22.2 Adaptive Population Control Model Equations
POPULATION(t) ¼ POPULATION(t À dt) + (NET_BIRTHS) * dt
INIT POPULATION ¼ 23.49
INFLOWS:
NET_BIRTHS ¼ (CUM_BIRTH_RATE/YEARS_RECALL-DEATH_RATE)
* POPULATION
CUM_BIRTH_RATE(t) ¼ CUM_BIRTH_RATE(t À dt) + (FRACTIONAL_BR À
OUT À FORGETTING) * dt
INIT CUM_BIRTH_RATE ¼ 1.5
TRANSIT TIME ¼ YEARS_RECALL
CAPACITY ¼ INF
INFLOW LIMIT ¼ INF
INFLOWS:
FRACTIONAL_BR ¼ REACTION_SENSITIVITY*GAP/POPULATION
OUTFLOWS:
OUT ¼ CONVEYOR OUTFLOW
FORGETTING ¼ LEAKAGE OUTFLOW
LEAKAGE FRACTION ¼ FORGETTING_RATE
LEAK ZONE ¼ 0% to 100%
A ¼ 10
DEATH_RATE ¼ GRAPH(POP_DENSITY)
(0.00, 0.1), (1.00, 0.105), (2.00, 0.125), (3.00, 0.15), (4.00, 0.195), (5.00, 0.245),
(6.00, 0.315), (7.00, 0.425), (8.00, 0.58), (9.00, 0.75), (10.0, 1.00)
DESIRED_POP ¼ GRAPH(POP_DENSITY)
Fig. 22.8
22.2 Adaptive Population Control Model Equations
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