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马 锐(,650221) ,“”.、,“”,.:;;;【】O154 【】A 【】1672—8513(2004)04-0302-030 ,,.,.,,,,;,,,,,,“”“”.,20%.2003,52,,,,,,77.4%,10km/h,5km/n,,,.,,,,“”,“”,.(,,2000,1381,630.7,2001,1985,910.9,2002,3621,1339,2003,3356,975.5,,1975),,,,,..1 ,,,,,,,.,,,.,、,,“”,“”.“”,,.,,,,,?“”.,“”,.,“”.,?,,.:2004-04-20: (1963-),,,,.134200410()JournalofYunnanNationalitiesUniversity(NaturalSciencesEdition)Vol.13,No.4Oct.20042 ,.,,,(),,,,,,,,,,.,(),.3 T1———;T2———;T3———,T=T1+T2+T3.T2、T3.V0,I,L,T2=I+LV0.,,I+L.,.m,f,x(t),fmg(g),,: md2xdt2=-fmg(1):x(0)=0,dxdt|t=0=v0,dxdt|t=0=v0:dxdt=-fgt+v0,t1=v0fg,,x(0)=0, x(t)=-12gt2+v0t(2) x(t1)=-12fg(v0fg)2+v0v0fg=12v02fg,,T3=x(t1)v0=12v0fg,,1～2., T=I+Lv0+v02fg+T1(3),,,20k/n,15～20m,3.5m,1300kg,,5min100,,,.,.4 ,,,3034 :,,、,L,v0,,,.,、.“”,.:[1] .、[M].:,1998.88-91[2] .[M].:,2000.171-176.[3] ,.[M].:,1998.60-65.[4] .[M].:,2000.295-298.[5] .[M].:,2003.79-107.[6] .[M].:,177-204.AnoptimalapproachtomodelandanalysethetrafficlightsMA Rui(DepartmentofComputerScience,YunnanUniversityofFinance&Economics,Kunming650221,China)Abstract:Withtherapiddevelepmentofsocialeconomy,trafficjamhascometobeknownbypublicastheseverecitydiseasethatnoonecandisregard.Byusingdifferentialequationmodel,Thispaperdedicatestoseekfortheoptimalflashingfrequenceofyellowlightatthecrossroad,whichwillhavepracticalmeaninginalleviatingthepaincausedbytrafficjam.Keywords:traffic;differentialequation;crossroad;yellowlight(:杨多立)(上接第271页):[1] ,.[M].:,2003.[2] ,,.[M].:,1993.98-126.[3] ,.[J].,1991,13(1):21-27.[4] .[M].:,1980.142-208.Thebestchoicemethodofthedataprocessingintheheavymagnetism'sabnormityreflectionLIJiang-yun(KunmingMetallurgyCollege,EnrollmentandEmploymentDivision,Kunming650033,China)Abstract:Duringthedataprocessingoftheheavymagnetismusingdifferentwayinchoosingmayresultindifferentconclusion,soastohavingadirectlyaffectiononthediscoveryofthemine.Inthisessay,theauthortellsusthatthroughchoosingobjectivestogettheminimumofthenon-linearobjectivesbytheprincipleofthequadraticmultiplicationtodothedataprocessingtogetthebestparameteroftheheavymagnetismabnormityre-flection,andthiscabbecalledthebestchoicemethod.Keywords:abnormity;reflection;thebestchoicemethod(:杨多立)304 () 13