Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 177 for “"GPR"”.
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Modulation techniques for GPR system radargram
Ground Penetrating Radar (GPR) system ability to detect embedded object underground is dependent on the ultra-wideband antenna use. Based on this antenna type, the fractional bandwidth used by the GPR system is usually greater or equal to 1. On the other hand, the GPR system using fractional …
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Classifying GPR images using convolutional neural networks
This thesis focused on classifying GPR cylinders' B-scans according to their depth, size, material, and the dielectric constant of the underlying medium using four different architectures of convolutional neural networks. Two CNNs were newly proposed for this study, while the other two were used by …
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GPR data processing for reinforced concrete bridge decks
In this thesis, several aspects of GPR data processing for RC bridge decks are studied. First, autofocusing techniques are proposed to replace the previous expensive and unreliable human visual inspections during the iterative migration process for the estimation of the velocity/dielectric …
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GPR propagation simulation and fat dipole antenna design
Two applications of FEKO are reported. The first application is investigating how antennas propagate. reflect, and the difference in transmit and receive signals in various ground media. Results of the ground penetration simulations done in FEKO (MoM- Method of Moment) is compared to Finite …
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Array-based GPR SAR simulation and image reconstruction
Subsurface object detection has mainly been carried out using conventional ground penetrating radar (OPR) techniques, which use a single receiving antenna from which a number of range profiles (known as ""A Scope"" images) are assembled to form a two-dimensional data field (known as a ""B Scope"" …
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Attributes and their potential to analyze and interpret 3D GPR data
… the past decades, ground-penetrating radar (GPR) has become a well-established, non-destructive subsurface imaging technique. Catalyzed by recent demands for high-resolution, near-surface imaging (e.g., the detection of unexploded ordnances and subsurface utilities, or hydrological …
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A Study of GPR Performance in the Presence of Buried Biomass
GPR performance in the presence of buried biomass (e.g., tree roots) was investigated by using two approaches: experimental measurements and numerical simulations. For the former, two areas known to contain high and low root densities were selected. GPR measurements were performed using the OSU/ESL …
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Predicting properties of storage batteries using GPR-based machine learning methods
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-08-01
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Untersuchung der hydraulischen Bodeneigenschaften durch GPR: Analyse der Kapillarsaumreflexion durch numerische Simulationen
… durch numerische Simulationen einer on-ground GPR-Messung untersucht. Diskutiert wird die Abhängigkeit des reflektierten Wavelets von den hydraulischen Parametern und dem Parametrisierungsmodell, wobei die Modelle von Brooks-Corey, van Genuchten und dessen vereinfachte Form mit m=1-1/n …
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Cognitive GPR for subsurface sensing based on edge computing and deep reinforcement learning
Ground penetrating radars (GPRs) have been extensively used in many industrial applications, such as coal mining, structural health monitoring, subsurface utilities detection and localization, and autonomous driving. Most of the existing GPR systems are human-operated due to the need for experience …
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Development of GPR data analysis algorithms for predicting thin asphalt concrete overlay thickness and density
… can be evaluated using ground-penetrating radar (GPR). The traditional methods for predicting pavement thickness and density relies on the accurate determination of electromagnetic (EM) signal reflection amplitude and time delay. Due to the limitation of GPR antenna bandwidth, the range resolution …
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An Auto-Picking Algorithm For The Detection of Clay Seams In Potash Mines Using GPR Data
… is implemented on Ground Penetrating Radar (GPR) data. Three main processes are required: clustering, ratio analysis and derivative (CRD). These processes translate the knowledge of a trained geophysicist in determining the position of a clay seam using GPR data into an algorithm. The …
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Relative Expression of Germination Genes SleB, GerAC, and Gpr in Heat Treated Bacillus licheniformis and Bacillus subtilis
… and use of primers specific for GerAC, <em>gpr</em>, and <em>SleB</em> genes to evaluate their relative expression and potential for indicators of lag phase in germination. Gene expression studies with qPCR were carried out during germination in <em>Bacillus subtilis </em>and <em>Bacillus …
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3D GROUND-PENETRATING RADAR (GPR) INVESTIGATIONS: BURIED CULVERTS, HISTORICAL GRAVES, A SANDSTONE RESERVOIR ANALOG, AND AN IMPACT CRATER
Ground-penetrating radar (GPR) is used to characterize a variety of subsurface targets such as buried culverts, historical graves, reservoir analogs, and impact craters. In the first case of “buried culverts” I evaluated the GPR performance across five antenna frequencies to determine which would …
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Development of analysis approach utilizing extended common mid-point method to estimate asphalt pavement thickness with 3-D GPR
Embargo set by: Seth Robbins for item 79903 Lift date: 2017-07-22T22:34:16Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system
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Advancing Soil Moisture Mapping with Multi-Modal Drone Sensing and AI: Integrating GPR, Hyperspectral, and Thermal Imaging for Precision Agriculture
… RGB-thermal, and Ground Penetrating Radar (GPR), to improve depth-specific soil moisture estimation in cornfields. By combining surface, canopy, and subsurface information, this research aimed to capture a more complete picture of soil moisture dynamics throughout the growing season. In the …
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Development of Data Analysis Algorithms for Interpretation of Ground Penetrating Radar Data
… techniques, such as Ground Penetrating Radar (GPR). The use of GPR as a nondestructive pavement assessment tool is limited mainly due to the difficulty of GPR data interpretation, which requires experienced operators. Therefore, GPR results are usually subjective and inaccurate. Moreover, GPR …
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