［33］WANGD，MAG，SONGX，etal．Energypriceslumpandpolicyresponseinthecoal-chemicalindustrydistrict:acasestudyofOrdoswithasystemdynamicsmodel［J］．EnergyPolicy，2017，104:325－339.ＲesearchonsynergisticeffectsofgreendevelopmentelementsinBeijingDAITie-jun，LIＲui(SchoolofEconomicsandManagement，BeijingUniversityofTechnology，Beijing100124，China)Abstract:TofindwaystoimprovethegreendevelopmentlevelofBeijing，thepapercombinestheDPSIＲmodelandthematerialflowanalysistoevaluatethestatusquoofgreendevelopmentinBeijingscientificallyandcomprehensively，andconstructsasystemdynamicsmodel，composedofeconomy，population，resources，environment，technology，andpolicyelements．Eightschemesaresettostudytheimpactofseparateandcoordinateddevelopmentofdifferentelementsonthegreendevelopmentsystemquantitativelyandtoexplorewhetherthereisasynergisticeffectofmulti-elementcoordination．Itwasfoundthat:(1)GreendevelopmentlevelofBeijingwasgenerallygoodfrom1992to2019，withanaverageannualgrowthrateof0.79%，especiallyafterthe“EleventhFive-YearPlan”period;(2)Underthecurrentstateofdevelopment，from2020to2035，theaverageannualgrowthrateofthegreendevelopmentlevelis1.13%，andthegreendevelopmentlevelimprovessteadily;(3)Inthecaseofindependentdevelopmentofelements，promotingeconomicdevelopment，reducingpopulationsize，reducingresourceconsumption，reducingenvironmentalpollution，strengtheningtechnologicalinnovationandincreasinggovernmentinvestmentwillmaketheaverageannualgrowthrateofthegreendevelopmentlevelofBeijingfrom2020to2035tobe1.14%，1.04%，1.17%，1.14%，1.39%and1.13%，amongwhichthepromotioneffectsofstrengtheningtechnologicalinnovationisthemostsignificant，andreducingpopulationsizeistheleastsignificant;(4)Inthecaseofcoordinateddevelopmentofelements，from2020to2035，theaverageannualgrowthrateofgreendevelopmentlevelis1.47%，andthecoordinateddevelopmentofsixelementswillpromotethegreendevelopmentlevelofBeijingmorethantheindependentdevelopmentofelementswilldo;(5)From2020to2035，thecoordinateddevelopmen...
