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Autonomous Control of Unmanned Aerial Vehicles

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ISBN: 9783039210305 9783039210312 Year: Pages: 270 DOI: 10.3390/books978-3-03921-031-2 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-06-26 08:44:06
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Unmanned aerial vehicles (UAVs) are being increasingly used in different applications in both military and civilian domains. These applications include surveillance, reconnaissance, remote sensing, target acquisition, border patrol, infrastructure monitoring, aerial imaging, industrial inspection, and emergency medical aid. Vehicles that can be considered autonomous must be able to make decisions and react to events without direct intervention by humans. Although some UAVs are able to perform increasingly complex autonomous manoeuvres, most UAVs are not fully autonomous; instead, they are mostly operated remotely by humans. To make UAVs fully autonomous, many technological and algorithmic developments are still required. For instance, UAVs will need to improve their sensing of obstacles and subsequent avoidance. This becomes particularly important as autonomous UAVs start to operate in civilian airspaces that are occupied by other aircraft. The aim of this volume is to bring together the work of leading researchers and practitioners in the field of unmanned aerial vehicles with a common interest in their autonomy. The contributions that are part of this volume present key challenges associated with the autonomous control of unmanned aerial vehicles, and propose solution methodologies to address such challenges, analyse the proposed methodologies, and evaluate their performance.

Structural Control of Mineral Deposits. Theory and Reality

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ISBN: 9783038977841 9783038977858 Year: Pages: 256 DOI: 10.3390/books978-3-03897-785-8 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General)
Added to DOAB on : 2019-06-26 10:09:00
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""Structural Control"" remains a crucial point that frequently lacks in any scientific and/or economic analysis of ore deposits, whatever their type and class. The case of lode deposits is exemplary, although also other deposits, like breccia pipe, stockwerk, massive sulphides, skarn, etc., can, surprisingly, be concerned. Several concepts like the gold-bearing shear zone have not proven valid during the last few decades in terms of our understanding of gold deposit and have been totally abandoned. Additionally, the relationships between magmatism, regional tectonic context, and mineralization remain uncertain and have been debated in several recent publications. This demonstrates that this issue is still relevant, and its solution may help in the distinction between intrusion-related and orogenic deposits. In this Special Issue, we particularly invite any case study of mineral deposits, in which it has been demonstrated that structural geology may have a significant role in the establishment of the deposit model of formation and/or on exploration and exploitation programs. Examples in which the structural model diverges from those described in the classical literature are particularly welcomed, including studies in which relationships with magmatism can be suspected and/or demonstrated. Indeed, all cases that illustrate concepts that differ from the classic ones and from theoretical models may represent significant contributions to this volume.

Large Grid-Connected Wind Turbines

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ISBN: 9783038977568 Year: Pages: 212 DOI: 10.3390/books978-3-03897-757-5 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Physics (General) --- Science (General)
Added to DOAB on : 2019-04-05 10:34:31
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This book covers the technological progress and developments of a large-scale wind energy conversion system along with its future trends, with each chapter constituting a contribution by a different leader in the wind energy arena. Recent developments in wind energy conversion systems, system optimization, stability augmentation, power smoothing, and many other fascinating topics are included in this book. Chapters are supported through modeling, control, and simulation analysis. This book contains both technical and review articles.

New Mineral Species and Their Crystal Structures

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ISBN: 9783038976882 Year: Pages: 204 DOI: 10.3390/books978-3-03897-689-9 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General)
Added to DOAB on : 2019-04-05 11:07:22
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One last comment concerns the fundamental contributions of Fourier analysis to quantum physics: Quantum mechanics and quantum field theory.

