Adaptive sampling quasi-Newton methods for zeroth-order stochastic optimization
Journal Article
·
· Mathematical Programming Computation
- University of Texas at Austin, TX (United States)
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Here, we consider unconstrained stochastic optimization problems with no available gradient information. Such problems arise in settings from derivative-free simulation optimization to reinforcement learning. We propose an adaptive sampling quasi-Newton method where we estimate the gradients using finite differences of stochastic function evaluations within a common random number framework. We develop modified versions of a norm test and an inner product quasi-Newton test to control the sample sizes used in the stochastic approximations and provide global convergence results to the neighborhood of a locally optimal solution. We present numerical experiments on simulation optimization problems to illustrate the performance of the proposed algorithm. When compared with classical zeroth-order stochastic gradient methods, we observe that our strategies of adapting the sample sizes significantly improve performance in terms of the number of stochastic function evaluations required.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 2001234
- Journal Information:
- Mathematical Programming Computation, Journal Name: Mathematical Programming Computation Journal Issue: 2 Vol. 15; ISSN 1867-2949
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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