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aima.core.probability.temporal.ForwardStepInference Maven / Gradle / Ivy

package aima.core.probability.temporal;

import java.util.List;

import aima.core.probability.CategoricalDistribution;
import aima.core.probability.proposition.AssignmentProposition;

/**
 * * The FORWARD operator is defined by Equation (15.5).
* *
 * P(Xt+1 | e1:t+1) 
 * = αP(et+1 | Xt+1)∑xtP(Xt+1 | xt, e1:t)P(xt | e1:t)
 * = αP(et+1 | Xt+1)∑xtP(Xt+1 | xt)P(xt | e1:t) (Markov Assumption)
 * 
* * @author Ciaran O'Reilly * */ public interface ForwardStepInference { /** * The FORWARD operator is defined by Equation (15.5).
* *
	 * P(Xt+1 | e1:t+1) 
	 * = αP(et+1 | Xt+1)∑xtP(Xt+1 | xt, e1:t)P(xt | e1:t)
	 * = αP(et+1 | Xt+1)∑xtP(Xt+1 | xt)P(xt | e1:t) (Markov Assumption)
	 * 
* * @param f1_t * f1:t * @param e_tp1 * et+1 * @return f1:t+1 */ CategoricalDistribution forward(CategoricalDistribution f1_t, List e_tp1); }




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