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简介：这篇论文处理磁电机水动力学(MHD)当没有滑倒状况不再是有效的时，在多孔的媒介Oldroyd8常数液体流动。修改Darcy的法律在流动建模被使用。有非线性的边界条件的非线性的微分方程与一种反复的技术在联合用有限差别计划数字地被解决。数字结果为Couette，Poiseuille和概括Couette流动被获得。效果在速度侧面上滑动参数被讨论。

简介：ThecomparativenumericalandanalyticalanalysisofscintillationindicesofthevortexLaguerre–GaussianbeamandthenonvortexdoughnutholeandGaussianbeamspropagatingintherandomlyinhomogeneousatmospherehasbeenperformed.Ithasbeenfoundthatthedependenceofthescintillationindexattheaxisoftheopticalvortexontheturbulenceintensityatthepathhastheformofaunitstep.Ithasbeenshownthatthebehaviorofscintillationsinthecrosssectionsofvortexandnonvortexbeamsdifferswidely.DespitethescintillationindexofvortexbeamshasbeencalculatedonlyforthesimplestLG10mode,theobtainedresultsarequitegeneral,becausetheydemonstratethemainpropertiesinherentinscintillationsofvortexbeamsofanytype.

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简介：Basedonthegeneralsolutionofthree-dimensionalproblemsinpiezoelectricmedium,withthemethodofGreen’sfunctins,axisymmetricboundary-valueproblemsarediscussed.Thepurposeofthisresearchisforanalyzingtheeffectiveonmechanicsandelectricityofthepiezoelectricceramicscausedbyvoidsandinclusions.Thedisplacement,tractionandelectricGreen’sfunctionscorrespondingtocircularringloadsactingintheinteriorofapiezoelectricceramicareobtained.AcylindricalcoordinatesystemisemployedandHankeltransformareappliedwithrespecttoradialcoor-dinates.ExplicitsolutionsforGreen’sfunctionsarepresentedintermsofinfiniteintegralsofLipshitz-Hankeltype.Bysolvingatractionboundary-valueproblem,thesolutionschemeisillustrated.

简介：AlocalgradientestimateforpositivesolutionsofporousmediumequationsoncompletenoncompactRiemannianmanifoldsundertheRicciflowisderived.Moreover,aglobalgradientestimateforsuchequationsoncompactRiemannianmanifoldsisalsoobtained.

简介：Theadsorptionoffreeacidoflowconcentrationbycrosslinkedchitosanresinwasfollowedbyelectrochemicalexperimentaltechnique.Theeffectofacidconcentrationandthemediaonadsorptionwasdiscussed.Theexperimentalresultsshowthatboththeapparentrateconstantandtheinteractionenergybetweentheadsorbentandadsorbatearedecreasedwhiletheconcentrationofhydrochloricacidisincreased.Intheadsorptionsystem.theadsorptionwaseffectedbyaddiitonoforganicsolvent.

简介：Asequentialstatisticalapproachwasappliedtooptimizingthefermentationmediumofepothilones(Epos)productionbymeansofamutantwhichwasobtainedbytreatingpolyangiumcellulosumATCC15384withnitriteandultraviolet.Theeffectsofdifferentcarbonsourcesandnitrogensourcesonthefermentationmediumweretested,andthesuitableoneswereselected.Thenauniformdesignwasemployedtodesigntheexperiments.Alinearmodelwasdevelopedforidentifyingthesignificantcomponentsinfermentationmedium,whileathirddegreepolynomialmodelwasusedforstudyingtherelationshipbetweentheconcentrationofthecomponentsinfermentationmediumandtheyieldofEpos(YEPs).Apatternsearchmethodwasusedforsearchingtheoptimumfermentationmediuminthetestspace,whichwasasfollows(g/L):potassiumnitrate8.00,soybeanpeptone17.60,potassiumhydrogenphosphate1.00,beefextraction6.46,yeastextraction1.00,calciumchloride0.25,sodiumchloride1.00andferricchloride0.02.TheoptimumfermentationmediumwasexpectedtoresultinayieldofEpos(YEPs)of2.48mg/L.ThevalidationexperimentswiththeoptimummediumwereperformedintriplicateandtheaverageyieldofEposwas2.45mg/Lwhichwas7.78timeshigherthanthatofEpospreparedwithoutoptimization.

简介：AnanalysisispresentedwithmagnetohydrodynamicsnaturalconvectiveflowofaviscousNewtonianfluidsaturatedporousmediuminaverticalslot.TheflowintheporousmediahasbeenmodeledusingtheBrinkmanmodel.Thefully-developedtwo-dimensionalflowfromcappedtoopenendsisconsideredforwhichacontinuumofsolutionsisobtained.Theinfluenceofpertinentparametersontheflowisdelineatedandappropriateconclusionsaredrawn.Theasymptoticbehaviourandthevolumefluxareanalyzedandincorporatedgraphicallyforthethree-parameterfamilyofsolution.

