简介:这篇论文为3D在一张无穷地长圆柱的嘴在亚声的流动的全球存在和稳定性上涉及这个问题稳定的潜在的流动方程。如此的一个问题被Courant-Friedrichs显示在[8,p。377]:通过管的流动应该是被考虑一稳定,isentropic,无旋与圆柱的对称流动并且应该由与适当边界条件解决3D潜力流动方程坚定。由介绍一些合适加权的H?lder空格并且建立priori估计,当在否定无穷的亚声的流动的国家被给时,作者在一张3D嘴证明亚声的潜在的流动的全球存在和稳定性。关键词亚声的流动-潜在的流动方程-Bessel功能-加权的H?lder空格-全球存在2000苏布杰克特先生分类35L70-35L65-35L67-国家Basic支持的76N15工程中国(号码2006CB805902)的研究节目,中国(号码10871096)的国家自然科学基础和为江苏大学的先进才能的研究基础。
简介:TheexistenceandorbitalinstabilityofstandingwavesforthegeneralizedthreedimensionalnonlocalnonlinearSchr¨odingerequationsisstudied.Bydefiningsomesuitablefunctionalsandaconstrainedvariationalproblem,wefirstestablishtheexistenceofstandingwaves,whichrelysontheinnerstructureoftheequationsunderconsiderationtoovercomethedrawbackthatnonlocaltermsviolatethespace-scaleinvariance.Wethenshowtheorbitalinstabilityofstandingwaves.Theargumentsdependupontheconservationlawsofthemassandoftheenergy.
简介:Inordertoimprovethecarsalesservice4Sshopmanagementlevel,improvetheeconomicandsocialbenefitsofenterprises,incentivesareusedtoencouragetheirown4sshops.Inthispaper,throughouttherelatedanalysisofthequarterlyandannualawardsincentiveprograminlarge-scaledomesticautomobileenterprises,entropymethodwithMATLABsoftwareisappliedtoestablishthedimensionalfitfunction.Inthedataprocessing,themultiplelinearregressionfunctionintoLingosoftwareisemployedtogetthebestsolution;andClanguageisusedtorunthescreeningdataprogramthroughtheconsistencytestprograminthesensitivityanderroranalysis.Firstofall,considerthecompanytomaximizeprofitsandmaximizetheamountofcomplaintsinthestoretomaintainalowtarget;intermsofstaff,weshouldconsiderprovidingmoreincentivesforemployees;inthecustomer,theoverallsatisfaction,serviceAttitude,vehiclecleanlinessbasedshouldbeimproved.Andtwoprogramsforthemonthlyprofitandexcessprofitsofprogressiveincentivesshouldalsobeimproved.
简介:为有状态的纬-法律气体方程的isentropicmagnetohydrodynamics(MHD)的二维的海军司烧方程,纬鈮?1,并且无限的电的抵抗力,我们执行分类可能的所有的全球分析粘滞吃惊侧面。精确,我们证明旅行波浪颂诗关于属类的阶段肖像由二个休息点连接了由的任何一个组成一粘滞宽松的侧面否则四休息指,二僵绳和二个节点。在后者配置,它休息,点被侧面连接取决于粘性,和罐头的比率包含宽松,overcompressive,或undercompressive吃惊侧面。考虑同样三维的答案,undercompressive震动是宽松类型的(Alfven)飘动。为单原子、两价的盒子纬=5/3和纬=7/5,与为无磁性的气体的标准粘性比率,我们数字地发现节点被侧面由把僵绳连接到节点的宽松的侧面围住的overcompressive的一个家庭连接,没有undercompressive震动发生。我们执行显示这些,二维的吃惊介绍的所有是线性地并且非线性地稳定的系统的数字Evans功能分析,关于二维、三维的不安。为一样的煤气的常数,而是不同粘性比率,我们也调查undercompressive震动为出现的案例;这些数字地被看见也稳定,关于二维并且(在到附近的Riemann答案的集中的中立意义)三维的不安。
简介:Segmentationofthree-dimensional(3D)complicatedstructuresisofgreatimportanceformanyrealapplications.Inthisworkwecombinegraphcutminimizationmethodwithavariantofthelevelsetideafor3DsegmentationbasedontheMumford-Shahmodel.ComparedwiththetraditionalapproachforsolvingtheEuler-Lagrangeequationwedonotneedtosolveanypartialdifferentialequations.Instead,theminimumcutonaspecialdesignedgraphneedtobecomputed.Themethodistestedondatawithcomplicatedstructures.Itisratherstablewithrespecttoinitialvalueandthealgorithmisnearlyparameterfree.Experimentsshowthatitcansolvelargeproblemsmuchfasterthantraditionalapproaches.