modelElasticity
Fractional rate of change is proportional to that of the influencing stock
Extends from Interfaces.PartialCLD.CoupledSourceOrSink (Source or sink process driven by stock info output).
Information
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In a dynamic relation, a given elasticity coefficient (coefficient) implies that the fractional rate of change for an influenced stock B is proportional to the fractional rate of change for the influencing stock A, which is connected via the stockInfoInput. The factor of proportionality in this case is called the A-elasticity of B. The rate of change for the stock B that is connected to the flowPort accordingly is given by the following equation, which uses Newton's dot notation for rates:
Implementation
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Notes
- The given elasticity coefficient can optionally be multiplied by an exogenous input u.
- By setting
coefficient = 1the input u can be used to provide a variable elasticity coefficient.
See also
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| InputType | coefficient (from CoupledSourceOrSink) | 1 | Constant coefficient |
| Structural Parameters | |||
| Boolean | hasRateOutput (from FlowPort) | false | = true, if the rate is reported via real output connectors |
| Boolean | hasFactor (from CoupledSourceOrSink) | false | = true, if coefficient is to be multiplied with input u |
| Boolean | isCCR | true | = true, if the factional rate given is assumed to be a continuously compounding rate else the rate will be converted (growing.isCCR) |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| FlowPort | flowPort (from FlowPort) | Used to represent stock and flow connections | |
| Connectors.StockInfoInput | stockInfoInput (from StockInfoToFlow) | ||
| RealInput | u (from CoupledSourceOrSink) | Input of factor with regard to coffeficient |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| RealOutput | y (from FlowPort) | Output of current rate of flow | |
| RealOutput | y1 (from FlowPort) | Output of current rate of flow |
Revisions
- Introduced in v2.0.0.