1. Graduate Institute of Environmental Engineering, National Taiwan University, Number 1, Section 4, Roosevelt Road, Taipei 106, Taiwan, Department of Environmental Engineering, National I-Lan University, Number 1, Section 1, Shen-Lung Road, I-Lan 260, Taiwan, and Department of International Trade, Chung Yuan Christian University, Number 200, Chung-Pei Road, Chung-Li 320, Taiwan