Affiliation: | 1. Department of Applied Mathematics, National University of Kaohsiung, and Chinese Air Force Academy, Kaohsiung 811, Taiwan, ROC;2. Mathematics Faculty, National Pingtung Institute of Commerce, Pingtung 900, Taiwan, ROC;3. Department of Electrical Engineering, National Taiwan University, Taipei 106, Taiwan, ROC;4. Department of Physics, National Taiwan University, Taipei 106, Taiwan, ROC |