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Stochastic Algorithms for Discrete Parameter Simulation Optimization

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3 Author(s)
Shalabh Bhatnagar ; Department of Computer Science and Automation, Indian Institue of Science, Bangalore, India ; Vivek Kumar Mishra ; Nandyala Hemachandra

We present two efficient discrete parameter simulation optimization (DPSO) algorithms for the long-run average cost objective. One of these algorithms uses the smoothed functional approximation (SFA) procedure, while the other is based on simultaneous perturbation stochastic approximation (SPSA). The use of SFA for DPSO had not been proposed previously in the literature. Further, both algorithms adopt an interesting technique of random projections that we present here for the first time. We give a proof of convergence of our algorithms. Next, we present detailed numerical experiments on a problem of admission control with dependent service times. We consider two different settings involving parameter sets that have moderate and large sizes, respectively. On the first setting, we also show performance comparisons with the well-studied optimal computing budget allocation (OCBA) algorithm and also the equal allocation algorithm.

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IEEE Transactions on Automation Science and Engineering  (Volume:8 ,  Issue: 4 )