نتایج جستجو برای: the gpr instruments

تعداد نتایج: 16058315  

Journal: :I. J. Robotics Res. 2010
Paul Timothy Furgale Tim D. Barfoot Nadeem Ghafoor Kevin Williams Gordon Osinski

While there has been much interest in developing ground-penetrating radar (GPR) technology for rover-based planetary exploration, relatively little work has been done on the data collection process. Starting from the manual method, we fully automate GPR data collection using only sensors typically found on a rover. Further, we produce two novel data products: (1) a three-dimensional, photoreali...

Journal: :Journal of immunology 2000
A M Norment L Y Bogatzki B N Gantner M J Bevan

Chemokines are likely to play an important role in regulating the trafficking of developing T cells within the thymus. By using anti-CD3varepsilon treatment of recombinase-activating gene 2 (Rag2-/-) mice to mimic pre-TCR signaling and drive thymocyte development to the double positive stage, we have identified murine GPR-9-6 as a chemokine receptor whose expression is strongly induced followin...

2006
RADAR BRIDGE

Traditional GPR Surveys. High-speed GPR surveys have been performed for many years to map the condition of aging bridge deck structures. Most often, one or more 1.0 GHz horn antennas are driven along unique survey paths spaced anywhere from 3 to 4ft apart—and 2 to 3 GPR scans are collected along every linear foot of the deck surface that is being sampled. Surface dielectric properties, signal a...

2005
Matt Wright Johan Sundberg

We have used supervised machine learning to apply microtiming to music specified only in terms of exact, quantized, theoretical note times. Specifically, the input consists of a sort of musical score: note data specifying the quantized attack times for a variety of percussion instruments. The output of the regression schemes we tried is simply the microtiming deviation to apply to each note. In...

Journal: :Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 2021

The global demand for natural products grows rapidly, intensifying the request development of high-throughput, fast, non-invasive tools quality control applicable on-site. Moisture content is one most important parameters products. It determines their market suitability, stability and shelf life should preferably be constantly monitored. Miniaturized near-infrared (NIR) spectroscopy a powerful ...

2001
L. van Kempen H. Sahli J. Brooks J. Cornelis

One of the main problems with the interpretation of GPR data is the strong ground reflection, obscuring signals arriving from just underneath the surface. The strength of this reflection can be reduced by deconvolution. This technique is especially useful when GPR is used to detect buried landmines. Parametric and non parametric time variant estimators are used for clutter characterization. Wav...

2017
Alessandro Fedeli Matteo Pastorino Andrea Randazzo

Ground Penetrating Radar (GPR) systems are nowadays standard inspection tools in several application areas, such as subsurface prospecting, civil engineering and cultural heritage monitoring. Usually, the raw output of GPR is provided as a B-scan, which has to be further processed in order to extract the needed information about the inspected scene. In this framework, inverse-scattering-based a...

2013
David Ayala-Cabrera Manuel Herrera Joaquín Izquierdo Silvia J. Ocaña-Levario Rafael Pérez-García

This paper addresses the problem of leakage in water distribution systems through the use of ground penetrating radar (GPR) as a nondestructive method. Laboratory tests are performed to extract features of water leakage from the obtained GPR images. Moreover, a test in a real-world urban system under real conditions is performed. Feature extraction is performed by interpreting GPR images with t...

2012
Caroline Dorn Niklas Linde Tanguy Le Borgne Olivier Bour Maria Klepikova

[1] Investigations of solute transport in fractured rock aquifers often rely on tracer test data acquired at a limited number of observation points. Such data do not, by themselves, allow detailed assessments of the spreading of the injected tracer plume. To better understand the transport behavior in a granitic aquifer, we combine tracer test data with single-hole ground-penetrating radar (GPR...

2009
Andrea FISCHER

In order to develop and evaluate a method for the determination of glacier volume from ice-thickness data, the volume of Schaufelferner, Austria, is calculated (1) by manual interpolation of ground-penetrating radar (GPR) data based on measurements at 36 locations in 1995, (2) by manual interpolation of 144 GPR measurements acquired for a higher-resolution estimate in 2003 and 2006, (3) by mult...

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