简介：wellposedness问题为一各向异性不可压缩粘滞在3的液体，在向量B附近旋转(t，x):=(b1(t，x)，b2(t，x)，b3(t，x))，被学习。在同类的案例中的全球wellposedness(B=e3)与在空间B0的足够地快的旋转，？被证明。在不同类的案例中(B=B(t，xh))，在B0的答案的全球存在和唯一，？被获得，如果起始的数据是足够的与水平粘性相比小。而且，我们在一样的函数空格获得解决方案的一致本地存在和唯一。我们也在B2,1获得整齐的繁殖吗？在另外的假设下面，那B仅仅取决于一个水平空间变量。

简介：Osteocytesactasmechanosensorsinbone,whichcansendmechanicalsignalsdirectlytoosteoblaststhroughgapjunctions.However,underphysiologicalconditionsthenumberofgapjunctionsislimitedbecauseofthequantityvarianceofthetwokindsofcells.Inthisstudy,thepossibilityofindirectinteractionbetweenthesetwocellswasinvestigated.Anewflowchamperwasdesignedinwhichosteocytesandosteoblastswerecoculturedintwochampersseparately.OsteocyteswereexposedtofluidflowandthentheALPactivity,osteocalcinandosteopotinofosteoblastsweredetermined.TheresultsshowedthateitherALPactivityorproductionofosteocalcinandosteopotininosteoblaststhatwerecoculturedwithshearedosteocytesincreased,whichindicatedthatosteocytescouldregulateosteoblastsindirectlythroughsomesolublefactors.

简介：Vibrationofacircularmembraneincontactwithafluidhasextensiveapplicationsinindustry.Thenaturalvibrationfrequenciesfortheasymmetricfreevibrationofacircularmembraneincontactwithaboundedincompressiblefluidarederivedinthispaper.Consideringsmalloscillationsinducedbythemembranevibrationinanincompressibleandinviscidfluid,thevelocitypotentialfunctionisusedtodescribethefluidfield.Twoapproachesareusedtoderivethefreevibrationfrequenciesofthesystem,whichincludeavariationalformulationandanapproximatesolutionemployingtheRayleighquotientmethod.Agoodcorrelationisfoundbetweenfreevibrationfrequenciesevaluatedbythesemethods.Finally,theeffectsofthefluiddepth,themassdensity,andtheradialtensiononthefreevibrationfrequenciesofthecoupledsystemareinvestigated.

简介：Theprocessesreportedforthepreparationoflanthanumhexaboride(LaB6)fromlanthanumoxideinvolvetheuseofcarboneitherelementalorintheformofboroncarbideorelementalboronitselfasreducingagents,fusedsaltsathightemperaturesorreactionswhichrequiretheproductboridetobeleachedout.Eachofthesetechniqueseitherincreasestheprocesscostsand/orincreaseschancesofcontaminationinfi-nalproduct.PureLaB6canbestbepreparedbyareactionwhichproducesagaseousbyprodu...

简介：当它极大地影响用户满足的度，申请发射性能对系统站台开发者和供应商很重要。改进应用程序发射性能的最最有效的方法是用一个稳固的州的驱动器(SSD)代替一个硬盘驱动器(HDD)，它最近变得买得起、流行。一个自然问题当时是是否用一个新SSD知道的优化器代替传统的HDD知道的申请发射台。我们由在SSD上分析HDD知道的申请发射台的无效然后建议预取计划的新SSD知道的应用探讨这个问题，叫了快申请跑步者(快)。关键想法快是重叠有SSD存取(I/O)的计算(中央处理器)时间时间在应用程序发射期间。快由一套用户级的部件和LinuxOS(操作系统)提供的系统调试工具组成。因此，没有核重新编译，能容易快在任何最近的Linux版本被部署。我们与运用Linux2.6.32OS的SSD在桌面PC上快实现并且由运行一套使用得广泛地的应用程序评估它，表明象与没有prefetcher的PC相比的申请发射时间的28%减小的一般水准。

简介：Thefiniteelementmethodhasbeenconsideredasoneofthemostsignificantengineeringadvancesofthetwentiethcentury.Thiscomputationalmethodologyhasmadesubstantialimpactonmanyfieldsinscienceandalsohasprofoundlychangedengineeringdesignproceduresandpractice.Thispaper,mainlyfromasolidmechanicsperspective,andtheSwanseaviewpointinparticular,describesverybrieflytheoriginofthemethodology,thensummariesselectedmilestonesofthetechnicaldevelopmentsthathavetakenplaceoverthelastfiftyyearsandillustratestheirapplicationtosomepracticalengineeringproblems.

