Package jline.solvers.fluid.analyzers

Class TbiAnalyzer

java.lang.Object

jline.solvers.fluid.analyzers.ClosingAndStateDepMethodsAnalyzer

jline.solvers.fluid.analyzers.TbiAnalyzer

All Implemented Interfaces:

FluidAnalyzer

public class TbiAnalyzer
extends ClosingAndStateDepMethodsAnalyzer

Trajectory-based iteration (TBI) analyzer for the transient fluid solution.

The station set is partitioned into cells (see tbiPartition(jline.lang.NetworkStruct, jline.solvers.SolverOptions)). On each growing-horizon time segment, the initial value problem of every cell is solved with the state of the other cells frozen at the trajectory computed in the previous sweep (Jacobi waveform relaxation); sweeps repeat until the trajectory sup-norm gap falls below options.config.tbi_tol. Cross-cell inflows are therefore evaluated on frozen trajectories, interior flows on the live cell state, matching the decomposed closing-method ODEs of TBI.

Only the ODE integration loop is overridden; the state initialization and the QN/QNt/UNt/TN/UN postprocessing are inherited from ClosingAndStateDepMethodsAnalyzer, run under the closing method convention.

Reference: Sheldon, Tuncer, Casale, "TBI: Transient Hierarchical Modeling of Large-Scale Vehicle Sharing Systems", IEEE T-ITS.

Field Summary

Fields inherited from class jline.solvers.fluid.analyzers.ClosingAndStateDepMethodsAnalyzer

xvec_it, xvec_t

Constructor Summary

Constructors

Constructor	Description
TbiAnalyzer()

Method Summary

Modifier and Type	Method	Description
void	analyze(NetworkStruct sn, SolverOptions options, SolverResult result)
protected void	solver_fluid_iteration(NetworkStruct sn, Map<Station,Map<JobClass,Matrix>> mu, Map<Station,Map<JobClass,Matrix>> phi, Matrix S, double[] yDefault, Matrix slowrate, SolverOptions options, SolverResult result)
static List<int[]>	tbiPartition(NetworkStruct sn, SolverOptions options)	Partition the station set into cells for trajectory-based iteration.

Methods inherited from class jline.solvers.fluid.analyzers.ClosingAndStateDepMethodsAnalyzer

detectStiffnessUsingOstrowski, getXVecIt

Methods inherited from class java.lang.Object

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

Constructor Details

TbiAnalyzer

public TbiAnalyzer()

Method Details

analyze

public void analyze(NetworkStruct sn,
 SolverOptions options,
 SolverResult result)

Specified by:

analyze in interface FluidAnalyzer

Overrides:

analyze in class ClosingAndStateDepMethodsAnalyzer

solver_fluid_iteration

protected void solver_fluid_iteration(NetworkStruct sn,
 Map<Station,Map<JobClass,Matrix>> mu,
 Map<Station,Map<JobClass,Matrix>> phi,
 Matrix S,
 double[] yDefault,
 Matrix slowrate,
 SolverOptions options,
 SolverResult result)

Overrides:

solver_fluid_iteration in class ClosingAndStateDepMethodsAnalyzer

tbiPartition

public static List<int[]> tbiPartition(NetworkStruct sn,
 SolverOptions options)

Partition the station set into cells for trajectory-based iteration. Honors options.config.tbi_cells, a list of disjoint zero-based station-index vectors covering 0..nstations-1. Otherwise stations are agglomerated greedily on the symmetrized station-level routing weights, targeting options.config.tbi_cellsize stations per cell.

Parameters:

sn - network struct

options - solver options

Returns:

list of cells, each an array of zero-based station indices