用元胞自动机模型研究混合交通流的特性

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1、广西师范大学硕士学位论文用元胞自动机模型研究混合交通流的特性姓名：李启朗申请学位级别：硕士专业：理论物理指导教师：刘慕仁;孔令江20060101=©ÁStudiesonMixedTrafficFlowPropertiesbytheCellularAutomationModelsAdvisers:Prof.LiuMurenandProf.KongLingjingGraduate:LiQilangGrade:2003Majorin:TheoryPhysicsComputationalphysicsAbstractCellularau

2、tomationisakindofveryeffectivetooltostudynonlinearcomplexsystemsinmanyresearchfieldsandithasanextensiveapplicationinfuture.Cellularautomationmodelisdiscreteintime,spaceanditsstateandhasbeenappliedtotrafficflowstudyrecentlyandwehavefoundaseriesofcellularautomationtrafficflo

3、wmodels.Duetotheirparallelcomputationalgorithm,distinctionofphysicpictureandflexibilitytodesignmodel,thecellularautomationtrafficmodelshavebeenutilizedtostudymanytrafficphenomenaandwehaveattainedalotofachievements.Basedonpredecessors’works,thispaperstudiesproblemsofone-

4、laneandroadnetworks,consideringpropertiesofrealtrafficflow.Firstly,thispaperconsidersdriverscharacteristicbyintroducingdifferentdecelerationprobabilityfordifferenttypeofdriversintheNScellularautomatamodelforsingle-lanevehicletrafficflow,aggressivedriversarecharacterizedbya

5、smallervalueofthedecelerationprobability,carefuldriversarecharacterizedbyahighervalueofthedecelerationproba-bility.Westudythepropertiesofthemixedtrafficflowwhichiscomposedofaggressivedriversandcarefuldrivers.Theproportionofaggressivedriversamountandcarefuldriversamoun

6、tandtheirdecelerationprobabilityinfluenceonthecriticaldensityandthetrafficflowgreatly.thisresultoffersanexplanationwhichisdisperseddistributionofdataontrafficflowbasediagram.iii=©ÁSecondly,undertheperiodicboundarycondition,westudythepropertiesofthemixedtrafficflowonacrossroad

7、modelsystem.Thevehiclenatureisreflectedbywayofthemaximumspeedofthevehicle,theslowvehiclespossessthesmallerofmaximumspeed,meanwhile,thefastvehiclespossessthebiggerofmaximumspeed.Westudythatthemixedfractionoftheslowvehiclesandthefastvehiclesexertsonthetrafficflow.Thisres

8、ultsindicatethatthemixedfractionoftheslowvehiclesandthefastvehiclesonlyinfluencethreezonesinthetrafficflowphasediagram,meanwhile,withtheslowvehiclesg