西南交通大学学报

Quasi一StaticCalculationMethodforDynamicBendingStressof RailSPlicesforFrozenJointofJointlessTrack

LIUXue一yi, LIUAiping

2001, 14(4): 337-340.

[Abstract](1338)

Abstract:
AealeulationmethodforthestatiemomentofrailsPliees15presentedbysimplifyingtherail splieesintothestruetureofahingeplustorsionalsprings，and15eomParedwiththeeomparatively aeeuratedoublelaminatedbeammethod，withanermrofabout士10%.Throughmodifyingthe veloeityandthelateralforoeeoeffieients，thequasi一statieealeulationmethodforthedynamiebending stressofrailsplieesforfrozenjoint15proPosedbasedontheealeulationmethodforthedynamie bendingstressofrails.Themethod15validatedbyeomParingtheealeulatedresultsandthedatafrom fieldtest.

PredictionModelforSinkholesalongRailways

XUGUO-qiang, YANGLi一zhong, HEYUYu一long

2001, 14(4): 341-345.

[Abstract](1332)

Abstract:
Thefaetorsaffeetingthehappeningofsinkholesalongrailwaysandtherelationshipsbetween thefaetorsareanalyzed.Apredietionmodel15proposedbasedonmain一faetor一analysisanddistanee- estimation.Inthemodel，theoriginalveetorsofthefaetorsarereplaeebysynthetieveetorstoavoid redundantinformationandeountfortheweightsofthefaetors.Thefeasibilityofthemodel15Provedby aPPlieation.

StatistieAnalysisoftheUltimateBearingCaPacity ofFoundationGroundonGravelly50115

LUoShu一xue, TANGWAN-chun

2001, 14(4): 346-349.

[Abstract](1201)

Abstract:
Basedontheeolleetedtestdataaboutfoundationloadandtheworkdoneineailierstage， thenominalvalueformofthefoundationultimatebearingeapaeityongravelly50115，thedistribution typeandthestatistieeharaeteristeeoeffieientsareobtained场usingtheprineipleofprobabilitistie ，tatistiesandengineeringexPerienee.ThislaysafoundationforreviseofTheeodefordesignonsubsoil andfound以勿nofrailw叮bridgeandcul公e叮andforthereliabilitydesi，ofsubsoilandfoundation.

ModelTestS加dyofDynamiePerformancesof theSubgradeRelnforcedwithGeocellandGeonet

CAOXin一wen, CAIying, SUjian

2001, 14(4): 350-354.

[Abstract](1427)

Abstract:
Fivegroupsofmodeltestsareearriedoutunderthesimulatedfieldeonditionstoexamine thedynamieperformaneesofthesubgradereinforeedwithgeoeellandgeonetrespeetively.Cyelie loaaing15repeatedlo6timesineveoupoftesttosimulatetheaetionofwheelloadonthe subgrade.Thedynamiestress，permanentdeformationandelastiedeformationaremeasuredto eharaeterizethebehaviorofthesubyde，andtheirvariationtrendswiththedynamieloadingare studied.TheeorTelationbetweenthesesubgradePerformaneesandthed”amieload15devefoped，In addition，theirovementstothedynamieperformaneesofsubyadewithgeoeellandgeonetare analyzedandeomPared，andthediffereneesintheireffeetsarealsoanalyzedandeoneluded.

AnalysisofSeismieResPonsesofShenzhenSubwsy

GAOFENG, GANBao一shu

2001, 14(4): 355-359.

[Abstract](1286)

Abstract:
Aeeordingtotheanti一seismiedesi，ofShenzhensubwoy，theseismieresponsesofthree typiealeross一seetionsareanalyzedwithNewmarkstep一by一steptimeinte笋tionmethod.Theanalysis15 basedontheresultsofstatiefiniteelementanalysisbyusingreleaseloadingmethodandthoseof vibrationanalysistodefinetherationaltimestepforsub一sPaeeiteratlons.Theweakportionsofthe linerunderseismieloadingaredetermined.

