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简介：Thetitlecompounds4,4'-oxobis(propham)((?)n)(C20H24N2O5,Mr.=372.41)wassynthesizedbytheadditionreactionofcorresponding4,4'-oxobisphenyldiisocyanatewithisopropanol.ThecrystalstructurewasdeterminedbyX-raydiffractionmethod.Thecrystalistriclinicsystem,spacegroupP-1witha=8.5107(17),b=9.1164(18),c=14.5701(3)A,α=80.44(3),β=85.25(3),γ=62.88(3)°,V=992.2(3)A3,Z=2,Dc=1.247g/cm3,F(000)=396,R=0.0520,wR2=0.1434for4336observedreflectionswith[I>2σ(I)].X-rayana...

简介：RationalizationofIndustrialStructureisessentialcharacteristicofeconomicdevelopmentandkeytopromotesustained,stable,coordinatedeconomicdevelopmentaswell.BasedonGreyRelevancyDegree,thepaperistoanalyzeindustrystructureinWenzhou,China.Andgivetheevaluationforrationalizationofindustrialstructure.

简介：在这篇论文，以便预言厚球形的结构的剩余变丑，一个焊接程序基于Ansys用APDL语言被编译，一个焊接例子的一个数字焊接实验被执行。焊接的温度领域第一被模仿，然后，热结构的联合分析被执行，并且最后，在焊接以后的剩余压力和变丑被得到。在那以后，数字实验结果与物理实验相比是一个。数字模拟与物理实验适合很好的比较分析表演。根据那，厚球形的壳结构的一个三维的数字实验被执行在焊接期间得到应力的变化规则和厚球形的壳结构的变丑。研究具有到用机器制造的剩余变丑和高精确的预言的大价值。

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简介：Naturaladultagingisassociatedwithmanyfunctionalimpairmentsofthehumanneuromuscularsystem.Oneofthemoreobservablealterationsisthelossofcontractilemusclemass,termedsarcopenia.Thelossofmusclemassoccursprimarilyduetoaprogressivelossofviablemotorunits,andaccompanyingatrophyofremainingmusclefibers.Notonlydoesthelossofmusclemasscontributetoimpairedfunctioninoldage,butalterationsinfibertypeandmyosinheavychainisoformexpressionalsocontributetoweaker,slower,andlesspowerfulcontractingmuscles.Thisreviewwillfocusonmotorunitlossassociatedwithnaturaladultaging,age-relatedfatigability,andtheage-relateddifferencesinstrengthacrosscontractilemuscleactions.

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简介：LetAandBbeC^*-algebras,SupposethatKisthealgebraofallcompactoperatoraonaseperableHilbertspace,andαisanactiononthestablealgebraκ×AinducedbySU(∞).ItisprovedthatifAisα-invariantstableisomorphictoB1thenthereisa^*-isomorphismbetweenAandB.AnanalogousresultisobtainedbyconsideringOn×κ×Aintheplaceofκ×A,whereOnistheCuntsalgebra(3≤n<∞）。

简介：ＡＭＵＬＴＩＰＬＥＳＴＲＵＣＴＵＲＥＲＥＣＯＮＳＴＲＵＣＴＩＯＮＡＬＧＯＲＩＴＨＭＢＡＳＥＤＯＮＷＩＲＥＦＲＡＭＥＭＯＤＥＬＤｕＪｉａｎｇｃｈｕａｎＰａｕｌＷ．Ｆ．ＰｏｏｎＡｂｓｔｒａｃｔＡ“ＬＡＧ＆ＲＬＣ”ｖｉｓｕａｌｉｚａｔｉｏｎａｌｇｏｒｉｔｈ...

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简介：Theelectronicstructureof(001)polarsurfaceofcubiczirconiawasstudiedbyGGA(WC)approximation.Wefoundthecubiclatticenear(001)surfaceshowedanintensivetendencytotransfertotetragonallattice.Themetallicstateappearedonboththeterminations.ForO-termination,someO2pstateswerevacatedandholecarriersconcentratedonsurfaceoxygen-ions.ForZr-ermination,someZr4dstatesbecamepartialoccupiedforthelossofO2pstates.Weobservedtheholestatesweremainlylocalizedatthecorrespondingionsonsurfaceforboththeterminations,whilethechargestatesonZr-terminationweredispersedonsurface.

