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1.
IntroductionAsearlyas1895,Blackstudiedthephysicalbehaviorofhumanteeth[1].Since1950thestudies Fig.1onmechanicalpropertiesofhumanteethhaveappearedinjournalsandmagazinessuccessively[2~13].Humanteethareverysmallandthespecimensusedfortestingareevensmaller…  相似文献   

2.
TheXORfunctionismod_2sumofproductalgebraical.Itisbecomingincreasinglyattractiveduetotheiradvantagesofsmallercircuitareaonachipandbeingmucheasiertotest[1].An_variableXORfunction:f(xn,xn-1,…,x1)canbeexpressedwiththemod_2expansionas[2]:f(xn,xn-1,…,x1)=∑…  相似文献   

3.
Itiswell_knownthatthetheoryofmonotonesequenceandfixedpointsinorderedBanachspaceisanimportanttoolforinvestigatingthenonlinearproblem.Utilizingthistool,continuityandcompactnessareusuallyassumed(see[1~3]).Recently,withoutthesupposeofcontinuity,theexiste…  相似文献   

4.
Someengineeringproblemscanbeexpressedbysuchasystemoflinearnon_homogeneousdifferentialequationsasL1[u1(q)]=F1(q),L2[u2(q)]=F2(q)+f2[u1(q)],…Ln[un(q)]=Fn(q)+fn[u1(q),u2(q),…,un-1(q)],(1)andtheirinitialandboundaryconditions,whereqisthesetofallargumentsw…  相似文献   

5.
IntroductionThispaperisconcernedwiththenumericalsolution ,byfinitedifferencemethod ,ofthefollowingsingularlyperturbednonlocalboundaryvalueproblem :Lu≡-εu″ +a(x)u=f(x)   ( 0 <x<l) ,( 1 )L0 u≡-εu′( 0 ) +γu( 0 ) =μ0 , ( 2 )L1u≡u(l) -δu(d) =μl   ( 0 <d<l) ,( 3 )whereεisasmallpositiveparameter,…  相似文献   

6.
Finite element analysis of wave propagation in fluid-saturated porous media   总被引:2,自引:0,他引:2  
Thedynamictransientresponseanalysisofporousmediaplaysaveryimportantroleinalotofengineeringpracticessuchastransientconsolidation,noisecontrol,earthquakeengineeringandbioengineering.Biot[1]originallydiscussedthewavepropagationprobleminfluid_saturatedpo…  相似文献   

7.
IntroductionForaparticlemovingwithhighvelocitynearthatoflightcitsmomentumwasobtainedbyRef.[1]usingLaurentseriestoexpand|v/c|<...  相似文献   

8.
Thedifferentialquadraturemethod(DQM)proposedbyR.Bellman[1,2]hasbeensuccessfullyemployedinnumericalcomputationsofproblemsinengineeringandphysicalscience.BecausetheinformationonallgridpointsisusedtofitthederivativesatgridpointsintheDQM,itisenoughtoobta…  相似文献   

9.
Stability of a class of neural network models with delay   总被引:6,自引:0,他引:6  
IntroductionRecently,theoreticalandapliedstudiesofneuralnetworkmodelhavebenthenewfocusofstudiesintheworld.Itiswel_knownthatqu...  相似文献   

10.
On star product fractal surfaces and their dimensions   总被引:3,自引:0,他引:3  
Generallyspeaking,fracturesurfacesofmaterialsarerough,irregularandrandom.Thefractureandweaknessinrock,concrete,ceramicsandmetalsignificantlyaffectthedeformation,strength,andconductivityofthesematerials.Manypaper(suchas[1~3])focusedonthefracturesurfa…  相似文献   

11.
Itisinrecentyearsthatthedamagemechanicsissuccessfulinstudyingthefatigueproblems.Thekeytothismethodistodefineanappropriatedamagevariablewhichhasaclearphysicalmeaningandshouldbemeasuredbyasimpleexperimentalprocedure,andthevariablecanbeusedtoestablished…  相似文献   

12.
IntroductionParametricalyexcitedvibrationshavebenextensivelyappliedtoinengineringsystems[1],suchasthevibrationofmachines,dyna...  相似文献   

13.
IntroductionInseveralpreviouspapers[1,2,3],Eringendiscussedthestateofstressnearthetipofasharplinecrackinanelasticplatesubjecttouniformtension,shearandanti_planeshear.Thefieldequationsemployedinthesolutionoftheseproblemsarethoseofthetheoryofnon_locale…  相似文献   

14.
Wehavediscussedconceptofequationwithn_turningpointsinmypaper[1],i.e.,asecondorderlinearordinarydifferentialequationd2ydx2+[λ2q1(x)+λq2(x,λ)]y=0,whereq1(x)=(x-μ1)(x-μ2)…(x-μn)f(x),f(x)≠0,andλisalargeparameter.Althroughthefirsttermoftheasymptoticexpan…  相似文献   

15.
IntroductionItiswell_knownthatthereexiststheargumentbetweenAtkinson(see[1~4])andEringenandco_workers(see[5~7])overthenon_loca...  相似文献   

16.
IntroductionIn[1],theseriessolutionsofthecircularplatewithhingededgeandwiththesimplysupportededgehasyetbenconstructed,whicha...  相似文献   

17.
IntroductionUptonow,therehavebenmanyresearchesontheplaneweldingproblemofisotropicmaterials.e.g.[1]and[2]etc.However,forthepla...  相似文献   

18.
Thesystematicstudyofmodelingchaotictimeseriesisarelativelynewresearchtopicoriginatinginthe1980s.Oneimportantreasonforthisisthatlineartechniques[1~3]suchasARmodels,AROMAmodelsandARMAVmodelsetc.,solongdominantwithappliedmathematicsandnaturalsciences,…  相似文献   

19.
IntroductionAsageneralizationoftheclasicalfieldtheory,nonlocalfieldtheorycanbeusedasthetheoreticalbaseinmacro_micromechanicsb...  相似文献   

20.
IntroductionTheconventionalpassiveconstrainedlayerdamping(PCLD)treatmentshavebeenextensivelyutilizedasasimpleandreliablemeansfordampingoutthevibrationofvariousstructures(MeadandMarkus1969[1],Y.K.Cheung1972[2],JohnsonandKienholz1982[3],CupialandNiziol…  相似文献   

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