2012.8.16 kmeans reg_sim
2012.10.18 kmeans reg_sim
2012.10.25 kmeans rand_sim
2012.10.30 kmeans rand_sim
2013.2.28 kmeans rand_sim
2013.8.29 kmeans rand_sim
2013.9.11 kmeans rand_sim
add R_P_AP.py