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划船
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作者 李纳米 《小学阅读指南(低年级版)》 2009年第4期38-38,共1页
今天,我和爸爸妈妈去水上公园玩了。你知道水上公园什么最好玩吗?告诉你吧,划船最好玩。
关键词 小学 作文 语文教学 《划船》 李纳米
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影响赛艇运动成绩的周边因素探讨 被引量:7
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作者 李辉 《武汉体育学院学报》 CSSCI 北大核心 1998年第4期60-64,共5页
影响赛艇训练、比赛的因素很多,其中包括来自于医学、哲学、社会学等方面的周边因素。本文就诸多方面的周边因素进行探讨。
关键词 赛艇 核心因素 周边因素 社会学
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A second order volume of fluid (VOF) scheme for numerical simulation of 2-D breaking waves 被引量:1
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作者 ZONG Zhi DONG Guo-hai 《Journal of Marine Science and Application》 2007年第2期1-5,共5页
Among all environmental forces acting on ocean structures and marine vessels, those resulting from wave impacts are likely to yield the highest loads. Being highly nonlinear, transient and complex, a theoretical analy... Among all environmental forces acting on ocean structures and marine vessels, those resulting from wave impacts are likely to yield the highest loads. Being highly nonlinear, transient and complex, a theoretical analysis of their impact would be impossible without numerical simulations. In this paper, a pressure-split two-stage numerical algorithm is proposed based on Volume Of Fluid (VOF) methodology. The algorithm is characterized by introduction of two pressures at each half and full cycle time step, and thus it is a second-order accurate algorithm in time. A simplified second-order Godunov-type solver is used for the continuity equations. The method is applied to simulation of breaking waves in a 2-D water tank, and a qualitative comparison with experimental photo observations is made. Quite consistent results are observed between simulations and experiments. Commercially available software and Boundary Integral Method (BIM) have also been used to simulate the same problem. The results from present code and BIM are in good agreement with respect to breaking location and timing, while the results obtained from the comrnercial software which is only first-order accurate in time has clearly showed a temporal and spatial lag, verifying the need to use a higher order numerical scheme. 展开更多
关键词 VOF breaking wave SECOND-ORDER ALGORITHM numerical simulation
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Automatic Generation of the Planning Tunnel High Speed Craft Hull Form 被引量:4
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作者 Morteza Ghassabzadeh Hassan Ghassemi 《Journal of Marine Science and Application》 2012年第4期453-461,共9页
The creation of geometric model of a ship to determine the characteristics of hydrostatic and hydrodynamic, and also for structural design and equipments arrangement are so important in the ship design process. Planni... The creation of geometric model of a ship to determine the characteristics of hydrostatic and hydrodynamic, and also for structural design and equipments arrangement are so important in the ship design process. Planning tunnel high speed craft is one of the crafts in which, achievement to their top speed is more important. These crafts with the use of tunnel have the aero-hydrodynamics properties to diminish the resistance, good sea-keeping behavior, reduce slamming and avoid porpoising. Because of the existence of the tunnel, the hull form generation of these crafts is more complex and difficult. In this paper, it has attempted to provide a method based on geometry creation guidelines and with an entry of the least control and hull form adjustment parameters, to generate automatically the hull form of plarming tunnel craft. At first, the equations of mathematical model are described and subsequent, three different models generated based on present method are compared and analyzed. Obviously, the generated model has more application in the early stages of design. 展开更多
关键词 planning tunnel craft hull form automatic generation high speed craft
