简介：TheV^t-integralasdefinedin[2],whichiseqnivalenttoM^2-integrslasdefinedinTrigonometreseriesbyZygmundisusedtosumtrigonometricseiesin[1].Inthispaper,someconvergenttheoremsofV^2-integralareestablished.

简介：Ｒｏｔａｔｉｏｎ　ｉｎ　Ｒｅａｃｔｉｏｎ　１９Ｆ＋５１ＶＲｏｔａｔｉｏｎｉｎＲｅａｃｔｉｏｎ１９Ｆ＋５１Ｖ￥ＷａｎｇＱｉ；ＬｕＪｕｎ；ＸｕＨｕｓｈａｎ；ＬｉＳｏｎｇｌｉｎ；ＺｈｕＹｏｎｇｔａｉａｎｄＺｈａｎｇＹｕｈｕＩｎｄＬｓｓｉ...

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简介：Vanadiumalloys,especiallythatofV4Cr4Ti,aresupposedasthepromisingcandidatestructuralmaterialforfusionapplicationsfortheirgoodthermalproperties,hightemperaturestrengthandtheinherentlowactivationcharacteristics.However,inrecent

简介：Inthispaper,anoptimalV-cyclemultigridmethodforsomeconformingandnonconformingplateelementsareconstructed.Anewmethoddealingwithnonnestedmultigridmethodsispresented.

简介：TheevaluationofcreepdamagesofCr-Mo-Vsteelusedinthegasturbineofpowerplanthasbeencarriedoutusingtheline-focus-beam(LFB)acousticmicroscopy.Thevelocityofleakysurfaceacousticwave(LSAW)propagatednearthespecimensurfacewasusedforthequantitativeevaluations,whichwasmeasuredbyLFBacousticmicroscopyusingthev(z)curveanalysismethod.IthasbeenshownthatwiththeincreaseofcreepdamagefractionofmetalmaterialtheLSAWvelocitydecreasesobviously,whichsuggeststhepossibilityofnondestructiveandquantitativeevaluationsofcreeddamagesinmetalmaterialsbyacousticmicroscopy.

简介：在文献中,DNA序列曾被描述为一维游动和三维游动.对前者,一个游动对应于多个DNA序列;对后者,游动和DNA序列一一对应.我们发现在三维游动(xn,yn,zn)中,由xn,yn和zn中任意有序的两个给出的二维游动已经与DNA序列一一对应,且余下的一维游动由该二维游动完全决定.因此,二维游动似乎是描述DNA序列最合适的模型.4个碱基A,C,G和T共有4!=24个排序.每一个排序都给出DNA序列用二维游动的一种描述.两个游动(x'n,y'n)和(x"n,y"n)被看作是等价的,如果(x'n,y'n)=(εx"n,δy"n)或(εy"n,δx"n),这里ε=±1,且δ=±1.于是这24个类型的游动被分成三个等价类;它们的代表分别是(xn,yn),(yn,zn),和(xn,zn),这里(xn,yn,zn)正好是张和张的三维游动.

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简介：Therearemoreandmorecountriestoakeanefforttothestudiesofvanadiumalloyforfusionapplication.NIFSinJapanhasrecentlydevelopedan80kgheatV4Cr4Tialloy(NIFS-heat2)aftertheproductionofa500kgscaleV4Cr4TiinU.S.severalyearsago.PropertyevaluationofthealloyhasbeenputintoaninternationalcollaborationprogramunderthecoordinationofIEA(InternationalEnergyAgency).SWIPhasjoinedthecollabrationonthehydrogenembrittlementresistanceevaluationofthealloyt.

简介：Ti6Al4Visawidelyappliedinmedicalimplantssuchasbone,joint,andteethduetoitsexcellentmechanicalproperties,corrosionresistance,plasticityandthebiocompatibilityofthesurfaceoxide.However,thenativesurfaceoxidefilmisquitethin(about5nm)andtechniquessuchasmicroarcoxidation,plasmasprayedhydroxyapatitaeandplasmaimmersionionimplantationareusedtosynthesizethickersurfacetitaniumoxide.

简介：ThehigherorderasymptoticfieldsatthetipofasharpV-notchinapower-hardeningmaterialforplanestrainproblemofModeⅠarederived.Theorderhierarchyinpowersofrforvarioushardeningexponentsnandnotchanglesβisobtained.Theangulardistributionsofstressforseveralcasesareplotted.Theself-similaritybehaviorbetweenthehigherordertermsisnoticed.ItisfoundthatthetermswithhigherordercanbenegleetedfortheV-notchangleβ>45°.

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简介：设G是一个2—(v，11，1)设计的可解区传递但非旗传递自同构群，且G点一本原则，则v=p^n，G≤AГL(1，p^n)且p≠2。

简介：教学改革方兴未艾，本文阐述了作者所在的课题组在数学课程改革方面的一些思考、设想与实际探索。

简介：第9路已基本建成并投入试运行，现能输出脉宽2ns，能量1．5kJ的倍频激光，开始用作X光背光驱动源。

简介：LetD(v)dentethemaximumnumberofquintuplesofav-setofpointsXwiththepropertythateverypairofdistinctpointsofXoccursinatmostonequintuple,LetB(v)=[v(v-1)/4]/5],ItisshownisthispaperthatD(v)=B(v)forallv≡0(mod4)with2exceptionsand13possibleexceptions.

简介：利用微扰理论，研究一维区域运动的自由电子，在受到弱周期势场的作用，给出在这种周期势场中的一维电子能谱，并与自由电子的能谱作比较。

简介：采用自洽场离散变分Xa(SCC-DV-Xa)方法对纯V2O5及夹层V2O5的能带结构、态密度、键强度、电子集居数等进行了研究.结果表明，Li+引入V2O2层间的最佳位置是在双键氧之下(或之上)，且靠近层的中心位置，此时它与周围原子间的作用力非常微弱，并且材料的导电性增强，使夹层复合材料Li+注入/脱出具有很好的可逆性和较好的光学性质.

简介：Theadsorptionbehaviorofionicgoldontochelatingfibercontainingamidoximegroupswasinvestigated.ThechelatingfiberpresentshighadsorptioncapacityforionicgoldAu^3+（upto626mg/g,whenthecontentofamidoximegroupreaches7.59mmol/g),andpossessestheabilitytoreducetheAu^3+intometallicgold,Intheredoxprocess,theamidoximegroupisoxidizedintocarboxylgroup.