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Ground Penetrating Radar
This book offers an overview of modern advances in Ground Penetrating Radar (GPR) for the reader hoping to understand comprehensive electromagnetic culture, combining instrumental development of radar, signal processing, imaging, and calibration/correction of measured data. GPR has a multi-disciplinary character that can bring together a diverse and broad community. Of concern are the design and optimization of innovative radars, by virtue of the antennas and associated electronics, imaging algorithms, methodological diversity, calibration procedures, and the development of tools for the interpretation of data in mono-static or multi-static configurations within frequency or transient domains. This book provides illustrations in civil engineering for the diagnosis of transport infrastructures and buildings, archeological surveys for the appreciation of cultural heritage, detection of underground pipes and cavities, estimation of soil water content for agriculture, and mapping of root trees developing underground, and in planetology, the analysis of the internal structure of planets and other celestial bodies through electromagnetic waves.
Chapitre 6 - Évaluation des chaussées flexibles par GPR : 20 ans de R&D en France
Ce chapitre présente 20 ans de R&D en France sur l'évaluation des chaussées flexibles par GPR. Il analyse l'état de l'art des inspections routières, détaille les systèmes GPR et leur acquisition, puis aborde le traitement et l'interprétation des données. De nouvelles approches sont proposées pour améliorer les évaluations, notamment des algorithmes de retard temporel à haute résolution. Le potentiel de l'inversion de forme d'onde complète et du radar à synthèse d'ouverture tomographique est également souligné. Mots-clés : contrôle des chaussées flexibles, diagnostic rapide, algorithmes de retard temporel à haute résolution, radar à synthèse d'ouverture. DOI : 10.51926/ISTE.9157.ch6
Radar à pénétration de sol
Cet ouvrage propose une vue d’ensemble des avancées modernes en radar à pénétration de sol (GPR), technologie de nature pluridisciplinaire rassemblant une communauté aussi vaste que diverse. Il traite de la conception et l’optimisation de radars innovants grâce aux antennes et à l’électronique associée, aux algorithmes d’imagerie, à la diversité méthodologique, aux procédures de calibration et au développement d’outils pour l’interprétation des données dans des configurations mono ou multistatiques dans les domaines fréquentiel ou transitoire. Radar à pénétration de sol présente des illustrations en génie civil pour le diagnostic des infrastructures de transport et des bâtiments, des relevés archéologiques pour la valorisation du patrimoine culturel, la détection de tuyaux et de cavités souterrains, l’estimation de la teneur en eau du sol pour l’agriculture, et la cartographie des racines souterraines des arbres. En planétologie, l’analyse de la structure interne des planètes et d’autres corps célestes à l’aide d’ondes électromagnétiques est également menée.
Civil Engineering Applications of Ground Penetrating Radar
This book, based on Transport and Urban Development COST Action TU1208, presents the most advanced applications of ground penetrating radar (GPR) in a civil engineering context, with documentation of instrumentation, methods and results. It explains clearly how GPR can be employed for the surveying of critical transport infrastructure, such as roads, pavements, bridges and tunnels and for the sensing and mapping of underground utilities and voids. Detailed attention is also devoted to use of GPR in the inspection of geological structures and of construction materials and structures, including reinforced concrete, steel reinforcing bars and pre/post-tensioned stressing ducts. Advanced methods for solution of electromagnetic scattering problems and new data processing techniques are also presented. Readers will come to appreciate that GPR is a safe, advanced, non destructive and noninvasive imaging technique that can be effectively used for the inspection of composite structures and the performance of diagnostics relevant to the entire life cycle of civil engineering works.
GPR Remote Sensing in Archaeology
GPR Remote Sensing in Archaeology provides a complete description of the processes needed to take raw GPR data all the way to the construction of subsurface images. The book provides an introduction to the “theory” of GPR by using a simulator that shows how radar profiles across simple model structures look and provides many examples so that the complexity of radar signatures can be understood. It continues with a review of the necessary radargram signal processes needed along with examples. The most comprehensive methodology to construct subsurface images from either coarsely spaced data using interpolation or from dense data from multi-channel equipment and 3D volume generation is presented, advanced imaging solutions such as overlay analysis are introduced, and numerous worldwide site case histories are shown. The authors present their studies in a way that most technical and non-technical users of the equipment will find essentials for implementing in their own subsurface investigations.
7th RILEM International Conference on Cracking in Pavements
In the recent past, new materials, laboratory and in-situ testing methods and construction techniques have been introduced. In addition, modern computational techniques such as the finite element method enable the utilization of sophisticated constitutive models for realistic model-based predictions of the response of pavements. The 7th RILEM International Conference on Cracking of Pavements provided an international forum for the exchange of ideas, information and knowledge amongst experts involved in computational analysis, material production, experimental characterization, design and construction of pavements. All submitted contributions were subjected to an exhaustive refereed peer revi...
Swarm, Evolutionary, and Memetic Computing
This LNCS volume contains the papers presented at the First Swarm, Evolutionary and Memetic Computing Conference (SEMCCO 2010) held during December 16–– 18, 2010 at SRM University, Chennai, in India. SEMCCO 2010 marked the beginning of a prestigious international conference series that aims at bringing together researchers from academia and industry to report and review the latest progress in the cutting-edge research on swarm, evolutionary, and memetic computing, to explore new application areas, to design new bio-inspired algorithms for solving specific hard optimization problems, and finally to create awareness on these domains to a wider audience of practitioners. SEMCCO 2010 receive...
Feature Selection for Knowledge Discovery and Data Mining
As computer power grows and data collection technologies advance, a plethora of data is generated in almost every field where computers are used. The com puter generated data should be analyzed by computers; without the aid of computing technologies, it is certain that huge amounts of data collected will not ever be examined, let alone be used to our advantages. Even with today's advanced computer technologies (e. g. , machine learning and data mining sys tems), discovering knowledge from data can still be fiendishly hard due to the characteristics of the computer generated data. Taking its simplest form, raw data are represented in feature-values. The size of a dataset can be measUJ·ed in ...
Clinical Prediction Models
The second edition of this volume provides insight and practical illustrations on how modern statistical concepts and regression methods can be applied in medical prediction problems, including diagnostic and prognostic outcomes. Many advances have been made in statistical approaches towards outcome prediction, but a sensible strategy is needed for model development, validation, and updating, such that prediction models can better support medical practice. There is an increasing need for personalized evidence-based medicine that uses an individualized approach to medical decision-making. In this Big Data era, there is expanded access to large volumes of routinely collected data and an increa...
Ground Penetrating Radar Surveys to Characterize Pavement Layer Thickness Variations at GPS Sites
A new nondestructive, noncontact method for thickness measurement is available and can be implemented from a survey vehicle moving at highway speed. The technology incorporates horn antenna radar equipment coupled with customized processing software. This report describes an accuracy evaluation of this technology in which results from 10 Strategic Highway Research Program Long Term Pavement Performance (SHRP-LTPP) asphalt pavement sections in 10 states were compared to core data. The results were evaluated and reported in two steps--blind and calibrated.
