Three-dimensional(3-D)power prediction method from model test has been widely accepted and used for many years.Form factor k is the most important characteristics of 3・D method and very crucial to the accurate power p...Three-dimensional(3-D)power prediction method from model test has been widely accepted and used for many years.Form factor k is the most important characteristics of 3・D method and very crucial to the accurate power prediction.However,it's rather difficult to get the accurate value of k for those ships with pronounced bulbous or large transom from model test.In this paper,a new method to predict power is proposed,using k from CFD while other data from model test(or experimental fluid dynamics(EFD)).Delivered power prediction using the combination of CFD/EFD method agrees well with sea-trial results.展开更多
In this study, we compared the biodiversity and ecological status of macrobenthos between 2001 and 2011 in terms of species composition, dominant species, abundance, biomass, diversity, and secondary productivity of m...In this study, we compared the biodiversity and ecological status of macrobenthos between 2001 and 2011 in terms of species composition, dominant species, abundance, biomass, diversity, and secondary productivity of macrobenthos in the Yellow Sea and East China Sea. The results indicate that the species abundances, biomass, and diversity in spring 2011 were all lower than those in autumn 2000 and spring of 2001. Most of the dominant species have changed from 2001 to 2011, with the exception of the echinoderm Ophiura sarsii vadicola that was dominant in these years. Small-sized animal species have increased possibly due to gradual environment deterioration such as the pollution and the climate warmer.展开更多
文摘Three-dimensional(3-D)power prediction method from model test has been widely accepted and used for many years.Form factor k is the most important characteristics of 3・D method and very crucial to the accurate power prediction.However,it's rather difficult to get the accurate value of k for those ships with pronounced bulbous or large transom from model test.In this paper,a new method to predict power is proposed,using k from CFD while other data from model test(or experimental fluid dynamics(EFD)).Delivered power prediction using the combination of CFD/EFD method agrees well with sea-trial results.
基金supported by the National Basic Research Program of China(2011CB403605)the National Natural Science Foundation of China(41176133)the Strategic Priority Research Programme of the Chinese Academy of Sciences(XDA11020303)
文摘In this study, we compared the biodiversity and ecological status of macrobenthos between 2001 and 2011 in terms of species composition, dominant species, abundance, biomass, diversity, and secondary productivity of macrobenthos in the Yellow Sea and East China Sea. The results indicate that the species abundances, biomass, and diversity in spring 2011 were all lower than those in autumn 2000 and spring of 2001. Most of the dominant species have changed from 2001 to 2011, with the exception of the echinoderm Ophiura sarsii vadicola that was dominant in these years. Small-sized animal species have increased possibly due to gradual environment deterioration such as the pollution and the climate warmer.
