简介：在这份报纸，有合并Crowley燕子的二分布式的细胞内部的延期的一个HIV动力学模型功能的反应感染率被调查。作者在我们的系统考虑多重阶段疾病传播和隐而不见地的感染的房间(还没生产的病毒)。作者考虑nonnegativity，解决方案的固定，和系统的全球asymptotic稳定性。由构造合适的Lyapunovfunctionals并且使用Lyapunov-LaSalle不变性原则，作者证明全球稳定性感染(地方性)为时间延期的平衡和diseasefree平衡。作者证明了如果基本繁殖数字R0是不到统一，那么，没有疾病的平衡是全球性asymptotically稳定，并且如果R0比统一大，那么，感染的平衡是全球性asymptotically稳定。结果获得了模型的全球动态行为被基本繁殖数字R0完全决定并且时间延期不影响模型的全球asymptotic性质的表演。

简介：ThemainpurposeofthispaperistostudyaproblemrelatedtoGolomb'sconjectures,andgiveaninterestingasymptoticformula.

简介：Inthispaper,theasymptoticbehaviorofthreetypesofpopulationmodelswithdelaysanddiffusionisstudied.ThefirstrepresentsonespeciesgrowthinthepatchΩandperiodicenvironmentandwithdelaysrecruitment,thesecondmodelsasinglespeciesdispersalamongthempatchesofaheterogeneousenvironment,andthethirdmodelsthespreadofbacterialinfections.Sufficientconditionsfortheglobalattractivityofperiodicsolutionareobtainedbythemethodofmonotonetheoryandstronglyconcaveoperators.Someearlierresultsareextendedtopopulationmodelswithdelaysanddiffusion.

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简介：我们的世界以指数的率一直在变化。由于这快速的生长，我们将被强迫以我们自己在环境而且在环境过例如设计在有增加的人口和成长复杂性的更大的和谐的未来的城市的方法做变化不仅。纸为选择最理想的城市在全球了解和全面标准和他们的优先级上包含两思考。

简介：1.IntroductionGopalsamyandLadajs[1]illtroducedthefollowingdelayLotka-Volterratypesinglespeciespopulationgrowthmodel:wherea,b,ctTarerealconstants,anda>0,c>0,T20.Ifa>0,b<0andc=0,then(1.1)reducestotheLogisticequation.Ifb>0,(l.1)exhibitstheso--calledAlic...

简介：Aformalpolicydevelopmentframework,basedonasystemofsystems(SoS)approach,issynthesizedtosystematicallyaddress,inanintegrativeandadaptivefashion,majorglobalchallenges,suchasthecurrentfoodandfinancialcrises,andtheirinteractionswithotherkeynatural,societal,andtechnologicalsystems.ASoSapproachseekstorespectthedifferentvaluesystemsofmultipleparticipants,toharnesscomplexitythrougheffectiveintegration,andtoengagetheworldofuncertaintyandunpredictabilitywithanadaptiveresponse.Facedwiththepresentglobalchallenges,whatisneededarestrategicandoperationalmethodswhichleadtoethicalpolicies,enhanceintegrativeandadaptivemanagementpractices,andareabletodirectconflictresolutioninapositivedirection.Policymakersneedtoolstomodelandanalyzecomplexsystemswhichtheyaretryingtoresponsiblygovern,takingintoaccountvaluesandriskstodesignandevaluatedifferentpolicies.ApreliminaryinvestigationintotheglobalfoodsystemisundertakentounderstandtheSoSandtoprovideinsightsonhowtocarryoutpolicydevelopmentusingtheproposedframework.

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简介：InthispapertheWilsonnonconformingfiniteelementisemployedtosolveSobolevandviscoelasticitytypeequations.Bymeansofpost-processingtechnique,globalsuperconvergenceestimatesareobtainedforquasi-uniformrectangularmeshes.Finally,anerrorcorrectionschemeispresented.

