Summary
Stochastic approximation methods, e.g. stochastic gradient procedures, can be accelerated considerably by using deterministic (feasible) descent directions or more exact gradient estimations at certain iteration points. A further improvement of the convergence behavior is attained by an adaptive selection of the step sizes. Given a certain optimality criterion, a recursive procedure for the computation of optimal step sizes is derived. Several properties of the optimal step sizes are shown, and the convergence rate of the resulting optimal semi-stochastic approximation algorithm is calculated. Furthermore, the initial behavior of the optimal procedure is examined.
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© 1987 Springer-Verlag Berlin Heidelberg
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Marti, K. (1987). Optimally Controlled Semi-Stochastic Approximation Procedures. In: Opitz, O., Rauhut, B. (eds) Ökonomie und Mathematik. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-72672-9_21
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DOI: https://doi.org/10.1007/978-3-642-72672-9_21
Publisher Name: Springer, Berlin, Heidelberg
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