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  • 简介:NumericaltechniquesplayanimportantroleinCFD.Someofthemarereviewedinthispaper.ThenecessityofusinghighorderdifferenceschemeisdemonstratedforthestudyofhighReynoldsnumberviscousflow.Physicalguidelinesareprovidedfortheconstructionofthesehighorderschemes.Toavoidundulyadhoctreatmentintheboundaryregiontheuseofcompactschemeisrecommendedbecauseithasasmallstencilsizecomparedwiththetraditionalfinitedifferencescheme,BesidespreliminaryFourieranalysisshowsthecompactschemecanalsoyieldbetterspaceresolutionwhichmakesitmoresuitabletostudyflowwithmultiscalese.g.turbulence.Otherapproachessuchasperturbationmethodandfinitespectralmethodarealsoemphasized.Typicalnumericalsimulationswerecarriedout.ThefirstdealswithEulerequationstoshowitscapabilitiestocaptureflowdiscontinuity.TheseconddealswithNavier-Stokesequationsstudyingtheevolutionofamixinglayer,thepertinentstructuresatdifferenttimesareshown.Asymmetricbreakdownoccursandalsotheappearanceofsmallvortices.

  • 标签: HIGH order ACCURATE SCHEME EULER EQUATIONS
  • 简介:BackgroundSpinalpainisaserioushealthandsocial-economicproblem.Endoscopicspinesurgeryasatreatmentoptionforspinalpainhasgainedtremendousattentionandgrowthinthepast2decades,andavarietyofendoscopictechniqueshavebeeninventedtotreatawiderangeofspinalconditions.PurposesThepurposesofthis2-partreviewarticleareto1)overviewthepublishedtechniquesofendoscopicspinesurgery,2)summarizetheapplicationsofthesetechniquesintreatingvariousspinalconditions,and3)evaluatetheclinicalevidenceofthesafetyandeffectivenessoftheseendoscopictechniquesintreatingsomeofthemostcommonspinalconditions.Thefirstpartofthereviewarticleprovidesanoverviewofcurrentlymostcommonlyusedtechniques.MethodsWesearchedthePubMeddatabaseforpublicationsconcerningendoscopicspinesurgeryandreviewedtherelevantarticlespublishedintheEnglishlanguage.ResultsDiscectomyandforaminotomyarethemostcommontypesofspinesurgerythatcancurrentlybedoneendoscopically.Endoscopictechniqueshavebeenusedtotreatawiderangeofspinaldisorderslocatedinthelumbar,cervical,aswellasthethoracicregionsofthespine.

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  • 简介:FoundedinOctober1987,JiaozuoHuafeiElectronic&ElectricApparatusIndustrialCo.,Ltd.hasbeenpursuingadvancedtechnologyandoutstandingquality,andhascarvedoutasuccessfulroadofrelyingontechnologicalinnovationtoconstruct,developandexpand.Thecompanyhasdevelopedintoaprovince-levelhigh&newtechnologyenterprise,province-levelenterprisetechnologicalcenter,withtheintegrationofscientificresearchanddevelopment,productionandbusinessoperation,andtechnologicalservices.Thecompanyhasbeenengagedintheproductionofaseriesofhighandnewtechnologicalproductsastheelectroniccontrolsystemofdirectcurrent,alternatingcurrentandfrequencyconversionhoistingmachine,averagetypeandexplosion-prooftype

  • 标签: 河南 高新技术企业 电子控制技术 煤炭产业
  • 简介:Ievaluatedmyteachingpracticefromthefollowingperspective,namely:theapplicationofwholelanguageapproach,emphasisonthevarietyofEnglishbeingtaught,errorcorrection,adoptingauthentictaskinbothteachingandexamaswellasstrategyinstruction.TheyplayaroleinenhancingoralEnglish.

  • 标签: WHOLE language approach ERROR CORRECTION TBLT
  • 简介:Thispaperfocusesontheauthors'contributionstoITU-TtodevelopthenetworkmodelingforthesupportofIN/Internetinterworking.Followinganintroductiontobenchmarkinterworkingservices,thepaperdescribestheconsensusenhancedDFParchitecture,whichisreachedbasedonIETFreferencemodelandtheauthors'proposal.Thentheproposedinformationflowsforbenchmarkservicesarepresentedwithneworupdatedflowsidentified.Finallyabriefdescriptionisgiventoimplementationtechniques.

