Institute of Information Sciences, Academia Sinica, Taipei, Taiwan.|Institute of Information Sciences, Academia Sinica, Taipei, Taiwan.|Institute of Information Sciences, Academia Sinica, Taipei, Taiwan.|Institute of Information Sciences, Academia Sinica, Taipei, Taiwan.|Institute of Information Sciences, Academia Sinica, Taipei, Taiwan.|Institute of Information Sciences, Academia Sinica, Taipei, Taiwan.|Institute of Information Sciences, Academia Sinica, Taipei, Taiwan.|Institute of Information Sciences, Academia Sinica, Taipei, Taiwan.|Institute of Information Sciences, Academia Sinica, Taipei, Taiwan.