Package ai.libs.jaicore.search.algorithms.standard.bnb

Class BranchAndBound<N,A>

java.lang.Object

ai.libs.jaicore.basic.algorithm.AAlgorithm<I,O>

ai.libs.jaicore.basic.algorithm.ASolutionCandidateIterator<I,O>

ai.libs.jaicore.basic.algorithm.AOptimizer<I,EvaluatedSearchGraphPath<N,A,V>,V>

ai.libs.jaicore.search.core.interfaces.AOptimalPathInORGraphSearch<I,N,A,V>

ai.libs.jaicore.search.algorithms.standard.bestfirst.BestFirst<GraphSearchWithSubpathEvaluationsInput<N,A,V>,N,A,V>

ai.libs.jaicore.search.algorithms.standard.bestfirst.StandardBestFirst<N,A,java.lang.Double>

ai.libs.jaicore.search.algorithms.standard.bnb.BranchAndBound<N,A>

Type Parameters:

N -

A -

All Implemented Interfaces:

java.lang.Iterable<org.api4.java.algorithm.events.IAlgorithmEvent>, java.util.concurrent.Callable<EvaluatedSearchGraphPath<N,A,java.lang.Double>>, java.util.Iterator<org.api4.java.algorithm.events.IAlgorithmEvent>, org.api4.java.ai.graphsearch.problem.IOptimalPathInORGraphSearch<GraphSearchWithSubpathEvaluationsInput<N,A,java.lang.Double>,EvaluatedSearchGraphPath<N,A,java.lang.Double>,N,A,java.lang.Double>, org.api4.java.ai.graphsearch.problem.IPathInORGraphSearch<GraphSearchWithSubpathEvaluationsInput<N,A,java.lang.Double>,EvaluatedSearchGraphPath<N,A,java.lang.Double>,N,A>, org.api4.java.ai.graphsearch.problem.IPathSearch<GraphSearchWithSubpathEvaluationsInput<N,A,java.lang.Double>,EvaluatedSearchGraphPath<N,A,java.lang.Double>,N,A>, org.api4.java.algorithm.IAlgorithm<GraphSearchWithSubpathEvaluationsInput<N,A,java.lang.Double>,EvaluatedSearchGraphPath<N,A,java.lang.Double>>, org.api4.java.algorithm.IOptimizationAlgorithm<GraphSearchWithSubpathEvaluationsInput<N,A,java.lang.Double>,EvaluatedSearchGraphPath<N,A,java.lang.Double>,java.lang.Double>, org.api4.java.algorithm.ISolutionCandidateIterator<GraphSearchWithSubpathEvaluationsInput<N,A,java.lang.Double>,EvaluatedSearchGraphPath<N,A,java.lang.Double>>, org.api4.java.common.control.ICancelable, org.api4.java.common.control.ILoggingCustomizable, org.api4.java.common.event.IEventEmitter<java.lang.Object>, org.api4.java.common.event.IRelaxedEventEmitter

public class BranchAndBound<N,A>
extends StandardBestFirst<N,A,java.lang.Double>

Branch and Bound algorithm. The evaluations given for each node must be optimistic (lower bounds).

Nested Class Summary

Nested classes/interfaces inherited from class ai.libs.jaicore.search.algorithms.standard.bestfirst.BestFirst

BestFirst.ParentDiscarding

Field Summary

Fields inherited from class ai.libs.jaicore.search.algorithms.standard.bestfirst.BestFirst

activeJobs, additionalThreadsForNodeAttachment, ext2int, graphGenerator, nodeEvaluator, open, pathGoalTester, pendingSolutionFoundEvents, rootGenerator, solutions, successorGenerator

Constructor Summary

Constructors

Constructor	Description
BranchAndBound(org.api4.java.ai.graphsearch.problem.IPathSearchWithPathEvaluationsInput<N,A,java.lang.Double> problem, org.api4.java.ai.graphsearch.problem.pathsearch.pathevaluation.IPathEvaluator<N,A,java.lang.Double> lowerBoundComputer, int numSamplesPerNode)