简介：Inthispaper,twoirreversibleexothermicautocatalyticreactionswhichcarryoutincontinuousstirredtankreactor（CSTR）areconsidered.Adifferential-algebraicsystemisappliedtomodelthesechemicalreactions.Thestabilityandthedynamicbehaviorarestudiedforthedifferential-algebraicsystem.TheHopfbifurcationappearswhentheparameterexceedsacriticalvalue.Inordertoeliminatethiscomplexbehavior,thedifferential-algebraicsystemisdescribedbyasingle-inputandsingle-outputsystemwithparametervaryingwithindefiniteintervals,andthenvariablestructurecontrolwithslidingmodebasedonaspecialpowerreachinglawisdesignedtostabilizethischemicalsystem.Numericalsimulationsaregiventoillustratetheeffectivenessofthemethod.

简介：在水下圆柱的壳结构被发现了一许多设计领域里的申请宽例如水兵的元素，给平台上油，等等。联合颤动分析是为这些的一个热问题在水下结构。颤动特征在水下结构不仅被水动力学压力而且由相应于不同的水深度的静水力学的压力影响。在这研究，一个声学的有限元素方法被用来评估在水下结构。以起始的压力僵硬考虑静水力学的压力，听觉的液体结构联合了分析在水下圆柱的壳被做了在自然频率和健全放射上学习水动力学压力的效果。由与频率基于Bessel功能由声学的有限元素方法并且由增加的集体方法获得了作比较，现在的分析的有效性被检查。最后，使硬的圆柱的壳的健全放射的测试样品被泛音获得声学的分析。结果证明静水力学的压力在与水深度决定健全放射变化的一个大沉没身体运动，和特征起一个重要作用。而且，分析方法和结果具有为另外的复杂海底的结构的研究的重要参考价值。

简介：聚合Mach-Zehnder肋骨波导的系统的分析基于计算和优化被介绍。模拟与有效索引方法(EIM)被执行并且二维(2-D)有限差别横梁繁殖方法(FD-BPM)。在连续聚合物层之间的大折射索引步被使用EIM减少，因此，计算的精确被保证。象Y连接角度和分离差距那样的波导的重要参数被讨论，他们与光力量繁殖和损失特征的关系在这篇论文被调查。优化结构的全部的损失是0.258dB。CLC数字TN252这个工程被基础为武器设备的进展研究节目支持，中国(资助No.02040105DZ02)。

简介：TheatomicandelectronicstructurestogetherwiththeopticalpropertiesofTiAuinthelow-temperatureB19andB11phasesarecalculatedbyusingfirstprincipleslocaldensityfunctionalapproaches.OurresultsshowthattheB11structureismorestablethanB19fortheTiAualloyinorderedequiatomiccomposition(Ti:Au=50:50).Atlowtemperatures,theB11structureshouldexistasabinaryalloyfromtheenergeticconsideration.Theaccurateatomicpositionsintheunitcellhavebeengivenbyfullyforcerelaxedcalculations.ThecalculatedopticalconductivitiesofB19andB11phasesshowadrasticchangeintheregionof1.5to3.5eV.

简介：Forourinvestigationwehave235measurementsdoneintheeastpartofDemocraticRepublicofCongobyP.HerrinckduringamagneticsurveyincludingthegrabenregionfromtheparalleljoiningGomacityandMahagicity,theregionbetweenAlbertandAkalakes,andtheroutefromAbatoKinsagani.Duringthesurveysthedensityofrecordingpointshasbeenselectedaccordingtotheimportanceofanomalies.Inthisway,theoffsetwas1kmwherethedisturbancewashighinGomacityand20kmhavebeensufficientalongtheroutefromAbatoKinsagani.Forthetopographicandisostaticreductionsonlyonecartographicdocumenthasbeenchosenthatwastheinternationalmapofthescale1/1000000whichpresentsacertaincharacteristicofhomogeneity.

简介：Abetterunderstandingofarecentlyraisedargumentonwhetherthereoccursastructurechangeduringyieldinghasbeenacquiredbyusingmolecularsimulation.Thatis,whenmonitoringthedisplacementsofallatomsbeforeandaftertheyield,astructuretransitiondoesoccur,whichisthe'atomicjump'thatcoordinatestheamountoftheatomsinthepolymerandmakesalargestepbeyond--0.05nmforallthoseatoms.Resultsindicatethatthecomplexofpolymerchainpackinginducesthemultipleatomicjumpsaroundtheyieldpoint.Thisexplainswhypolymershaveabroaderyieldingpeak.``