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Department of Mathematical Sciences

Seminar Archives

On this page you can find information about seminars in this and previous academic years, where available on the database.

Statistics Seminars: "Generation of Simulation Input Scenarios using Bootstrap Methods "

Presented by "Thomas R. Willemain, Department of Decision Sciences and Engineering Systems, Rensselaer Polytechnic Institute, Troy, NY USA ",

17 November 2000 14:00 in CM221

"Simulation modelers are forced to choose between fidelity and variety in their input scenarios. Using an historical trace provides only one realistic scenario. Using the input modeling facilities in commercial simulation software provides any number of unrealistic scenarios. We ease this dilemma by developing a way to use the moving blocks bootstrap to convert a single trace into an unlimited number of realistic input scenarios. We do this by setting the bootstrap block size to make the bootstrap samples mimic independent realizations in terms of the distribution of distance between pairs of inputs. We measure distance using a new statistic computed from zero crossings. We estimate the best block size by scaling up an estimate computed by analyzing subseries of the trace. "

Contact sunil.chhita@durham.ac.uk for more information