supported by the National Natural Science Foundation of China(NSFC)(Grant No. 41074100);the Program for New Century Excellent Talents in University of Ministry of Education of China(Grant No. NCET-10-0812)
In this paper, first we calculate finite-difference coefficients of implicit finite- difference methods (IFDM) for the first and second-order derivatives on normal grids and first- order derivatives on staggered gri...