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Machine Learning, Low-Rank Approximations and Reduced Order Modeling in Computational Mechanics

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ISBN: 9783039214099 / 9783039214105 Year: Pages: 254 DOI: 10.3390/books978-3-03921-410-5 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-12-09 11:49:15
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Abstract

The use of machine learning in mechanics is booming. Algorithms inspired by developments in the field of artificial intelligence today cover increasingly varied fields of application. This book illustrates recent results on coupling machine learning with computational mechanics, particularly for the construction of surrogate models or reduced order models. The articles contained in this compilation were presented at the EUROMECH Colloquium 597, « Reduced Order Modeling in Mechanics of Materials », held in Bad Herrenalb, Germany, from August 28th to August 31th 2018. In this book, Artificial Neural Networks are coupled to physics-based models. The tensor format of simulation data is exploited in surrogate models or for data pruning. Various reduced order models are proposed via machine learning strategies applied to simulation data. Since reduced order models have specific approximation errors, error estimators are also proposed in this book. The proposed numerical examples are very close to engineering problems. The reader would find this book to be a useful reference in identifying progress in machine learning and reduced order modeling for computational mechanics.

Keywords

parameter-dependent model --- surrogate modeling --- tensor-train decomposition --- gappy POD --- heterogeneous data --- elasto-viscoplasticity --- archive --- model reduction --- 3D reconstruction --- inverse problem plasticity --- data science --- model order reduction --- POD --- DEIM --- gappy POD --- GNAT --- ECSW --- empirical cubature --- hyper-reduction --- reduced integration domain --- computational homogenisation --- model order reduction (MOR) --- low-rank approximation --- proper generalised decomposition (PGD) --- PGD compression --- randomised SVD --- nonlinear material behaviour --- machine learning --- artificial neural networks --- computational homogenization --- nonlinear reduced order model --- elastoviscoplastic behavior --- nonlinear structural mechanics --- proper orthogonal decomposition --- empirical cubature method --- error indicator --- symplectic model order reduction --- proper symplectic decomposition (PSD) --- structure preservation of symplecticity --- Hamiltonian system --- reduced order modeling (ROM) --- proper orthogonal decomposition (POD) --- enhanced POD --- a priori enrichment --- modal analysis --- stabilization --- dynamic extrapolation --- computational homogenization --- large strain --- finite deformation --- geometric nonlinearity --- reduced basis --- reduced-order model --- sampling --- Hencky strain --- microstructure property linkage --- unsupervised machine learning --- supervised machine learning --- neural network --- snapshot proper orthogonal decomposition

Chemical Biology of Sterols, Triterpenoids and Other Natural Products: A Themed Issue in Honor of Professor W. David Nes on the Occasion of His 65th Birthday

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ISBN: 9783038974161 / 9783038974178 Year: Pages: 256 DOI: 10.3390/books978-3-03897-417-8 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology --- Biochemistry
Added to DOAB on : 2019-06-26 08:44:06
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Sterols and other isoprenoids are of great interest for their molecular structure and function in cell architecture and evolution, as well as for their importance in medicine and agriculture. Molecules’ 2019 Festschrift Special Issue in honor of the 65th birthday of Prof. W. David Nes, an internationally recognized chemical biologist and recipient of the George Schroepher medal for sterol research, focuses on recent developments in the chemistry, biosynthesis, and function of these polycyclic natural products. This volume of Molecules contains 16 leading-edge review articles and original research contributions from an international cast of scientists. This volume is grouped into three sections: (i) isoprenoid metabolome and diversity, (ii) clinical evaluation of sterol and triterpene structures and biosynthesis, and (iii) methods and synthesis of steroids and other compounds. The volume will be a valuable reference tool for those who study medicinal chemistry, protein chemistry, and biochemistry of isoprenoid lipids.

