简介：ThediscretedynamicsforcompetitionpopulationsofLotka-VolterratypemodeledasN1(t+1)=N1(t)exp[r1(1-N1-b12N2)],N2(t+1)=N2(t)exp[r2(1-N2-b21N1)]isconsideredinthepaper.Inthecaseofnon-persistencetheattractivebehaviorofmodelhasbeendiscussed.Especially,therearetwoattractivesetswhenbij>1,andtheattractivebehaviorsaremorecomplicatedthanthatofthecorrespondingcontinuousmodel.Theattractedregionsaregiven.Weprovethatthemodelisalsopersistentinthedegeneratecaseofbij=1.Inthepersistencecaseofbij<1,theexistenceanduniquenessfortwo-periodpointsofthemodelarestudiedatr1=r2.Theconditionforthemulti-pairoftwo-periodpointsisindicatedandtheirinfluencesonpopulationdynamicalbehaviorsareshown.

简介：SomeexponentialtyperepresentationformulasforC-semigroupsaregiveninBanachspace.Moreover,weobtainacorrespondingVoronovskaja-typeasymptoticformula.

简介：ThepaperdealswiththestronglydampednonlinearwaveequationofKirchhofftype.Theexistenceofaglobalattractorisprovenbyusingthedecomposition,andmoreover,thestructureoftheglobalattractorisestablished.Ourresultsimprovethepreviousresults.

简介：延期微分系统广泛地在许多不同的域里被使用。决定他们的equilibria的本地稳定性是重要的。为有延期依赖者参数的系统，equilibria的稳定性分析复杂、困难。在这篇论文，我们将与延期依赖者参数调查典型方程的一种类型的最终的稳定性。我们的结果证明有延期依赖者参数的典型方程可以是之一在之间最终稳定、最终不稳定、交替稳定、不稳定。Applyingour结果，最终的稳定性能经常直接被决定并且不必呼吁数学软件。二个例子在这篇论文被给。

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简介：块在特征0的域上介绍了Zassenhaus代数学的某些类似物。块类型的无限维的简单谎言代数学由徐构造了的nongraded能被看作块代数学的归纳。在这份报纸，我们为块的谎言代数学与复合一一般线性谎言代数学基于有限维的无法缩减的重量模块打的four-devivationnongraded在鈥減olynomials鈥?上以增加和区别操作员构造无法缩减的模块的一个家庭。我们也发现一些无法缩减的商模块从被获得的submodules的一个新系列。关键词无法缩减的模块-nongraded谎言代数学-块类型先生(2000)的nongraded谎言代数学使分类17B10遭到-17B65由中国(资助号码10701002)的国家自然科学基础支持了

简介：Inthispaper,exponentialtyperegressionmodeisareconsideredfromgeometricpointofview.Thestochasticexpansionsrelstingtotheestimatearederivedandareusedtostudyseveralasymptoticinferenceproblems.Thebiasesandthecovariancesrelatingtotheestimatemaybecalculatedbasedontheexpansions.TheinformationlossoftheestimateandalimittheoremconnectedwiththeobservedandexpectedFisherinformationsareobtainedintermsofthecurvatures.

简介：Inthispaper,thetwo-dimensionalMarcinkewiczintegralintroducedbySteinμ（f）（x）=(∫0x|∫|x-y|≤1|x-y|Ω（x-y）f（y）dy|2t-3dt)2isshowntobeofweaktype（1,1）andweightedweaktype（1,1）withrespecttopowerweight|x|"if-1<α<0,whereΩishomogeneousofdegree0.hasmeanvalue0andbelongstoLlog+L（S1）.

简介：Inthisarticle,theauthorsdiscussedtheboundarybehaviorfortheCauchy-typeintegralswithvaluesinaCliffordalgebra,obtainedsomeSochocki–PlemeljformulaeandPrivalov–MuskhelishvilitheoremsfortheCauchy-typeintegraltakenoverasmoothsurfacebyrathersimplemethod.

简介：TheproblemstudiedinthispaperishowtoestablishweightedestimatesofweaktypenearL~1forthoseoperatorsthatarenotofweaktype(1,1).

