hierarchical basis造句

for solving the corresponding discretization equation, there are few re-sults on the construction of efficient solvers . most existing results only presented the related error estimate for a concrete problem discretized by covolume methods . in this paper, hierarchical basis method, domain decomposition method and precondtioned gmres method are constructed
并且大部分已有研究结果均集中于给出对某一具体问题用有限体积法离散后的误差估计，而对于如何高效求解其离散方程，这一无论从理论上讲，还是从实际应用角度出发都具有重要意义和巨大实用价值的问题，目前这方面的研究结果还很少。
It's difficult to find hierarchical basis in a sentence. 用hierarchical basis造句挺难的