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71.
The coupled hull, mooring and riser analysis techniques in time domain are widely recognized as the unique approach to predict the accurate global motions. However, these complex issues have not been perfectly solved due to a large number of nonlinear factors, e.g. forces nonlinearity, mooring nonlinearity, motion nonlinearity and so on. This paper investigates the coupled effects through the numerical uncoupled model, mooring coupled model and fully coupled model accounting mooring and risers based on a novel deep draft multi-spar which is especially designed for deepwater in 2009. The numerical static-offset, free-decay, wind-action tests are executed, and finally three hours simulations are conducted under 100-year return period of GOM conditions involving wave, wind and current actions. The damping contributions, response characteristics and mooring line tensions are emphatically studied. 相似文献
72.
海洋浮游藻色素分析和化学分类研究进展 总被引:4,自引:0,他引:4
综述了海洋浮游藻色素分析和化学分类研究的最新进展。指出目前以色谱柱串联技术为基础的高分辨高效液相色谱质谱联用已经成为色素分析方法的主要发展趋势。利用此方法对藻类特征色素进行再分析有助于获得对藻类色素分布的新认识。CHEMTAX是在宏观上对浮游藻进行化学分类的良好工具,采用多次运算的方式可以减少其对初始色素比值的依赖,使结果向"真实值"收敛,提高结果的准确性。指出研究以特征色素比值组合为基础的浮游藻精细化学分类方法,以及将以色素分析为基础的浮游藻化学分类应用于了解浮游藻功能类群在生源要素和生物矿物质等的生物地球化学循环过程中的作用是未来的发展趋势。 相似文献
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通过对国外各类海气耦合模式及其预报试验的综合分析,从海气耦合模式的分类、模式气候漂移和ENSO年际变化的处理、模式分辨率、耦合方式和模式参数的变化对模式年际变化的影响、ENSO年际预报与预报起始时间和资料的关系、ENSO和季风的海陆气耦合系统等方面评述了影响季和年际数值预报水平的有关问题及发展现状,并对开展我国相应试验研究工作提出了看法。 相似文献
77.
Monthly mean anomaly fields of various parameters like sea surface temperature, air temperature, wind stress, effective radiation
at the surface, heat gain over the ocean and the total heat loss between a good and bad monsoon composite and the evaporation
rates over the Arabian Sea and southern hemisphere have been studied over the tropical Indian Ocean. The mean rates of evaporation
on a seasonal scale over the Arabian Sea during a good and bad monsoon composites were equal (about 2·48 × 1010 tons/day). The evaporation rates over the southern hemisphere were greater during all the months. The mean evaporation rates
over the southern hemisphere on a seasonal scale for the good and bad monsoon composites were 4·4 × 1010 and 4·6 × 1010 tons/day respectively. The maximum evaporation rates over the southern hemisphere were observed in August. The anomalies
of wind stress, effective radiation at the surface and the heat gain over the ocean also exhibit large variations in August,
as compared to other monsoon months. 相似文献
78.
A GLOBAL COUPLED OCEAN-ATMOSPHERE MODEL OF SHALLOW WATER WAVE AND ITS NUMERICAL EXPERIMENTS 总被引:2,自引:0,他引:2
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A global coupled air-sea model of shallow water wave is developed based on coupled ocean-atmospheredynamics.The coupling is realized through the air-sea interaction process that the atmosphere acts on theocean by wind stress and the ocean acts on the atmosphere with heating proportional to sea surface temperature(SST)anomaly.The equation is harotropic primitive one.Response experiments of coupling system arealso carried out SSTA in two categories of intensities.Compared with the results of AGCM simulation ex-periment in which only the dynamic change of air system is considered,it demonstrates that the air-seainteraction between the tropical ocean and the global atmosphere plays a very important role in the evolutionof climate system.The results of numerical simulation show that it is encouraging. 相似文献
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电感耦合等离子体原子发射光谱法测定黄铁矿中微量元素 总被引:5,自引:7,他引:5
采用电感耦合等离子体原子发射光谱法检测了黄铁矿中Cd,Co,Cu,Mn,Pb,Zn和Ni。用干扰系数校正法消除黄铁矿中铁对上述元素的干扰,采用HCl-HNO3体系溶解矿样,不需化学分离,直接测定。方法已应用于国家标准物质GBW07267的测定。结果与标准值相符,相对标准偏差(n=8)为1.5%-7.3%。 相似文献