简介：这篇文章基于新组限制建议改进概括方面脑叶canceller(GSC)接收装置结构，它是合适的消除多重存取的干扰(MAI)，在直接顺序的代码部门的内部标志的干扰(ISI)多重存取(DS/CDMA)downlink多用户系统。新组限制被推出构造组窗帘适应多用户察觉者。分析显示在新限制下面的改进GSC不仅保留压制ISI并且取消从成功的有用信息为需要的用户咬了的MAI，而且罐头摘录的性质。模拟证明改进GSC过滤器能高效地取消MAI无线隧道长度是否短或长，并且比其它完成更好的性能，比较了过滤器。

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简介：Multi-cellmulti-usermultiple-inputmultiple-output(MC-MU-MIMO)isapromisingtechniquetoeliminateinter-userinterferenceandinter-cellcochannelinterferenceinwirelesstelecommunicationsystems.AsthelargenumberofusersinthesystemandthelimitednumberofsimultaneouslysupportableuserswithMC-MU-MIMO,itisnecessarytoselectasubsetofuserstomaximizethetotalthroughput.However,thefullycentralizeduserselectionalgorithmsusedinsinglecellsystem,whichwillincurhighcomplexityandbackhaulloadinmulti-cellcooperativeprocessing(MCP)systems,arenotsuitabletoMC-MU-MIMOsystems.ThisarticlepresentsatwocascadeduserselectionmethodforMCPsystemswithmulti-cellblockdiagonalization.Inthispaper,alocaloptimalsubsetofusers,whichcanmaximizethelocalsumcapacity,isfirstchosenbythegreedymethodineverycooperativebasestationinparallel.Then,allthecooperativebasestationsreporttheirlocaloptimaluserstothecentralunit(CU).Finally,theglobaloptimalusers,whichcanmaximizetheglobalsumcapacityofMCPsystems,areselectedfromtheaggregatedlocaloptimalusersattheCU.Thesimulationresultsshowthattheproposedmethodperformscloselytotheoptimalandcentralizedalgorithm.Meanwhile,thecomplexityandbackhaulloadarereduceddramatically.

简介：Aschemeisproposedtoelevatethelimitationofthegroundapplicationsystemofmono-satellite-sensorundertherequirementofremotesensingsatellitegroundapplicationsystem.Intheresource-sharing,forinstancecaculatingresource,asimplephototypeofcaculating-resourceisproposedthroughanalyzingresourceassignment,applicationassignment,bodystructure,andsoon.Inordertoimprovetheabilityofassignment,realizethefavorableutility,management,andmaintenance,thephototypeisimprovedbyusingdatagridcalculationaccordingtotherequirementandcharacterofactualapplication.Thephototypecanbetakenasthefoundationofcalculationframeofremotesensinggroundapplicationsystemofmulti-satelliteandmulti-sensor.

简介：In2005,Bao,etal.[Appl.Math.andComput.,vol.169,No.2,2005]showedthatTzeng,etal.’snonrepudiablethresholdmulti-proxymulti-signatureschemewithsharedverificationwasinsecure,andproposedanimprovedschemewithnoShareDistributionCenter(SDC).ThispapershowsthatBao,etal.’sschemesuffersfromtheproxyrelationshipinversionattackandforgeryattack,andpro-posesanimprovementofBao,etal.’sscheme.

简介：Toenhancetheexpressivepowerandthedeclarativeabilityofadeductivedatabase,variousCWA(ClosedWorldAssumption)formalizationsincludingthenaiveCWA,thegeneralizedCWAandthecarefulCWAareextendedtomulti-valuedlogics.Thebasicideaistoembedlogicformulasintosomepolynomialring.Theextensionscanbeappliedinauniformmannertoanyfinitelymulti-valuedlogics.Thereforetheyarealsoofcomputationalsignificance.

