Investigations on Processing of Seismic Wave Forms (IV)

investigations of seismic-wave arrival time biases in the stations of tehran seismic network

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Seismic Data Processing with the Wave Equation

The coordinate frames used by theoreticians to describe wave propagation do not include frames in common use by geophysical prospectors to describe observations. Whereas the theoretician generally considers a single source (or shot) location at a time, the experimentalist deals simultaneously with waves which have been generated separately by many shots. Our task in this section is to put the w...

Psychophysical Investigations of Incomplete Forms and Forms

Incompleteness and background are two important types of variance found in images of objects. It has been proposed that a bidirectional network within the visual cortex allows organisms to cope with this variability. In this thesis, the problems of incompleteness and background are defined in detail and various bidirectional (feedforward and backprojecting) network solutions are proposed and di...

Ambient seismic wave field

The ambient seismic wave field, also known as ambient noise, is excited by oceanic gravity waves primarily. This can be categorized as seismic hum (1-20 mHz), primary microseisms (0.02-0.1 Hz), and secondary microseisms (0.1-1 Hz). Below 20 mHz, pressure fluctuations of ocean infragravity waves reach the abyssal floor. Topographic coupling between seismic waves and ocean infragravity waves at t...

Fundamentals of Seismic Wave Propagation