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[2008-08-01] |
[2008-08-01] Anisotropic Wavefield Extrapolator Click on the thumbnail to view the result of IR migration for a strongly anisotropic medium using a new explicit narrow-aperture extrapolation operator. I propose a mathematical technique for building mixed explicit/implicit wavefield extrapolators for strongly anisotropic media that can successfully handle both lateral variation of the anisotropic parameters and steep dips using computationally efficient finite difference equations.
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[2008-04-25] |
[2008-04-25] Optimised Absorbing Boundary Conditions Click on the thumbnail in the left pane to see a snapshot of time-domain wave modelling that demonstrates my latest optimised ABC (the right boundary) in comparison with Reynolds-Higdon ABC (top).
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[2008-02-21] |
[2008-02-21] Locally Optimal Velocity Estimation I have extended the concept of localised optimisation previously used in the localised image-difference wave-equation tomography (see the Technology section) to apply to the wave-equation migration velocity analysis. Click on the thumbnail to get a larger picture of the Marmousi velocity model reconstructed from pres-stack synthetic data using the proposed technique.
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[2008-01-14] |
[2008-01-14] Computationally Efficient Absorbing Boundary Conditions Click on the thumbnail in the left pane to see animated snapshots of sample output from my time-domain wave equation modelling programme that implements my latest absorbing boundary conditions technique. The proposed technique allows for a computationally efficient numeric solution of Cauchy problems, and in terms of computational complexity it rivals existing techniques such as Perfectly Matched Layers. The method can have a broad range of applications to modelling wave phenomena in Physics and Engineering.
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[2007-12-22] |
[2007-12-22] Controller Project Milestone The Industrial Controller Project has reached an important milestone: a customised bare-bones SSH server has been implemented that supports eToken-based identification to run under Debian for ARM. This allows a wide variety of practical applications of the device in secure data exchange.
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