玉米低温冷害远程诊断管理系统设计与实现

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1、中国农业科学院硕士学位论文玉米低温冷害远程诊断管理系统设计与实现姓名：刘爽申请学位级别：硕士专业：环境工程指导教师：孙忠富20080601AbstractWiththerapidprevalenceofprecisionagriculture，moreandmoleinnovativeandeffectiveresearchonpreventingvariousagrometeorologicaldisastersarerequiredtoreduceitsrestrictiononagriculturalproduction．T

2、hecropchillingdamageisoneofthetypicalagrometeorologicaldisasters，forwhich，thereexiststhemostimportantissueonhowtopreventandreduceitsimpactsbymoreeffectivediagnosisandaccurateprediction．Fortunately,therapiddevelopmentofagriculturalinformationtechnology,whichisrepresete

3、dbycomputertechnology,especiallybyInternettechnology,providesallimportantopportunitytoworkouttheremotediagnosisandmanagementsystemforagrometeorologicaldisasters．Throughinvestigatingthekeytechnologiesoftheremotediagnosisandmanagementsystem，aweb—basedmanagementsystemwas

4、presentedonthebasisofcollectingandprocessingtheexperienceandknowledgerelatedtomaizechillingdamageinnortheastChina．Forthecomputerprogram,thissystemwasdevelopedbyJ2EEandJava．Combinedwithanalysisoftheenvironmentaldataacquiredfromthewirelesstelemonitoringsystemseuedupinth

5、efield，thereal-timeforecastofmaizechillingdamagemaybemadeoutjustthroughtheInteract．ThemainpurposeofdesigningthissystemistorealizethesystematicfunctionbyaccessingInternet．Bylogginginthissystem,userscangetthefollowingservices：takingoptionsfromactiveandpassivecountermeas

6、uresforreducingmaizechillingdamage，makingreal-timemanagement，gettingreferenceofexperts’knowledgeandexecutingsystemadministration，etc．Besidesreliability,easymaintenanceandoperation，thesystemalsohaswideapplicabilitythatcouldprovidealluniversalsystemplatformofremotediagn

7、osisandmanagementformorecropmeteorologicaldisastersbyrebuildingthedata—baseandknowledge-base．Instructuraldesign，thissystemconsistsofthreetiers：1)Data-tier：includingreal—timedataofthefieldsacquiredfromthetelemonitoringsystem,historicaldatacollectedfromthemeteorological

8、stationsandexperts’experiences．Thissystemhasevidentadvantagesindataacquisition，suchasreal—timeandcontinuous，complete，accurac