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简介：Onthebasisof10935broadbandvelocityrecordsof135earthquakes(ML3.0-6.4andepicentraldistanceof26-623km)occurredfromMay12toJune10in2008,whicharecollectedfrom27bedrockstationsincludedinSichuanEarthquakeMonitoringNetwork,thecorrespondingaccelerationrecordsareobtainedbyareal-timesimulationmethod.Thenbyregressionanalysisonthedata,therelationbetweenthepeakgroundaccelerationandvelocityattenuationofsmallandmoderatebedrockearthquakesoccurredinSichuanregionisacquired.AndtherelationisverifiedbyaM4.8earthquaketookplacerecentlyinWenchuan.Finally,theattenuationrelations,whicharecoincidenttothegeologicalconditionsinSi-chuanregion,areproposedbystudyingtherecordsfromSichuanearthquakenetwork.

简介：Manyreal-worldsystemscanbemodeledbyweightedsmall-worldnetworkswithhighclusteringcoefficients.Recentstudiesforrigorouslyanalyzingtheweightedspectraldistribution(WSD)havefocusedonunweightednetworkswithlowclusteringcoefficients.Inthispaper,werigorouslyanalyzetheWSDinadeterministicweightedscale-freesmall-worldnetworkmodelandfindthattheWSDgrowssublinearlywithincreasingnetworkorder(i.e.,thenumberofnodes)andprovidesasensitivediscriminationforeachinputofthismodel.ThisstudydemonstratesthatthescalingfeatureoftheWSDexistsintheweightednetworkmodelwhichhashighandorder-independentclusteringcoefficientsandreasonablepower-lawexponents.

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简介：1.IntroductionLetGbeafinitegroup.ForaCayleysubsetSofGnotcontainingtheidentityelement1,theCayley(di)graphX~Cay(G,S)ofGwithrespecttoSisdefinedasthedirectedgraphwithvertexsetV(X)=GandedgesetE(X)={(g,sg)IgEG,s6S}.IfS=S--’,thentheadjacencyrelationissymmet...

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简介：Thispaperpresentsahandheld3Dvision-basedscannerforsmallobjectsbyusingKinect.Itisdifferentfromthepreviouscolor-glove-basedapproacheswhichrequiresegmentingthetargetobject.First,weeliminatethenoisesandtheoutlierscausedbyholdinghands.Second,weapplyKinect-fusionalgorithmandtruncatedsigneddistancefunction(TSDF)torepresent3Dsurfaces.Third,weproposeamodifiedintegrationstrategytoeliminatethehandeffect.Fourth,wetakeadvantageoftheparallelcomputationofGPUsforreal-timeoperation.Themajorcontributionsofthispaperare(1)theregistrationprecisionisimproved,(2)theofflineamendmentandloopclosureoperationarenotrequired,and(3)concave3Dobjectreconstructionisfeasible.IndexTermsHandheld3Dscanning,Kinect-fusion,Truncatedsigneddistancefunction(TSDF).1.IntroductionRecently,thesensor-based3Dmodelreconstructionmethodshavebeenproposed[1].Thesensordeviceshavedifferentpropertiessothatthe3Dreconstructionalgorithmsvaryaccordingly.Thecommonlyusedsensordevicesaretime-of-flight(ToF)cameras[2]-[4],laserscanners[5],andstructuredlightscanners[6],[7].Lasershavegainedareputationforaccuracy;however,caremustbetakentouseeye-safelaserswhenoperatinginproximitytohumans.Foraninteractivesystem,thestructuredlightscannerwhichisbasicallyapassivevision-basedsensordeviceissuperiorbecauseitprovidesa2DdepthimageperframeandismoreaccuratethanthatofaToFcamera.Here,wepresentareal-time3DscannerusingthedepthimagescapturedbyKinect.

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简介：SponsoredbytheUNandChina,HangzhouRegionalCenterforSHP(HRC)aimsatpromotingtheSHPdevelopmentintheworld.ChinahasmostSHPstationsandhasgainedmuchexperienceinSHPdevelopment.InordertodisseminateSHPteehnology,HRChasalreadyheldwithsuccess34trainingworkshopsfor580participantsfrom60countries.

简介：Asetofsmall-stencilnewPadeschemeswiththesamedenominatorarepresentedtosolvehigh-ordernonlinearevolutionequations.Usingthisscheme,thefourth-orderprecisioncannotonlybekept,butalsothefinalthree-diagonaldiscretesystemsaresolvedbysimpleDoolittlemethods,orODEsystemsbyRunge-Kuttatechnique.Numericalsamplesshowthattheschemesareverysatisfactory.Andtheadvantageoftheschemesisveryclearcomparedtootherfinitedifferenceschemes.

简介：-BasedontheextendedMorisonEquationandmodeltests,thein-lineforcesonsmallsquarecylinderscausedbywaves(regularandirregular)andcurrentsareanalyzedindetailinthispaper.ThehydrodynamiccoefficientCDandCurelatedtoKCnumberandtheeffectofdirectionofwaveincidencearealsogiven,whichcanbeusedinengineeringpractice.

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简介：假定G是有最大的度的一张平面图。在它被证明那G的这份报纸是全部的--(+2)-choosable如果(1)7并且G没有邻近的三角形(即，没有二个三角形是有一个普通的边的事件)；或(2)6并且G没有交叉三角形(即，没有二个三角形是有一个普通顶点的事件)；或(3)5，G没有邻近的三角形，G没为某整数k有k周期{5，6}。

简介：Atheoreticalstudywasconductedtocharacterizehydraulicjumpoflaminarcircularliquidjets.Theobjectiveofthisresearchwastodeterminethejumplocationinasimpleexplicitform,Theeffectsofmanyfactorswereinvestigatedincludingnozzlediameter,jetexitpressure,nozzle-to-platespacing,jetvelocityandReynoldsnumber,ItwasfoundthatthetheoreticaldatacollapsedwellovertherangeofjetReynoldsnumber500≤Re≤1800withpreviousdata.

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简介：Tworecentstudieshavediscoveredasurprisinglinkbetweenthreeseeminglydifferentclinicaldiseases:onethatdestroysbonemarrow,anotherthatpreventssundamagefrombeingrepaired,andathirdwhichcauseschildrentoshowsignsofagingextremelyearly.Ithasbeenfoundthatallthreediseasesarecausedbymutationsinthesamegene.Mutationscomeinanumberofdifferentflavors,