A single image super resolution method based on cross residual network and wavelet transform. - Kwang-Chol Ri; Chol-Jin Kim (Int. J. Wavelets Multiresolution Inf. Process., 2023)

A data envelopment analysis-based clustering approach under dynamic situations. - Nam Hyok Kim; Feng He; Hongjie Zhang; Kwon Ryong Hong; Kwang-Chol Ri (Eur. J. Oper. Res., 2023)