简介：Anewall-opticaldemultiplexerbasedonnonlineareffectinsemiconductorlaseramplifier(SLA)isproposed.ItcandemultiplexallchannelsoftheOTDMsignalconcurrently.anditcanalsobeintegratedonasinglechip.TheproposeddeviceconsistsofaseriesshortFabry-Perotamplifiers(FPSLA)settingonthepathverticsally,throughwhichthepreamplifiedopticalsignaltravels.Perpendicularlytothesignal,K(channelnumber)paralleledbeamsoflightpulse,whichactasprobeswithrepetitionatthebitrateofonechannel,irradiateontheseFP-SLAs,respectively,justwhenthecorrespondingsignalchannelpulsepassesthroughtheactiveregionfromlateralside.Thetransmissivitydependsonthesignalpulse.Theoreticalanalysishasbeengiven.Asademonstratingexample,Adeviceoperatedatthespeedof25Gbit/s(2.5Gbit/s×10)issimulatedandtheresultsshowthattheabout9.24dBextinctionratiocanbeachievedeasily.

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简介：Wepresentthesolidmodeleditdistance(SMED),apowerfulandflexibleparadigmforexploitingshapesimilaritiesamongstCADmodels.ItisdesignedtomeasurethemagnitudeofdistortionsbetweentwoCADmodelsinboundaryrepresentation(B-rep).Wegivetheformaldefinitionbyanalogywithgrapheditdistance,oneofthemostpopulargraphmatchingmethods.Toavoidtheexpensivecomputationalcostpotentiallycausedbyexactcomputation,anapproximateprocedurebasedonthealignmentoflocalstructuresetsisprovidedinaddition.Inordertoverifytheflexibility,wemakeintensiveinvestigationsonthreetypicalapplicationsinmanufacturingindustry,anddescribehowourmethodcanbeadaptedtomeetthevariousrequirements.Furthermore,amultilevelmethodisproposedtomakefurtherimprovementsofthepresentedalgorithmonbotheffectivenessandefficiency,inwhichthemodelsarehierarchicallysegmentedintotheconfigurationsoffeatures.ExperimentresultsshowthatSMEDservesasareasonablemeasurementofshapesimilarityforCADmodels,andtheproposedapproachprovidesremarkableperformanceonareal-worldCADmodeldatabase.

简介：Duetothefeaturesofthemulti-spectralimages,theresultwiththeusualmethodsbasedonthesupportvectormachine(SVM)andbinarytreeisnotsatisfactory.Inthispaper,afuzzySVMmulti-classclassifierwiththebinarytreeisproposedfortheclassificationofmulti-spectralimages.Theexperimentisconductedonamulti-spectralimagewith6bandswhichcontainsthreeclassesofterrains.Theexperimentalresultsshowthatthismethodcanimprovethesegmentationaccuracy.

简介：Themesonproductioninnucleon-nucleoncollisionsnearthresholdhasthepotentialtogaininformationonhadronpropertiesandalsoplaysanimportantroleinexploringthebaryonspectroscopy[1].Inrecentyears,theexperimentaldatabaseonthereactionofpp!ppK+Knearthresholdhasbeenexpandedsignificantly.Inadditiontothemeasurementsofthetotalanddifferentialcrosssections,belowthethresholdoftheproductionofthe?meson,performedexperimentallywithCOSY-11andANKEdetectorsatthecoolersynchrotronCOSYinGermany,invariantmassdistributionsofvarioussubsystemshavebeenobtainedatlowenergies.Unlikeabovethethresholdoftheproductionofthe?meson,inthelowenergyregion,wedonotneedtoseparatethenon-?fromthe?contribution,andduetothefactthatthedatawerespreadoverawiderangeofK+K??invariantmasses,ithasaspecialadvantagetoinvestigatethescalarmesonsa0(980)$andf0(980)whicharedynamicallygeneratedfromtheinteractionsofK￣K,ππ,andπηtreatedascoupledchannelsinI=0andI=1,respectively.BothofthemcouplestronglytotheK￣Kchannel.

