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简介：Thispapercoutinuesthestudiesoftheessentialspectrumofnonsemi-boundedpseudodifferentialoperators.Theauthorimprovestheresultsin[5]insomesense.FortherelativisticSchrodingeroperator,√(-Δ+m^2)+v(x),completeresultsareobtained.

简介：Thispapergivesaspectrumexpressionwhichissimpleandhasaclearphysicalconceptionforpulsefrequencymodulationsignal,andhasbeenconfirmedbyanexperimentsimultaneously.

简介：LetMbeacompactminimalhypersurfaceofsphereSn+1(1).Let(M)beH(r)-torusofsphereSn+1(1).AssumetheyhavethesameconstantmeancurvatureH,theresultin[1]isthatifSpec0(M,g)=Spec0((M),g),thenfor3≤n≤6,r2≤n-1/norn≥6,r2≥n-1,thenMisisometricto(M).Weimprovedtheresultandprovethat:ifSpec0(M,g)=Spec0((M),g),thenMisisometricto(M).Generally,ifSpecp(M,g)=Specp((M),g),herepisfixedandsatisfiesthatn(n-1)≠6p(n-p),thenMisisometricto(M).

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简介：Asimplifiedmultisupportresponsespectrummethodispresented.Thestructuralresponseisasumoftwocomponentsofastructurewithafirstnaturalperiodlessthan2s.Thefirstcomponentisthepseudostaticresponsecausedbytheinconsistentmotionsofthestructuralsupports,andthesecondisthestructuraldynamicresponsetogroundmotionaccelerations.Thismethodisformallyconsistentwiththeclassicalresponsespectrummethod,andtheeffectsofmultisupportexcitationareconsideredforanymodalresponsespectrumormodalsuperposition.Iftheseismicinputsateachsupportarethesame,thesupportdisplacementscausedbythepseudostaticresponsebecomerigidbodydisplacements.Theresponsespectruminthecaseofmultisupportexcitationsthenreducestothatforuniformexcitations.Inotherwords,thismultisupportresponsespectrummethodisamodificationandextensionoftheexistingresponsespectrummethodunderuniformexcitation.Moreover,mostofthecoherencycoefficientsinthisformulationaresimplifiedbyapproximatingthegroundmotionexcitationaswhitenoise.Theresultsindicatethatthissimplificationcanreducethecalculationtimewhilemaintainingaccuracy.Furthermore,theinternalforcesobtainedbythemultisupportresponsespectrummethodarecomparedwiththoseproducedbythetraditionalresponsespectrummethodintwocasestudiesofexistinglong-spanstructures.Becausetheeffectsofinconsistentsupportdisplacementsarenotconsideredinthetraditionalresponsespectrummethod,thevaluesofinternalforcesnearthesupportsareunderestimated.Theseregionsareimportantpotentialfailurepointsanddeservespecialattentionintheseismicdesignofreticulatedstructures.

简介：ThesecondaryelectronsspectruminXPScanbeusedtodeterminetheworkfunctionofpolyaniline(PANI).ItisshownthattheworkfunctionofPANIdependsontheprotonationstateandthepolymerizationmethodused.

简介：Astaticapproachmethodmethodisusedtogetthespectrumexpressionofthepulseintervalmodulationsignal.Theexpressionissimple,hasaclearphysicalconceptandithasbeenconfirmedbyasimultaneousexperiment.

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简介：ＴｈｅｂｖａｌｕｅｓｐｅｃｔｒｕｍａｎｄηｖａｌｕｅｂｙｔｈｅｍｏｍｅｎｔｍｅｔｈｏｄＴｏｒｕＯｕｃｈｉ（大内）ＤｅｐａｒｔｍｅｎｔｏｆＥａｒｔｈＳｃｉｅｎｃｅｓ，ＦａｃｕｌｔｙｏｆＳｃｉｅｎｃｅ，ＫｏｂｅＵｎｉｖｅｒｓｉｔｙ，Ｋｏｂｅ，６５７，...

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简介：Ahybridtriplesystemofordervandindexλ,denotedbyHTS(v,λ),isapair(X,B)whereXisav-setandBisacollectionofcyclictriplesandtransitivetriplesonX,suchthateveryorderedpairofXbelongstoλtriplesofB.AnoverlargesetofdisjointHTS(v,λ),denotedbyOLHTS(v,λ),isacollection{(Y\{y},Ai)}i,suchthatYisa(v+1)-set,each(Y\{y},Ai)isanHTS(v,λ)andallAisformapartitionofallcyclictriplesandtransitivetriplesonY.Inthispaper,weshalldiscusstheexistenceproblemofOLHTS(v,λ)andgivethefollowingconclusion:thereexistsanOLHTS(v,λ)ifandonlyifλ=1,2,4,v≡0,1(mod3)andv≥4.

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简介：Inthispaper,asufficientandnecessaryconditionisobtainedtoensurethatthespectrumofaclassof2n-orderweighteddifferentialoperatorsisdiscrete.TheproofisbasedonthemethodofcertainweightedSobolevspacestobecompactlyembeddedinweightedL^2(R).

简介：不同于在行星的边界层的风骚乱光谱上的以前的研究，这调查集中于高高度(15km)在各种各样的天气下面的风精力光谱和骚乱光谱调节。快Fourier变换(快速傅里叶变换)被用来基于风介绍在高高度(15km)计算风精力和骚乱光谱密度雷达(WPR)大小。在在高高度的稳定的天气条件下面的骚乱光谱在2的一个频率范围以内在力量被表示吗？？

简介：Baiyuneboite-(Ce)isanewfluor-carbonatemineral.Basedonthefinedataonthestructureofthemineral,thefactorgroupandnormalcoordinateanalysesforitsinfraredspectrumhavebeencarriedout.ThefactorgroupanalysesindicatethatthesitegroupandfactorgroupsplittingsoftheinternalvibrationbandsofCO3^2-ionsdonotoccurandthatthedoublebandsofnormalmodesresultfromtwonon-equalsetsofCO3^2-ionsinthecrystalstructure,Thenormalcoordinateanalysesgivethestretchingforceconstants.bendforceconstantsandcalculatedfrequenciesofCO3^2-ions.Thecalculationsofpotentialenergydistributionallowustoassignv3andv4tothestretchingvibrationandthebendvibrationofCO3^2-ions.respectively.

简介：Weintroducefourtypesofspecialeigenvalueswhichlieontheboundaryofcertaininclusionregionsforthespectrumofacomplexsquarematrix,i.e.,R_r(G_c)-,O(a)-,B_r(B_c)-.andOB(a)-eigenvalues.Thenwecharacterizetheseeigenvaluesandtheircorrespondingeigenvectorsforirreduciblematrices,Finallywegivesomenewsufficientconditionsforanirreduciblecomplexmatrixtobenonsingular.

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简介：Thereisatypeofnodalsurfaceimposedbysymmetryonwavefunctions.Thesesurfacesarecrucialtotheorderingoflow-lyingstates.Basedonananalysisofthistypeofsurfaceandbasedonexistingtheoreticalresults,thefeatureofthelow-lyingspectrumoftheHe-tetramerisstudied,andthecandidatesofboundstatesandnarrowresonancesaresuggested.

简介：Schr的准确解决方案?相应于一个baryonic系统的dinger方程是对现在的工作的主要兴趣。我们考虑二次并且在潜在的关系的库仑术语。下次，在介绍一个准确答案以后，我们在地面和激动的状态计算了旋转和isospin效果。结果与试验性的数据是可比较的。