Iter_optimal            Iteration to find the optimal value A iteration
                        process to compute the normalization factor to
                        identify difference expression(DE) of genes
                        between different species
SCBN                    Compute the normalization factor to identify
                        difference expression (DE) of genes between
                        different species
generateDataset         Generate simulation data for different species
orthgenes               A real dataset of orthologous genes between the
                        different species.
sim_data                A simulation dataset of orthologous genes
                        between the different species.