简介：ThispaperestablishesthevelocityfieldandtheadequateshearstresscorrespondingtothemotionofanOldroyd-BfluidbetweentwoinfinitecoaxialcircularcylindersbymeansoffiniteHankeltransforms.Theflowofthefluidisproducedbytheinnercylinderwhichappliesatime-dependentlongitudinalshearstresstothefluid.Theexactanalyticalsolutions,presentedinseriesformintermsofBesselfunctions,satisfyallimposedinitialandboundaryconditions.ThegeneralsolutionscanbeeasilyspecializedtogivesimilarsolutionsforMaxwell,secondgradeandNewtonianfluidsperformingthesamemotion.Finally,somecharacteristicsofthemotionaswellastheinfluenceofthematerialparametersonthebehaviorofthefluidmotionaregraphicallyillustrated.

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简介：Toanalyzeanddepictcomplicatedfluidbehaviorsinfracturedporousmediawithvariablypermeablematrix,anintegrateddiscretecomputationalalgorithmisproposedbasedonlatticeBoltzmannmethod(LBM).Thispapercombineswiththeexternalforcemodelandstatisticalmaterialphysicstoeffectivelydescribethefeaturechangeswhilethefluidpassesthroughthefractureswithinthepermeablematrix.Asanapplicationexample,atwodimensionalrocksampleisreconstructedusingthedigitalimageandcharacterizedwithdifferentfeaturevaluesateachLBMgridtodistinguishpores,impermeableandpermeablematrixbystatingitslocalphysicalproperty.ComparedwiththeconventionalLBM,theresultsdemonstratetheadvantagesofproposedalgorithminmodelingfluidflowphenomenoninfracturedporousmediawithvariablypermeablematrix.

简介：Theobjectiveofthisresearchistopreparespeciallydesignedsurfacetextureonhardsteelsurfacebyelectrochemicalmicromachining(EM)andtoincorporateelectrolessplatedAg/MoS2solidlubricantcoatingintothedimplesofEMtexturedsteelsurfacetoeffectivelyreducefrictionandwearofsteel-steelcontacts.ThefrictionandwearbehavioroftheAg/MoS2solidlubricantcoatingonEMtexturedsteelsurfacewasevaluatedinrelationtothesizeandspacingofthedimplesthereon.Themicrostructur...

简介：有流动上的不同安排密度的纵的酒吧介绍的不同沉没障碍和一个scour洞的形态学的效果在清楚的水条件下面被调查。声学的Dopplervelocimetry(副词)数据被使用阴谋三维的速度和狂暴的轮廓的垂直分布。试验性的结果显示那安排密度(能也代表孔)，结构的材料(灵活或稳固)，并且sidewall效果是影响狂暴的动能和形态学的主要因素搜索洞。为灵活植被，床表面附近的最大的狂暴的动能与安排密度增加了。为一样的结构，深度和scour洞的侧面的扩大的大小也与安排密度增加了。因为偏转和安排密度，灵活植被减少了scour洞的深度。大量scour在结构在灵活植被比作很好那些的固体的在上游、中间的节发现了。多孔的灵活植被的偏转下游地搬运了狂暴的动能，在沉积床附近减少了狂暴的动能，并且增加了酒吧的稳定性。灵活植被酒吧能在正常条件下面保护河岸和一条河的床，使他们成为在河的管理和恢复的一个好其他的图案。

简介：Takingextractionrateasanindicator,theextractiontechnologyofChinese-firheartwoodbysupercriticalcarbondioxidetreatmentwasstudied,andtheextractionrateoftheSFE-CO2methodwascomparedtothatoftraditionalextractionmethod.Theresultsshowthatwhenextractionprocessingconditionwere:extractionpressure30MPa,extractiontemperature40℃,extractiontime120m,andflowvelocity20kg/h,theextractionrateofSFE-CO2was0.99%,0.20%morethanthatofthetraditionalextractionmethod.However,takingthecostintoconsideration,itisproposedthatthetraditionalextractionisusedunlesstherearespecificrequirements.

