Automatic detection of ovarian cancer based on improved DWT transformation

Abstract

The Sivaki Dam site located near Sepidar Road, approximately 50 km southwest of Yasuj City was selected for geophysical investigations. The objective of the study was to detect low velocity zones potentially liable to water infiltration or leakage and to evaluate the dynamic properties of subsurface materials. The study applied a combination of shallow seismic refraction profiling and seismic tomography methods. The P-wave velocity in most parts obtained from seismic tomography investigation is less than 3km/s. This velocity corresponds to the high Lugeon number (> 10), which is the indicator of high permeability of dam foundation. Based on the seismic tomography and Lugeon section, at the right abutment, rock mass quality improves towards deeper parts but because of high Lugeon value need for grouting at deep levels. According to Iranian-2800, seismic building code the upper layer has average shear velocity values that range from 375 m/s to 750 m/s and classified as hard soil and mixtures of sands, gravels and clays. According to the national earthquake hazard reduction program (NEHRP) provisions scheme, the Sivaki dam site is preliminarily classified into two site classes (B and C).