简介：Inthispaper,someteststatisticsOfKolmogorovtypeandCramervonMisestypebasedonprojectionpursuittechniqueareproposedfortestingthesphericityproblemofahigh-dimensionaldistribution.Thelimitingdistributionsoftheteststatisticsarederivedunderthenullhypothesis.TheasymptoticpropertiesofBootstrapapproximationareinvestigatedandthetailbehaviorsofthestatisticsarestudied.

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简介：Thispaperaddsanegativevelocityfeedbacktothedynamicalsystemoftwin-tailaircrafttosuppressthevibration.Thesystemisrepresentedbytwocoupledsecond-ordernonlineardifferentialequationshavingbothquadraticandcubicnonlinearities.Thesystemdescribesthevibrationofanaircrafttailsubjectedtobothmulti-harmonicandmulti-tunedexcitations.Themethodofmultipletimescaleperturbationisadoptedtosolvethenonlineardifferentialequationsandobtainapproximatesolutionsuptoth...

简介：Wefirstreportafabricationtechniqueofnanoscalespecklepatternsonpolymersusingbroadionbeammilling.Theproposedtechniqueissimpleandlow-costtoproducespecklesrangingfromdozensofnanometerstolessthanthreemicrometersinalargeareaofseveralmillimeters.Randompatternsweresuccessfullyproducedwithanargon(Ar)ionbeamonthesurfacesoffourkindsofpolymers:theepoxymatrixofcarbonfiberreinforcedplastic,polyester,polyvinylformal-acetal,andpolyimide.Thespecklemorphologiesslightlyvarywithdifferentpolymers.Thefabricatedspecklepatternshavegoodtimestabilityandarepromisingtobeusedtomeasurethenanoscaledeformationsofpolymersusingthedigitalimagecorrelationmethod.

简介：Lateralorganizationanddynamicsoflipidsinplasmamembranesarecrucialforseveralcellularprocessessuchassignaltransductionacrossthemembraneandstillremainelusive.Inthispaper,usingcoarse-grainedmoleculardynamicssimulation,wetheoreticallystudythecombinedeffectsofheadgroupchargeandtailunsaturationoflipidsonthelateralorganizationanddiffusionoflipidsinternarylipidbilayers.Inneutralternarylipidbilayerscomposedofsaturatedlipids,unsaturatedlipids,andcholesterols,undertheconditionsofgiventemperatureandcomponents,themainfactorforthephaseseparationistheunsaturationofunsaturatedlipidsandthebilayerscanbeseparatedintoliquid-ordereddomainsenrichedinsaturatedlipidsandcholesterolsandliquid-disordereddomainsenrichedinunsaturatedlipids.Oncetheheadgroupchargeisintroduced,theelectrostaticrepulsionbetweenthenegativelychargedlipidheadgroupswillincreasethedistancebetweenthechargedlipids.Wefindthatthelateralorganizationanddiffusionofthelipidsinthe(partially)chargedternarylipidbilayersaredeterminedbythecompetitionbetweentheheadgroupchargeandtheunsaturationoftheunsaturatedlipids.Inthebilayerscontainingunsaturatedlipidswithlowerunsaturation,theheadgroupchargeplaysacrucialroleinthelateralorganizationanddiffusionoflipids.Theheadgroupchargemaymakethelipiddomainsunstableandevencansuppressphaseseparationofthelipidsinsomesystems.However,inthebilayerscontaininghighlyunsaturatedlipids,thelateralorganizationanddiffusionoflipidsaremainlydominatedbytheunsaturationoftheunsaturatedlipids.Thisworkmayprovidesometheoreticalinsightsintounderstandingtheformationofnanosizeddomainsandlateraldiffusionoflipidsinplasmamembranes.

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简介：让{X，Xk：k1}是扩大否定地依赖的随机的一个序列有普通分发F令人满意的前的变量>0。让是nonnegative珍视整数的随机的变量，独立于{X，Xk：k1}。在这份报纸，作者为随机的和$S_\tau=\sum\limits_获得必要、足够的条件{n=1}^\tau{X_n}$当随机的数字比被加数有一条更重的尾巴时，有一条一致地变化的尾巴，即，$\frac{{P(X>x)}}{{P(\tau>x)}}\to0$作为x。

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