Keywords

ariegilatite --- nabimusaite group --- new mineral --- crystal structure --- intercalated hexagonal antiperovskite --- CO3-group --- Raman --- pyrometamorphic rocks --- Hatrurim Complex --- tiberiobardiite --- chalcophyllite group --- copper --- silicate --- sulfate --- Cretaio --- Tuscany --- Italy --- oyonite --- lillianite homologous series --- sulfosalt --- copper --- antimony --- arsenic --- Oyon district --- Lima department --- Peru --- fiemmeite --- new oxalate mineral --- Val di Fiemme --- Trentino --- Italy --- sharyginite --- new mineral --- crystal structure --- Raman spectroscopy --- Bellerberg volcano --- Germany --- kurchatovite --- clinokurchatovite --- crystal structure --- borate --- polymorphism --- polytypism --- structural complexity --- structural combinatorics --- configurational entropy --- least-action principle --- barioferrite --- crystal structure --- single-crystal investigation --- Raman --- Hatrurim Complex --- Rusinovite --- Raman spectroscopy --- pyrometamorphism --- stacking faults --- Shadil-Khokh volcano --- Bellerberg volcano --- aurihydrargyrumite --- Au6Hg5 phase --- gold --- placer --- self-electrorefining --- Ehime --- Japan --- cerromojonite --- selenium --- copper --- lead --- mercury --- bismuth --- sou?ekite --- bournonite group --- El Dragón --- Bolivia --- nöggerathite-(Ce) --- new mineral --- zirconolite --- laachite --- sanidinite --- crystal structure --- alkaline volcanic rock --- Laacher See --- Eifel --- parafiniukite --- apatite supergroup --- hedyphane group --- manganese --- calcium --- phosphorus --- Szklary pegmatite --- Lower Silesia --- Poland --- thermaerogenite --- cuprospinel --- gahnite --- magnesioferrite --- CuAl2O4 --- CuFe2O4 --- copper oxide --- new mineral --- spinel supergroup --- fumarole sublimate --- Tolbachik volcano --- Kamchatka --- verneite --- new mineral --- crystal structure --- Hekla --- Vesuvius --- Eldfell --- aluminofluoride

Flow and Transport Properties of Unconventional Reservoirs 2018

Authors: --- --- ---
ISBN: 9783039211166 9783039211173 Year: Pages: 364 DOI: 10.3390/books978-3-03921-117-3 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-08-28 11:21:27
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Unconventional reservoirs are usually complex and highly heterogeneous, such as shale, coal, and tight sandstone reservoirs. The strong physical and chemical interactions between fluids and pore surfaces lead to the inapplicability of conventional approaches for characterizing fluid flow in these low-porosity and ultralow-permeability reservoir systems. Therefore, new theories and techniques are urgently needed to characterize petrophysical properties, fluid transport, and their relationships at multiple scales for improving production efficiency from unconventional reservoirs. This book presents fundamental innovations gathered from 21 recent works on novel applications of new techniques and theories in unconventional reservoirs, covering the fields of petrophysical characterization, hydraulic fracturing, fluid transport physics, enhanced oil recovery, and geothermal energy. Clearly, the research covered in this book is helpful to understand and master the latest techniques and theories for unconventional reservoirs, which have important practical significance for the economic and effective development of unconventional oil and gas resources.

Keywords

fracturing fluid --- rheology --- chelating agent --- viscosity --- polymer --- fluid-solid interaction --- velocity profile --- the average flow velocity --- flow resistance --- pore network model --- shale gas --- volume fracturing --- finite volume method --- production simulation --- multi-scale flow --- multi-scale fracture --- shale gas reservoir --- fractured well transient productivity --- succession pseudo-steady state (SPSS) method --- complex fracture network --- multi-scale flow --- analysis of influencing factors --- tight sandstones --- spontaneous imbibition --- remaining oil distributions --- imbibition front --- imbibition recovery --- NMR --- slip length --- large density ratio --- contact angle --- pseudo-potential model --- lattice Boltzmann method --- micro-fracture --- dissolved gas --- experimental evaluation --- reservoir depletion --- recovery factor --- tight oil --- Lucaogou Formation --- tight oil --- pore structure --- prediction by NMR logs --- tight oil reservoir --- SRV-fractured horizontal well --- multiporosity and multiscale --- flow regimes --- productivity contribution degree of multimedium --- equilibrium permeability --- non-equilibrium permeability --- matrix–fracture interaction --- effective stress --- coal deformation --- porous media --- non-linear flow --- conformable derivative --- fractal --- hydraulic fracturing --- tight reservoirs --- fracture diversion --- extended finite element method --- fracture network --- gas adsorption capacity --- shale reservoirs --- influential factors --- integrated methods --- sulfonate gemini surfactant --- thickener --- temperature-resistance --- clean fracturing fluid --- low-salinity water flooding --- clay mineral composition --- enhanced oil recovery --- wetting angle --- pH of formation water --- fractional diffusion --- fractal geometry --- analytical model --- shale gas reservoir --- carbonate reservoir --- petrophysical characterization --- pore types --- pore structure --- permeability --- fractal dimension --- reservoir classifications --- deep circulation groundwater --- groundwater flow --- geothermal water --- faults --- isotopes --- shale permeability --- local effect --- global effect --- matrix-fracture interactions --- nanopore --- pore structure --- shale --- tight sandstone --- mudstone --- nitrogen adsorption --- fractal --- enhanced geothermal system --- well-placement optimization --- fracture continuum method --- 0-1 programming --- unconventional reservoirs --- petrophysical characterization --- fluid transport physics

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english (5)


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2019 (5)