Keywords

Zingiber officinale --- gingerols --- cytotoxic activity --- oleanolic acid --- high-fat high-carbohydrate diet --- pre-diabetes --- glucose homeostasis --- insulin resistance --- atherosclerosis --- ROS --- HUVECs --- LOX-1 --- alkaloid --- granatane --- N-methylcadaverine --- N-methylpiperidine. reductive deamination --- Mucorales --- Rhizopus arrhizus --- sterol pattern --- antifungal effectivity --- gas chromatography-mass spectrometry (GC-MS) --- posaconazole --- sterol biosynthesis --- sterol 14?-demethylase --- sterol C24-methyltransferase --- mechanism-based inactivators --- antifungals --- azoles --- antiparasitic drugs --- human African trypanosomiasis --- Chagas disease --- synthesis --- squalene cyclase --- cycloartenol synthase --- triterpene --- fern --- Polystichum --- terpene --- isoprenoid --- divalent metal co-factor ligation --- antioxidant --- cholesterol --- degeneration --- oxysterol --- retina --- Smith-Lemli-Opitz syndrome --- algal sterols --- ergosterol biosynthesis --- infectious disease --- lipidomics --- oxyphytosterol --- pharmacognosy --- phytosterol --- sterolomics --- lupeol --- keratinocytes --- fibroblasts --- wound healing --- cell migration --- UV-radiation --- ZnO --- toxicity --- sterol content --- cholesterol --- leishmania --- solanaceae --- withanolides --- aurelianolides --- phytosterols --- mesocarp --- oilseed --- maturity --- pod-blast --- ?-tocopherol --- oil bodies --- campesterol --- stigmasterol --- ?-sitosterol --- sterol --- C4-demethylation complex (C4DMC) --- 4-methylsterol --- hormone --- steroid --- development --- genetic disease --- bile alcohol --- cholestanoic acid --- oxysterol --- sterolomics --- enzyme-assisted derivatization --- electrospray ionization-mass spectrometry --- Girard reagent --- n/a

Selected Problems in Fluid Flow and Heat Transfer

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ISBN: 9783039214273 / 9783039214280 Year: Pages: 460 DOI: 10.3390/books978-3-03921-428-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-12-09 11:49:15
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Fluid flow and heat transfer processes play an important role in many areas of science and engineering, from the planetary scale (e.g., influencing weather and climate) to the microscopic scales of enhancing heat transfer by the use of nanofluids; understood in the broadest possible sense, they also underpin the performance of many energy systems. This topical Special Issue of Energies is dedicated to the recent advances in this very broad field. This book will be of interest to readers not only in the fields of mechanical, aerospace, chemical, process and petroleum, energy, earth, civil ,and flow instrumentation engineering but, equally, biological and medical sciences, as well as physics and mathematics; that is, anywhere that “fluid flow and heat transfer” phenomena may play an important role or be a subject of worthy research pursuits.

Keywords

performance characteristics --- Positive Temperature Coefficient (PTC) elements --- heat transfer --- thermal performance --- Computational Fluid Dynamics (CFD) simulation --- air heater --- impingement heat transfer enhancement --- orthogonal jet --- turbulence --- flat plate --- Colebrook equation --- Colebrook-White --- flow friction --- iterative procedure --- logarithms --- Padé polynomials --- hydraulic resistances --- turbulent flow --- pipes --- computational burden --- thermodynamic --- numerical simulation --- thermal effect --- axial piston pumps --- microbubble pump --- bubble generation --- pump efficiency --- bubble size --- concentration --- particle counter --- flow-induced motion --- sharp sections --- T-section prism --- load resistances --- section aspect ratios --- energy conversion --- thermosyphon --- phase change --- two-phase flow --- visualization --- superheated steam --- triaxial stress --- thermogravimetry --- X-ray microtomography --- thermal cracking --- microbubbles --- fluidics --- flow oscillation --- oscillators --- energetics --- pressure loss --- pressure drop --- friction factor --- multiphase flow --- flow rate --- flow regime --- POD --- entropy generation --- boundary layer --- laminar separation bubble --- two-phase flow --- pump performance --- computational fluid dynamics --- centrifugal pump --- flow behavior --- magnetic field --- ferrofluid --- porous cavity --- heat transfer --- mass transfer --- numerical modeling --- numerical modeling --- surrogate model --- correlation --- fin-tube --- spiral fin-tube --- CFD --- ( A g ? F e 3 O 4 / H 2 O ) hybrid nanofluid --- nonlinear thermal radiation --- heat transfer --- chemical reaction --- mass transfer --- method of moment --- numerical results --- transient analysis --- pumps --- moment of inertia --- water hammer --- pipe flow --- wind turbine --- downwind --- tower shadow --- load --- tower --- BEM --- actuator disc --- CANDU-6 --- PHWR --- moderator --- turbulence --- OpenFOAM --- printed circuit heat exchanger --- supercritical LNG --- zigzag type --- heat transfer performance --- gas turbine engine --- particle deposition --- capture efficiency --- multiphase flow --- tip leakage flow --- detached-eddy simulation --- vortex breakdown --- transonic compressor --- POD --- tip leakage flow --- decomposition region --- decomposition dimensionalities --- vortex identification --- SPIV --- fire-spreading characteristics --- real vehicle experiments --- toxic gases --- temperature distributions --- unsteady heat release rate --- thermal energy recovery --- flue gas --- dew point temperature --- condensation --- Aspen® --- thermoacoustic electricity generator --- multi-stage --- traveling-wave heat engine --- push-pull --- inertance-compliance --- acoustic streaming --- n/a

