Outdoor tests are playing a more and more significant role in R & D of automobiles, especially prompt tests done in the proving ground which can extremely shorten the period of development. That is the reason that...Outdoor tests are playing a more and more significant role in R & D of automobiles, especially prompt tests done in the proving ground which can extremely shorten the period of development. That is the reason that four proving ground have been set up in China. They are Hainan Proving Ground, Dongfeng Proving Ground, Dingyuan Proving Ground and Tongxian Proving Ground.展开更多
The coastal zone is the most concentrated area of human activities,and it is also the main accumulation zone of continental sediments,which is an ideal area for studying anthropocene sedimentary records.This study sum...The coastal zone is the most concentrated area of human activities,and it is also the main accumulation zone of continental sediments,which is an ideal area for studying anthropocene sedimentary records.This study summarizes the distribution of 239+240Pu activity,239+240Pu inventory,and 240Pu/239Pu atom ratios in the sediments of the seas and estuaries of China.Studies have shown that the distribution of 239+240Pu activity in sediments is mainly influenced by sediment properties and ocean current dynamics.Furthermore,239+240Pu activity in sediment cores has obvious peak characteristics,which can be used in sediment dating.In fact,240Pu/239Pu atom ratios indicate that the Pu in the sediments of the seas and estuaries of China mainly comes from global fallout and the Pacific Proving Grounds(PPG).Pu from the PPG enters the seas of China through the North Equatorial Current and Kuroshio intrusion current.And the contribution of Pu from the PPG in the East China Sea,the South China Sea,and the Yangtze estuary is over 40%.Moreover,Pu has been applied in the tracer of land-sea interactions and ocean dynamics,and it can be used as a background value to study the changes of Pu in the coastal zone of China in the future.展开更多
文摘Outdoor tests are playing a more and more significant role in R & D of automobiles, especially prompt tests done in the proving ground which can extremely shorten the period of development. That is the reason that four proving ground have been set up in China. They are Hainan Proving Ground, Dongfeng Proving Ground, Dingyuan Proving Ground and Tongxian Proving Ground.
基金National Science Foundation of China(41773004,41676031,and 41306047)Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection,the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)+1 种基金General Financial Grant from the China Postdoctoral Science Foundation(2016M590494)Jiangsu Postdoctoral Science Foundation(1501057C).
文摘The coastal zone is the most concentrated area of human activities,and it is also the main accumulation zone of continental sediments,which is an ideal area for studying anthropocene sedimentary records.This study summarizes the distribution of 239+240Pu activity,239+240Pu inventory,and 240Pu/239Pu atom ratios in the sediments of the seas and estuaries of China.Studies have shown that the distribution of 239+240Pu activity in sediments is mainly influenced by sediment properties and ocean current dynamics.Furthermore,239+240Pu activity in sediment cores has obvious peak characteristics,which can be used in sediment dating.In fact,240Pu/239Pu atom ratios indicate that the Pu in the sediments of the seas and estuaries of China mainly comes from global fallout and the Pacific Proving Grounds(PPG).Pu from the PPG enters the seas of China through the North Equatorial Current and Kuroshio intrusion current.And the contribution of Pu from the PPG in the East China Sea,the South China Sea,and the Yangtze estuary is over 40%.Moreover,Pu has been applied in the tracer of land-sea interactions and ocean dynamics,and it can be used as a background value to study the changes of Pu in the coastal zone of China in the future.
