A 3D Finite-element Investigation into Optimal Survey Parameters and Direct Imaging for Marine Controlled-Source Electromagnetic Surveys. (May 2006) Ryan Lau, B.S., University of Waterloo, Canada Chair of Advisory Committee: Dr. Mark E. Everett Relatively little is known about marine controlled-source electromagnetic surveys (MCSEM) used to detect hydrocarbon reservoirs. Typical MCSEM require t...

spectral decomposition is a powerful tool for analysis of seismic data. fourier transform determines the frequency contents of a signal. but for analysis of non-stationary signals, 1-d transform to frequency domain is not sufficient. in early years, transforming of seismic traces into time and frequency domain was done via windowed fourier transform, called a short time fourier transform (stft)...

A 3D simulation of the upper part of the solar convective zone is used to obtain information on the frequency component, χk , of the correlation product of the turbulent velocity field. This component plays an important role in the stochastic excitation of acoustic oscillations. A time analysis of the solar simulation shows that a Gaussian function does not correctly reproduce the ν-dependency ...

• Computational steering: enabling interaction with simulations and to direct the solution of biomedical, chemical, and engineering time-critical problems. • Medical: investigate such complex systems as the human body with real-time, 3D computer images; visualising correlation between therapeutic targets and disease; surgical planning and simulation: virtual endoscopy; computer augmented surger...

This study of the effects of local geological conditions on seismic ground motion uses 1D amplification as a reference point and examines, via simple theoretical and more realistic numerical examples and observations, how 2D and 3D conditions differ from 1D estimations. Because 1D simulations cannot model basin and edge effects, 1D response tends, in general, to exhibit lower peaks and be of sh...

Historically though, 3D marine streamer acquisition has been forced to compromise spatial sampling in the name of efficiency and cost. This compromise translates to noise and degraded resolution when processing the data. A significant component of the seismic “noise” contaminating 3D images actually arises during processing, as an unfortunate and inescapable artifact from poor 3D spatial sampli...

We present a technology of 3D seismic field simulation for high-performance computing systems with GPUs or Intel Xeon Phi coprocessors. This technology covers adaptation of a mathematical modeling method and development of a parallel algorithm. We describe the parallel realization designed for simulation based on using staggeredgrids and 3D domain decomposition method. We study the parallel alg...

The main tectonic features in our study region are indicated in Fig. S1. We use 190 earthquakes for the iterative structure inversion (Fig. S2a). Most of the earthquakes are shallow (< 30 km), occurred from 1996 to 2011 (Fig. S3), and are evenly distributed along the North Atlantic Ridge and the Mediterranean-Himalayan belt. Initial source parameters (e.g., centroid time, location, etc.) are co...

Dual systems of steel moment frame and reinforced concrete shear wall have combined the advantages of steel frames and reinforced concrete shear wall. These walls have increased the lateral stiffness of steel frames and have reduced seismic demands on steel frames thus providing opportunities to use such system. In this research intermediate dual system of steel moment frame was chosen with int...

Bridges are potentially one of the most seismically vulnerable structures in the highway system during earthquake events. It is known that the seismic performance of transportation systems plays a key role in the post-earthquake emergency management. Hence, it is necessary to evaluate both physical and functional aspects of bridge structures. The physical aspects of the seismic performance...