  • 标签: 智能网 互联网 网络互连 网络模型
  • 简介:Themeasurementtechniquesoffemtosecondspectroscopyareeffectivemethodtoinvestigateultrafastdynamics,theyarewidelyusedinthefieldsofphysics,chemistryandbiology.Inthispaper,theprinciple,experimentsetupandtheapproachestodealwiththeexperimentdatawerepresented.Thendifferentmeasurementtechniquessuchastransientabsorptionspectroscopy,photonechoes,opticalKerreffectanddegeneratefour-wavemixingwereexplainedwithspecialexamples.Atlast,theapplicationprospectofmeasurementtechniquesoffemtosecondspectroscopywasforecasted.

  • 标签: 飞秒激光器 超快动力学 第四混频 泵浦探测
  • 简介:Tuinatechniquesinchildrenaresimilartothoseinadults.Somearesameinname,butdifferentinmethods,suchaspushingtechnique.Sometechniquesarejustappliedtochildrenratherthantoadults,suchaspushingmethod.Inclinicalpractice,suchintenseTuinatechniquesasnailing,grasping,andpinchingarepracticedastheendingmanipulations,soasnottohurtchildrenandaffecttreatment.Suchmediaasgingerjuice,Talcumpowderandeggwhitearecommonlyusedtopreventfromskinabrasionandimprovetherapeuticeffects.

  • 标签: 推拿手法 儿童 皮肤磨损 临床实践
  • 简介:AbstractAs a new discipline, neuroaesthetics has developed rapidly to become an important branch of neuroscience. The study of neuroaesthetics is of great significance to understanding the mechanisms underlying human aesthetics. In this review, we briefly define neuroaesthetics, and then review the current state of aesthetics research with a focus on single-modal and multi-modal neuroimaging technologies using the visual and auditory modalities. Finally, we summarize current challenges and trends in the field.

  • 标签: aesthetics brain mechanism cognitive science neuroaesthetics neuroimaging
  • 简介:unawarethatitiscomposedoftheephemeralstuffofthepastThecruelrealitysmashedGatsby’sdream.Fitzgerald’scommentonthefailureofGatsby’sdreamisalsoastatementonthefailureofAmericandream.Thecontrastofthedreamandtherealitysignificantlyindicatesamovingawayfromfaithandhopeinaworldwherematerialinterestshavedrivenoutsentimentalityandfaith.Whatismore,andnewwealth.TheGreatGatsbypresentstheAmericansceneduringthoseriotousyears.Thenovelisasuperbrecreationofthehigh-keyed,theyloseeverythingintheend.ThesharpcontrastbetweendreamandrealitynotonlyexplainsGatsby’sfailureattheend

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  • 简介:Bargraphsareconvenientforshowingcomparisonsamongitems.Thebarsmaybeeitherhorizontalorvertical,andtheyareusedtoshowtheamountsofdifferentitems.Figure1isanexampleofatypicalbargraph.ThegraphshowstheaveragesalespriceofexistinghomesintheNortheastUnitedStatesforthreeyears——1970,1980,and1997.

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  • 简介:ApplicationofSuperresolutionTechniquestoRadarImagingA.Fanrina,F.Prodi&F.Vinelli(Alenia.UnaAziendaFinmeccanica.Radar&C2Divisio...

  • 标签: RADAR IMAGING SAR ISAR ERS- 1
  • 简介:reality1IntroductionF.ScottFitzgerald’smasterpieceTheGreatGatsbyshowsusavividpictureofthe1920swithitssuperficialprosperityandunderlyingsadness.ThefailureofAmericandreamandthecrisisofvaluearewellreflectedincharactersandthedetailsofthenovel.InTheGreatGatsby,amongwhichthemostimpressivearethesharpcontrastbetweenGatsby’spartiesandhisfuneralandthestrongcontradictsbetweentheeastandthewest.ThesetwopairsofcontrastivescenesforeshadowGatsby’stragicaldestination.2.1.1Thepartiesvs.thefuneralTheJazzAgeisatimeofbrokendream,withthefrustrationofhisdream.Gatsby’sfuneralisratherdesertedandcheerlesscomparedwithhisparties.It’sarecordofhumancoldness.NickhasinvitedsomepeopletocometoGatsby’sfuneral.ThesepeopleareallGatsby’sso-calledfriends.TheyfindalotofexcusesfortheirabsencebecausetheyknowclearlythatGatsbyisnolongerusefulforthem.Gatsby’sgenerouspartieshavenotbroughthimevenonefriend.What’smore

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  • 简介:It'soneoftheearliestmedicaltechniquestorelievepain,restorehealthandenjoycomfortwithmanipulations.Knowledgeonspinalneckpain,shoulderpain,lowbackpainandlegpaincanbetracedbacktotheearlystageofhumanevolutionanduprightpositionoftwolegs.ThereforethehistoryoftreatingspinaldiseaseswithTuinaormanipulationsprobablykeepsthesamepacewithcivilization.

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