[1] NATL TAIWAN NORMAL UNIV,DEPT PHYS,TAIPEI,TAIWAN
[2] NATL TSINGHUA UNIV,INST PHYS,HSINCHU,TAIWAN
[3] CHUNG CHEN INST TECHNOL,DEPT PHYS,TAOYUAN,TAIWAN
[4] UNIV SOOCHOW,DEPT PHYS,SOOCHOW,TAIWAN
[5] FENG CHIA COLL ENGN & BUSINESS,DEPT ELECTR ENGN,FENG CHIA,TAIWAN