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简介：Underinspirationfromthestructure-preservingpropertyofsymplecticdifferenceschemesforHamiltoniansystems,twohomogenizationconditionsforarepresentativeunitcelloftheperiodicalcompositesareproposed,oneconditionistheequivalenceofstrainenergy,andtheotheristhedeformationsimilarity.Basedonthesetwohomogenizationconditions,aneigenelementmethodispresented,whichischaracteristicofstructure-preservingproperty.Itfollowsfromthefrequencycomparisonsthattheeigenelementmethodismoreaccuratethanthestiffnessaveragemethodandthecomplianceaveragemethod.

简介：ThankstotheeffortsjointlymadebytheChinesebuyerandtheTechnopromexportasSeller,contractsonSuizhongandYiminpowerplantprojects,identifiedascounter-tradeprojectsintheSino-SovietLongTermTradeAgreement(1986-1990),weresignedonDecember27and30,1990re-spectively.

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简介：Onthebasisofthermalradiationfromsolidsurfacetomeaseuretem-perature,anewtwo-coloropticalfiberpyrometerisputforward.ItgetstwothermalradiationsignalsbythemethodofY-typeopticalfiberandnarrowbandfilterforindi-cationofthetemperature,SidiodeinusedforphotoelectricmeasurementandMCS-51single-chipmicrocomputerforsamplingandhandling.Thesystemcanoutputindigitalandcanprintoutinstantaneousvalue,peakvalueandvalley,Ithasmanyadvan-tagessuchasquickmeasurement,smallobjective,highprecision,highsensitivityandnon-emissivitycompensation.inaddition,thespecialcircuitofthispyrometerandthees-tablishmentofmathematicsmodelarediscussed.

简介：TwoGSSPs(GlobalStandardStratotypeSectionandPoint)fortheOrdovicianSystemwerededicatedinSwedenon25&26May2003.TheceremonieswerewellorganizedandwellattendedandincludednotonlytheunveilingofformalplaquesdescribingtheGSSPsbutalsothedrivingof“goldenspikes”.

简介：Thispaperpresentsanewboundaryintegralequatiònfortwo-dimensionalelasticitywiththestresscomponentσijtitjasoneoftheboundaryvalues,wheretiisthedirectioncosineofthetangentontheboundary.ThisformofBEMhasanadvantageinthatthestresscomponentσijtitjontheboundarycanbecalculateddirectlyfromthenumericalsolution.Thepresentformulationforplaneproblemsusestwokernels,theoneislogarithmicallysingularandtheotheris1/rsingular.Theeffectivenessoftheapproachisalsodiscussedthroughtestexamples.

简介：ThesimultaneousdiagonalizationbycongruenceofpairsofHermitianquatemionmatricesisdiscussed.Theproblemisreducedtoaparalleloneoncomplexmatricesbyusingthecomplexadjointmatrixrelatedtoeachquatemionmatrix.Itisprovedthatanytwosemi-positivedefiniteHermitianquatemionmatricescanbesimultaneouslydiagonalizedbycongruence.

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简介：IneverunderstoodwhymymomwasSostrictwithme.ItwasjustasifIwasbornonlyatoolforherbadtemper.

简介：Tosomeextent,China’ssecurityenvironmentdependsonifithasactivecreation,understanding,attentionandvigilanceonthecommoninterestsofthesurroundingareasandgroupsofstates,andifitcouldtaketimelyandpropercountermeasures.Inmypersonalview,twoprinciplesshouldbetakenintoconsideration.Thefirstprincipleisto

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简介：ThereisariverflowinginfrontofBainamVillageinDeqengTownofDarzeCounty.Becauseschools,infirmaries,supplyandmarketingcooperativesandmostofthefarmlandareallontheothersideoftheriver,anyonewhowantedaccesshadtoundertakeaninconvenient12-kindetour.Mattersbecameevenworseintherainyseason,whenthewaterlevelrose.

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简介：Twotypesofnewsubliminalchannelsareconstructedrespectivelybasedonprovablesecurepublickeycryptosystemsandidentityrecognitioninsomenetworkapplications.Researchshowsthattherearesomenewcharacteristicswhichareinfavorofcovertcommunicationinourconstructions.Itishardtomakethesubliminalchannelsfree,andthechannelshavelargecapacityandhightransmissionefficiency.Wealsopointoutthatthehardnesstomakethechannelsfreeisdisadvantageoustothewardenwhotriestothwartthecovertcommunication.

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简介：Superoxidedismutase(SOD)andascorbateperoxidase(APX)playcentralrolesinthepathwayforscavengingreactiveoxygenspeciesinplants,therebycontributingtothetoleranceagainstabioticstress.HerewereporttheresponsesofcytosolicSOD(cSOD;sodCc1andsodCc2)andcytosolicAPX(cAPX;OsAPX1andOsAPX2)genestooxidativeandabioticstressinrice.RNAblotanalysesrevealedthatmethylviologentreatmentcausedamoreprominentinductionofcAPXscomparedwithcSODs,andhydrogenperoxidet...