First, we define the cross-mixing of 2-D stochastic process, which can depict the correlative relationship of the multiplicative and additive noise.
提出了二维噪声互可混的概念,用来体现多个二维噪声之间的相关关系;定义了特殊的二维四阶时间平均多矩谱来估计信号频率。
The modified upwind difference method is adopted to treat the two-phase entirely compressible miscible displacement in porous media.
本文采用修正迎风差分方法处理多孔介质中两相完全可压缩可混溶驱动问题,建立了差分计算格式,并证明了格式的收敛性,同时得到l2和h1误差估计,最后数值试验证明了方法的有效性。