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岁月留声
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作者 缪新构 《现代音响技术》 2005年第3期102-102,共1页
“河里青蛙从哪里来?是从那水田向河里游来……哎哟妈妈。你可不要对我生气!年轻人就是这样相爱。”如此熟悉的歌词对于“有点年纪”的听众一定不会陌生!“哎哟妈妈”的哼唱在相当长的一段时间内作为。娱乐切口”经常挂在处在变革中的... “河里青蛙从哪里来?是从那水田向河里游来……哎哟妈妈。你可不要对我生气!年轻人就是这样相爱。”如此熟悉的歌词对于“有点年纪”的听众一定不会陌生!“哎哟妈妈”的哼唱在相当长的一段时间内作为。娱乐切口”经常挂在处在变革中的年轻人的嘴上。可谓“历史悠久”,也是一种朴素的娱乐烙印! 展开更多
关键词 唱片评论 陈蓉蓉 《划船歌》 《星星索》
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Comparison of the "Global Levy Scheme" with the "Emissions Trading Scheme" to Reduce Greenhouse Gas Shipping Emissions
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作者 Constantinos Giziakis Alexandros Markos Goulielmos Anastasia Christodoulou 《Journal of Environmental Science and Engineering(B)》 2014年第2期91-108,共18页
Climate change is widely recognized as the major environmental problem facing the globe today. One of the most urgent environmental problems facing shipping industry is the reduction of GHG (greenhouse gas) emission... Climate change is widely recognized as the major environmental problem facing the globe today. One of the most urgent environmental problems facing shipping industry is the reduction of GHG (greenhouse gas) emissions from its operations. Given the growing concern of the international community on "the deep reduction of global GHG emissions", it cannot be expected that the non-regulation of maritime GHG emissions can further continue. This paper investigates the main challenges and threats of the development of two MBMs (market-based measures) for the reduction of GHG emissions from international shipping, i.e., the "global levy scheme on maritime GHG emissions" and the "maritime emission trading scheme". A SWOT (strengths weaknesses opportunities threat) analysis is used, in this survey, to evaluate the environmental effectiveness as well as the easiness of implementation of the two policy options. Moreover, we make apparent their strengths and weaknesses concerning abatement of maritime GHG emissions. Given the fact that the discussion regarding the implementation of some MBMs with maritime GHG-emission reduction potential is still carried out with the exception of EEDI (energy efficiency design index) and SEEMP (ship energy efficiency management plan), this paper's results present special significance, as they could be further analyzed and taken into account during the adoption of any future MBM for the reduction of maritime GHG emissions. 展开更多
关键词 Measures reducing GHG emissions SHIPPING SWOT analysis GLS (global levy scheme) METS (maritime emission trading scheme) IMO (International Maritime Organization).
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Economic Viability of Mega-size Containership in Different Service Networks
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作者 陈飞儿 张仁颐 《Journal of Shanghai Jiaotong university(Science)》 EI 2008年第2期221-225,共5页
The mega-size containership viability was analyzed by considering different service networks for different ship sizes:hub-and-spoke and multi-port-calling (MPC) networks for mega-size containerships and conventional s... The mega-size containership viability was analyzed by considering different service networks for different ship sizes:hub-and-spoke and multi-port-calling (MPC) networks for mega-size containerships and conventional ships.A model was proposed,which quantifies the economies of scale in operating large con- tainerships and constructs models for ship routing under different service networks.A sensitivity analysis was conducted to test the effect of feeder costs and the results analyzed to determine optimal containership size with respect to different operational scenarios.Throughout model applications for Asia-Europe and Asia-North America trades,the mega-size containership is competitive in all scenarios for Asia-Europe,while it is viable for Asia-North America only when the feeder costs are low. 展开更多
关键词 mega-size containership hub-and-spoke networks mathematical programming sensitivity analysis
