نتایج جستجو برای: d gpr data or sections

تعداد نتایج: 5477246  

2015
Kien Dinh Nenad Gucunski Jinyoung Kim Trung H. Duong Hung M. La

Reflection amplitude at top rebar layer has been used as a main criterion for evaluating attenuation of ground-penetrating radar (GPR) data from concrete bridge decks. However, a recent study has pointed out the limitation of this practice. Motivated by that same research, the current paper presents a robust method for performing GPR attenuation analysis. Also based on correlation between A-sca...

2014
Subba Rao

the subsoil and groundwater were suspected to be polluted by leakage from underground tanks around the oil storage facility in Dhanbad, Jharkhand, India. to delineate the seepage zone, integrated geophysical methods comprising Ground Penetrating Radar (GPR) and 2D electrical Resistivity Imaging (eRI) methods were employed over the suspected zone and in the close vicinity. the studies were condu...

2017
Ikechukwu K. Ukaegbu Kelum A. A. Gamage

Radioactive sources exist in environments or contexts that influence how they are detected and localised. For instance, the context of a moving source is different from a stationary source because of the effects of motion. The need to incorporate this contextual information in the radiation detection and localisation process has necessitated the integration of radiological and contextual sensor...

Journal: :Remote Sensing 2018
Vinicius Rafael Neris dos Santos Emerson Rodrigo Almeida Jorge L. Porsani Fernando Lisboa Teixeira Francesco Soldovieri

This paper provides a comparative study between microwave tomography and synthetic time-reversal imaging techniques as applied to ground penetrating radar (GPR) surveys. The comparison is carried out by processing experimental data collected at a controlled test site, with different types of buried targets at given subsurface depths and representative soil conditions. It is shown that the two t...

2018
Xiang Liu Mohammed Serhir Marc Lambert Lionel Pichon X. LIU M. SERHIR L. PICHON

In this paper, a comparison of two ground penetrating radar (GPR) systems is presented, the classical bi-static one and the Multiple Input Multiple Output (MIMO) system both using N Vivaldi antennas. For both configurations a Linear Sampling Metthod (LSM) imaging algorithm and Kirchhoff migration technique are used for target detection and localization. The performance of both systems are compa...

Journal: :Signal Processing 2000
Paul D. Gader Bruce N. Nelson Hichem Frigui Gary Vaillette James M. Keller

An automatic landmine detection algorithm using Ground Penetrating Radar is described. The algorithm combines outputs of multiple detection and feature extraction algorithms to generate a single confidence that a landmine is present at a location. The combination is performed using a fuzzy inference system. Results are provided for real data obtained in real-time with the Geo-Centers Vehicle Mo...

2004
M. Nishimoto K. Shimo

A method for detecting shallowly buried landmines using sequential GPR data is presented. After removing dominant coherent component of ground surface reflection from GPR data, three kinds of target features related to wave correlation, energy ratio, and signal arrival times are extracted. Since the detection problem treated here is reduced to a binary hypothesis test, an approach based on a li...

2016
Spencer Gibb Hung Manh La

Automated rebar detection in images from groundpenetrating radar (GPR) is a challenging problem and difficult to perform in real-time as a result of relatively low contrast images and the size of the images. This paper presents a rebar localization algorithm, which can accurately locate the pixel locations of rebar within a GPR scan image. The proposed algorithm uses image classification and st...

Journal: :Acta clinica Croatica 2017
Igor Đorić Miloš Žarković Zoran Radojičić Nikola Repac Aleksandar Janićijević Krešimir Rotim Goran Tasić Lukas Rasulić

The use of multidetector computed tomography (MDCT) is an integral part of contemporary diagnostics of Graves‘ orbitopathy. The aim of this study was to assess proptosis measurement by MDCT and to compare it to the current standard, Hertel exophthalmometry. A cross-sectional study was conducted at the Clinical Centre of Serbia and included 91 patients (19 male and 72 female) with verified Grave...

Journal: :Remote Sensing 2023

Pavement condition largely determines its long-term behavior and is of paramount importance for rehabilitation maintenance management. The use non-destructive testing (NDT) systems to assess pavement has gained much popularity. Often, well-known NDT are combined take full advantage the capabilities each system. Combining independent optimize assessment process a scientific challenge. With this ...

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