ComPutationoftheUltlmateBearingCaPacityofSteelReinforeed ConCreteLoW-RISeShearWallSwithFrame

HUANCshuang一hua, HUANCXiong一jun

2001, 14(4): 360-364.

[Abstract](1257)

Abstract:
Basedonfiniteelementanalysisaswellastheresultsofexperimentalresearehes，amodel15 putfonvardforeouptingtheultimatebearinge叩acityofthelow一riseshearwallsinwhiehbending failureoeeursinframeeolumns，andeomputationalformulasaresetup.TheeomPutedvaluesgivenby theformulasshowagoodag比ementwiththetestvalues.ThiseomPutationmethodprovidesa theo比tiealrefereneefordrawinguPanationaldesigneodeoflow一riseshearwallswithframeinthe futu花

AVehicularGPSCoordinateTransformFormulaandItsAPPlieation

LUODe一an, LIAOLI-qiong

2001, 14(4): 365-368.

[Abstract](1206)

Abstract:
AvehieularGPSeoordinatetransformationfoulaanditsworkingproeedureare theoretieallydiseussed.Rationalsimplcation15madetotheooordlnatetransformationformulaof praetiealvehielenavitionandal一timemonitoringsystems.It10shownthatthedynamiepositioning ‘euraeyOfavehieularGPSsystem15eatlydePendentonthedynamiepositioningaeeuraeyofthe hardware.Therefore，thesimplifiedformula15highlyreeommendediftheerrorscausedbyeoordinatetransformationdonotresultinobviousdeereaseind”amiePositioningaeeuraeyofaGPSsystemin whole，

CouPledVibrationofTrainandCable一StayedBridges 初ththeEffeCtsof下Vind

GEYU-mei, ZHOUSHU-hua, LILONG-an

2001, 14(4): 369-373.

[Abstract](1506)

Abstract:
InthisPaPer，thetrainsafetyandridingeolllfortofPassengersareanalyzed，bytaking WuhuBridgeovertheYangtZeRiverasanexampleandwindloadontrainsandthebridgeinto eonsideration.Windloading15eonsideredtobefluetuating，thespeedofwhieh15simulatedwith MonteCarlOmethodaeeordingtoSimiusPeetmm.Colnbinedwiththeaerodynamieparametersofthe bridgeandtrainsmeasuredbywindtunneltests，thenaturalwindloadaetingonthebridgeandtrains 15simulated.Dynamiee四ationsofloeomotivesandearsareestablishedaeeordingtothetheo巧of struetural街namies.VibrationequationsforthebridgearederivedusingsPatialbeamelement.Traek irregularity15simulatedwitha脚de6(thebestofthespeeifieation).Thesimulationresultsshowthat themaximumwind印eed15lessthan30而5foratraintorunsafelythroughtheWuhubridge.

Buffeting·RestrainingMeasuresforLongSPan Cable·StayedBridgesunderConstruction

LlYong一le, zhouShu一hua, zhanghuan-xin

2001, 14(4): 374-377.

[Abstract](1448)

Abstract:
Thetheo叮ofealeulatingthebuffetingresponseofbridges15introdueed，andthebuffeting resPonseOfaeable一st叮edbridgeatmaximumtwineantileversstageduringereetion15ealeulated.Two buffeting一restrainingmeasures，settingtempora叮eablesandapplyingbraeketbesidetower，are analyzed.Theresultsshowthatthesetwomeasuresareeffieientandpraetieableforlongspaneable- stayedbridgesundereonstruetion.

ChaotieBehaviorsinFinlteSubshifts

XIEJIAN-hua

2001, 14(4): 378-382.

[Abstract](1119)

Abstract:
Aneeessaandsuffieienteondition15givenfortopologieallymedfinitesubshiftsthatare deseribedbydireetedgraPhs.Basedonthisresult，thesPeetraldeeompositiontheoremsareProvedby usingpermutationeanoniealformsofnonnegativematriees.Theexisteneeofhypetholieinvariantset possessedbythequadratiemap15re一examined.Somedetailsmissedintherefereneesareprovidedand anewtyPeoffinitesubshiftsisfound.