Ten Years of TerraSAR-X—Scientific Results

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ISBN: 9783038977247 9783038977254 Year: Pages: 422 DOI: 10.3390/books978-3-03897-725-4 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General)
Added to DOAB on : 2019-04-25 16:37:17
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Abstract

This Special Issue is a collection of papers addressing the scientific use of data acquired in the course of the TerraSAR-X mission 10 years after launch. The articles deal with the mission itself, the accuracy of the products, with differential interferometry, and with applications in the domains cryosphere, oceans, wetlands, and urban areas.

Keywords

synthetic aperture radar --- TerraSAR-X --- geolocation --- absolute localization accuracy --- stereo sar --- imaging geodesy --- TerraSAR-X --- internal calibration --- geometric and radiometric calibration --- antenna model verification --- antenna pointing determination --- radiometric accuracy --- calibration targets --- long term performance monitoring --- TerraSAR-X --- TanDEM-X --- LEO --- POD --- SLR --- SAR --- Satellite Laser Ranging --- radar ranging --- satellite orbit --- validation --- InSAR coherence --- NDVI --- damage assessment --- density map --- tsunami --- earthquake --- GIS --- TSX Staring spotlight --- high resolution InSAR --- small-scale movements --- atmospheric phase --- layover --- DSM blending --- SAR --- internal waves --- Andaman Sea --- radar --- satellite --- remote sensing --- SAR --- TerraSAR-X --- operations --- ground segment --- orbit --- mission --- global --- urban footprint --- processing --- validation --- community survey --- sustainability --- synthetic aperture radar --- X-band --- marine --- estuarine --- lacustrine --- riverine --- palustrine --- time-series --- SAR applications --- vegetation --- remote sensing data --- DInSAR --- landslide monitoring --- PSI --- super high-spatial resolution TerraSAR-X images --- pixel selection --- measurement pixels’ density --- synthetic aperture radar --- PolSAR --- TerraSAR-X --- surface water monitoring --- flooded vegetation --- classification --- segmentation --- InSAR --- landslide --- phase unwrapping --- phase demodulation --- TerraSAR-X --- RADARSAT-2 --- ALOS-1 --- ERS --- synthetic aperture radar --- TerraSAR-X --- habitat mapping --- monitoring --- remote sensing --- Wadden Sea --- mussel beds --- intertidal bedforms --- tidal gullies --- remote sensing --- film slicks on the sea surface --- dual co-polarized microwave radar --- surface wind waves --- wave breaking --- Snow Cover Extent (SCE) --- TerraSAR-X --- Landsat --- wet snow --- small Arctic catchments --- satellite time series --- TerraSAR-X --- synthetic aperture radar (SAR), radar mission --- remote sensing --- land subsidence --- TerraSAR-X --- SAR interferometry --- coastal environments --- Venice lagoon --- multi-baseline --- multi-pass --- PS --- DS --- geodetic --- TomoSAR --- D-TomoSAR --- PSI --- robust estimation --- covariance matrix --- InSAR --- SAR --- review --- SAR --- SAR interferometry --- atmospheric propagation delay --- persistent scatterer interferometry --- numerical weather prediction --- stratified atmospheric delay --- zenith path delay --- slant path delay --- interferometry --- surface movement monitoring --- ground control points --- radargrammetry --- automated target recognition --- convolutional neural networks (CNN), deep CNN --- support vector machine --- SVM --- synthetic aperture radar --- TerraSAR-X --- SAR interferometry --- land subsidence --- precise orbit determination --- geometric and radiometric calibration --- PSI

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