Дисертації з теми "High-resolution simulation"
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Eilertsen, Gabriel. "High-resolution simulation and rendering of gaseous phenomena from low-resolution data." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-70269.
Повний текст джерелаRomero, Cindy G. "High Resolution Simulation of Synthetic Aperture Radar Imaging." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/345.
Повний текст джерелаSaunders, II Charles Phillip. "High Resolution Imaging Ground Penetrating Radar Design and Simulation." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/47806.
Повний текст джерелаMaster of Science
Warhola, Paul J. "An analysis of alternative methods to conduct high-resolution activities in a variable-resolution simulation." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA337495.
Повний текст джерелаPiotrowski, Jesse Alex. "Development of a high-resolution two-dimensional urban/rural flood simulation." Thesis, University of Iowa, 2010. https://ir.uiowa.edu/etd/574.
Повний текст джерелаTang, Dong. "Studies of computer aided image interpretaion in high resolution electron microscopy." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240064.
Повний текст джерелаCoville, Michael Paul. "A methodology for validation of high resolution combat models." Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/23305.
Повний текст джерелаSenior officers in the United States Army have a high degree of confidence that National Training Center simulated combat results are representative, under similar circumstances, of actual combat. A validation methodology for high resolution combat models, primarily based on data acquired from the National Training Center, is the focus of this thesis. The validation methodology, where appropriate, translates confidence in National Training Center realism, to confidence in the combat model. Theoretical issues, existing methodologies, and the impact of model purpose are considered in this research. The final product is a validation methodology that makes use of a realistic representation of combat, automatically updates validation criteria to account for changes in weapons and tactics, and is responsive to the purpose for which the model was designed.
http://archive.org/details/methodologyforva00covi
Captain, United States Army
Siu, Christopher E. "Simulating Epidemics and Interventions on High Resolution Social Networks." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2051.
Повний текст джерелаRice, Matthew Jason. "High Resolution Simulation of Laminar and Transitional Flows in a Mixing Vessel." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/27716.
Повний текст джерелаPh. D.
Groom, Michael Robert. "Direct Numerical Simulation of Shock-Induced Turbulent Mixing with High-Resolution Methods." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/23721.
Повний текст джерелаDel, Puppo Norman. "High resolution ship hydrodynamics simulations in opens source environment." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10983.
Повний текст джерелаThe numerical simulation of wake and free-surface flow around ships is a complex topic that involves multiple tasks: the generation of an optimal computational grid and the development of numerical algorithms capable to predict the flow field around a hull. In this work, a numerical framework is developed aimed at high-resolution CFD simulations of turbulent, free-surface flows around ship hulls. The framework consists in the concatenation of “tools” in the open-source finite volume library OpenFOAM®. A novel, flexible mesh-generation algorithm is presented, capable of producing high-quality computational grids for free-surface ship hydrodynamics. The numerical framework is used to solve some benchmark problems, providing results that are in excellent agreement with the experimental measures.
XXVII Ciclo
1981
Hahn, Marco. "Implicit large-eddy simulation of low-speed separated flows using high-resolution methods." Thesis, Cranfield University, 2008. http://hdl.handle.net/1826/2633.
Повний текст джерелаFu, Xiaojing S. M. Massachusetts Institute of Technology. "High-resolution simulation of pattern formation and coarsening dynamics in 3D convective mixing." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/106958.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 45-47).
Geologic C0₂ sequestration is considered a promising tool to reduce anthropogenic C0₂ emissions while allowing continued use of fossil fuels for the current time. The process entails capturing C0₂ at point sources such as coal-fired power plants, and injecting it in its supercritical state into deep saline aquifers for long-term storage. Upon injection, C0₂ partially dissolves in groundwater to form an aqueous solution that is denser than groundwater. The local increase in density triggers a gravitational instability at the boundary layer that further develops into columnar C0₂-rich plumes that sink away. This mechanism, also known as convective mixing, greatly accelerates the dissolution rate of C0₂ into water and provides secure storage of C0₂ underground. Understanding convective mixing in the context of C0₂ sequestration is essential for the design of injection and monitoring strategies that prevent leakage of C0₂ back into the atmosphere. While current studies have elucidated various aspects of this phenomenon in 2D, little is known about this process in 3D. In this thesis we investigate the pattern-formation aspects of convective mixing during geological C0₂ sequestration by means of high-resolution three-dimensional simulation. We find that the C0₂ concentration field self-organizes as a cellular network structure in the diffusive boundary layer right beneath the top boundary. By studying the statistics of the cellular network, we identify various regimes of finger coarsening over time, the existence of a nonequilibrium stationary state, and an universal scaling of 3D convective mixing. We explore the correlation between the observed network pattern and the 3D flow structure predicted by hydrodynamics stability theory.
by Xiaojing Fu.
S.M.
Jimenez, Eduardo Antonio. "Fast history matching of time-lapse seismic and production data for high resolution models." Diss., Texas A&M University, 2008. http://hdl.handle.net/1969.1/85950.
Повний текст джерелаMünnich, Astrid. "Simulation studies for a high resolution time projection chamber at the international linear collider." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=984635068.
Повний текст джерелаShende, Sachin. "Database-driven hydraulic simulation of canal irrigation networks using object-oriented high-resolution methods." Thesis, Loughborough University, 2006. https://dspace.lboro.ac.uk/2134/14208.
Повний текст джерелаGholami, Vida. "Fuzzy rock typing enhancing reservoir simulation and modeling by honoring high resolution geological models /." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10555.
Повний текст джерелаTitle from document title page. Document formatted into pages; contains xiii, 120 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 89-93).
Moore, Matthew Roger. "Development of a high-resolution 1D/2D coupled flood simulation of Charles City, Iowa." Thesis, University of Iowa, 2011. https://ir.uiowa.edu/etd/1032.
