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Atsuo Hara
Department of Electronics Engineering, Chiba Institute of Technology, 2–17–1, Tsudanuma, Narashino, 275–0016 Japan
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Liang Tao
Department of Electronics Engineering, Chiba Institute of Technology, 2–17–1, Tsudanuma, Narashino, 275–0016 Japan
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Tsutomu Watanabe
Department of Civil Engineering, Chiba Institute of Technology, 2–17–1, Tsudanuma, Narashino, 275–0016 Japan
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Seiichi Motooka
Department of Electronics Engineering, Chiba Institute of Technology, 2–17–1, Tsudanuma, Narashino, 275–0016 Japan