edu.memphis.ccrg.lida.framework.strategies
Class SigmoidDecayStrategy
java.lang.Object
edu.memphis.ccrg.lida.framework.strategies.StrategyImpl
edu.memphis.ccrg.lida.framework.strategies.SigmoidDecayStrategy
- All Implemented Interfaces:
- Initializable, DecayStrategy, Strategy, java.io.Serializable
public class SigmoidDecayStrategy
- extends StrategyImpl
- implements DecayStrategy
Default implementation of sigmoid decay. Uses two parameters in activation calculation.
Can pass these parameters when the strategy is initialized. (see factoriesData.xml).
Alternatively, parameters can be passed in the decay method call.
Formula used: 1 / (1 + exp(-a* x + c))
- Author:
- Javier Snaider & Ryan
- See Also:
- Serialized Form
Method Summary |
double |
decay(double currentActivation,
long ticks,
java.util.Map<java.lang.String,? extends java.lang.Object> params)
|
double |
decay(double currentActivation,
long ticks,
java.lang.Object... params)
Decays the current activation according to some internal decay function. |
void |
init()
This is a convenience method to initialize this Object. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SigmoidDecayStrategy
public SigmoidDecayStrategy()
init
public void init()
- Description copied from interface:
Initializable
- This is a convenience method to initialize this Object. It is called from init(Map parameters).
Subclasses can overwrite this method in order to initialize this Object. But make sure to call super.init();
at the beginning of the implementation of this method.
- Specified by:
init
in interface Initializable
- Overrides:
init
in class StrategyImpl
decay
public double decay(double currentActivation,
long ticks,
java.lang.Object... params)
- Description copied from interface:
DecayStrategy
- Decays the current activation according to some internal decay function.
- Specified by:
decay
in interface DecayStrategy
- Parameters:
currentActivation
- activation of the entity before decay.ticks
- The number of ticks to decay.params
- optional parameters
- Returns:
- new activation
decay
public double decay(double currentActivation,
long ticks,
java.util.Map<java.lang.String,? extends java.lang.Object> params)
- Specified by:
decay
in interface DecayStrategy
- Parameters:
currentActivation
- activation of the entity before decay.ticks
- how much time has passed since last decayparams
- parameters
- Returns:
- new activation amount