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Robust solver of a system of nonlinear equations
Růžek, Bohuslav ; Kolář, Petr ; Kvasnička, M.
ANNIT (Artificial Neural Network Inversion Tool) is solver of a set of non- linear equations. It is implemented in MATLAB and Scilab. ANNIT is based on numerical approximation of mapping the right hand sides residuals of the original set of equations to searched parameters. A population of individuals is used for building such approximation. The shape, location and size of this population is adaptively changed during the inversion depending on the convergence of the solved problem. ANNIT has been thoroughly tested by using a set of standard problems and also by using selected geophysical problems (localization of the earthquake hypocenter, magnetotelluric inversion, inversion of group velocities of surface waves etc.).
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OP – an interactive viewer of seismic signals
Kolář, Petr
We introduce a new interactive viewer of digital seismic signals. The viewer is designated for detailed analysis of records of selected seismic events; numerous numerical tools as well as interactive user friendly graphical controls are available.
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Several utilities for comfortable control of interactive graphical interface
Kolář, Petr
Standard MATLAB libraries do not include some tools for interactive figure processing, even if such functions are common in other graphical programs. Therefore we developed following graphical utilities: i, precise interactive selection of a figure area, ii repetition of a press-button function, iii movement of zoomed figure by slides and iv interactive graphical editor of cursor and button icons.
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