25503.生態(tài)風險評價的數(shù)學模型及應用研究

1、蘭州大學碩士學位論文生態(tài)風險評價的數(shù)學模型及應用研究姓名：杜靜申請學位級別：碩士專業(yè)：數(shù)學應用數(shù)學指導教師：陸凡20091201蘭州大學碩士論文AbstractEcologicalriskassessmentbelongstonewinterdisciplinarysubjectbetweenriskmathematicaltheoryandecologyItaimsattakingtheadvantageofriskassessmen

2、tanddecisiontheoryandmethod，makesanalysisandevaluationofecologicalsystem，especiallythepotentialrisksinweakecologicalsystemonthebasisofprinciplesandmechanismofecologicalsystem，andputsforwardthescientificmanagementanddecis

3、ionplanItisveryimportanttostartecologicalriskassessmentinprotectingecologicalenvironment，maintainingpublichealthanddevelopingeconomyandrealizingharmonyandcontinuousandsteadydevelopmentinsocietyeconomyandenvironmentInorde

4、rtoefficientlymanageecologicalsystem，theprobabilityandconsequencesunfavorabletoecologymustbepredictedandreducingthecomingdamagetoecologicalsystemThisthesistakesupthebasictheoryofecologicalriskevaluationanditspresentresea

5、rch，putsforwardthemathematicalmodelofecologicalriskevaluation；andaccordingtotheresultsofobservationandthefactsofresearcharea，theauthorhasmadeacalculationandanalysisonthelivingexamplesThemainresearchworkandresultsareasfol

6、lows：1figureouttheranksofbearingcapacityofwaterresourcesbyanalyzingitschangeswiththeapplicationofmainfactoranalysismethod；2throughGreyRelationAnalysis，desertificationandsoilalkalizationhasbeenstudiedandtheresultisthatthe

7、reisthemostsignificantrelationshipbetweendesertificationandfarminglandenlargement嬲wellasthatbetweensoilalkalizationandchloride；3throughFuzzyComprehensiveEvaluation，theeffectofincreasingpopulationonsocietyeconomyandenviro

8、nmenthasbeenanalyzedandtheresultisthatincreasingpopulationhelpsdevelopsocietyandeconomybutmakestheenvironmentWOrSeAsforthis，onthebasisofresultsfromavarietyofevaluationmethods，theauthorinthisthesis，hasanalyzedthecausesofc

9、hangesofwaterresourcesbearingcapacitydesertificationandsoilalkalizationandtheeffectofincreasingpopulationonsocietyeconomyandenvironmentInviewofrealisticconditionsofirrigateddistrict，someharnessingmeasureshavebeenputforwa