简介：Wepresentasemi-customdesignmethodologybasedontransistortuningtooptimizethedesignperformance.Comparedwithothertransistortuningapproaches,ourtuningprocesstakesthecross-talkeffectintoaccountandprominentlyreducesthecomplexityforcircuitsimulationandanalysisbydecomposingthecircuitnetworkutilizinggraphtheory.Furthermore,theincrementalplacementandroutingforthecorrespondingtransistortuninginconventionalapproachesisnotrequiredinourmethodology,whichmightinducetiminggraphvariationandadditionaliterationsfordesignconvergence.Thismethodologycombinestheflexibleautomatedcircuittuningandphysicaldesigntoolstoprovidemoreopportunitiesfordesignoptimizationthroughoutthedesigncycle.

简介：Wepresentasemi-analyticalmethodofcalculatingtheelectrostaticinteractionofcolloidsolutionsforconfinedandunconfinedsystems.Weexpandtheelectrostaticpotentialofthesystemintermsofsomebasisfunctionssuchassphericalharmonicfunctionandcylinderfunction.Theexpansioncoefficientscanbeobtainedbysolvingtheequationsoftheboundaryconditions,combiningananalyticaltranslationtransformofthecoordinatesandanumericalmultipointcollectionmethod.Thepreciseelectrostaticpotentialandtheinteractionenergyarethenobtainedautomatically.Themethodisavailablenotonlyfortheuniformlychargedcolloidsbutalsofornonuniformlychargedones.Wehavesuccessfullyappliedittounconfineddilutedcolloidsystemandsomeconfinedsystemssuchasthelongcylinderwallconfinement,theair–waterinterfacialconfinementandporousmembraneconfinement.Theconsistencechecksofourcalculationswithsomeknownanalyticalcaseshavebeenmadeforallourapplications.Intheory,themethodisapplicabletoanydilutecolloidsolutionswithanarbitrarydistributionofthesurfacechargeonthecolloidalparticleunderaregularsolidconfinement,suchassphericalcavityconfinementandlamellarconfinement.

简介：Amodifiedmovingparticlesemi-implicitmethod(MPS)ispresentedforincompressiblefluids.Modificationisontheremovalofimaginarynodestoenforcetheboundaryconditions.Comparisonwiththeoriginalimaginary-nodeschemehasprovedthevalidityoftheproposedmethod.PerformanceofMPSmethodingeneralisalsoinvestigatedbycomparingtheresultsofLid-drivenandnaturalconvectionproblemswithfinitevolumemethod(FVM).ItisfoundthatMPSmethodshowsrelativelystrongnumericaldiffusion,andforconvectionproblems,MPSmethodappearstobelessrobustthanFVM.Thoughbetterresultscouldbeobtainedwithdifferentkernelfunctions,suchimprovementisquitelimited.

简介：Runge-Kuttamethodiswidelyappliedtosolvetheinitialvalueproblemofordinarydifferentialequations.TheimplicitRunge-Kuttawithbetternumericalstabilityforthenumericalintegrationofstiffdifferentialsystems,buttheformulatehastraditionallybeenonsolvingthenonlinearequationsresultingfromamodifiedNewtoniterationineverytime.Semi-implicitformulatehavethemajorcomputationallyadvantagethatitisnecessarytosolveonlylinearsystemsofalgebraicequationstofindtheKa.

简介：BasedontheWeierstrassellipticfunctionequation,anewWeierstrasssemi-rationalexpansionmethodanditsalgorithmarepresented.Themainideaofthemethodchangestheproblemsolvingsolitonequationsintoanotheronesolvingthecorrespondingsetofnonlinearalgebraicequations.WiththeaidofMaple,wechoosethemodifiedKdVequation,(2+1)-dimensionalKPequation,and(3+1)-dimensionalJimbo-Miwaequationtoillustrateouralgorithm.Asaconsequence,manytypesofnewdoublyperiodicsolutionsareobtainedintermsoftheWeierstrassellipticfunction.MoreoverthecorrespondingnewJacobiellipticfunctionsolutionsandsolitarywavesolutionsarealsopresentedassimplelimitsofdoublyperiodicsolutions.

简介：

简介：

简介：

简介：Asemi-analyticalMonteCarlo(SMC)simulationwasdevelopedtosimulatethepropagationoflaser-inducedfluo-rescence(LIF)inanopticallyparticipatingspray,whichsimultaneouslyexhibitsspectrallydependentemission,anisotropicscattering,absorption,andre-emission.TheSMCsimulationisdescribedandthenappliedtoanexperimentalconfigurationofacloudofpolydispersedropletscomposedofwaterandsulforhodamineBdye.IntheSMCsimulation,thecollectedLIFfluxontheremotereceptorelementiscalculatedastheglobalcontributionfromtheemissivesource,single,twice,…andnthcollisioneventsinanysequence.Theeffectsonthefluorescencephotonspropagationofsprayparameterslikethedyeconcentration,dropletsconcentration,anddropletssizeareexamined.Threespectralbandsrepresentingdifferentopticalpropertiesarechosentoanalyzetheinterferenceofabsorption,scatteringandre-emissiononthedetectedLIFflux.TheobtainedspectralLIFfluxdistributiononthereceptordemonstratesa“redshift”phenomenon.