简介：为了提供，身体上在地区性的规模为风侵蚀研究基于风建模，3D计算液体动力学(CFD)风模型被开发。模型基于海军司烧方程用C语言被规划，并且它作为开放源代码自由地可得到。与空间分析和建模工具(SAMT)综合，风模型举办方便输入准备和强大的产量可视化。为了验证风模型，，一系列实验在一条风隧道被进行。一个堵住的流入实验被设计在基本液体进程的模拟上测试模型的性能。一个圆障碍实验被设计检查模型是否能在风地上模仿障碍的影响。结果证明测量并且模仿的风地有高关联，和风模型能两个都模仿风的基本过程和对风地的障碍的影响。这些结果显示出风模型的高可靠性。一个区域的一个数字举起模型(DEM)(长的3800m和1700m宽)在在内部蒙古的Xilingele草地(自治区域，中国)被用于模型，和一块3D风地成功地被产生了。由风隧道实验的模型和足够的确认的清楚的实现在地区性的规模为风侵蚀的预言和评价打了一个稳固的基础。

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简介：ObjectivePorencephaliccystpresentingwithotologicinvolvementisuncommon.Onlyafewcaseshavebeenreported.Wereportararecaseofcerebrospinalfluid(CSF)otorrheacausedbyamassiveporencephaliccystencompassingthelefttemporalandoccipitallobes.TheCSFleakwasrepairedsuccessfullyusingatransmastoidapproachwithfacia,abdomenfatandfibringluetosealtheosseousdefectsinthesinoduralangle.AreviewoftheliteratureconcerningporencephaliccystandCSFotorrheaisalsopresented.

简介：thermoelasticity的Green-Naghdi(G-N)理论被采用就对飞机表面起作用的各种各样的来源的影响而言与虚空学习micropolarthermoelastic固体的变丑。正常模式分析被用来获得排水量部件，力量压力，联合压力，卷部分地的变化和温度分发的分析表达式。当体积来源被使用时，计算结果图形地被介绍。有或没有micropolarity效果的类型II和类型III的比较被做，结果在上下文预言了(G-N)理论。

简介：Particlebasedmethodscanbeusedforboththesimulationsofsolidandfluidphasesinmultiphasemedium,suchasthediscrete-elementmethodforsolidphaseandthesmoothedparticlehydrodynamicsforfluidphase.Thispaperpresentsacomputationalmethodcombiningthesetwomethodsforsolid-liquidmedium.ThetwophasesarecoupledbyusinganimprovedmodelfromareportedLagrangian-Eulerianmethod.Thetechniqueisverifiedbysimulatingliquid-solidflowsinatwo-dimensionallid-drivencavity.

简介：Ananalyticalmodelisdevelopedtostudythesurfaceeffectsonthevibrationbehaviorincludingthenaturalfrequencyandthecriticalflowvelocityoffluid-conveyingnanotubesembeddedinanelasticmedium.TheeffectsofsurfaceelasticityandresidualsurfacestressareaccountedthroughthesurfaceelasticitymodelandtheYoung-Laplaceequation.AWinkler-typefoundationisemployedtomodeltheinteractionofnanotubesandthesurroundingmedium.Theresultsshowthatthesurfaceeffectshavemoreprominentinfluencesonthenaturefrequencywithsmallernanotubethickness,largeraspectratioandlargerelasticmediumconstants.Bothsurfacelayersandtheelasticmediumenhancethestabilityofnanotubes.Thisstudymightbehelpfulfordesigningthefluid-conveyingnanotubedevicesinNEMSandMEMSsystems.

简介：基于Fl銈賦蒚雨馢髧蚜?蒚?蒚??鋥??吗？

简介：Asuccessfulbeamcleanupofa5-mJ/200-μspulsedsolid-statelasersystemoperatingat532-nmwavelengthisdemonstrated.Inthisbeamcleanupsystem,awave-frontsensor-lessadaptiveoptics(AO)systemissetupwitha20-elementbimorphmirror(BM),ahigh-voltageamplifier,acharge-coupleddevicecamera,andacontrolsoftwareimplementingthestochasticparallelgradientdescent(SPGD)algorithm.Thebrightnessofthelaserfocalspotisimprovedbecausethewave-frontdistortionshavebeencompensated.Theperformanceofthissystemispresentedandtheexperimentalresultsareanalyzed.