboration,collectionandprocessingofnetworkcoverageintheperceptionofobjects,andsendobservers."Sensors,sensingobjectandtheobserver,"constitutethethreeelementsofthenetwork.Herethatthesensorisnotint
3、hetraditionalsenseofthesimpleperceptionofphysicalsignalsandthesensorintoadigitalsignal,whichisthesensormodule,dataprocessingmoduleandwirelesscommunicationmoduleintegratedinasmallphysicalunit,thatis,enhancedfeaturesthanmanytraditionalsensorscannotonlybea
4、wareofenvironmentalinformation,butalsodataprocessingandwirelesscommunicationcapabilities.Withthebuilt-insensornodesinavarietyofsensors,wheretheenvironmentcanmeasureheat,infrared,sonar,radarandseismicsignalsandothersignalstodetecttemperature,humidity,noi
5、se,lightintensity,pressure,soilcomposition,movingobjectthesize,speedanddirection,andsomanyphysicalphenomenaofinteresttous.Wirelesssensornetworkisanewmodeofinformationacquisitionandinformationprocessing.Becauseoftheshortageofwaterresourcesareataconsidera
6、bledegree,plus90%ofthewaste,untreatedsewageorhandlingstandardsfordirectdischargeofwaterpollution,waterqualityislowerthan11%ofagriculturalwatersupplystandards.Wateristhelifebloodofagriculture,isthecontrollingelementoftheecologicalenvironment,butitisalsos
7、trategiceconomicresources,extractionofgroundwaterbypumpirrigationoffarmland,rationaluseofwaterresources,developmentofwatersupply,improvetheecologicalenvironmentinChinaiscurrentlyaccurateAgriculturekey,souseofirrigationwaterandenergysupplyintoday'sworldi
8、sthegeneraltrendoftechnologicaldevelopment.2Overviewofwirelesssensornetworks2.1ThesystemarchitectureofwirelesssensornetworksWirelesssensornetworksystemarchitectureshowninFigure1,typicallyincludesensornodes,aggregationnodesandmana
