By means of nonsymmetric difference schemes, we split up the space domain into several subdomains for which the solutions can be separately found and the computations can be made in parallel.

• 利用非对称差分格式，通过格式组合，将空间区域分裂成若干子区域，然后使每个子区域独立求解，且各子区域上的计算可以并行。