国家重点实验室 BEC N=220 0.8 54 0.1 0.2 0.4 0.6 0.8 Normalized channel index 27 BEC 27 N=220 0 0.2 0.4 0.6 0.8 1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Normalized channel index Symetric Capacity