theta s theta V s_V mu_T T r T 1 T T_1 T_2 T_max k_1 V T 2.4 -5 k_1 V T mu_T T_1 k_2 T_1 3 -3 k_2 T_1 mu_b T_2 1 -3 N mu_b T_2 k_1 V T mu_V V T T_1 T_2 N_initial time_ tau N_AZT time_ tau