近年来，自然边界元方法已在求解偏微分方程问题方面取得了许多研究成果.它可以直接求解具有特殊边界（如圆、圆弧、椭圆、椭圆弧、球、椭球等）的偏微分方程问题，也可以和有限...

This paper explains that using parody in advertising slogans is an imitation through specific examples. This kind of imitation is through different sorts and combinations of languages, just like human gene sequencing and composition. In the ...