ComParisonofSeveralBaekwardCharacteristie DifferenceSchemesforPureConvectiveEquations

DONGBing, ZHUBing, ZHOUBen一kuan

2001, 14(4): 383-386.

[Abstract](964)

Abstract:
Severalbaekwardeharaeteristiediffereneesehemesthathavebeenemployedtosolvepure eonveetiveequationsarereviewedinthispaPer.Theaeeuraeyofthesesehemes15eomParedwithtwo typiealtestexamples.Theresultsshowthat，withtheinereaseintheinte印olationpoints，the eomputingaeeuraeyinereases，buttheeomPutingeffieieneydeereases.It15alsoshownthatthe feasibilityOfasehemedependsoneonveetiveProfiles，eitherflatorsharp.

ThermalResidualStressesinAlignedShortFiber ReinforcedMetalMatrixComPosites

KANGGuo一zheng, CAOqing

2001, 14(4): 387-391.

[Abstract](1392)

Abstract:
Basedonthesinglefibermodelofalignedshortfiberreinforcedmetalmatrixeomposites， thethermalresidualstressesandtheirdistributionareealeulatedwiththeaxi一symmetriealelasto一plastie finiteelementmethod.Theeffeetsofvariousmierostrueturalparametersonthermalresidualstressesare diseussed.Theeffeetsofthermalresidualstressesonstresstransferinali，edshortfibereomposite underaxiallyappliedloadareanalyzed.It15shownthattheunmatehedthermalstrainresultsin eompressionalstressesinthefibers，tensilestressesinthematrix，andeompressionalnormalstresses oninterfaees.Thermalresidualstressesdegradesthedegreeofstresstransferbetweenmatrixand fibers，andharxnfultotheimProvementofthemeehaniealpropertiesoftheeomposite.

SimulationofMeshingProeessofSPurGearTeetwithWornSurfaces

SONGXiao一Xin

2001, 14(4): 392-395.

[Abstract](1124)

Abstract:
Thegearteethandmeshinglinearedistortedinthemeshingproeessasaresultofwearing Anumeriealmodelfortoothprofiles15ProposedaeeordingdataofthetemPerature.sPurgearsinthetransmissionboxofaneleetrifiedloeomotive.tothemeasuredTheneeessaryeonditionsforworngearstomeshandthengearfunetionsofthemeshingpointseharaeteristiesofthegearsinvariousextentofwearingandtheeorrespond ealeulated.afeingderived.Themeshingmeshinglinesarealso

AnAssignmentModelofDynamieTransPortation NetworkFlowsforSystemOPtimization

YEHUAI-zhen, ZHOUXIAN-wei, CHENCHANG-he

2001, 14(4): 396-400.

[Abstract](1499)

Abstract:
Assignmentproblemoftransportationnetworkflows15akeyteehniqueofintelligent transportationsystem，andit15veimportanttobuildtheassignmentmodeloftransPortationnetwork andtodesignthe.relevantalgorithm.Inthispaper，amodelfortheoptimaleontroloftheassignment problemofthedynamietransportationnetworkflows15built，andthenit15transformedintoasimple andspeeialnonlinearPronuningproblembyaseriesofinte1transforms.Overandabove，the authorfoeusesonthesimplifieationoftheoPtimaleontrolmodeltofurtherstudythepropertiesand algorithmdesi，ofthesimplifiedmodel，

ModelandAlgorithmsforMixedFleetVehicleRoutingProblem withSoftTimeWind0WS

yuanQing一da, du-wen, ZHOUZai一ling

2001, 14(4): 401-406.

[Abstract](1322)

Abstract:
Thetypiealvehieleroutingpmblem15expandedtothesituationthateustomershavethe restrietionofsofttimewindowsandadePothasvariouskindsofvehielestodistribute.After eonstruetingamathematiealmodelfortheProblem，thispaPerfoeusesontheintroduetionOfthedesign ProeedureofTsalgorithmforsolvingtheProblem.Andthen，eombinedwiththeadaPtivememory proeedure，thepseudo一eodedeseriptionof仆algorithmandanexamplearepresented.

