人工神经网络在资阳市小区域环境质量评价中的应用

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1、西南交通大学硕士学位论文人工神经网络在资阳市小区域环境质量评价中的应用姓名：王喜红申请学位级别：硕士专业：市政工程指导教师：杨立中20070501西南交通大学硕士研究生学位论文第lI页AbstractEnvironmentqualityassessmentwasoneofthemostimportantenvironmentalmanaginginstitutionsinchina．Itcanmakeascientificassessmentfortheenvironmentalqualityofacertainregion，thusprov

2、idescientificfoundationsforenvironmentalmanagement，environmentalengineering，environmentalstandards，environmentalplanning，comprehensivepreventionandtreatment，andecologicalenvironmentalconstructionetc．Scholarsbot．hdomesticandforeignhavedonemanyresearches．onmethodsforenvironme

3、ntalqualityassessmentinthepastyears，butmostofthemethodsaregeneralaccordingacertainenvironmentalelementtoassessmentofmultipleenvironmentalqualityindicesinabigregion，withoutproceedingenvironmentqualityassessmentof。severalenvironmentalelementsinaconcretionregion，thus，inthispap

4、er,applicationofassessmentmethodofANNtoassesstheenvironmentalqualityofsmallregion．Themethodisnoreferencetospanadministrativeregionandotherregionscouldbedividedintosmallregion，andaccordingtothetraitsoftheregiontoselectenvironmentalqualityparametersthenputthemintothemodeltoas

5、sessandpredictenvironmentalquality．Thus，themethodisuniversalapplicability．Inthispaper,theBP-ANNenvironmentalqualityassessmentmodelwasimproved，theexpertsamples(trainingsamples)ofBP·ANNmodelwereextendedtoimprovemodelsantiinterferencecapacityandveracity．Thatis，created10trainin

6、gsamplesrandomlybetweensamplesbasedonenvironmentalstandardsinstitutedbygovernment．AndtheimprovedBP—ANNmodelisappliedinairandgroundwater,environmentalqualityevaluationofthesecondbridgeareaofTuoriverinZiyangcityssmallregion．thenenvironmentalmonitoringresults(involvesairmonito

7、ringresultsandgroundwatermonitoringresults)ofZiyangcityssmallregionwasputintomodelrespectivelytoaSSeSSairqualityandgroundwaterqualityofZiyangCityssmallregion，theresultsshownthatBP·ANNmodelisfeasibleinenvironmentalqualityassessment。atthesametime，assessedconclusionsareobjecti

8、veandassessedmodelisuniversalapplicability．西南交通大学硕士研究生学位论文第1II页Bycompanngtheevalua