简介:MarmaraSea,locatedbetweenBlackSeaandAegeanSea,isanimportantseaforoceanengineeringactivities.Inthisstudy,wavepowerpotentialofMarmaraSeawasinvestigatedusingthethirdgenerationspectralwind-wavemodelMIKE21SWwithunstructuredmesh.WinddatawasobtainedfromECMWFERA-Interimre-analyseswinddatasetat10mwithaspatialresolutionof0.1?fortheperiodof1994to2014.ThenumericalmodelwascalibratedwithmeasuredwavedatafromabuoystationlocatedinMarmaraSea.Meshoptimizationwasalsoperformedtoobtainthemostsuitablemeshstructureforthestudyarea.ThisstudyisthefirstthatdealtwiththedeterminationofwaveenergypotentialofMarmaraSea.Thenumericalmodelresultsarepresentedintermsofmonthly,seasonalandannualaverageofwavepowerflux(kWm-1).Themaximumwavepowerfluxis1.13kWm-1andoccursinNovember.Theoverallannualmeanwavepowerfluxduring1994–2014isfoundtobe0.27kWm-1intheoffshoreregions.
简介:TaijiquanisamartialartofthehighestorderisculturallyetchedintheChineseheritageandentrenchedinwushupulpfictionandkungfumovies.Thereinliestheenigma.Thegentleslow-motionpracticecannotbemoreremotefromthespeedandpowerofcombat.AndaddingtothemystiqueisthepropositionthatTaijiquan'skungfuprowessisnotdrawnfromthephysicalstrengthofthemusculaturebutfromsome"innerstrength"orNeijin.ThissacredbeliefwasdesecratedwhenafighterthrashedaselfproclaimedTaijiquangrandmasterignominiouslyin10secondsinanopenmatch.Taijiquanwasthenderidedasaboguscombatart.TheincidentshakesthefoundationofTaijiquanandputsintoquestionsmanyofitstoutedclaims,whichchallengesthescientificquestoftheart.ThepaperconfrontstheissuedirectlybystudyingthemanifestationofNeijinintheframeworkofsciencetoprovideascientificbasisfortheart.Ittranscribestheyin-yangmetaphysicsthatregulatesTaijiquantrainingintermsofthealignmentofmuscleactionstobalanceandtounifymomentum,whichdevelopsthecorestrengthofNeijinandtheunderlyinglife-forceQienergy.Fromthisflowsthekungfumarvels,whichlieinthelivelinessandagilityofNeijin'sresponseandintheforceensuingthatisoftherightvectorvalues,allessentialinthefluidityofcombatapplication.ThemartialaspectofTaijiquanprovidesaconcreterepresentationofNeijin,whichgivesanexperientialinsightintothemultifacetedconceptofQi,andinturnapathwaytotheexplorationofQiinphysiologyandthusinQienergymedicine.
简介:春节过了,咱们就正式进入了“猪年”,猪是十二生肖里的最后一位,这年翻过去就又是一个新的轮回。在猪年开始没多久,咱们就在“档案馆”里做了一个稿子,讲的是人类对猪的驯化。虽然猪老是跟不好的词儿连在一起,比如“猪头猪脑”——可是猪头猪脑真的很好吃啊——不过,猪其实真算得上是人类的好朋友了,因为它在很大范围内给人类提供了食用的肉,还有可供加工的皮革,甚至是它们的猪鬃毛,都曾经是重要的军需用品呢。第二次世界大战时,枪炮、军舰、飞机等的清洁和喷漆,一样也离不开猪鬃,中国还是最大的猪鬃出口国。从猪的驯化历史,我们可以看出人类是怎么样将自然资源变为自己可用,而在不同文化背景下的人类,又是如何看待自然。
简介:摘要摩托车车架的设计在实际的研发和生产过程中,需要经过很多环节,并且摩托车的整体车身的覆盖形式和具体的零部件设计以及组装,难度非常大,在装配精度和组装位置上的关系难以得到保障,在这其中,车架的设计中某个环节要进行参数的改变,就将要对其他所有的零部件进行重新的调整和规划,因此这对于整车的生产效率和开发时效都极为不利,极易造成资金、人力和技术的浪费。所以,采用WAVE技术将很好的解决此类问题,WAVE技术将主要的整车研发到实际的组装以及中间部分的模具的使用,都能够很好的进行关联,使得在改进车身尺寸和参数的情况下,无需对其他零部件进行重新设计,会直接对其进行尺寸和参数的更新,这就将极大的提高摩托车整车的开发和组装效率。
