WOLFRAM SYSTEM MODELER
Life_ExpectancyLife expectancy |
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Diagram
Wolfram Language
In[1]:=
SystemModel["SystemDynamics.WorldDynamics.World3.Life_Expectancy"]
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Information
This model computes the average life expectancy of the human inhabitants of this planet as a function of their living conditions.
The life expectancy is measured in numbers of years.
This model is described on p.61 of Dynamics of Growth in a Finite World.
Parameters (3)
| hlth_serv_impact_del |
Value: 20 Type: Real (yr) Description: Health services impact delay |
|---|---|
| life_expect_norm |
Value: 28 Type: Real (yr) Description: Normal life expectancy |
| subsist_food_pc |
Value: 230 Type: Real (kg/yr) Description: Available per capita food |
Connectors (6)
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life_expectancy |
Type: MassOutPort Description: Average life expectancy of human population |
|---|---|---|
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serv_out_pc |
Type: MassInPort Description: Per capita annual expenditure in services |
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ind_out_pc |
Type: MassInPort Description: Per capita annual industrial output |
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population |
Type: MassInPort Description: Population |
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food_pc |
Type: MassInPort Description: Per capita annually consumed food |
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ppoll_index |
Type: MassInPort Description: Persistent pollution index |
Components (13)
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Life_Expectancy |
Type: Prod_5 Description: Product of five influencing factors |
|---|---|---|
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Life_Expect_Norm |
Type: Const Description: A constant factor |
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Lifet_Mult_Hlth_Serv |
Type: Lifet_Mult_Hlth_Serv Description: p.76 of Dynamics of Growth in a Finite World |
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Lifet_Mlt_Hlth_Serv_1 |
Type: Tabular Description: p.76 of Dynamics of Growth in a Finite World |
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Lifet_Mlt_Hlth_Serv_2 |
Type: Tabular Description: p.76 of Dynamics of Growth in a Finite World |
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Eff_Hlth_Serv_PC |
Type: SMTH1 Description: p.71 of Dynamics of Growth in a Finite World |
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Hlth_Serv_Al_PC |
Type: Tabular Description: p.70 of Dynamics of Growth in a Finite World |
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Lifet_Mlt_Crowd |
Type: Lifet_Mlt_Crowd Description: p.90 of Dynamics of Growth in a Finite World |
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Crowd_Mult_Ind |
Type: Tabular Description: p.90 of Dynamics of Growth in a Finite World |
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Fr_Pop_Urban |
Type: Tabular Description: p.88 of Dynamics of Growth in a Finite World |
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Lifet_Mlt_Food |
Type: Tabular Description: p.66 of Dynamics of Growth in a Finite World |
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Gain1 |
Type: Gain Description: Output the product of a gain value with the input signal |
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Lifet_Mlt_PPoll |
Type: Tabular Description: p.94 of Dynamics of Growth in a Finite World |
Used in Examples (11)
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SystemDynamics.WorldDynamics.World3 Original WORLD3 model |
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SystemDynamics.WorldDynamics.World3 More abundant non-recoverable natural resources |
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SystemDynamics.WorldDynamics.World3 More accessible non-recoverable natural resources and pollution control |
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SystemDynamics.WorldDynamics.World3 More accessible non-recoverable natural resources, pollution control, and land yield enhancement |
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SystemDynamics.WorldDynamics.World3 More accessible non-recoverable natural resources, pollution control, land yield enhancement, and erosion protection |
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SystemDynamics.WorldDynamics.World3 More accessible non-recoverable natural resources, pollution control, land yield enhancement, erosion protection, and resource efficiency |
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SystemDynamics.WorldDynamics.World3 More abundant non-recoverable natural resources and birth control |
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SystemDynamics.WorldDynamics.World3 More abundant non-recoverable natural resources, birth control, and stable industrial output |
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SystemDynamics.WorldDynamics.World3 Combining the measures of Scenarios #6 and #8 |
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SystemDynamics.WorldDynamics.World3 Influencing the future 20 years earlier |
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SystemDynamics.WorldDynamics.World3 Influencing the future 10 years later |