ComPuterAidedCyclingArrangementofPostalTruckS

YANGwei, HEYi一gong, DuWEN

2001, 14(4): 407-411.

[Abstract](1159)

Abstract:
TheeoneePtofeyelingarrangementofPostaltrueks15introdueed.Amathematiealmodelfor theeyelingarrangementofpostaltrueksofprovineialpostaltransportationeenters15pmposedbasedon thepraetieesintheindust.Itsalrithmandtheflowehartofsoftwarearepresented.Examplesof applieationofthesoftwareinSiehuanandTibetarealsopresented.Theproposedmethodappliesalso toarrangementofothertypesoftransport.

TheRationalScaieofHu幻以anResourcesfor theRailwayTransPortationIndustryinChina

ZHAODONG-mei, ZHANGJIAN-yong

2001, 14(4): 412-415.

[Abstract](1192)

Abstract:
Atpresent，humanresoureesslusbeeomesaveseriousproblemfortherailwy transportationindustryinChina.Inthispaper，therationalsealeofhumanresoureesfortherailw叮 transportationindustryinChinaisanokzedquantitatively.Theresultsindieatethattherationalseale15 1.40miilionsto1.68millions.SomesuggestionsarePutfogardtoredueethesu印lus.

EstimatingtheEcono而cBenentofRunningTiltingTrains intheSouthwestofChina

LIZONG-ping, XUJie, ZHOUZAI-ling

2001, 14(4): 416-420.

[Abstract](1128)

Abstract:
Byanalyzingtheeharaeteristiesandapplieationseopeoftiltingtrains，thispaperdiseusses theneeessityandfeasibilityOfrunningthiskindoftrainsinthesouthwestofChina.Then，byfinaneial analysis，itestimatestheeeonomiebenefitsofrunningthetiltingtrainsinthesouthwestofChinainthe years2005and2015.Theresultsshowthatit15feasibletorunthetiltingtrainsinthesouthwestof Chinabeeauseiteanbringeonsiderableeeonomieandsoeialbenefits，andthatthebenefitswillbe moreremarkableifehe即erequiPmentmadeinChina15adopted.

nExPloratoryStudyonMeasuresto FormulateFreeway，STollStandard

LONCYong, JiangGe-fu, FengYun-cai

2001, 14(4): 421-424.

[Abstract](1239)

Abstract:
InordertoimProvethemanagementandadministrationofthefreewaysinPeratlon， rationallyassignthesoeialresourcesandaehievethesustainabledeveloPmentoffreeways，the author analyzesthefaetorsthatinflueneethefreew叮，5tollstandard，andexPlorestoforeeastthetotal Basedonthesefaetorsandthetolltotal，atollstandardmodel15established.

ImProvedBPAlgorithmand115APPlicationinPre山etionofStockPrice

xiangXiao一dong, guohui一huang, diaoshang一min

2001, 14(4): 425-427.

[Abstract](1412)

Abstract:
InordertospeedtheeonvergeneeofBPalgorithm，thisPaPerPutsfo哪ardanew stimulationfunetion，whiehhasanexPlieitphysiealmeaningand15abletorefleettheoptimization esseneeofhumanbeings，brains.ThroughdynamieallyadjustingtheParametersofthestimulation funetionandeolnbiningotherimprovedBPalgorithms，theauthorsusethestimulationlunetionto predietthePrieeofastoekandgetasatisfaeto巧result.ontheotherhand，thepredietabilityofstoek prieesalsoProvesthenoneffeetiveoftheimmaturestoekmarketsofChinafromanotherangle.Aslong a，aproperpredietionmod6115ehosen，peopleeangetmoreprofitsthanaveragemarketearnings.

AgUityEvaiuatingModelofEnterprises

WUZhen一ye, MAJun一gang

2001, 14(4): 428-432.

