简介：Theviscouspump,whichhasarotorwithahelicalsquarechannel,isstudiedexperimentally.Thenon-dimen-sionalchannelcurvatureistakentobeabout0.1.Threetypesoftorsionofthechannelaremadetoinvestigatethetorsioneffectontheflowcharacteristics.Wemeasurethefluxthroughthechannelataconstantrotorspeedbychangingthepressuresattheentranceandexitofthepump.Wealsoobservethesecondaryflowatacross-sectionofthechannel.Someoftheresultsobtainedareshownasfollows:Thefrictionfactoralongthechanneltogetthesamefluxislargeforlargechanneltorsionataconstantrotation,andbecomessmallwhenthefavorablerotationoftherotortotheflowisapplied.Asforthesecondaryflowinacross-section,thereappearseveraltypesofvortex.Whenthereisnorotation,thesecondaryflowisalmostasymmetrictwo-vortextypeforsmallfluxasistheordinaryDeanvortex,butitchangestoafour-vortextypewhenthefluxislarge.Thesecondaryflowbecomesasymmetricastherotationisapplied.Wehaveunsteadyflowpatternsatlargefluxandrotation.

简介：Responseofadaptivematchedfilter,alsocalledadaptivecorrelator,tomultipathchannelisdiscussedinthispaper.Ithasbeenprovedthatthenewtypeprocessorcanbettermatchwithmultipathchan-nel.Theresultsofexperimentcarriedoutonlakeandinlaboratoryarepresented.Itshowsthattheprocessorhasgooddetectingperformanceintimedomain.

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简介：ThevalidityofNavier'spartialslipconditionisinvestigatedbystudyingtheoscillatoryflowinacoatedchannel.Thetwo-fluidmodelisusedtosolvetheunsteadyviscousequationsexactly.Partialslipisexperiencedbythecorefluid.ItisfoundthatNaviersconditiondoesnotholdforanunsteadycorefluid.

简介：这份报纸为盲目评价建议了一个方法在水下在由使用的浅水环境的隧道在一个单个水中听音器或从单个beam.First收到了数据，收到的信号借助于信号依赖者TF(时间频率)分发被用于来源信号重建，与即时频率评价和TF倒置联合。然后，浅水的隧道评价被收到的信号和估计的来源信号的使用经由WRELAX技术完成。最后，数字模拟的结果和从在华南海试用拿的真实数据的试验性的测试证明了令人满意。建议方法是有用的为，这被显示出在水下隧道评价。

简介：量远距传物的进程能被看作量channel.The连续可变远距传物隧道的准确古典能力被介绍，thechannel忠实也被导出。

简介：Amplitudemodulationofnear-wallturbulencebylarge-scalestructuresintheouterlayerisinvestigatedbydirectnumericalsimulationofturbulentchannelflowsatReynoldsnumberReτ=540,1000,2000.Theeffectofmodulationisobviousinthetwo-pointcross-sectioncorrelationmap,andthecorrelationcoefficientsincreasesignificantlywiththeReynoldsnumber.Theinfluenceofmodulationisreflectedinthetailoftheprobabilitydensityfunctionofthenear-wallflowsignals,whichexpandsastheReynoldsnumberincreases.Theflatnessfactorprovidesaquantitativedescriptionofthehighfluctuationeventsduetomodulation.Vorticalstructuresassociatedwithmodulationarerevealedbyconditionallyaveragingtheflowfieldofthenear-wallextremeevents,providingadepictionofhowtheinfluenceofthelarge-scalestructurespenetratetowardsthenear-wallregion.

简介：点火的分叉分析和催化燃烧在的扑灭一突然微隧道被执行，laminar模型作为流动模型合并了。横向的Thiele模量和滞留时间的平方被用作分叉参数。点火和扑灭行为上的不同参数的影响被调查。所有这些参数在点火和扑灭的分叉行为上有大效果在，这被显示出突然微隧道。燃烧的分叉行为上的流动模型的效果也被分析。结果证明与扁平的速度侧面模型比较，为laminar模型的案例，点火的温度和燃烧的扑灭更高，不稳定的多重答案区域更大。

