The higher order moment method is widely applied in the computational electromagnetics.In order to compute the electrically massive problems,this paper introduces a parallel adaptive cross approximation algorithm(ACA)to accelerate the higher order moment method.At first,the non-uniform rational B-Splines modeling(NURBS)is applied to divide the patches into groups.Then the ACA algorithm is used to compress the impedance matrix in the far zone,which is low in rank.Finally,the conjugate gradient method(CG)comb...