We compare the characteristics of Circumpolar Deep Water(CDW)in the Amundsen Sea based on Conductivity-Temperature-Depth(CTD)records in the World Ocean Database.There are considerable numbers of ship-based CTD casts i...We compare the characteristics of Circumpolar Deep Water(CDW)in the Amundsen Sea based on Conductivity-Temperature-Depth(CTD)records in the World Ocean Database.There are considerable numbers of ship-based CTD casts in the year 1994,2000,2007 and 2009.After confining temporal-and spatial-windows,several stations are emerged as having at-least two casts in different years.The comparisons show that the CDWs turn warmer and salter on shelf and near ice shelf.The results therefore describe the geographic differences of CDW changes,and exhibit rareness of ship-based CTD survey in the Amundsen Sea.展开更多
Based on the capacity/demand(C/D)analysis of bridge components,and life cycle and performance based seismic design principles,a practical approach is developed for the seismic performance evaluation of super-long span...Based on the capacity/demand(C/D)analysis of bridge components,and life cycle and performance based seismic design principles,a practical approach is developed for the seismic performance evaluation of super-long span cable-stayed bridges.According to the approach,the seismic performance evaluation of the Sutong Bridge,which is a cable-stayed bridge with a main span of 1 088 m,is completed,and the practicality of the approach is validated.The earthquake resistance level for super-long span cable-stayed bridges is discussed,including the earthquake level,its corresponding structural performance and check indices.And a set of formula for capacity/demand ratio calculation of bridge components is proposed.展开更多
基金financially supported by National Polar Special Program“Impact and Response of Antarctic Seas to Climate Change”(Grant nos.IRASCC 01-01-01B,02-01-02).
文摘We compare the characteristics of Circumpolar Deep Water(CDW)in the Amundsen Sea based on Conductivity-Temperature-Depth(CTD)records in the World Ocean Database.There are considerable numbers of ship-based CTD casts in the year 1994,2000,2007 and 2009.After confining temporal-and spatial-windows,several stations are emerged as having at-least two casts in different years.The comparisons show that the CDWs turn warmer and salter on shelf and near ice shelf.The results therefore describe the geographic differences of CDW changes,and exhibit rareness of ship-based CTD survey in the Amundsen Sea.
基金National Key Technologies R&D Program(No.2006BAG04B01),research on technical standards,key structures and their characteristics of kilometer-magnitude cable-stayed bridges
文摘Based on the capacity/demand(C/D)analysis of bridge components,and life cycle and performance based seismic design principles,a practical approach is developed for the seismic performance evaluation of super-long span cable-stayed bridges.According to the approach,the seismic performance evaluation of the Sutong Bridge,which is a cable-stayed bridge with a main span of 1 088 m,is completed,and the practicality of the approach is validated.The earthquake resistance level for super-long span cable-stayed bridges is discussed,including the earthquake level,its corresponding structural performance and check indices.And a set of formula for capacity/demand ratio calculation of bridge components is proposed.