简介：Inwirelesscellularnetworks,theinterferencealignment(IA)isapromisingtechniqueforinterferencemanagement.AnewIAschemefordownlinkcellularnetworkwithmulti-cellandmulti-userwasproposed.Intheproposedscheme,theinterferenceinthenetworksisdividedintointer-cellinterference(ICI)amongcellsandinter-userinterference(IUI)ineachcell.TheICIisalignedontoamulti-dimensionalsubspacebymultiplyingtheICIalignmentprecodingmatrixwhichisdesignedbythesingularvaluedecomposition(SVD)schemeatthebasestation(BS)side.ThealignedICIiseliminatedbytimingtheinterferencesuppressionmatrixwhichisdesignedbyzero-forcing(ZF)schemeattheuserequipment(UE)side.Meanwhile,theIUIisalignedbymultiplyingtheIUIalignmentprecodingmatrixwhichisdesignedbasedonNashbargainingsolution(NBS)ingametheory.TheNBSissolvedbytheparticleswarmoptimization(PSO)method.Simulationsshowthat,comparedwiththetraditionalZFIAscheme,theproposedschemecanobtainhigherdatarateandguaranteethedataratefairnessofUEswithlittleadditionalcomplexity.

简介：Thepseudoexcitationmethod(PEM)hasbeenimprovedintoamorepracticalform,onwhichtheanalyticformulaeofseismicresponsepowerspectraldensity(PSD)ofsimplifiedlarge-spanstructuralmodelshavebeenderived.TheanalyticformulaeandnumericalcomputingresultsofseismicresponsePSDhavebeenderivedtostudythemechanismofmulti-supportexcitationeffects,suchasthewave-passageeffectandincoherenceeffect,fortheseismicresponseofmultiandlarge-spanstructures.Byusingamulti-spantrussasanexample,theinfluenceofmulti-supportexcitationeffectsontheseismicresponseofsuchstructuresisstudied.

简介：Yinshananticlineistheproductoftectono-dynamicdeformation-metamorphism.Alongtheaxisoftheanticlineexistsabrittle-ductileshearingzonewhichobviouslycontrolstheore-formation.Mineralizationoccursalongtheaxisoftheanticlineinawidthofabout1000m.Intheminingarea,volca-no-subvolcanicrocksofEarlyYanshanperiodaredividedintothreecycles:Iintermediateacidicdacitelavaanddaciteporphyry;Ⅱacidicamphibolelipariteandquartzporphyry;Ⅲintermediateandesiteporphyrite.AmongthemactivitiesofⅠandⅡcyclesaremoreintensiveandareintimatelyrelatedtothemineralization.Yinshanoredepositistheresultofcombinativeprocessesoftectono-dynamicandvolcano—magmatichydrothermalfluids,sothattherearetwocentersofmetallogeniczoning,onebeingtheaxialstrainzoneofYinshananticlinewhichisthecenteroffirstorder,andtheotherbeingporphyrystock,2ndorder.

简介：Multi-functionaldendrometerisakindofforestrytoolthatcanmeasuremultiplefactorsofforest.Bycombiningsensortechnologyandcomputertechnology,adigitalmulti-functiondendrometerhasbeendeveloped,whichintegratedthefunctionsofmeasuringheight,distance,azimuth,slope,elevation,formquotientofanypartsofthestemintoonebodyatthesametest.Thedendrometercanfitthecomplexforestenvironment,solvethedifficultproblemsinaspectsofplantheight,measuredistance,centraldiameterandformquotientofbreastheight.Theaccuracycanmeettherequirementsofgeneralforestsurvey.

简介：NowadaysComputationalFluidDynamics(CFD)softwareisadoptedasadesignandanalysistoolinagreatnumberofengineeringfields.Wecansaythatsingle-physicsCFDhasbeensufficientlymaturedinthepracticalpointofview.ThemaintargetofexistingCFDsoftwareissingle-phaseflowssuchaswaterandair.However,manymulti-physicsproblemsexistinengineering.Mostofthemconsistofflowandotherphysics,andtheinteractionsbetweendifferentphysicsareveryimportant.Obviously,multi-physicsphenomenaarecriticalindevelopingmachinesandprocesses.Amulti-physicsphenomenonseemstobeverycomplex,anditissodifficulttobepredictedbyaddingotherphysicstoflowphenomenon.Therefore,multi-physicsCFDtechniquesarestillunderresearchanddevelopment.Thiswouldbecausedfromthefactsthatprocessingspeedofcurrentcomputersisnotfastenoughforconductingamulti-physicssimulation,andfurthermorephysicalmodelsexceptforflowphysicshavenotbeensuitablyestablished.Therefore,innearfuture,wehavetodevelopvariousphysicalmodelsandefficientCFDtechniques,inordertosuccessmulti-physicssimulationsinengineering.Inthepresentpaper,Iwilldescribethepresentstatesofmulti-physicsCFDsimulations,andthenshowsomenumericalresultssuchasiceaccretionandelectro-chemicalmachiningprocessofathree-dimensionalcompressorbladewhichwereobtainedinmylaboratory.Multi-physicsCFDsimulationswouldbeakeytechnologyinnearfuture.

