現(xiàn)代農(nóng)林牧復合生態(tài)系統(tǒng)物流模型的建立.pdf

1、東北林業(yè)大學碩士學位論文現(xiàn)代農(nóng)林牧復合生態(tài)系統(tǒng)物流模型的建立姓名：袁洪亮申請學位級別：碩士專業(yè)：應用數(shù)學指導教師：顧鳳岐201006AbstractThecompoundecosystemofa鰣culture，forestryandstockraisingisacomplicatednetworkstructurewhichiscomposedbybiologysystem，environmentsystemandcontrollab

2、lesystemThispaperexploitsthetheoryofecologyandmathematicsa11dtllemethodofsystemanalysistesearchthematerialexchangerelationshipofeverypart，withtheaimtoenhanceholisticefficiencyofecosystemIntheecosystemconstitutedofagricul

3、ture，forestandstockraisingthedemandofremaininghighyieldsteadilymakeitnecessarytoobtainfavorablecirculationandexchangemuchsoonerandmuchbetterTheorganiccombinationofagriculture，for鋁tandstockraisingmakesomeagriculturebyprod

4、uctwhichmankindeouldn’tutilizedirectlyconversedintousefulliV爭stockproductInthecoBrseofconversion，theanimalactedanimportantrolebyprovidingmotilityorproducingorganicfertilizerwhichcouldn’trealizeinseparatedagriculturesyste

5、morforestsystemTheseilluminatetherearenotonlyobviousrelativedependencebutalsoIelativerestrictionshipintheexchangerelationofthethreesystemsThisistosayintheconversionprocessoftheenergyandmaterial，thebothpartiesallneedtocon

6、sumequitesomeenergies，andurgingtheproductiondevelopmentoftheothersimultaneouslyTherefore，inagricultureandforestrycombinedecosystem，theenergyandmaterialsofthelivestockhusbandrycomefromplantsystemandsoil，whiletheenergyandm

7、aterialsoflivestockfarmingalsoinputandsupplythesoilstoreroom，thenentertheplantsystemThreesystemscirculate，promoteandcontactmutuallyandformeffectivecirculationintheecosystemThispapersetsuplinedifferentialequationbyresearc

8、hingtherelativeparametersAccordingtocharacteristicofstructureandfunctionofthesystem，themodeloverlooktimelagBecausetheforestrypossessofthecharacteroflonggrowthperiodchangingslowlywithtimeandnotsensitivetofeedbackofsystem，

9、webuilduptheforestrysystemmodelseparatelyAccordingtotheactualdatawechooseappropriateparameterandthendiscusesandcalculatethecircumstanceofmaterialinputandoutputamongsub—systemandthewholeecosystemWemakeuseoftheconnectivest

10、abilitytheoriestocarryontheanalysisofthecompoundecosystem，andanalysisthelongtermpropertyofactualsystemThen，wediscusstheactualmeaningandstabilitypointindifferentproductionstructureWedifferentiatethestableabilityofthecompo

11、undecosystembasedonthemethodofloopanalysis，inorderthatdemonstratetheagriculture，forestandstockraisingsystemhasstructuralstableabilityandshowssomeusefuldirectiontoanalyzesimilarstructureKeywordsCompoundecosystem；Different