The simultaneous perturbation stochastic approximation (SPSA) algorithm has proven very effective for difficult multivariate optimization problems where it is not possible to obtain direct gradient information. As discussed to date, SPSA is based on a highly efficient gradient approximation requiring only two measurements of the loss function independent of the number of parameters being estimated. This note presents a form of SPSA that requires only one function measurement (for any dimension). Theory is presented that identifies the class of problems for which this one-measurement form will be asymptotically superior to the standard two-measurement form.
A one-measurement form of simultaneous perturbation stochastic approximation
Published 1997 in at - Automatisierungstechnik
ABSTRACT
PUBLICATION RECORD
- Publication year
1997
- Venue
at - Automatisierungstechnik
- Publication date
Unknown publication date
- Fields of study
Mathematics, Computer Science
- Identifiers
- External record
- Source metadata
Semantic Scholar
CITATION MAP
EXTRACTION MAP
CLAIMS
CONCEPTS
- asymptotic superiority
A performance relation in which one algorithm has better limiting behavior than another as iterations grow.
Aliases: asymptotically superior
- class of problems
The set of optimization problems for which the stated theoretical condition applies.
Aliases: problems class
- function measurement
A single evaluation of the loss function at a chosen parameter setting.
Aliases: measurement of the loss function, function evaluation
- one-measurement spsa
A variant of SPSA that estimates updates using a single function evaluation per iteration.
Aliases: one-measurement form of SPSA
- simultaneous perturbation stochastic approximation
A stochastic optimization method that estimates gradients from simultaneous perturbations of the parameters.
Aliases: SPSA
- two-measurement spsa
The standard SPSA variant that estimates updates using two function evaluations per iteration.
Aliases: standard two-measurement form
REFERENCES
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