简介：Inthispaper,weprovetheglobalexistenceanduniquenessofnon-negativeclassicalsolutionsoftheSmoluchowskiequationwithviscosityε>0.Theexistenceofweaksolutionswhenε=0isalsoobtained.

简介：摘 要：有效的野外调查路线规划为开展有效的野外调查工作具有重要的意义，而野外调查路线的规划需要有地形图为支撑。本文以陕南某项目选址勘察野外活动为例，选用公开的遥感数据为数据源作源，利用Global Mapper、MapGIS等软件进行地形数据的生成、编辑、处理以及成图，探讨ASTER GDEM高程数据制作野外调查工作地形图的方法，并分析了应用中应注意的问题。

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简介：Wedeveloptheinterpolatedfiniteelementmethodtosolvesecond-orderhy-perbolicequations.Thestandardlinearfiniteelementsolutionisusedtogenerateanewsolutionbyquadraticinterpolationoveradjacentelements.Weprovethatthisinterpo-latedfiniteelementsolutionhassuperconvergence.Thismethodcaneasilybeappliedtogeneratingmoreaccurategradienteitherlocallyorglobally,dependingontheapplications.Thismethodisalsocompletelyvectorizableandparallelizabletotaketheadvantagesofmoderncomputerstructures.Severalnumericalexamplesarepresentedtoconfirmourtheoreticalanalysis.

简介：一家全球企业必须连续地改进在供应链合作者之间的逻辑操作的效率。在供应链集成逻辑服务，资源，和必要信息流动保证效率和功效对这些公司极其重要。全球逻辑服务公司从他们的顾客面对挑战提供合算的逻辑服务，精确，并且无缝地集成材料，信息和现金流动。在这研究，为包罗一切的逻辑服务的一个改进框架系统地被设计，分析，并且评估。包罗一切的逻辑服务框架，在四定义模型，被开发在全球供应链上下文以内向企业提供综合、全面的服务。服务重要性的层次用四张范畴问询表被估计。这研究在分发工业提供包罗一切的逻辑服务的实现的案例研究并且表明在不同需求条件下面操作的框架。最后，系统动力学原因的评估被用来评估逻辑服务框架的优点。

简介：Thepaperintroducesthebusiness-basedinterorganizationalinformationplatform(IOP)andanalyzesthefeasibilityandmechanismofbusiness-basedIOPgoverningglobalsupplychainsvulnerability,andthenaimstodevelopariskevaluationsoftwareunderreliablealgorithmtoappraisethecapabilityofaninterorganizationalinformationplatformresistingtoglobalsupplychainsrisksthatsupportsplatformusersandproviderstomakedecisions.Thepaperrespectivelystartswithabasicconceptualmodelofglobalsupplychainsvulnerabilityandaconceptualmodelofglobalsupplychainsvulnerabilityinbusiness-basedIOP,andthengivesthesimulationmodelofgovernanceofglobalsupplychainvulnerabilityinbusiness-basedIOP;thenhasadiscussionwiththebeneficialmodelofgoverningglobalsupplychainsvulnerabilitybyusingbusiness-basedIOPornot.Theresultsofresearch:(1)Ifgiventheratioofexpenseperincomeonglobalsupplychainsusingbusiness-basedIOP,wecanestimatethecoststotakeprecautionsagainstrisksthatdecidestothemaximumvalueoftheaverageincomeofpertransactiononglobalsupplychainsusingbusiness-basedIOP.(2)Ifgiventotalincomeoftransactiononglobalsupplychainsusingbusiness-basedIOP,wecanestimatethemaximumvalueoftheratioofexpenseperincomeonglobalsupplychainsusingbusiness-basedIOP,whichwouldhelptomakepricingpolicyforIOPserviceprovider.

简介：InthispapermethodsofdifferentialinequalitiesandLiapunovfunctionalsforprovingtheglobalstabilityofconstantequilibriaofreaction-diffusionsystemsaregiven,andexamplesforshowinghowtousethesemethodsarealsogiven.

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