Authors´ reply

The authors appreciate the comments by O. Ozgun et al. with respect to our recent paper. The description about the experiment of the characteristic basis finite-element method (CBFEM) approach in the paper may not be clear enough, which may probably lead to some misunderstandings. What the authors tried to show was that the accuracy and efficiency of the CBFEM approach depends on the way of domain partitions. The 0.01 singular value decomposition (SVD) threshold was selected based on experiences in circuit analysis. Under this SVD threshold, the result is accurate enough while it leads to more characteristic basis functions (CBFs), but much less accuracy. This is majorly due to the singular electric field along the domain interface of Partition 1, which needs much more CBFs for the approximation.