简介：Forthepurposeofsolvingoptimalcontrolproblemofawall-crawlingmobilerobotworkingonsphericalcontainers,weproposetheHamel'sformalismforPontryaginMaximumPrinciple,whichgivesageneralframeworkfortheoptimalcontrolofamechanicalsystemwithvelocityconstraints,especiallynonholonomicconstraints.Theeffectivenessoftheproposedframeworkisshownbythesimulationsfortheaboveproblem.

简介：我们数字模仿繁殖行为和由使用细胞的自动机方法的在活动个人的流行传播的人分发特点。模拟结果证明那在那里存在感染的率波动的批评价值振幅，流行罐头在整个人口在上面传播了。而且，与感染的率波动的价值振幅增加，同时，感染的人口的空间分发展出不规则的螺线波浪和集中现象的自发的形成不同人口的密度将与时间自动地震荡。而且，特点动态当时，清楚地并且稳定地成长时间和感染的率波动的价值振幅增加。感染的个人的最大的比例独立于波动的振幅率的价值，这也被发现，但是与人口密度线性地增加。

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简介：Sportsvideoappealstolargeaudiencesduetoitshighcommercialpotentials.Automaticallyextractingusefulsemanticinformationandgeneratinghighlightsummaryfromsportsvideotofacilitateusers'accessingrequirementsisanimportantproblem,especiallyintheforthcomingbroadbandmobilecommunicationandtheneedforuserstoaccesstheirmultimediainformationofinterestfromanywhereatanytimewiththeirmostconvenientdigitalequipments.Inthispaper,asystemtogeneratehighlightsummariesorientedformobileapplicationsisintroduced,whichincludeshighlightextractionandvideoadaptation.Inthissystem,severalhighlightextractiontechniquesareprovidedforfieldsportsvideoandracketsportsvideobyusingmulti-modalinformation.Toenhanceusers'viewingexperienceandsavebandwidth,3Danimationfromhighlightsegmentisalsogenerated.Asanimportantproceduretomakevideoanalysisresultsuniversallyapplicable,videotranscodingtechniquesareappliedtoadaptthevideoformobilecommunicationenvironmentanduserpreference.Experimentalresultsareencouragingandshowtheadvantageandfeasibilityofthesystemformultimediacontentpersonalization,enhancementandadaptationtomeetdifferentuserpreferenceandnetwork/devicerequirements.

简介：Thispaperreportsthedevelopmentandvalidationofanassayforthedeterminationofacetonitrileintherecycledmobilephaseusinghighperformanceliquidchromatography(HPLC).Themethodisbasedonthattheretentioninreversed-phaseliquidchromatographyincreaseswithdecreasingconcentrationoforganicphaseinthemobilephase.Thenaturallogarithmofthecapacityratioforagivensoluteislinearlyrelatedtothevolumefractionoftheorganicmodifierinthemobilephase.Fordimethylphthalateanddiethylphthalate,thelinearityrangeis30%―60%,andforbiphenylandterphenyl,therangeis60%―95%.Precisionvalues(RSD)wereboth<1%andtheaccuracy(RE)wasintherangeof±1%.Theassaywassuccessfullyappliedtothedeterminationofacetonitrileconcentrationofrecycledmobilephaseafterthedistillationofthecolumneluentinourlaboratory.

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简介：题目：水下板桩叶片对移动河床的影响研究　　目的：比较板桩叶片和简单的平板叶片在控制河床沉积物再分配时的效率。　　方法：1.在不受当地侵蚀现象影响的接近障碍物和下游区域的直线水道中研究河床的形态；2.使用不同的实验装置测试简单几何形状的平板叶片和复杂形状的603K叶片的性能；3.在不同的叶片迎角和浸没参数下，测试与其面积接近的结构和在远场中的河床形态。　　结论：1.叶片的形状和迎角影响其对河床形态所产生的作用，尤其是对于较大的淹没参数而言；2.平板叶片和板桩叶片对下游河床的重塑作用相似；3.随着迎角的增加，平板叶片将造成更深的冲刷孔。这可能归因于与平板叶片相关的马蹄形涡流增加的侵蚀能力，而板桩叶片的不均匀表面可减轻该涡旋的侵蚀强度。

简介：用非线性分析的方法讨论了方程N（t）=N（t）[a（t）-∑ni=1bi(t)Ni(t-τi（t）)]的周期正解的存在性，所获结果包含或推广了已有的几上结论[2，3]。

简介：Thispaperpresentstheproblemofcontrolofanti-aircraftmissilelaunchermountedonamovingcarrier-vehicle.Directexcitationsonthevehiclefromtheroadcauseadversevibrationsofthelauncher.Inordertoincreasetheprecisionoftheguidingsystemintheconditionsofself-propelledmovementofthesetuponabumpyroad,theadaptivecontrolalgorithmwasproposed.Someresearchresultsofcomputersimulationarepresentedinagraphicalform.

