简介：Thispaperpresentsanimprovedunstructuredgridimmersedboundarymethod.Theadvantagesofbothimmersedboundarymethodandbodyfittedgridswhicharegeneratedbyunstructuredgridtechnologyareusedtoenhancethecomputationefficiencyoffluidstructureinteractionincomplexdomain.TheNavier-StokesequationwasdiscretizedspaciallywithcollocatedfinitevolumemethodandEulerimplicitmethodintimedomain.TherigidbodymotionwassimulatedbyimmersedboundarymethodinwhichthefluidandrigidbodyinterfaceinteractionwasdealtwithVOS(volumeofsolid)method.AnewVOScalculationmethodbasedongraphwaspresentedinwhichbothimmersedboundarypointsandcrosspointswerecollectedinarbitraryordertoformagraph.Themethodisverifiedwithflowpastoscillatingcylinder.

简介：Thescaleeffectleadstolargediscrepanciesbetweenthewakefieldsofmodel-scaleandactualships,andcausesdifferencesincavitationperformanceandexcitingforcestestsinpredictingtheperformanceofactualships.Therefore,whentestdatafromshipmodelsaredirectlyappliedtopredicttheperformanceofactualships,testresultsmustbesubjectedtoempiricalcorrections.Thisstudyproposesamethodforthereversedesignofthehullmodel.Comparedtoageometricallysimilarhullmodel,thewakefieldgeneratedbythemodifiedmodelisclosertothatofanactualship.Anon-geometricallysimilarmodelofaKoreanResearchInstituteofShipandOceanEngineering(KRISO)’scontainership(KCS)wasdesigned.Numericalsimulationswereperformedusingthismodel,anditsresultswerecomparedwithfull-scalecalculationresults.Thedeformationmethodofgettingthewakefieldoffull-scaleshipsbythenon-geometricallysimilarmodelisappliedtotheKCSsuccessfully.

简介：文章从南京青奥会的举办入手，论述了南京青奥会人文和教育精神对我国学校体育改革的影响，详细说明了南京青奥会对促进体育教育观念的转变，推进学校体育的全面改革，提高学校体育在实施素质教育和促进人的全面发展中地位与作用以及形成“大体育观”等方面的重要作用。

简介：8月18日,已圆满完成三次远洋运输任务的"河北创新"(HEBEIINNOVATOR)轮正在宁波北仑港繁忙地卸货.这艘由超大型油轮(VLCC)改造成的超大型矿砂船(VLOC)名副其实是一艘"创新"的船,因为这样的改造在世界上尚属首例,在世界航运界和造船界引起了很大反响.据中国船级社广州分社副总工程师张宇介绍,"大型船舶的改装风险是相当大的,技术难度非常高.可以说,这样的改造比建造一艘同尺度的新船要更加困难."那么,是何种因素促使河北远洋运输股份有限公司(以下简称"河北远洋")进行这样一次史无先例的改装呢?

简介：一、进一步认真学习、深刻领会、全面宣传贯彻落实全教会精神，是进一步增强学校改革的责任感和紧迫感，全面搞好学校下一步各项改革工作的关键问题这次党中央、国务院在北京召开的全国教育工作会议，是在我国即将胜利进入２１世纪之际，党中央、国务院从我国社会主义现代...