[Abstract](1572)

Abstract:
Throughtheanalysisofthefactorsthatidueneetheagilityofentrprises，ahierarchied graphoftheevahiation叮stem15built，andtheweightsoftheoefaeto玲areobtainedwithattribute hiehiealmethod.Thenthemulti一gradefuzZyassessmentmethod15usedinevaluation.Theevaluationresultsofsinglefaetorsareeressedthrougharadargranh.Afterthefinals”thetie evaluation，theorderofente印risesinthesameagilityelass15sortedaeeordingtotheagility.In addition，throughtheevaluationOfthetransformingabilityofenterprises，thelocationsofthe enterpriseoinagilesPacearedeterminedandshowningraPh.

Value-at-RiSkMethodforPortfolioriskEStimation

TIANJun

2001, 14(4): 433-436.

[Abstract](1177)

Abstract:
Thevalue一at一risk(VaR)modeldevelopedreeently15amathematiealmodeltoestimat。and eontrolfinaneialrisk.Thedisadva乓tagesoftraditionalmethodsarepointedout.TheVaRmethodfor porifolioriskestimation15proposed.IntheproPosedmethod，theVaRvalue15ealeulatedwith geometrieyieldthat15definedbylogarithmieeostratio.ThelimitationsofVaRmethodaroalso exPlieated.

KnowledgeRePresentationandReasoningonPatternClasses

PANWU-Ming, XUYANG, LITIAN-Rui

2001, 14(4): 437-439.

[Abstract](1145)

Abstract:
ThereeommonlyexisttherelationshipsbetweenPieeesofknowledgethatarerequiredininterpolatingreasoning.However，there15notaframeworkavailabletopresenttheserelationships. Knowledge15involvedimpliedlyinfuzzyreasoning.Inthispaper，aknowledgerepresentationframe， patternelasses，15proposedtorepresenttherelationships.Thereasoningmethodwithintheframe15 alsoputforward.Thismethodappliestowiderareasthantheeonventionalfuzzyreasoningdoes·

AnoverallSehemeforHighTemPeratureSuPercondueting MaglevMeasurementSystem 一DataAequisitionandMotionControl

ZHANGCui一fang, HUANGHai一yu, DENGChang一yan

2001, 14(4): 440-443.

[Abstract](1105)

Abstract:
Anoverallsehemeforthedataaequisitionandmotioneontrolofhightemperature supereonduetingMaglevmeasurementequipment15presented.Thehardwareandsoftwaredesignsof thesehemearediseussedelaborately.Usingthesystem，theProPertiesofsupereonduetingbulk magnetseanbedeterminedautomatieallyundervarioustesteonditions.Satisfaetoyresultsareobtained inthepraetiealapplieation.

AnAlgorithmforshortestPathofDouble·IooP NetworkSnL(N，h)(hIN)

CHENZhong一xue, GEPan

2001, 14(4): 444-447.

[Abstract](1285)

Abstract:
Thispaperanalyzesakindofdouble一loopnetworksDL(N，h)，wherethegreatesteommon divisor15equaltoh.ItprovesthattheshortestPathbetweenanytwogivennodesinthesenetworks15 oneandonly，andeanbeexpressedwithsimPlemathematiealequations.Theequationsfortheshortest patharepresented，andbasedonthemasimplealgorithm15proposedtofindtheshortestpathforany pairofnodesinthesenetworks.Inaddition，thediameterandotherissuesaboutthiskindofnetworks arediseussed.It15provedthattheaveragedistaneebetweentwonodes15equaltohaifofthediameter.

AColltrolStrategyofDistrictHeatingsystems

2001, 14(4): 448-451.

[Abstract](1086)

Abstract:
ByaoptingtheadvaneedteehniquesusedinnorihernEuroneandtakigthepraetieesin Chinaintoaeeount，anewstrategyforautomatieeontrolofdistrietheatingsystems15proposed.The heatingsystemautomationwillfoseeontrolinaeentralizedanddistributedheatingsystemextensively usedinnorth.Europewhentheheatsource15insuffieient.Thisproblem15solvedbyusingthe proposedstratgy.Alsopresented15amethodtodeterminetheworstloopandtoealeulatethegiven Pressurediffereneesintheworstloopinaheatinsystem.

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2001 Vol. 14, No. 4