We take the logarithm of FSR 3 Although there have been many existing works in this direction (Lua and Gan, 1994;Chien, 1997;Sun et al., 1998;Zhang et al., 2000;SUN et al., 2004), we have to skip the details of comparing MI due to the length limitation of this paper.
our experiments with MI provide no evidence against the conclusions in this paper.