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A New Direct Search Optimization Method
Journal of Information and Optimization Sciences, 1988Abstract A new direct search nonlinear optimization algorithm is presented. The new algorithm utilizes a specially developed automatic step adjustment algorithm to be used in conjunction with pattern search method developed by Hooke and Jeeves. Two automatic step adjustment schemes arc described. The new algorithm was tested using standard optimization
Samir S. Raouf, Najat M. Rashid
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Search directions for interior linear-programming methods
Algorithmica, 1991This paper examines several internal search directions for linear programming that were proposed since Karmarkar published his algorithm. The resulting algorithms are classified and compared, to be then imbedded in a common framework using a bidirectional search procedure on the original feasible set.
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1987
In this chapter we shall describe a number of direct search methods for minimization. Such methods do not require the explicit evaluation of any partial derivatives of the function being minimized, but instead rely solely on values of the function found during the iterative process.
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In this chapter we shall describe a number of direct search methods for minimization. Such methods do not require the explicit evaluation of any partial derivatives of the function being minimized, but instead rely solely on values of the function found during the iterative process.
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Golden section search over hyper-rectangle: a direct search method
International Journal of Mathematics in Operational Research, 2016This paper generalises the golden section optimal search method to higher dimensional optimisation problem. The method is applicable to a strict quasi-convex function of N-variables over an N-dimensional hyper rectangle. An algorithm is proposed in N-dimension. The algorithm is illustrated graphically in two dimensions and verified through several test
Suvra Kanti Chakraborty +1 more
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A method for direct audio search with applications to indexing and retrieval
2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100), 2002A technique for searching audio data to find an exact match for a given piece of cue-audio is described. The method uses a cepstral parameterisation of the audio and a covariance-based distance metric to quickly locate direct repeats. Results on data from ABC news broadcasts show that the method can successfully locate matches several hundred times ...
Sue E. Johnson, Philip C. Woodland
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Assessing a search direction within a truncated-newton method
Operations Research Letters, 1990Truncated Newton methods for nonlinear optimization compute a search direction by approximately solving the Newton equations, typically via the conjugate gradient algorithm. The search direction is usually assessed using the norm of the residual. This short paper shows that the norm of the residual can be an arbitrarily poor predictor of a good search ...
Nash, Stephen G., Sofer, Ariela
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Direct Searches: Interferometric Methods
1999After giving a brief introduction to optical and infrared interferometry, its observables and theoretical capabilities, we focus on the specific problem of imaging faint point-like companions close to very bright sources with large interferometric arrays.
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Searching for planets: direct methods
2004We now turn to methods of finding planets beyond the Solar System, particularly habitable worlds. In this chapter we shall concentrate on direct methods, where we attempt to detect the radiation reflected or emitted by the planet. We could then analyse this radiation to learn about the planet and see whether it is habitable and indeed inhabited. Direct
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The directed search method for multi-objective memetic algorithms
Computational Optimization and Applications, 2015zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Oliver Schütze 0001 +5 more
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Patterson search – an alternative to direct methods
Acta Crystallographica Section A Foundations of Crystallography, 1983On the basis of the solution of six unknown structures by a real-space Patterson search the merits and limitations of the method are discussed. It is shown how chemical information can be used to provide a reliable starting point for direct methods when there is no automatic solution.
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