Process Controls

Y max = 250

dt

J

W

U

L

L1

L2

L3

L4

L5

L6

I

S

F

Q

K1

K2

K3

K4

K5

K6

K7

K8

TC

Regional Economy Driven by World Growth Minimodel

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Quick Test: after TC consider a time of starting chaos (DT)

New Parameters

Dt

K7

K8

Make your choice

stword

Description

The State-World Model simulates the response of a state to changes in the resources of the outside world. The world economy grows slowly before discovery and use of fossil fuels; then with abudant fuels it goes through a maximum of assets and available goods and services; and finally goes down as fuel resources decline.

Variables

  • Q = world assets
  • S = world soils
  • F = world fuels
  • W = state water
  • U = state assets

Equations

  • Q: D1 = k1*S*F*Q + k2*S*Q - k3*Q + k8*S
  • S: D2 = I - k5*S*F*Q - k6*S*Q - k7*S
  • F: D3 = - k4*S*F*Q
  • W: D4 = J - L1*W*U*Q - L3*W - L5*W
  • U: D5 = L2*U*Q*W + L4*W - L6*U - L*U

Simunlation

The graph shows the changes of S(red), F(green), Q(blue), W(orange) and U(magenta) over a time period.

Examples

  • This model can be used for any nation or state which depends on imports and exports:
  • Florida: it imports fuels and goods and exports oranges, vegetables and tourist services.
  • Japan: it imports fuels and raw products and exports finished electronic goods.

"What if" Experiments

  • If the world's sunlight is increased, how does this affect the state's growth?
  • If a new rich fuel source was discovered in about the year 2005, how would the world and state economies react?