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划船
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作者 李纳米 《小学生导刊(低年级版)》 2009年第6期45-45,共1页
我们一家来到水上公园,坐上小船。我在左边划,爸爸在右边划。小船不停地转圈,就是不往前走。原来呀,我力气小,划得慢;爸爸力气大,划得快。
关键词 小学 作文 语文教学 《划船》 李纳米
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划船
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作者 李纳米 《小学生时空(汉)》 2009年第1期76-76,共1页
水上公园里的船可真多,有小白船、小黄船、小鸭船,还有电动船。我们划的是小鸭船,爸爸坐在船头,妈妈坐在船尾,我坐在船中央。我在左边划,爸爸在右边划。可是我和爸爸使尽了力气往后划,船却不停地转圈圈,就是不往前走。
关键词 小学 作文 语文教学 《划船》 李纳米
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划船
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作者 李纳米 《小星星(阅读100分)(小学1-3年级)》 2009年第1期74-74,共1页
水上公园里的船可真多,有小白船、小黄船、小鸭船,还有电动船。我们划的是小鸭船,爸爸坐在船头,妈妈坐在船尾,我坐在船中央。我在左边划,爸爸在右边划。划船的师傅告诉我们,往后划,船才会往前走。可是我和爸爸都使尽了力气往后... 水上公园里的船可真多,有小白船、小黄船、小鸭船,还有电动船。我们划的是小鸭船,爸爸坐在船头,妈妈坐在船尾,我坐在船中央。我在左边划,爸爸在右边划。划船的师傅告诉我们,往后划,船才会往前走。可是我和爸爸都使尽了力气往后划,船却不停地转圈圈,就是不往前走。原来呀,我力气小,划得慢;爸爸力气大、划得快。我和爸爸划的速度不一致,船怎么能前进呢? 展开更多
关键词 小学 作文 《划船》 李纳米
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划船乐
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作者 顾斌 高智华(指导老师) 《小学生阅读与写作(四年级版)》 2009年第7期62-63,共2页
上周,我参加学校组织的围棋竞赛,获得了年级第一名,爸爸为了奖赏我,决定带我去公园划船,我激动得一蹦三尺局。
关键词 小学 作文 语文教学 《划船乐》
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等待 命运——凯尔泰斯获奖有感 被引量:3
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作者 刘学思 《外国文学》 CSSCI 北大核心 2003年第1期19-22,共4页
关键词 匈牙利 诺贝尔文学奖 2002年 凯尔泰斯·伊姆雷 小说 文学翻译 《划船苦力的日记》 写作生涯 大屠杀主题 《无形的命运》
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Injury prevention, performance and return to sport: How can science help?
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作者 Alison H. McGregor 《Chinese Journal of Traumatology》 CAS CSCD 2017年第2期63-66,共4页
The margins in elite sport are becoming increasingly smaller particularly in timed sporting events forcing the limits of perfor- mance to be pushed further. Although traditionally only the phys- iological and physical... The margins in elite sport are becoming increasingly smaller particularly in timed sporting events forcing the limits of perfor- mance to be pushed further. Although traditionally only the phys- iological and physical attributes of performance were considered, there is growing awareness of a range of factors including but not limited to; the performance culture including the team environ- ment, athlete coach relationship, facilities etc; specific physical attributes and skills for each sports; mental skills such as confi- dence, resilience, motivation etc; technical skills including agility, coordination; tactical skills and finally lifestyle skills including nutrition, well-being, and recovery. 展开更多
关键词 RowingBiomechanicsLow back painHuman and equipment interactions
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Technical advancements and significance of circumlunar return and reentry spacecraft 被引量:7
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作者 YANG Meng Fei ZHANG Wu +1 位作者 PENG Jing ZHANG Gao 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2015年第4期738-745,共8页
As one of the vital steps in the 3rd phase of China's lunar exploration program (CLEP), the circumlunar return and reentry spacecraft, developed by China Academy of Space Technology (CAST), is used to demonstrate... As one of the vital steps in the 3rd phase of China's lunar exploration program (CLEP), the circumlunar return and reentry spacecraft, developed by China Academy of Space Technology (CAST), is used to demonstrate the key technologies of by- per-speed return and reentry spacecraft. The system configuration and flight process are presented in this paper, as well as the analysis of mission characteristics, the key technologies and the technical advancement during the R&D progress. The significance of circumlunar return and reentry spacecraft is given at the end. 展开更多
关键词 circumlunar return skip reentry technical advancement China's lunar exploration program (CLEP)
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