Method Summary

Modifier and Type	Method	Description
static <N,A> GraphSearchWithSubpathEvaluationsInput<N,A,java.lang.Double>	encodeBoundsIntoProblem(org.api4.java.ai.graphsearch.problem.IPathSearchWithPathEvaluationsInput<N,A,java.lang.Double> problem, int numSamplesPerNode)

Methods inherited from class ai.libs.jaicore.search.algorithms.standard.bestfirst.BestFirst

afterExpansion, afterInitialization, afterSelection, beforeExpansion, beforeSelection, bootstrap, expandNextNode, getAdditionalThreadsForExpansion, getConfig, getCreatedCounter, getCurrentPathToNode, getExpandedCounter, getFValue, getFValue, getInternalRepresentationOf, getLocalVersionOfNode, getLoggerName, getNodeAnnotation, getNodeAnnotations, getNodeEvaluator, getOpen, getSolutionQueue, getTimeoutForComputationOfF, initGraph, insertNodeIntoLocalGraph, isShutdownComplete, labelNode, newNode, newNode, nextNodeExpansion, nextSolutionThatDominatesOpen, nextWithException, onFValueReceivedEvent, receiveNodeAnnotationEvent, receiveRolloutEvent, receiveSolutionCandidateAnnotationEvent, receiveSolutionCandidateEvent, registerSolution, selectNodeForNextExpansion, selectNodeForNextExpansion, setLoggerName, setOpen, setTimeoutForComputationOfF, shutdown, toDetailedString, toString

Methods inherited from class ai.libs.jaicore.search.core.interfaces.AOptimalPathInORGraphSearch

getGoalTester, getGraphGenerator, nextSolutionCandidateEvent

Methods inherited from class ai.libs.jaicore.basic.algorithm.AOptimizer

call, getBestScoreKnownToExist, getBestSeenSolution, nextSolutionCandidate, setBestSeenSolution, tellAboutBestScoreKnownToExist, updateBestSeenSolution

Methods inherited from class ai.libs.jaicore.basic.algorithm.ASolutionCandidateIterator

collectAllSolutions

Methods inherited from class ai.libs.jaicore.basic.algorithm.AAlgorithm

activate, announceTimeoutDetected, avoidReinterruptionOnShutdownOnCurrentThread, cancel, checkAndConductTermination, checkTermination, computeTimeoutAware, getActivationTime, getDeadline, getId, getInput, getListeners, getNumCPUs, getRemainingTimeToDeadline, getState, getTimeout, getTimeoutPrecautionOffset, hasNext, hasThreadBeenInterruptedDuringShutdown, interruptThreadAsPartOfShutdown, isCanceled, isShutdownInitialized, isStopCriterionSatisfied, isTimeoutDefined, isTimeouted, iterator, next, post, registerActiveThread, registerListener, resolveShutdownInterruptOnCurrentThread, setConfig, setDeadline, setMaxNumThreads, setNumCPUs, setState, setTimeout, setTimeout, setTimeoutPrecautionOffset, terminate, unregisterActiveThread, unregisterThreadAndShutdown

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.api4.java.algorithm.IAlgorithm

call, getId, getInput, getNumCPUs, getTimeout, registerListener, setMaxNumThreads, setNumCPUs, setTimeout, setTimeout

Methods inherited from interface org.api4.java.common.control.ICancelable

cancel

Methods inherited from interface org.api4.java.algorithm.ISolutionCandidateIterator

nextSolutionCandidate

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Methods inherited from interface java.util.Iterator

forEachRemaining, hasNext, next, remove

Constructor Detail

BranchAndBound

public BranchAndBound(org.api4.java.ai.graphsearch.problem.IPathSearchWithPathEvaluationsInput<N,A,java.lang.Double> problem,
                      org.api4.java.ai.graphsearch.problem.pathsearch.pathevaluation.IPathEvaluator<N,A,java.lang.Double> lowerBoundComputer,
                      int numSamplesPerNode)

Method Detail

encodeBoundsIntoProblem

public static <N,A> GraphSearchWithSubpathEvaluationsInput<N,A,java.lang.Double> encodeBoundsIntoProblem(org.api4.java.ai.graphsearch.problem.IPathSearchWithPathEvaluationsInput<N,A,java.lang.Double> problem,
                                                                                                                           int numSamplesPerNode)