简介:GeneralizedSteiriertriplesystems,GS(2,3,n,g),areequivalenttomaximumconstantweightcodesoveranalphabetofsizeg+1withdistance3andweight3inwhicheachcodewordhaslengthn.ThenecessaryconditionsfortheexistenceofaGS(2,3,n,g)are(n-1)g≡0(mod2),n(n-1)g2≡0(mod6),andn≥g+2.Thesenecessaryconditionsareshowntobesufficientbyseveralauthorsfor2≤g≤11.Inthispaper,threenewresultsareobtained.First,itisshownthatforanygiveng,g≡0(mod6)andg≥12,ifthereexistsaGS(2.3.n.g)foralln,g+2≤n≤7g+13.thenthenecessaryconditionsarealsosufficient.Next,itisalsoshownthatforanygiveng,g≡3(mod6)andg≥15,ifthereexistsaGS(2,3,n,g)foralln,n≡1(mod2)andg+2≤n≤7g+6,thenthenecessaryconditionsarealsosufficient.Finally,asanapplication,itisprovedthatthenecessaryconditionsfortheexistenceofaGS(2,3,n,g)arealsosufficientforg=12,15.
简介:Thispaperdescribesthereplacementofacontrollerforaprogrammableuniversalmachineforassembly(PUMA)512robotwithanewlydesignedPCbased(openarchitecture)controlleremployingareal-timedirectcontrolofsixjoints.TheoriginalstructureofthePUMArobotisretained.Thehardwareofthenewcontrollerincludessuchin-housedesignedpartsaspulsewidthmodulation(PWM)amplifiers,digitalandanalogcontrollers,I/Ocards,signalconditionercards,and16-bitA/DandD/Aboards.AnIntelPentiumIVindustrialcomputerisusedasthecentralcontroller.ThecontrolsoftwareisimplementedusingVC++programminglanguage.Thetrajectorytrackingperformanceofallsixjointsistestedatvaryingvelocities.ExperimentalresultsshowthatitisfeasibletoimplementthesuggestedopenarchitectureplatformforPUMA500seriesrobotsthroughthesoftwareroutinesrunningonaPC.Byassemblingcontrollerfromoff-the-shellhardwareandsoftwarecomponents,thebenefitsofreducedandimprovedrobustnesshavebeenrealized.
简介:利用PCR以实验室构建的原核重组表达质粒pProEX-OCIF为模板扩增得到N末端融合有6×His标签和rTEV蛋白酶识别序列的人破骨细胞形成抑制因子(OsteoclastogenesisInhibitoryFactor,简称OCIF)结构域D1~D6(简称OCIFm)编码基因片段;将其与pMD18-T连接,转化大肠杆菌TOP10,筛选得到阳性重组质粒pMD18-OCIFm,双酶切重组克隆质粒pMD18-OCIFm得到OCIFm基因片段;将其定向插入甲醇营养型酵母分泌表达载体pPIC9中,构建获得重组表达质粒pPIC9-OCIFm.测序验证后,以限制性内切酶SalⅠ线化,电穿孔转化酵母宿主菌GS115.筛选得到阳性表达菌株后,甲醇诱导表达4d,SDS-PAGE和Westernblot对表达情况进行分析和确认.所获得的OCIFm基因片段在甲醇营养型酵母中表达量占菌体总蛋白的30%以上.利用Ni-NTA树脂对表达产物进行一步亲和层析纯化.活性测定表明纯化的表达产物可诱导体外培养的成熟破骨细胞样细胞的凋亡.表达产物的生物学活性较利用原核表达系统明显提高.
简介:Inthispaper,wefirstdeterminetherelationsamongthebestboundsAandBoftheg-frame,theg-frameoperatorSandthepre-frameoperatorQandgiveanecessaryandsufficientconditionforag-framewithboundsAandBinacomplexHilbertspace.Wealsointroducethedefinitionofag-framesequenceandobtainanecessaryandsufficientconditionforag-framesequencewithboundsAandBinacomplexHilbertspace.Lastly,weconsiderthestabilityofag-framesequenceforacomplexHilbertspaceunderperturbation.
简介:TheZEUSexperimenthasmigrateditsreconstructionandanalysisfarmstoaPC-basedenvironment.Morethanoneyearofexperiencehasbeenacquiredwithsuccessfuloperationofananalysisfarmdesignedforseveralhundredusers.Speciallydesignedsoftwarehasbeenusedtoproveidefastandreliableaccesstolargeamountsofdata(30TBintotal),AftertheongoingupgradeoftheHERAluminosity,higherrequirementswillariseintermsofdatastoragecapacityandthroughputrate,Thenecessityofabiggerdiskcachehasledtoconsiderationofsolutionsbasedoncommoditytechnology,PC-basedfileserversarebeingtestedasacost-effectivestoragesystem,Inthisarticlewepresentthehardwareandsoftwaresolutionsdeplogyedanddiscusstheirperformance.scalabilityandmaintenanceissues.
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简介:6,9,11-Trihydroxy-6a,12a-dehydrorotenoid1(coccineoneB)wassynthesizedfrom2-hydroxybenzaldehyde2andphloroglucinol.
简介:A(k;g)-graphisak-regulargraphwithgirthg.A(k;g)-cageisa(k;g)-graphwiththeleastpossiblenumberofvertices.Letf(k;g)denotethenumberofverticesina(k;g)-cage.Thegirthpairofagraphgivesthelengthofashortestoddandashortestevencycle.Afc-regulargraphwithgirthpair(g,h)iscalleda(k;g,h)-graph.A(k;g,h)-cageisa(k;g,h)-graphwiththeleastpossiblenumberofvertices.Letf(k;g,h)denotethenumberofverticesina(k;g,h)-cage.Inthispaper,weprovethefollowingstrictinequalityf(k;h-1,h)
简介:In[1],ShenGuangyuconstructedseveralclassesofnewsimpleLiealgebrasofcharacteristic2,whicharecalledthevariationsofG2.Inthispaper,theauthorsinvestigatetheirderivationalgebras.ItisshownthatG2anditsvariationsallpossessuniquenondegenerateassociativeforms.TheauthorsalsofindsomenonsingularderivationsofViGfori=3,4,5,6,andtherebyconstructsomeleft-symmetricstructuresonViGfori=3,4,5,6.Someerrorsaboutthevariationsofsi(3,F)in[1]arecorrected.
简介:Thispaperprovesthat,underthehypothesisg(t,0,0)≡0andsomenaturalassumptions,thegeneratorgofabackwardstochasticdifferentialequationcanbeuniquelydeterminedbythecorrespondingg-expectationswithallterminalconditions.ThemainresultofthispaperalsoconfirmsandextendsPengShige'sconjecture.