نتایج جستجو برای: d gpr modeled sections however

تعداد نتایج: 2240021  

Journal: :Signal Processing 2017
Emanuele Forte Michele Pipan

GPR and reflection seismics share common physical and methodological bases but are sensitive to different subsurface physical properties. The peculiarities of the electromagnetic case impact data acquisition, processing and interpretation. We review multi-offset techniques in GPR applications focusing on similarities and differences through examples taken from different subsurface and target co...

2014
Yu Zhang Anbu Selvam Venkatachalam Dryver Huston Tian Xia

This paper focuses on new signal processing algorithms customized for an air coupled Ultra-Wideband (UWB) Ground Penetrating Radar (GPR) system targeting highway pavements and bridge deck inspections. The GPR hardware consists of a high-voltage pulse generator, a high speed 8 GSps real time data acquisition unit, and a customized field-programmable gate array (FPGA) control element. In comparis...

2014
KELSEY M. LOWE LYNLEY A. WALLIS COLIN PARDOE BEN MARWICK CHRIS CLARKSON TIINA MANNE MIKE A. SMITH RICHARD FULLAGAR

A GPR survey was carried out in advance of archaeological excavations at Madjedbebe (formerly known as Malakunanja II), a sandstone rock shelter in western Arnhem Land (Australia) containing numerous Aboriginal burials. GPR revealed subsurface patterning of rocks in the shelter deposits and archaeological excavation demonstrated that these were related to burials. Post-excavation, GIS and stati...

2015
Xinyan Yan Bo Xie Le Song Byron Boots

Gaussian process regression (GPR) is a popular tool for nonlinear function approximation. Unfortunately, GPR can be difficult to use in practice due to the O(n) memory and O(n) processing requirements for n training data points. We propose a novel approach to scaling up GPR to handle large datasets using the recent concept of doubly stochastic functional gradients. Our approach relies on the fa...

2010
Huanhuan Chen Anthony G Cohn

This paper proposes a probabilistic conic mixture model based on a classification expectation maximization algorithm and applies this algorithm to Ground Penetrating Radar (GPR) spatial data interpretation. Previous work tackling this problem using Hough transform or neural networks for identifying GPR hyperbolae are unsuitable for on-site applications owing to their computational demands and t...

Journal: : 2022

This literature reviews the work of researchers on ground-penetrating radar (GPR). research consists five sections starting from first section that focuses general application and advantage GPR system in comparison to other types underground detection systems.
 The main function is detect object buried at end full scan, output image represents total signals detected by receiver device. One...

ژورنال: ژئوفیزیک ایران 1392
ابوالقاسم کامکار روحانی, مهدی محمدی‌ویژه

آشکارسازی تأسیسات زیرسطحی و آگاهی از مشخصات و محل دفن دقیق آنها یکی از چالش‌هایی است که مهندسان تأسیسات همواره با آن مواجه‌اند. گسترش شهرها و به‌‌واسطه آن نیاز به توسعه شبکه‌های تأسیساتی و رفاهی جدید و همچنین نیاز به تعمیر و نگهداری از شبکه‌های قدیمی‌تر، تعیین محل دقیق آنها را بسیار پراهمیت ساخته است. در این راستا روش‌های غیر مخرب به‌‌منظور صرفه‌‌جویی در وقت و هزینه و همچنین کاهش اختلا‌ل‌های نا...

Journal: :Contributions to Geophysics and Geodesy 2023

In the development of geophysical methods for unexploded ordnance detection, a very important role is played by UXO test sites, where known and other explosive/nonexplosive items are buried in ground at defined positions. At such various detection can be compared, developed tested. Based on cooperation between Department Applied Geophysics (Comenius University), Institute Forensic Science (Slov...

ژورنال: مواد پرانرژی 2020

In general, due to the role of traffic tunnels on intercity and city transport and its high cost and operation, structural safety and defense considerations in these structures are very important. The structural lining of the tunnel can cause a lot of damage under the internal explosions resulting from malicious operations. Therefore, it is important to investigate the impact and damage caused ...

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