Examples of IterationWithoutImprovementTermination

jsprit.core.algorithm.termination.IterationWithoutImprovementTermination
Terminates algorithm prematurely based on iterations without any improvement (i.e. new solution acceptance).
Termination will be activated by:
algorithm.setPrematureAlgorithmTermination(this);
@author stefan schroeder

Examples of jsprit.core.algorithm.termination.IterationWithoutImprovementTermination

    }
    
    vrpBuilder.setRoutingCost(matrixBuilder.build());
    VehicleRoutingProblem vrp = vrpBuilder.build();
    VehicleRoutingAlgorithm vra = new GreedySchrimpfFactory().createAlgorithm(vrp);
    vra.setPrematureAlgorithmTermination(new IterationWithoutImprovementTermination(100));
    Collection<VehicleRoutingProblemSolution> solutions = vra.searchSolutions();
    
    SolutionPrinter.print(vrp, Solutions.bestOf(solutions), Print.VERBOSE);
    
    assertEquals(2.*397.,Solutions.bestOf(solutions).getCost(),0.01);

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Examples of jsprit.core.algorithm.termination.IterationWithoutImprovementTermination

      
      VehicleRoutingProblemSolution iniSolution = new InsertionInitialSolutionFactory(bestInsertion, solutionCostCalculator).createSolution(vrp);


      vra.addInitialSolution(iniSolution);
      vra.setNuOfIterations(1000);
      vra.setPrematureAlgorithmTermination(new IterationWithoutImprovementTermination(100));
      
  }

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Examples of jsprit.core.algorithm.termination.IterationWithoutImprovementTermination

    algorithmBuilder.setStateAndConstraintManager(stateManager, constraintManager);
    algorithmBuilder.addCoreConstraints();
    algorithmBuilder.addDefaultCostCalculators();
    
    VehicleRoutingAlgorithm algorithm = algorithmBuilder.build();
    algorithm.setPrematureAlgorithmTermination(new IterationWithoutImprovementTermination(100));


    /*
     * and search a solution
     */
    Collection<VehicleRoutingProblemSolution> solutions = algorithm.searchSolutions();

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Examples of jsprit.core.algorithm.termination.IterationWithoutImprovementTermination

    vra.setMaxIterations(1000);
    
    /*
     * optionally define a premature termination criterion (by default: not criterion is set)
     */
    vra.setPrematureAlgorithmTermination(new IterationWithoutImprovementTermination(100));
    
    return vra;
  }

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