This paper, for the first time, deals with a more systematic study of the structures in the Bohai petroliferous area that covers nearly one third of the Bohai Bay basin. The study mainly involves the effects of preexi...This paper, for the first time, deals with a more systematic study of the structures in the Bohai petroliferous area that covers nearly one third of the Bohai Bay basin. The study mainly involves the effects of preexisting basement faults on the basin formation, the characteristics of basin geometry and kinetics, the modelling of the tectonic-thermal history, the polycyclicity and heterogeneity in the structural evolution and the natural seismic tomographic images of the crust and upper mantle. The authors analyze the features of the dynamic evolution of the basin in the paper and point out that the basin in the Bohai petroliferous area is an extensional pull-apart basin.展开更多
文摘双基地多输入多输出(Multiple-Input Multiple-Output, MIMO)雷达阵元故障会导致三阶观测张量中出现缺失切片数据,严重影响目标角度估计性能。为此,提出一种基于原子范数的阵元故障MIMO雷达差分共阵角度估计方法。首先,对MIMO雷达三阶观测张量进行PARAFAC分解得到收发阵列的不完整因子矩阵;然后,利用收发阵列的因子矩阵分别获得发射和接收差分共阵的导向矩阵,并利用差分共阵的冗余度对故障阵元缺失数据进行填充,从而得到等效虚拟收发阵列的虚拟因子矩阵;最后,为了填补等效虚拟阵列中的空洞,分别对等效虚拟收发阵列的虚拟因子矩阵建立原子范数约束下的低秩矩阵重构模型,并将其表述为半正定规划(Semi-definite Programming, SDP)问题,利用交替方向乘子法(Alternating Direction Method of Multipliers, ADMM)求解该矩阵重构模型。仿真结果表明,所提方法可以有效重构出不完整因子矩阵中的缺失数据,从而改善MIMO雷达阵元故障下的角度估计性能。
文摘This paper, for the first time, deals with a more systematic study of the structures in the Bohai petroliferous area that covers nearly one third of the Bohai Bay basin. The study mainly involves the effects of preexisting basement faults on the basin formation, the characteristics of basin geometry and kinetics, the modelling of the tectonic-thermal history, the polycyclicity and heterogeneity in the structural evolution and the natural seismic tomographic images of the crust and upper mantle. The authors analyze the features of the dynamic evolution of the basin in the paper and point out that the basin in the Bohai petroliferous area is an extensional pull-apart basin.
