针对内孤立波对固定海域中工作浮式生产储油卸油装置(floating production storage and offloading,FPSO)造成的危害,运用数值模拟方法分析FPSO受到内孤立波载荷情况。首先,构建与实验水槽尺寸一致的数值水槽,将FPSO沿吃水方向划分为不...针对内孤立波对固定海域中工作浮式生产储油卸油装置(floating production storage and offloading,FPSO)造成的危害,运用数值模拟方法分析FPSO受到内孤立波载荷情况。首先,构建与实验水槽尺寸一致的数值水槽,将FPSO沿吃水方向划分为不同分层的数值模型,研究在不同分层模型的内孤立波波形生成情况;然后,分析不同分层模型模拟的FPSO所受到的内孤立波载荷情况;最后,分析了FPSO周围流场情况。研究结果表明:利用五层模型所模拟的内孤立波与eKdV理论解一致性较好;利用五层网格模型和七层网格模型所获得的FPSO内孤立波载荷与实验结果更接近。综合计算结果一致度和计算成本考虑,认为五层网格数值模型更适用之后的载荷成分分解及理论预报模型研究。展开更多
In this paper we use trellis coded amplitude modulation (TC-AM) as models to analyze the receivers with intersymbol interference (ISI) under BPSK and π/4-QPSK modulations.Using the modified generating function and th...In this paper we use trellis coded amplitude modulation (TC-AM) as models to analyze the receivers with intersymbol interference (ISI) under BPSK and π/4-QPSK modulations.Using the modified generating function and the weight profile function of the TC-AM,the bit error probability for both cases is evaluated in the sense of maximum likelihood decoding.The numerical result is given.展开更多
文摘针对内孤立波对固定海域中工作浮式生产储油卸油装置(floating production storage and offloading,FPSO)造成的危害,运用数值模拟方法分析FPSO受到内孤立波载荷情况。首先,构建与实验水槽尺寸一致的数值水槽,将FPSO沿吃水方向划分为不同分层的数值模型,研究在不同分层模型的内孤立波波形生成情况;然后,分析不同分层模型模拟的FPSO所受到的内孤立波载荷情况;最后,分析了FPSO周围流场情况。研究结果表明:利用五层模型所模拟的内孤立波与eKdV理论解一致性较好;利用五层网格模型和七层网格模型所获得的FPSO内孤立波载荷与实验结果更接近。综合计算结果一致度和计算成本考虑,认为五层网格数值模型更适用之后的载荷成分分解及理论预报模型研究。
文摘In this paper we use trellis coded amplitude modulation (TC-AM) as models to analyze the receivers with intersymbol interference (ISI) under BPSK and π/4-QPSK modulations.Using the modified generating function and the weight profile function of the TC-AM,the bit error probability for both cases is evaluated in the sense of maximum likelihood decoding.The numerical result is given.