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简介：Theoreticalandexperimentalinvestigationsofheattransferinflatcurvilinearchannelhavebeencarriedout.Linearandnon-lineareffectsofDeanvortexesonintensityofheattransferweretakenintoaccount.Thelineareffect,whichdescribeharmonic(sinuous)variationoftheheattransfercoefficientneartheconcavesurfaceofthechannelandthenon-lineareffectcausesthegeneralincreaseoftheheattransfercoefficientduetoaugmentationofheattransferengenderedbytheDeanvortexes.Forbotheffects,mathematicalrelationswereobtainedintheformofquadratures.Thesenumericalresultsweremodifiedtotheformconvenientinengineeringcalculations.TheinvestigationshaveshownthatbothlinearandnonlinearcomponentsgrowupwiththeDeannumber.NonlinearcomponentQ0Tincreasesmoreabruptly,whilethelinearoneQ1Tismoreconservative.Thisisaconfirmationofstabilityofvortexstructures.

简介：Amulti-channelACpowerSupplycontrolerdevelopedrecentlybyuswasintrodueedbrieftyinthispaper.Thiscontrollerisacomputercontrolledmulti-electronic-switchdevice.Thecontrollercontains16independentchannelsinastandardbox(440W×405D×125Hmm).Thereisanelectronicswitchineachchannel,theratedloadpoweris≤1kW.Themainfunctionofthecontrolleristosetthestateofelectronicswitch(ON/OFF)

简介：Tostudythepossibilityofdetectingthecrossingchannelbyusingatraditionalloggingtool,acousticfieldgeneratedbyamonopolesourceinacasedwellwithacrossingchannelofvariousanglesissimulatedby2.5-DFiniteDifferenceMethod(FDM).Snapshotsofnormalstressandsynthetictime-domainwaveformsaredisplayed.Thetwo-dimensionalspectruminwave-numberandfrequencydomainsisalsocalculated,wheretheinfluenceofthechannelisclearerthanthatinthewaveforms.Numericalstudydemonstratedthatacrossingchannelcanbedetectedandsizedifitsangleisgreaterthan30degree,andlargerspacingandlowerfrequencysourcearefavorabletodetectandsizethecrossingchannel.

简介：批评转变雷纳兹数字的决心具有为一些设计问题的实际重要性。然而，它不与当前的理论方法是可得到的，并且不得不依靠实验。为超声/极超音速的边界层流动，为决心的试验性的方法也不是可行的。在这份报纸，因此，为为不可压缩的飞机隧道流动的批评转变雷纳兹数字的决心的一个数字方法被建议。测试方法的可行性基本上被瞄准。建议方法被扩大在随后的报纸决定超声/极超音速的边界层流动的批评雷纳兹数字。

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简介：Low-energypartial-waveπNscatteringdataisreexaminedwiththehelpoftheproductionrepresentationofpartial-waveSmatrix,wherebranchcutsandpolesarethoroughlyunderconsideration.Theleft-handcutcontributiontothephaseshiftisdetermined,withcontrolledsystematicerrorestimates,byusingtheresultsofO(p^3)chiralperturbativeamplitudesobtainedintheextended-onmass-shellscheme.InSnandPuchannels,severediscrepanciesareobservedbetweenthephaseshiftdataandthesumofallknowncontributions.Statisticallysatisfactoryfitstothedatacanonlybeachievedbyaddingextrapolesinthetwochannels.WefindthataSnresonancepolelocatesat√zr=(0.895±0.081)—(0.164±0.023)iGeV,onthecomplexs-plane.Ontheotherhand,aFnvirtualpole,asanaccompanyingpartnerofthenucleonbound-statepole,locatesat√zv=(0.966±0.018)GeV,slightlyabovethenucleonpoleontherealaxisbelowthreshold.Physicaloriginofthetwonewlyestablishedpolesisexploredtothebestofoiirknowledge.ItisemphasizedthattheO(p^3)calculationgreatlyimprovesthefitqualitycomparingwiththepreviousO(p^2)one.

简介：三身体、四身体的界限状态的证据与ultracold原子在一系列很最近的实验被报导了。这里，我们经由一个概括原子分子学习多碱的分子的协调创造黑暗状态的技术。实质上由使中介更整齐或tetramer说unpopulated，二隧道的干扰被显示出起一个重要作用在的建设性的量，例如在ultracold温度的协调atom-pentamer变换。

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