简介:在中华传统民族文化之中,民族传统体育是一块绚丽的瑰宝,是一片需世世代代传承下去的灿烂文明。目前高校民族传统体育文化传承出现阻滞,其原因主要包括对利益价值的过度追求;教学内容过于单一,缺乏实用性,与学生身心发展相背离;教学方法上过于关注技术教学而忽略了文化教学;人文知识学习的缺乏。应通过确立具备深厚文化内涵的高校民族传统体育教学理念;创建高校民族传统体育教学模式;借助多元化的教学手段与措施,彰显出传统文化所蕴含的底蕴与特色;创建一套具备科学性与合理性的民族传统体育教学评价体系,站在文化传承的立场上构建新的高校民族传统体育教学模式,使高校民族传统体育教育成为我国传统文化传承与发展的动力。
简介:Atthe'98shippingexpositionheldinstamford,connecticutUSAACTAMaritimepresident,richardthorsen,unveiledspeedportforthefirsttime,itisaconceptofnewcontainerterminalandoperatingsystem,whichtakesfulladvantageofnaturaltimemotionrelationshipsandthelatestcomputerandrobotictechnologies.
简介:Acomplianttowerismodeledasapartiallydry,partiallytapered,dampedTimoshenkobeamwiththesuperstructuremodeledasaneccentrictipmass,andanon-classicaldampedboundaryatthebase.Thefoundationismodeledasacombinationofalinearspringandatorsionalspring,alongwithparallellinearandtorsionaldampers(Kelvin-Voigtmodel).Thesuperstructureaddstothekineticenergyofthesystemwithoutaffectingthepotentialenergy,therebyreducingthenaturalfrequencies.Theweightofthesuperstructureactsasanaxialcompressiveloadonthebeam,reducingitsnaturalfrequenciesfurther.Theemptyspacefactorduetothetruss-typestructureofthetowerisincluded.Theeffectofsheardeformationandrotaryinertiaareincludedinthevibrationanalysis;withthenon-uniformbeammode-shapesbeingaweightedsumoftheuniformbeammode-shapessatisfyingtheendcondition.TheweightsareevaluatedbytheRayleigh-Ritz(RR)method,andverifiedusingfiniteelementmethod(FEM).Theweightofthesuperstructureactsasanaxialcompressiveloadonthebeam.Kelvin-Voigtmodelofstructuraldampingisincluded.Apartofthestructurebeingunderwater,thevirtualaddedinertiaisincludedtocalculatethewetnaturalfrequencies.Aparametricstudyisdoneforvariousmagnitudesoftipmassandvariouslevelsofsubmergence.ThecomputationalefficiencyandaccuracyoftheRayleigh-Ritzmethod,ascomparedtotheFEA,hasbeendemonstrated.Theadvantageofusingclosed-formtrialfunctionsisclearlyseenintheefficacyofcalculatingthevariousenergycomponentsintheRRmethod.
简介:针对主要海洋工程装备,特别是深水海洋工程装备,从技术研究的角度,阐述了自升式钻井平台、半潜式钻井平台、钻井船、张力腿平台、立柱式平台、浮式生产储卸油装置、海洋工程作业船、海洋工程辅助船等关键技术的技术特征及技术研究内容,以及动力定位系统、深水锚系泊系统等支撑技术的技术特征及技术研究内容。