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Your search keyword '"Yakowitz, S. J."' showing total 9 results
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9 results on '"Yakowitz, S. J."'

4. Regression methods for spatial data

Author

Yakowitz, S. J and Szidarovszky, F

Subjects
Earth Resources And Remote Sensing
Abstract

The kriging approach, a parametric regression method used by hydrologists and mining engineers, among others also provides an error estimate the integral of the regression function. The kriging method is explored and some of its statistical characteristics are described. The Watson method and theory are extended so that the kriging features are displayed. Theoretical and computational comparisons of the kriging and Watson approaches are offered.

Published
1982

5. Control system estimation and design for aerospace vehicles

Author

Stefani, R. T, Williams, T. L, and Yakowitz, S. J

Subjects
Structural Mechanics
Abstract

The selection of an estimator which is unbiased when applied to structural parameter estimation is discussed. The mathematical relationships for structural parameter estimation are defined. It is shown that a conventional weighted least squares (CWLS) estimate is biased when applied to structural parameter estimation. Two approaches to bias removal are suggested: (1) change the CWLS estimator or (2) change the objective function. The advantages of each approach are analyzed.

Published
1972

7. Procedure for electron and ion lens optimization.

Author

Szilagyi, M., Yakowitz, S. J., and Duff, M. O.

Subjects
*ELECTRONS, *LENSES, *SEARCH algorithms, *OPTICAL aberrations, *MICROFABRICATION
Abstract

This letter describes a computational technique for optimal control problems arising in the synthesis of electron and ion lenses. The method provides an effective search algorithm for electrostatic and/or magnetic imaging fields with minimum aberrations. An optimized electrostatic field distribution is given as an example of application. [ABSTRACT FROM AUTHOR]

Published
1984
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