基于四次方程的三角解法,给出了动态Kerr-Newman de Sitter黑洞的视界位置。引入局部热平衡的概念,运用改进后的brick- wall模型——薄膜模型,研究了此黑洞的熵。当把黑洞视界和宇宙视界附近一薄层物质场的熵分别看作各自视界的熵,并选...基于四次方程的三角解法,给出了动态Kerr-Newman de Sitter黑洞的视界位置。引入局部热平衡的概念,运用改进后的brick- wall模型——薄膜模型,研究了此黑洞的熵。当把黑洞视界和宇宙视界附近一薄层物质场的熵分别看作各自视界的熵,并选择与静态、稳态黑洞相同的截断因子时,计算结果与面积定理完全一致。展开更多
To solve the dimensional limitations of physical models in tests, an equivalent water depth truncated design for a classical SPAR working in 913 m water was investigated. The water depth was reduced to 736m and then t...To solve the dimensional limitations of physical models in tests, an equivalent water depth truncated design for a classical SPAR working in 913 m water was investigated. The water depth was reduced to 736m and then to 552m. As this was done, the mooting line lengths, EA value, and mass per meter were adjusted. Truncation rules and formulas for parameters and truncation factors were proposed. SPAR static characteristics were made to be consistent with those at full water depth. Then further time-domain coupled analysis was carried out for the SPAR when the mooting system experienced waves. The mooring lines were simulated by quasi-static method. Global responses and mooring line forces were found to agree well with test results for a prototype at that water depth. The truncation method proved to be robust and reliable.展开更多
文摘基于四次方程的三角解法,给出了动态Kerr-Newman de Sitter黑洞的视界位置。引入局部热平衡的概念,运用改进后的brick- wall模型——薄膜模型,研究了此黑洞的熵。当把黑洞视界和宇宙视界附近一薄层物质场的熵分别看作各自视界的熵,并选择与静态、稳态黑洞相同的截断因子时,计算结果与面积定理完全一致。
基金Supported by China National 111 Project Under Grant No.B07019
文摘To solve the dimensional limitations of physical models in tests, an equivalent water depth truncated design for a classical SPAR working in 913 m water was investigated. The water depth was reduced to 736m and then to 552m. As this was done, the mooting line lengths, EA value, and mass per meter were adjusted. Truncation rules and formulas for parameters and truncation factors were proposed. SPAR static characteristics were made to be consistent with those at full water depth. Then further time-domain coupled analysis was carried out for the SPAR when the mooting system experienced waves. The mooring lines were simulated by quasi-static method. Global responses and mooring line forces were found to agree well with test results for a prototype at that water depth. The truncation method proved to be robust and reliable.