简介：Thenumericalmethodsformiscibledisplacmentinaggregatedorsorbingmediumareconsidered.Amixedfiniteelementmethodisadoptedforthepressureequation.Theconcentra-tioninthemobilewaterisapproximatedbyacombinationofaGalerkinfiniteelementmethodandthemethodofcharacteristicsandtheconcentrationinimmobilewaterisapproximatedbyastan-dardGalerkinmethod.Themovingmeshtechniquewhichdependsontimetisadoptedhere.Themovingmeshescanvaryindifferentspacialdomainswithdifferentvariabletimes.OptimaerrorestimatesinenergynormandL2normareobtainedundercertainconstraints.

简介：讨论了方程ｘ（ｔ）＝－ｘ＾３（ｔ－１）－ｘ＾３（ｔ－２）周期解的结构。

简介：让T是倾斜模块的Wakamatsu。模块M被叫(n，T)-copureinjective(分别地(n，T)-copure公寓)如果T1(N，M)=0(分别地1T(N，M)=0)为有T-injective尺寸的任何模块N至多n(看见定义2.2)。在这份报纸，M是，这被显示出(n，T)-copureinjective如果并且仅当M是核一我n(T)-precoverf：有刺T的B。另外，刺T朔望上的一些结果被介绍。例如，第n戳每个模块的T朔望，这被显示出，由T产生了，(n，T)-copureinjective。

简介：AgraphGiscalledchromatic-choosableifitschoicenumberisequaltoitschromaticnumber,namelych(G)=χ(G).Ohba’sconjecturestatesthateverygraphGwith2χ(G)+1orfewerverticesischromaticchoosable.ItisclearthatOhba’sconjectureistrueifandonlyifitistrueforcompletemultipartitegraphs.Recently,Kostochka,StiebitzandWoodallshowedthatOhba’sconjectureholdsforcompletemultipartitegraphswithpartitesizeatmostfive.Butthecompletemultipartitegraphswithnorestrictionontheirpartitesize,forwhichOhba’sconjecturehasbeenverifiedarenothingmorethanthegraphsKt+3,2*(k-t-1),1*tbyEnotomoetal.,andKt+2,3,2*(k-t-2),1*tfort≤4byShenetal..Inthispaper,usingtheconceptoff-choosable(orL0-size-choosable)ofgraphs,weshowthatOhba’sconjectureisalsotrueforthegraphsKt+2,3,2*(k-t-2),1*twhent≥5.Thus,Ohba’sconjectureistrueforgraphsKt+2,3,2*(k-t-2),1*tforallintegerst≥1.

简介：<正>Foranoddfunctionf(x)definedonlyonafiniteinterval,thispaperdealswiththeexistenceofperiodicsolutionsandthenumberofsimpleperiodicsolutionsofthedifferentialdelayequation(DDE)(?)(t)=-f(x(t-1)).Byuseofthemethodofqualitativeanalysiscombinedwiththeconstructingofspecialsolutionsaseriesofinterestingresultsareobtainedontheseproblems.

简介：Inthiswork,webrieflydiscussanovelclassofmodifiedgravitylikef(T,TG)gravity.Inthisbackground,weassumethenewagegraphicversionofpilgrimdarkenergyandreconstructf(T,TG)modelsfortwospecificvaluesofs.Wealsodiscusstheequationofstateparameter,squaredspeedofsoundandwDE-wDEplaneforthesereconstructedf(T,TG)models.Theequationofstateparameterprovidesphantom-likebehavioroftheuniverse.ThewDE-wDEplanealsocorrespondstoΛCDMlimit,thawingandfreezingregionsforbothmodels.

简介：Theoneplusone(1+1)modeofhydrosilationreactionofladderlikecis-isotaticpolyallylsilsesquioxane(AllyI-T)andpolyhydrosilsesquioxane(H-T)usingdicyclopentadienylplatinumdichloride(Cp2PtCl2)asthecatalystleadstotheformationofanewpolyorganosiloxane(POS).ThepresenceofnanoscaletubularstructureintheproductPOSwaspreliminarilyprovedbyIR,1H-NMR,differentialscanningcalorimetry(DSC),X-raydiffraction(XRD),gelpermeationchromatography(GPC),atomicforcemicroscopy(AFM)andmolecularsimulation.

简介：T网孔是允许T连接的矩形的网孔的本地修正。在T网孔上的花键涉及许多领域，例如有限元素方法，CAGD等等。一个花键空格的尺寸是为花键的理论和应用程序的一个基本问题。然而，决定自从它，一个花键空格的尺寸重重地是困难的问题取决于分区的几何性质。在许多情况中，尺寸是不稳定的。在这份报纸，我们由使用变光滑的cofactor-conformality方法在T网孔上在花键空格的尺寸学习不稳定性。在有T周期的T网孔上的花键空格的修改尺寸公式也被介绍。而且，一些例子被给在一些特殊网孔上在花键空格的尺寸说明不稳定性。[从作者抽象]

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简介：UsingthemethodofGirsanovtransformation,weestablishtheTalagrand'sT2-inequalityfordiffusiononthepathspaceC([0,N],R^d)withrespecttoauniformmetric,withtheconstantindependentofN.ThisimprovestheknownresultsfortheL2-metric.