简介：Inthisstudy,anelectro-mechanicalvalve(EMV)systemfortheintakevalveofafourstroke,singlecylinder,overheadvalveandsparkignition(SI)enginewasdesignedandconstructed.AnenginewiththeEMVsystemandastandardengineweretestedtoobservetheeffectsoftheEMVonengineperformanceandemissionsatdifferentspeedsunderfullload.TheEMVengineshowedimprovedenginepower,enginetorqueandbreakspecificfuelconsumption(BSFC).A66%decreaseinCOemissionswasalsoobtainedwiththeEMVsystem,buthydrocarbons(HC)andNOxemissionsincreasedby12%and13%respectively.

简介：Weusenondegeneratefour-wavemixingtostudythespatialresolutionofphotorefractivesemi-insulatingmulatiplequantumwellsgrownbymolecularbeamepitaxy.Byoptimizingtheexperimentalconditions,wehavedemonstratedthatoursamplehasspatialresolutionupto2.5μm,whichapproachesthetheoreticallimit.Wealsoanalysethefactorsthataffectthespatialresolutionofmultiplequantumwells.

简介：Metal-semiconductor-metalphotodetectorsonsemi-insulatingGaAswithinterdigitalelectrodesshowedsignificantenhancementinthespectralresponseinthenear-infraredregionastheelectrodespacingisreduced.Thephotocurrentforthedevicewith5μminterdigitalspacingisfiveordersofmagnitudehigherthanthedarkcurrent,andtheroomtemperaturedetectivityisontheorderof2.4×1012cmHz1∕2W-1at5Vbias.Furthermore,thespectralresponseofthisdevicepossessesstrongdependenceonthepolarizationofincidentlightshowingpotentialplasmoniceffectswithonlymicroscaledimensions.Theseexperimentaldatawereanalyzedusingopticalsimulationtoconfirmtheresponseofthedevices.

简介：

简介：WeproposeapromisingschemetodecelerateaCWmolecularbeambyusingared-detunedquasi-cwsemi-Gaussianlaserbeam(SGB).WestudythedynamicalprocessofthedecelerationforaCWdeuteratedammonia(ND3)molecularbeambyMonte-Carlosimulationmethod.OurstudyshowsthatwecanobtainaND3molecularbeamwitharelativeaveragekineticenergylossofabout10%andarelativeoutputmolecularnumberofmorethan90%byusingasinglequasi-cwSGBwithapowerof1.5kWandamaximumopticalwelldepthof7.33mK.

简介：Zhundong煤田是床气化被看作了完成它的干净、有效的利用的一个有希望的方法的世界范围、使流体化的最大的未经触动的煤田。这研究的目的是调查物理化学的性质和极其细小的半字符的气化反应，从凳子规模导出使流体化的床gasifier，用是的Zhundong煤燃料。获得的结果如下。与未加工的煤相比，碳和半字符的灰内容在部分气化以后增加，但是他们的灰熔化温度不显示出重要差别。特别地，在煤释放了到气体的feed的76.53%钠在使流体化的床气化以后分阶段执行。半字符的化学作文是仔细与它的粒子有关缩放，对多样的元素的显然不同的性质可归因。半字符展出更高的graphitization度，更高的赌注表面区域，和更富有的中央--并且macropores，哪个在优异气化反应的结果比煤字符。半字符的化学反应被增加的气化温度显著地改进，它在更高的温度建议半字符的气化的必要性。因而，在从使流体化的床gasifiers的半字符的这些碳为气化过程被回收并且再使用，将被认为可行。

简介：Electronscatteringfromsphericalpolyatomicmoleculesintheintermediateandhighenergyrangeisstudiedbyemployingthedevelopedsemi-empiricalformulaforelectronscatteringfromsimplediatomicmolecules.ThetotalcrosssectionsofelectronscatteringfromCF4andCC14areobtainedovertheincidentenergyrange30-5000eV.Thequantitativetotalcrosssectionsarecomparedwiththemeasurementsandwiththeothercalculationswhereveravailableincludingtheresultsderivedfromtheadditivityrulemodelandthecorrelatedopticalpotential[Chin.Phys.Left.21(2004)474],andgoodagreementisobtainedovertheincidentenergyrange30-5000eV.Itisshownthatthecalculationsderivedfromthesemi-empiricalformulaaremuchclosertothemeasurementsthanothercalculations.Finally,somequantitativeinformationofthesingleYukawapotentialisalsoobtained.

简介：导致激光的故障光谱学(解放)作为一种强大的分析技术被使用在新鲜植物样品分析踪迹元素。我们调查新鲜冬青叶子的LIBS系列并且观察在区域230-438nm从25个元素和分子射出的超过430根线。用于踪迹元素的半量的分析的解放上的激光波长的影响在植物样品满足被学习。结果证明紫外激光在植物样品为踪迹元素内容的半量的分析有更低的相对标准差和更好的重覆性。这个工作可能对改进解放的力量使用了种样品的定量分析有用。[从作者抽象]