Package org.goplanit.assignment.ltm.sltm.loading

Class StaticLtmLoadingPath

java.lang.Object

org.goplanit.assignment.ltm.sltm.loading.StaticLtmNetworkLoading

org.goplanit.assignment.ltm.sltm.loading.StaticLtmLoadingPath

public class StaticLtmLoadingPath
extends StaticLtmNetworkLoading

The path based network loading scheme for sLTM

Author:

markr

Field Summary

Fields inherited from class org.goplanit.assignment.ltm.sltm.loading.StaticLtmNetworkLoading

convergenceAnalyser, flowAcceptanceGapFunction, inFlowOutflowData, networkLoadingFactorData, prevIterationFinalSolutionScheme, receivingFlowData, receivingFlowGapFunction, sendingFlowData, sendingFlowGapFunction, settings, solutionScheme, splittingRateData

Constructor Summary

Constructors

Constructor	Description
StaticLtmLoadingPath(IdGroupingToken idToken, long assignmentId, StaticLtmSettings settings)	constructor

Method Summary

Modifier and Type	Method	Description
protected void	activateEligibleSplittingRateTrackedNodes()	In a path based implementation, tracked nodes overlap with potentially blocking nodes.
protected void	networkLoadingLinkSegmentInflowUpdate(double[] linkSegmentFlowArrayToFill)	Conduct a network loading to compute updated inflow rates (without tracking turn flows): Eq.
protected Map<Integer,Double>	networkLoadingTurnFlowUpdate()	Conduct a network loading to compute updated turn inflow rates u_ab: Eq.
void	updateOdPaths(OdPaths odPaths)	Update the od paths to use in the loading

Methods inherited from class org.goplanit.assignment.ltm.sltm.loading.StaticLtmNetworkLoading

activateAllUsedNodeSplittingRates, activateNextExtension, getActivatedSolutionScheme, getCurrentFlowAcceptanceFactors, getCurrentInflowsPcuH, getCurrentOutflowsPcuH, getOdDemands, getSettings, getSplittingRateData, getSupportedMode, getTransportNetwork, getUsedNetworkLayer, initialiseInputs, isConverging, isIterativeSendingFlowUpdateActivated, isTrackAllNodeTurnFlows, populateForPersistence, reset, resetIteration, stepFiveCheckNetworkLoadingConvergence, stepFourOutflowReceivingFlowUpdate, stepOneSplittingRatesUpdate, stepThreeSplittingRateUpdate, stepTwoInflowSendingFlowUpdate, stepZeroIterationInitialisation, updatePotentiallyBlockingNodes, validateInputs

Methods inherited from class java.lang.Object

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

Constructor Detail

StaticLtmLoadingPath

public StaticLtmLoadingPath(IdGroupingToken idToken,
                            long assignmentId,
                            StaticLtmSettings settings)

constructor

Parameters:

idToken - to use

assignmentId - to use

settings - to use

Method Detail

networkLoadingTurnFlowUpdate

protected Map<Integer,Double> networkLoadingTurnFlowUpdate()

Conduct a network loading to compute updated turn inflow rates u_ab: Eq. (3)-(4) in paper. We only consider turns on nodes that are tracked or activated to reduce computational overhead.

Specified by:

networkLoadingTurnFlowUpdate in class StaticLtmNetworkLoading

Returns:

acceptedTurnFlows (on potentially blocking nodes) where key comprises a combined hash of entry and exit edge segment ids and value is the accepted turn flow v_ab

networkLoadingLinkSegmentInflowUpdate

protected void networkLoadingLinkSegmentInflowUpdate(double[] linkSegmentFlowArrayToFill)

Conduct a network loading to compute updated inflow rates (without tracking turn flows): Eq. (3)-(4) in paper

Specified by:

networkLoadingLinkSegmentInflowUpdate in class StaticLtmNetworkLoading

Parameters:

linkSegmentFlowArrayToFill - the inflows (u_a) to update

activateEligibleSplittingRateTrackedNodes

protected void activateEligibleSplittingRateTrackedNodes()

In a path based implementation, tracked nodes overlap with potentially blocking nodes. Since potentially blocking nodes are identified by the base class, there is no need for additional work in this implementation. Empty implementation

Specified by:

activateEligibleSplittingRateTrackedNodes in class StaticLtmNetworkLoading

updateOdPaths

public void updateOdPaths(OdPaths odPaths)

Update the od paths to use in the loading

Parameters:

odPaths - to use