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简介：Thispaperconsiderstheexistenceandasymptoticestimatesofglobalsolutionsandfinitetimeblowupoflocalsolutionofnon-Newtonfiltrationequationwithspecialmediumvoidofthefollowingform:{ut/|x|^2-△pu=u^q,(x,t)∈Ω×（0,T),u(x,t)=0,(x,t)∈ЭΩ×（0，T），u（x，0）=u0(x),u0(x)≥0,u0(x)全不等于0，where△pu=div(|△↓u|^p-2△↓u),ΩisasmoothboundeddomaininR^N(N≥3),0∈Ω,2

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简介：ThispaperinvestigatestheunsteadyhydromagneticCouettefluidflowthroughaporousmediumbetweentwoinfinitehorizontalplatesinducedbythenon-torsionaloscillationsofoneoftheplatesinarotatingsystemusingboundarylayerapproximation.ThefluidisassumedtobeNewtonianandincompressible.Laplacetransformtechniqueisadoptedtoobtainaunifiedsolutionofthevelocityfields.Suchaflowmodelisofgreatinterest,notonlyforitstheoreticalsignificance,butalsoforitswideapplicatio...

简介：Basedonthetheoryofcomplexfunctionandtheprincipleofhomogenization,harmonicdynamicsstressofaradiallyinfiniteinhomogeneousmediumwithacircularcavityisinvestigated.Duetothesymmetry,wavevelocityisassumedtohavepower-lawvariationintheradialdirectiononly,andtheshearmodulusisconstant.TheHelmholtzequationwithavariablecoefficientisequivalentlytransformedintoastandardHelmholtzequationwithageneralconformaltransformationmethod(GCTM).Thedisplacementsandstressfieldsareproposed.Numericalresultsshowthatthewavenumberandtheinhomogeneityparameterofthemediumhavesignificanteffectsonthedynamicstressconcentrationaroundthecircularcavity.Thedynamicstressconcentrationfactor(DSCF)becomessingularwhentheinhomogeneityparameterofmediumisclosetozero.

简介：在有损耗的媒介解决电磁的反的散布问题的一个混合方法被建议。坡度搜索方法首先被用来决定目标的空间分发，然后，蒙特卡罗方法被选择计算scatterer的传导性和介电常数。数字实验的结果证实联合二个方法的混合方法是高精确的，有效，并且适合到全球优化。[从作者抽象]

简介：TheDonnelltheoryofshellwasappliedtodescribeshellmotion.Theinnerandoutershellswerestiffenedbytransversecomponents.Usingdeformationharmoniousconditionsoftheinterface,theeffectsofstiffenersweretreatedasreverseforcesandmomentsonthedoublecylindricalshell.Intheacousticfieldproducedbyvibrationandsoundradiationofthedoubleshell,thestructuredynamicequation,Helmholtzequationinthefluidfieldandthecontinuityconditionsofthesurfaceoffluid-structurecomposethevibrationequationcoupledbythesound-fluid-structure.Theextractofacousticpressurecomesdowntotheextractofcouplingvibrationequation.Thenearfieldacousticpressurecanbesolveddirectlybycomplicatedcalculationalmethods.

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简介：Thispaperisconcernedwiththethermoelasticbehaviorsofanelasticmediumwithvariablethermalmaterialproperties.Theproblemisinthecontextoffractionalorderheatconduction.Thegoverningequationswithvariablethermalpropertieswereestablishedbymeansofthefractionalordercalculus.Theproblemofahalf-spaceformedofanelasticmediumwithvariablethermalmaterialpropertieswassolved,andasymptoticsolutionsinducedbyasuddentemperatureriseontheboundarywereobtainedbyapplyinganasymptoticapproach.Thepropagationsofthermoelasticwaveandthermalwave,aswellasthedistributionsofdisplacement,temperatureandstresseswereobtainedandplotted.Variationsinthedistributionswithdifferentvaluesoffractionalorderparameterwerediscussed.Theresultswerecomparedwiththoseobtainedfromthecaseofconstantmaterialpropertiestoevaluatetheeffectsofvariablematerialpropertiesonthermoelasticbehaviors.

简介：Theauthorsstudyaporousmediumequationwitharight-handside.TheoperatorhasnonlocaldiffusioneffectsgivenbyaninversefractionalLaplacianoperator.ThederivativeintimeisalsofractionalandisofCaputo-type,whichtakesintoaccount'memory'.TheprecisemodelisD_t~αu-div(u(-Δ)~(-σ)u)=f,0<σ<1/2.Thispaperposestheproblemover{t∈R~+,x∈R~n}withnonnegativeinitialdatau(0,x)≥0aswellastheright-handsidef≥0.Theexistenceforweaksolutionswhenf,u(0,x)haveexponentialdecayatinfinityisproved.ThemainresultisH¨oldercontinuityforsuchweaksolutions.