简介:NumericaltechniquesplayanimportantroleinCFD.Someofthemarereviewedinthispaper.ThenecessityofusinghighorderdifferenceschemeisdemonstratedforthestudyofhighReynoldsnumberviscousflow.Physicalguidelinesareprovidedfortheconstructionofthesehighorderschemes.Toavoidundulyadhoctreatmentintheboundaryregiontheuseofcompactschemeisrecommendedbecauseithasasmallstencilsizecomparedwiththetraditionalfinitedifferencescheme,BesidespreliminaryFourieranalysisshowsthecompactschemecanalsoyieldbetterspaceresolutionwhichmakesitmoresuitabletostudyflowwithmultiscalese.g.turbulence.Otherapproachessuchasperturbationmethodandfinitespectralmethodarealsoemphasized.Typicalnumericalsimulationswerecarriedout.ThefirstdealswithEulerequationstoshowitscapabilitiestocaptureflowdiscontinuity.TheseconddealswithNavier-Stokesequationsstudyingtheevolutionofamixinglayer,thepertinentstructuresatdifferenttimesareshown.Asymmetricbreakdownoccursandalsotheappearanceofsmallvortices.
简介:BackgroundSpinalpainisaserioushealthandsocial-economicproblem.Endoscopicspinesurgeryasatreatmentoptionforspinalpainhasgainedtremendousattentionandgrowthinthepast2decades,andavarietyofendoscopictechniqueshavebeeninventedtotreatawiderangeofspinalconditions.PurposesThepurposesofthis2-partreviewarticleareto1)overviewthepublishedtechniquesofendoscopicspinesurgery,2)summarizetheapplicationsofthesetechniquesintreatingvariousspinalconditions,and3)evaluatetheclinicalevidenceofthesafetyandeffectivenessoftheseendoscopictechniquesintreatingsomeofthemostcommonspinalconditions.Thefirstpartofthereviewarticleprovidesanoverviewofcurrentlymostcommonlyusedtechniques.MethodsWesearchedthePubMeddatabaseforpublicationsconcerningendoscopicspinesurgeryandreviewedtherelevantarticlespublishedintheEnglishlanguage.ResultsDiscectomyandforaminotomyarethemostcommontypesofspinesurgerythatcancurrentlybedoneendoscopically.Endoscopictechniqueshavebeenusedtotreatawiderangeofspinaldisorderslocatedinthelumbar,cervical,aswellasthethoracicregionsofthespine.
简介:FoundedinOctober1987,JiaozuoHuafeiElectronic&ElectricApparatusIndustrialCo.,Ltd.hasbeenpursuingadvancedtechnologyandoutstandingquality,andhascarvedoutasuccessfulroadofrelyingontechnologicalinnovationtoconstruct,developandexpand.Thecompanyhasdevelopedintoaprovince-levelhigh&newtechnologyenterprise,province-levelenterprisetechnologicalcenter,withtheintegrationofscientificresearchanddevelopment,productionandbusinessoperation,andtechnologicalservices.Thecompanyhasbeenengagedintheproductionofaseriesofhighandnewtechnologicalproductsastheelectroniccontrolsystemofdirectcurrent,alternatingcurrentandfrequencyconversionhoistingmachine,averagetypeandexplosion-prooftype
简介:Ievaluatedmyteachingpracticefromthefollowingperspective,namely:theapplicationofwholelanguageapproach,emphasisonthevarietyofEnglishbeingtaught,errorcorrection,adoptingauthentictaskinbothteachingandexamaswellasstrategyinstruction.TheyplayaroleinenhancingoralEnglish.
简介:Thispaperfocusesontheauthors'contributionstoITU-TtodevelopthenetworkmodelingforthesupportofIN/Internetinterworking.Followinganintroductiontobenchmarkinterworkingservices,thepaperdescribestheconsensusenhancedDFParchitecture,whichisreachedbasedonIETFreferencemodelandtheauthors'proposal.Thentheproposedinformationflowsforbenchmarkservicesarepresentedwithneworupdatedflowsidentified.Finallyabriefdescriptionisgiventoimplementationtechniques.
简介:Themeasurementtechniquesoffemtosecondspectroscopyareeffectivemethodtoinvestigateultrafastdynamics,theyarewidelyusedinthefieldsofphysics,chemistryandbiology.Inthispaper,theprinciple,experimentsetupandtheapproachestodealwiththeexperimentdatawerepresented.Thendifferentmeasurementtechniquessuchastransientabsorptionspectroscopy,photonechoes,opticalKerreffectanddegeneratefour-wavemixingwereexplainedwithspecialexamples.Atlast,theapplicationprospectofmeasurementtechniquesoffemtosecondspectroscopywasforecasted.
简介:Tuinatechniquesinchildrenaresimilartothoseinadults.Somearesameinname,butdifferentinmethods,suchaspushingtechnique.Sometechniquesarejustappliedtochildrenratherthantoadults,suchaspushingmethod.Inclinicalpractice,suchintenseTuinatechniquesasnailing,grasping,andpinchingarepracticedastheendingmanipulations,soasnottohurtchildrenandaffecttreatment.Suchmediaasgingerjuice,Talcumpowderandeggwhitearecommonlyusedtopreventfromskinabrasionandimprovetherapeuticeffects.
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.
简介:unawarethatitiscomposedoftheephemeralstuffofthepastThecruelrealitysmashedGatsby’sdream.Fitzgerald’scommentonthefailureofGatsby’sdreamisalsoastatementonthefailureofAmericandream.Thecontrastofthedreamandtherealitysignificantlyindicatesamovingawayfromfaithandhopeinaworldwherematerialinterestshavedrivenoutsentimentalityandfaith.Whatismore,andnewwealth.TheGreatGatsbypresentstheAmericansceneduringthoseriotousyears.Thenovelisasuperbrecreationofthehigh-keyed,theyloseeverythingintheend.ThesharpcontrastbetweendreamandrealitynotonlyexplainsGatsby’sfailureattheend
简介:Bargraphsareconvenientforshowingcomparisonsamongitems.Thebarsmaybeeitherhorizontalorvertical,andtheyareusedtoshowtheamountsofdifferentitems.Figure1isanexampleofatypicalbargraph.ThegraphshowstheaveragesalespriceofexistinghomesintheNortheastUnitedStatesforthreeyears——1970,1980,and1997.
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
简介:It'soneoftheearliestmedicaltechniquestorelievepain,restorehealthandenjoycomfortwithmanipulations.Knowledgeonspinalneckpain,shoulderpain,lowbackpainandlegpaincanbetracedbacktotheearlystageofhumanevolutionanduprightpositionoftwolegs.ThereforethehistoryoftreatingspinaldiseaseswithTuinaormanipulationsprobablykeepsthesamepacewithcivilization.