简介:Nonlineardynamicalsystemsaresometimesundertheinfluenceofrandomfluctuations.Itisdesirabletoexaminepossiblebifurcationsforstochasticdynamicalsystemswhenaparametervaries.Acomputationalanalysisisconductedtoinvestigatebifurcationsofasimpledynamicalsystemundernon-Gaussianα-stableLévymotions,byexaminingthechangesinstationaryprobabilitydensityfunctionsforthesolutionorbitsofthisstochasticsystem.ThestationaryprobabilitydensityfunctionsareobtainedbysolvinganonlocalFokker-Planckequationnumerically.Thisallowsnumericallyinvestigatingphenomenologicalbifurcation,orP-bifurcation,forstochasticdifferentialequationswithnon-GaussianLévynoises.
简介:目的探讨L-肉碱及运动对超重小鼠心肌脂代谢的影响。方法C57BL/6小鼠给予3周高脂饮食建立超重模型,造模成功后的小鼠随机分为超重对照组(OC组)、超重肉碱组(OL组)、超重运动组(OE组)和超重运动结合肉碱组(OEL组)。OE和OEL组小鼠进行6周的游泳训练,6次/周;同时OL和OEL组小鼠补充L-肉碱。检测心肌H-FABP、PPARα蛋白表达量及FFA、肉碱含量。结果OL和OEL组心肌肉碱含量较OC组升高;OE和OEL组心肌FFA含量均低于OC组,且OEL组低于OE组;OE和OEL组心肌H-FABP表达量较OC组升高;干预各组心肌PPARα的表达量均高于OC组,且OEL组高于OE组。结论(1)有氧运动可上调心肌H-FABP和PPARα蛋白表达水平,促进心肌对FFA的氧化利用。(2)L-肉碱的补充对超重小鼠心肌H-FABP的蛋白表达无明显调控作用。(3)运动结合L-肉碱降低心肌FFA含量的效果优于单纯运动,其机制与上调PPARα蛋白表达有关。
简介:李一心汽车行业的老人,摄影圈子的新人.对于汽车尤其是Wagon倩有独钟.热爱把每辆车最炫的一面展现给大家全新途观L的外观设计风格相对于原先的途观有了很大的改变.原来的老途观L给人一种中庸温婉的感觉.而这一代全新途观L则偏向男性化的刚毅的外观线条,看上去更硬朗、更健硕.它的前脸用了很长的镀铬条,拉长视觉上的效果.大灯的上沿和下沿用了类似的镀铬条,与中网平齐,形成一个很长很扁的前脸.加上发动机盖上突出的肌肉感线条,形成的整个前脸非常有力量感.车侧面,首先轮圈的造型变得更简洁、更有力量感.顶配车型更是搭载19英寸轮毂,比起原先的途观更显霸气.侧面腰线从车头一直贯穿到车尾,门把手和腰线则完全平齐,更显简洁明了的设计理念.同样车尾的特点也非常突出.尾门的宽度和车尾宽度的比例进行了重新的调整,在拉宽后举门的同时,边框的冗余量变得更窄.这样的好处有两个,一是车变得更简洁、更好看,二是实用性大大地增加.可以说整个全新途观L在外观的设计上是下足了功夫,在延续德系车稳重的设计风格的同时,加入了许多出挑的设计风格,使车显得更时髦,更符合年轻人的口味.我想全新途观L应该会是大卖的一款车吧.
简介:InthispaperL^p-L^qestimatesforthesolutionu(x,t)tothefollowingperturbedhigh-erorderhyperbolicequationareconsidered,(ρπ--a△)(ρπ--b△)u+V(x)u=O,x∈R^n,n≥6,ρ1eu(x,O)=O,ρ^3eu(x,O)=f(x),(j=O,1,2).WeassumethattheotentialV(x)andtheinitialdataf(x)arecompactlysupported,andV(x)issufficientlysmall,thenthesolutionu(x,t)oftheaboveproblemsatisfiesthesameL^p-L^qestimatesasthatoftheunperturbedproblem.
简介:目的:比较研究单节段L4/L5椎间盘突出引起单纯单侧感觉或运动异常时突出髓核在MRI上的分布差异。方法回顾分析22例单节段L4/L5椎间盘突出并单侧单纯感觉或运动异常的患者的MRI影像资料,分为运动异常组(A组)和感觉异常组(B组),分别将2组突出髓核的的外侧缘、内侧缘、突出最顶点在横向位上赋值,将突出最顶点在矢状位上赋值,比较2组间赋值的差异。结果B组突出髓核的外侧缘及突出最顶点,突出髓核的最内侧缘较A组更偏向有症状侧,2组之间有明显差异,B组突出最顶点的矢状位赋值较A组的大。结论感觉异常患者较运动异常患者的突出髓核更偏向受压迫的神经根,且突出髓核在矢状位上更大。
简介:<正>InthispaperitisprovedthatforallcompletelydistributivelatticesL.thecategoryofL-fuzzifyingtopologicalspacescanbewmbeddedinthecategoryofL-topologicalspaces(stratifiedChang-Goguenspaces)asasimultaneouslybireflectiveandbicoreflectivefullsubcategory.
简介:WeconstructaclassofintegrablegeneralizationofTodamechanicswithlong-rangeinteractions.ThesesystemsareassociatedwiththeloopalgebrasL(Cr)andL(Dr)inthesensethattheirLaxmatricescanberealizedintermsofthec=0representationsoftheaffineLiealgebrasCr(1)andDr(1)andtheinteractionspatterninvolvedbearsthetypicalcharactersofthecorrespondingrootsystems.WepresenttheequationsofmotionandtheHamiltonianstructure.Thesegeneralizedsystemscanbeidentifiedunambiguouslybyspecifyingtheunderlyingloopalgebratogetherwithanorderedpairofintegers(n,m).Itturnsoutthatdifferentsystemsassociatedwiththesameunderlyingloopalgebrabutwithdifferentpairsofintegers(n1,m1)and(n2,m2)withn2<n1andm2<m1canberelatedbyanestedHamiltonianreductionprocedure.Forallnontrivialgeneralizations,theextracoordinatesbesidesthestandardTodavariablesarePoissonnon-commute,andwheneithernorm≥3,thePoissonstructurefortheextracoordinatevariablesbecomessomeLiealgebra(i.e.theextravariablesappearlinearlyontheright-handsideofthePoissonbrackets).Inthequantumcase,suchgeneralizationswillbecomesystemswithnoncommutativevariableswithoutspoilingtheintegrability.