简介:Two-dimensionalmaterialsaregeneratinggreatinterestduetotheiruniqueelectricalandopticalproperties.Inparticular,transitionmetaldichalcogenidessuchasmolybdenumdisulfide(MoS2)areattractivematerialsduetotheexistenceofadirectbandgapinthemonolayerlimitthatcanbeusedtoenhancenonlinearopticalphenomena,suchasRamanspectroscopy.Here,wehaveinvestigatedfour-wavemixingprocessesinbulkMoS2usingamultiplexcoherentanti-StokesRamanspectroscopysetup.Theobservedfour-wavemixingsignalhasaresonanceatapproximately680nm,correspondingtotheenergyoftheAexcitonictransitionofMoS2.Thisresonancecanbeattributedtotheincreasedthird-ordernonlinearsusceptibilityatwavelengthsneartheexcitonictransition.ThisphenomenoncouldopenthepathtousingMoS2asasubstrateforenhancingfour-wavemixingprocessessuchascoherentanti-StokesRamanspectroscopy.
简介:Two-monthcontinuouswaveformsof108broadbandseismicstationsinFujianProvinceanditsadjacentareasareusedtocomputenoisecross-correlationfunction(NCF).ThesignalqualityofNCFisimprovedviatheapplicationoftime-frequencyphaseweightedstacking.TheRayleighandLovewavesgroupvelocitiesbetween1s-20saremeasuredonthesymmetricalcomponentoftheNCFwiththemultiplefiltermethod.Morethan5,000Rayleighwavedispersioncurvesandabout4,000Lovewavedispersioncurvesareobtainedandusedtoinvertforgroupvelocitymaps.Thisdatasetprovidesabout50kmresolutionthatisdemonstratedwithcheckerboardtests.Consideringtheoffgreatcircleeffectininhomogeneousmedium,theraypathistracedbasedonthetraveltimefieldcomputedwithafinitedifferencemethod.Theinvertedgroupvelocitymapsshowgoodcorrelationwiththegeologicalfeaturesintheupperandmiddlecrust.TheFuzhoubasinandZhangzhoubasinshowedlowvelocityontheshortperiodgroupvelocitymaps.Onthelongperiodgroupvelocitymaps,thelowvelocityanomalyinthehighheatflowregionnearZhangzhouandclearvelocitycontrastacrosstheZhenghe-Dapufaults,whichsuggeststhattheZhenghe-Dapufaultmightbeadeepfault.
简介:ScaleeffectofISWsloadsonFloatingProductionStorageandOffloading(FPSO)isstudiedinthispaper.TheapplicationconditionsofKdV,eKdVandMCCISWstheoriesareusedinthenumericalmethod.ThedepthaveragedvelocitiesinducedbyISWsareusedforthevelocity-inletboundary.Threescalerationumericalmodelsλ=1,20and300wereselected,whichthescaleratioisthesizeratioofnumericalmodelstotheexperimentalmodel.Thecomparisonsbetweenthenumericalandformerexperimentalresultsareperformedtoverifythefeasibilityofnumericalmethod.Thecomparisonsbetweenthenumericalandsimplifiedtheoreticalresultsareperformedtodiscusstheapplicabilityofthesimplifiedtheoreticalmodelsummarizedfromtheloadexperiments.Firstly,thenumericalresultsofλ=1numericalmodelshowedagoodagreementwithformerexperimentalandsimplifiedtheoreticalresults.ItisfeasibletosimulatetheISWsloadsonFPSObythenumericalmethod.Secondly,thecomparisonsbetweentheresultsofthreescalerationumericalmodelsandexperimentalresultsindicatedthatthescaleratioshavemoresignificantinfluenceontheexperimentalhorizontalforcesthantheverticalforces.Thescaleeffectofhorizontalforcesmainlyresultsfromthedifferentviscosityeffectsassociatedwiththemodel’sdimension.Finally,throughthecomparisonsbetweenthenumericalandsimplifiedtheoreticalresultsforthreescaleratiomodels,thesimplifiedtheoreticalmodelofthepressuredifferenceandfrictionforcesexertedbyISWsonFPSOisappliedforlarge-scaleorfull-scaleFPSO.