简介：VesselMonitoringSystem(VMS)providesanewopportunityforquantifiedfishingresearch.ManyapproacheshavebeenproposedtorecognizefishingactivitieswithVMStrajectoriesbasedonthetypesoffishingvessels.However,oneresearchproblemisstillcallingforsolutions,howtoidentifythefishingvesseltypebasedononlyVMStrajectories.ThisproblemisimportantbecauseitrequiresthefishingvesseltypeasapreliminarytorecognizefishingactivitiesfromVMStrajectories.Thispaperproposesfishingvesseltypeidentificationscheme(FVID)basedonlyonVMStrajectories.FVIDexploitsfeatureengineeringandmachinelearningschemesofXGBoostasitstwokeyblocksandclassifiesfishingvesselsintoninetypes.ThedatasetcontainsallthefishingvesseltrajectoriesintheEastChinaSeainMarch2017,including10031pre-registeredfishingvesselsand1350unregisteredvesselsofunknowntypes.Inordertoverifytypeidentificationaccuracy,wefirstconducta4-foldcross-validationonthetrajectoriesofregisteredfishingvessels.Theclassificationaccuracyis95.42%.WethenapplyFVIDtotheunregisteredfishingvesselstoidentifytheirtypes.Afterclassifyingtheunregisteredfishingvesseltypes,theirfishingactivitiesarefurtherrecognizedbasedupontheirtypes.Atlast,wecalculateandcomparethefishingdensitydistributionintheEastChinaSeabeforeandafterapplyingtheunregisteredfishingvessels,confirmingtheimportanceoftypeidentificationofunregisteredfishingvessels.

简介：Polymersupportedalkyldimethylbenzylammoniumchlorideresindisinfectantusedforthedisinfectionofdrinkingwaterhasbeensynthesized,anditsantibacterialactivitieshavebeendetermined,comparedwiththecommerciallyusedtriiodinedisinfectantresin.Theresindisinfectantwasgeneratedsuccessfullywhenusethecombinationofsurfaceactiveagentsandultrosonic.

简介：ＳｔｕｄｙｏｎａＮｅｗＴｙｐｅｏｆＡｌｌ－Ｓｏｌｉｄ－ＳｔａｔｅＲｅｆｅｒｅｎｃｅＥｌｅｃｔｒｏｄｅＣｈａｏＬｕｎＨＵＡＮＧ；ＪｕＪｉｅＲＥＮ；ＤａＦｅｎｇＸＵ（ＤｅｐａｒｔｍｅｎｔｏｆＰｈａｒｍａｃｙ，ＨｅｂｅｉＭｅｄｉｃａｌＵｎｉｖｅｒｓｉｔｙ，...

简介：Inthispaper,anewhybridcontroltechnique,basedonacombinationofbase-isolationandsemi-activevariablestiffness/dampinginasuperstructure,ispresented.Toillustratetheefficiencyoftheproposedcontrolsystem,modeltestsonamini-electromagneticshakingtableandanumericalsimulationwereperformed.Thetestandnumericalcalculationresultsindicatethatthisnewhybridcontrolmodewithadditionaldampingandsmalleradditionalstiffnesscanachieveabettercontrolefficiency.

简介：Inthispaper,wewillprovetheboundednessofHardytypeoperatorsHβ(x)andH*β(x)ofvariableorderβ(x)onHerzspacesKα(·)p(·),qandKα(·)p(·),q’whereα(·)andp(·)arebothvariable.

简介：Inthispaper,theauthorsstudytheboundednessoftheoperator[μΩ,b],thecommutatorgeneratedbyafunctionb∈Lipβ(Rn)(0＜β≤1)andtheMarcinkiewiczintegralsμΩ,ontheclassicalHardyspacesandtheHerz-typeHardyspacesinthecaseΩ∈Lipα(Sn-1)(0＜α≤1).

简介：Usingcarboxymethylchitosan(CM-CTS)assnakeresin,B-62resincrosslinkedbytriethylentetraamine(TETA)ascageresin,aseriesofnovelsnake-cagetyperesinweresynthesized.Suchfactorsasthebestsyntheticconditions,theswellingandregenerationproperties.andthesorptioncapactitiesoftheabovementionedresinsformetalionswereinvestigated.Theexperimentalresultsshowtheseresinshavegoodswellingpropertiesandmechanicalstability,anddonotrunoffinorganicandinorganicsolvents.ThesorptioncapactitiesofthemforCu^2+,Ni^2+,Zn^2+,andPb^2+were0.89,0.54,0.32,and0.22mmol/g,rspectively.

简介：TheU.S.spacestrategy,consistingofthenationalspacestrategyandthenationalsecurityspacestrategy,issubjecttoandservesthelargerU.S.NationalSecurityStrategy.Becausespacetechnologyandspaceprojectscanservebothmilitaryandcivilianpurposes,theU.S.nationalspacepolicyandspacemilitarystrategyarehighlyintertwined.Thestronglyassertive

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简介：Theconceptofconvextypefunctionisintroducedinthispaper,fromwhichakindofconvex-decompositionapproachisproposed.Asoneofapplicationsofthisapproach,theapproximationoftheconvextypefunctionbythepartialsumofitsFourierseriesisinvestigated.Moreover,theorderofapproximationisdescribedwiththe2thcontinuousmodulus.