Model Mathematics

Component: environment

Component: P

ddtimeP=aQ-bPK+P

Component: P_star

P_star=V_4V_31+2K_31+2K_4

Component: Q

ddtimeQ=V_11-QK_1+1-Q-V_2RQK_2+Q

Component: R

ddtimeR=PV_31-RK_3+1-R-V_4RK_4+R

Component: R_star

R_star=V_1V_21+2K_21+2K_1