简介:Using116earthquakesoverML3.8intheInnerMongoliaregionfrom2008to2015,thelocalearthquakemagnitudeMLandsurfacewavemagnitudeMSareremeasured.Basedonnormlinearregression(SR1andSR2)andnorm(OR)orthogonalregressionmethod,weestablishedtheconversionrelationshipbetweenMLandMS.TheresultsweretestedwithGaussiandisturbance.Theresultshowsthattheorthogonalregressionmethod(OR)resulthasthebestfittingcurve,andtheconversionrelationisMS=0.96ML-0.10.ThedifferencebetweenourresultandGuoLücan's(MS=1.13ML-1.08)maybecausedbyregionaltectoniccharacteristics.MSInnerMongoliavalueissignificantlyhigherthantheMSempiricalvalue,withanaveragedifferenceof0.23,thedifferencedistributionofempiricalrelationandtherectifiedrelationisintherangeof0.2-0.3.
简介:1997)andhasbecomeoneofthetwoflagshipsofjournalismprograms(TheotheristhejournalismprogramofthePeople’sUniversity)acrossChina.TheFudanJournalismCollegenotonlyhasitstraditionalsequenceinJournalism,thewriterhasconductedasurveyamongthejournalismstudentsaswellassomefacultymembersamongthefivejournalismprogramsinShanghaiinSeptember1999.,aconsistentprocessoflocalizationinitscurriculumandteachingmethodsaswellasitstargets.Thepaperwillfirstdiscusstheprocessoflocalizationinthe50yearsdevelopmentofjournalismeducationinChinaintermsofeducationalpurposesandchangesofcurriculum.BasedontheasurveyofthefivejournalismprogramsinShanghai
简介:APeruviannative,Dr.VelardeearnedhermedicaldegreefromtheNewYorkUniversitySchoolofMedicineinNewYorkandwentontocompleteherresidencytraininginInternalMedicineatColumbiaPresbyterianMedicalCenterandCardiovascularDiseasefellowshiptrainingatMountSinaiHospitalinNewYorkandBostonUniversity.Dr.GladysP.VelardeisAssociateProfessorofMedicine/CardiologyatTheUniversityofFlorida,JacksonvillewhereshedirectstheWomen’sCardiovascularHealthProgramandisDirectoroftheCardiovascularDiseaseFellowshiptrainingprogram.
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简介:WiththearchitecturalhistoryupontheQinghai-TibetPlateauspanningbackfourtofivethousandyears,theTibetanarchitecturehasgivenrisetothreebasicforms:palaces,monasteriesandcivilianresidences.
简介:ThomasHardy'scharactersinTheReturnoftheNativeliveinaworldgovernedbyaharshandindifferentironicGod.Hardyseesthereigningpoweroftheuniverseasbeingessentiallyunjustandmorallyblind,Hardy'spowerfulchancedeniesMrs.YeobrightandClymareunion,Hardyistellingatruthtoreaders
简介:通过对20世纪80年代以来具有代表性的华北夏谷区审(鉴)定的20个主栽谷子品种进行SSR标记多态性分析,研究了华北地区育成谷子品种的遗传多样性。49对引物在20个谷子品种中扩增出具有多态性的条带,共检测出142个等位变异,平均每个位点检测出的等位变异数为2.96个。标记位点多态性信息含量(PIC)变幅为0.0904~0.6896,平均为0.4168。20份材料间的遗传距离变幅为0.0173~0.9000,聚类分析将其分成3个类群,其中谷丰1号自成一类,表明谷丰1号的遗传距离较其他品种大。不同年代谷子品种间遗传距离分析结果显示,各年代品种之间的平均遗传距离由大到小依次是1980s>1990s>2000s>2010s,表明随着年代的递进育成品种的遗传差异减小,亲缘关系增近。