集成阻抗函數(shù)標定的OD估計雙層規(guī)劃模型研究.pdf

1、111111111111t11111111111111111111111111111111111Y1527739分類號：U49：F510710一20040287諼害犬海碩士學位論文集成阻抗函數(shù)標定的OD估計雙層規(guī)劃模型研究導師姓名職稱申請學位級別楊濤王元慶教授碩士學科專業(yè)名稱交通運輸規(guī)劃與管理論文提交日期2007年5月論文答辯日期2007年6月9日學位授予單位長安大學答辯委員會主席學位論文評閱人嚴寶杰教授張生瑞教授孫小端教授Abstra

2、ctThemodelswhichusedtoestimateODmatrixbasedontrafficcountsarepaidmoreattentionThetraditionalmethoddividesthiscourseintotwosteps：firsttoestimatetheODmatrixundertheconditionsofdeterminatedroadnetworkparametersandassignment

3、modelparameters；thenmodifyroadnetworkparametersandassignmentmodelparametersundertheconditionsofdeterminatedODmatrixHowevertheprobleminthismethodisthattheparameterswhichgotfromstep2arenotconsistent、析tlltheparametersgotfro

4、msteplRepeatiterationisnecessarytogetsteadyandconvergentresultHoweverthesteadyandconvergentparameterisusuallyCallnotbegotandsometimesnotconsistent，whichwillinfluencethefittingprecisionTheinfluencefactorsofODestimationpre

5、cisionareanalyzedinthispaperOnthebasisofODestimationtheorycurrentODestimationmethodsandBi—levelprogrammingmodel，theBilevelprogrammingmodelusedtoestimateODwhichintegrates01)estimationandBPRfunctionisputforwardinthispaperT

6、heimprovedmethodis：uplevelsubjectfunctionisaleastsquaresmodelwhichmakesthequadraticsumerrorofestimationmatrix，countvolumeandimpedanceminimumandlowlevelsubjectfunctionisastochasticuserequilibriumassignmentProbitmodel、杌thc

7、onstraintconditionsinwhichuserroutechoicebehavioriswellconsideredThenthesolutionprocedureisputforwardwhichbasedongeneticalgorithm，andprogrammedwithMatlabFinallythemodelandalgorithmaleappliedintheexamplenetwork，therationa

8、lityandvalidityofthemodelandalgorithmalealsoverified，whichindicatethatthemethodthispaperputsforwardCallimprovetheprecisionoffittingthantraditionalmethodKeywords：ODestimation；traveltimefunction；parametercalibration；bi—lev