简介：让n和k(n≥k>1)是二个非否定的整数。n顶点上的k-multi-hypertournament是对(V，一)，在V是有|V的一套顶点的地方|=n，和A是顶点的一套k元组，为V的任何k子集S叫了弧，A包含至少一个(至多k!)k！其条目属于S的k元组。为是某k-multi-hypertournament的外面度顺序(在里面度顺序)的非否定的整数的一个不减少的序列的必要、足够的条件被给。

简介：DNAcondensationisanimportantprocessinmanyfieldsincludinglifesciences,polymerphysics,andappliedtechnology.Inthenucleus,DNAiscondensedintochromosomes.Inpolymerphysics,DNAistreatedasasemi-flexiblemoleculeandapolyelectrolyte.Manyagents,includingmulti-valentcations,surfactants,andneutralpoorsolvents,cancauseDNAcondensation,alsoreferredtoascoil–globuletransition.Moreover,DNAcondensationhasbeenusedforextractionandgenedeliveryinappliedtechnology.ManyphysicaltheorieshavebeenpresentedtoelucidatethemechanismunderlyingDNAcondensation,includingthecounterioncorrelationtheory,theelectrostaticzippertheory,andthehydrationforcetheory.Recentlyseveralsingle-moleculestudieshavefocusedonDNAcondensation,sheddingnewlightonoldconcepts.Inthisdocument,themulti-fieldconceptsandtheoriesrelatedtoDNAcondensationareintroducedandclarifiedaswellastheadvancesandconsiderationsofsingle-moleculeDNAcondensationexperimentsareintroduced.

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简介：题目：一种多振子超声电机的设计目的：对超声电机而言，当多个压电振子并联时，由于以同一设计方案制作的电机振子往往具有不同的动态特性，因此会使得多振子电机的效率有所下降。即多振子电机工作的关键是如何使多个振子协同一致地驱动转子。为提高集成型多振子电机的效率和简化电机结构，提出一种构造贴片式多振子旋转超声电机的方法。创新点：1．提出圆周面内驱动的概念，发展已有的面内驱动概念（x-y面）；2．提出一种模态转换方法，通过多个振子弯曲振动的叠加形成设计电机的扭转振动；3．电机工作时，不仅各个振子处于共振状态，而且连接而成的定子同样处于共振状态，有利于提高电机的效率；4．验证多振子同步驱动的机理。方法：1．振子采用贴片式结构，由极化方向沿厚度方向的压电陶瓷和金属基体粘结而成；与使用兰杰文振子相比，使用贴片式振子易于简化电机的结构。2．各个振子首尾相连形成电机的定子，既可用于构造直线电机，又可转换成旋转电机。3．通过有限元方法对不同振子数构成的电机定子进行性能比较，并且分析设计电机的驱动机理；此外，通过仿真分析确定电机的最优尺寸。4．根据设计结果，加工原理样机，并且对加工的样机进行实验研究，探讨设计方法的可行性。结论：1．根据仿真分析结果，最终加工的电机定子包含5个振子。2．定子中各个振子的振动特性完全相同，振子同步工作。3．样机定子的内径为28mm，外径为35mm，高为30min；测得定子的纵振和扭转频率分别为44．42kHz和43．83kHz；当激励电压的频率为43．9kHz、峰值为100V时，电机的空载转速为45r／min，堵转力矩为0．3N·m，最大效率约为30％。4．本文所设计的电机，是一种多振子并行驱动的整体式电机，具有结构紧凑和多