Повний текст джерелаDenby, Leif Christopher. "Using high-resolution modelling to improve the parameterisation of convection in a climate model." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/269850.
Повний текст джерелаTarhan, Tanil. "Numerical Simulation Of Laminar Reacting Flows." Phd thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12605307/index.pdf.
Повний текст джерелаDehlinger, Mael. "XAS-XEOL and XRF spectroscopies using near field microscope probes for high-resolution photon collection." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4048/document.
Повний текст джерелаScanning Probe Microscopes allow to obtain sample topography up to atomic resolution. X-ray spectroscopies allow elemental and structural analysis of a sample with accuracy better than 1 Å. The lateral resolution is limited by the primary beam diameter, currently a few µm². We have chosen to couple this two technics. Local sample visible luminescence is collected through a low aperture sharp optical fibre, probe of a shear force microscope. This technique was used to characterize microstructured semiconducting samples to achieve simultaneously the surface topography and luminescence mapping. The results were obtained using either synchrotron radiation or a laboratory microsource equipped with a polycapillary lens. To extend this concept to a wider variety of materials, local XRF collection by an EDX detector equipped with a cylindrical X-ray capillary was tested. A cobalt sample irradiated with the microsource was used for technique evaluation. The signal magnitude dependence with the capillary diameter was measured. Modelling and numerical calculations were developed to estimate the signal magnitude that could be detected using a 1 µm diameter capillary. The optimal system geometry was determined. Scanning Probe Microscopy combined to XRF analysis could thereby lead to simultaneous acquisition of sample topography and chemical mapping. The expected lateral resolution using synchrotron radiation is 100 nm while sub 1 µm resolution is realistic with a laboratory source. This technique would allow to point a peculiar micro- or nano-object on the surface and to perform its chemical analysis
Kokkinakis, Ioannis William. "Investigation of high-resolution methods in large-eddy simulation of subsonic and supersonic wall turbulent flows." Thesis, Cranfield University, 2009. http://hdl.handle.net/1826/3749.
Повний текст джерелаBurns, Kimberly Ann. "Coupled multi-group neutron photon transport for the simulation of high-resolution gamma-ray spectroscopy applications." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29737.
Повний текст джерелаCommittee Chair: Hertel, Nolan; Committee Member: Kulp, William David; Committee Member: Lee, Eva; Committee Member: Pagh, Richard; Committee Member: Petrovic, Bojan; Committee Member: Rahnema, Farzad; Committee Member: Smith, Eric; Committee Member: Wang, Chris. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Anastasiadis, Anastasios. "A Monte Carlo simulation study of collimators for a high-spatial-resolution Gamma Emission Tomography instrument." Thesis, Uppsala universitet, Tillämpad kärnfysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-384170.
Повний текст джерелаDenna uppsats handlar om kollimatordesign för hög rumsupplösning i gammaemissionstomografi (GET) av använt kärnbränsle genom att använda Monte Carlo-simuleringskoder. Att konstruera en kollimator för detta syfte är en process som kräver hänsyn till sammankopplande och ibland konflikterande målsättningar. Målet är att designa en GET-system som på bästa sätt kombinerar följande specifikationer: hög räknehastighet i detektorn, hög peak-to-total ratio, låg detektors dödtid och låg bakgrund från läckage genom skärmingsmaterialet. För att uppnå bästa möjliga resultat mellan dessa punkter användes simuleringskoderna GEANT4 och Serpent 2. Använt kärnbränsle innehåller varierande radionuklider och beroende på deras utbränning och nedkylningstid deras emissioner (absolutintensitet) varierar (t.ex större kollimatorers längd krävs vid högre intensitet från bränslet). Serpent 2 har använts för att beräkna gammaemisionsspektra för lång- och kort-kylda bränslen med låga och höga utbränningar. Med dessa hypotetiska bränslen, har spaltdimensioner och material undersökts. Beträffande spaltlängden och materialval användes GEANT4 genom att tillämpa variansreduktionsteknikerna geometry splitting/Russian roulette. Spaltbredden och spalthöjden hittades med Serpent 2 genom att beräkna transmissionssignal genom spalter av varierande dimensioner. Slutligen, undersöktes hur peak-to-total ratio ändras för olika spaltmått och även när en kavitet introduceras i kollimatorn.
ISHIHARA, T., M. KANEDA, K. YOKOKAWA, K. ITAKURA, and A. UNO. "Small-scale statistics in high-resolution direct numerical simulation of turbulence: Reynolds number dependence of one point." Taylor & Francis, 2007. http://hdl.handle.net/2237/11132.
Повний текст джерелаLumsdon, Parivash. "Development and simulation of signal processing algorithms for high resolution wide band direction finding and multipath cancellation." Thesis, University of Newcastle Upon Tyne, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294375.
Повний текст джерелаAgada, Simeon. "Numerical simulation and optimisation of IOR and EOR processes in high-resolution models for fractured carbonate reservoirs." Thesis, Heriot-Watt University, 2015. http://hdl.handle.net/10399/2893.
Повний текст джерелаHeiple, Shem C. "Using Building Energy Simulation and Geospatial Modeling Techniques in Determine High Resolution Building Sector Energy Consumption Profiles." PDXScholar, 2007. https://pdxscholar.library.pdx.edu/open_access_etds/3399.
Повний текст джерелаBurls, Natalie. "Simulation of high resolution winds over the southern Benguela upwelling system with potential application to harmful algal blooms." Master's thesis, University of Cape Town, 2006. http://hdl.handle.net/11427/6464.
Повний текст джерелаThe Southern Benguela upwelling system is particularly susceptible to Harmful Algal Blooms (HABs), most of which are attributed to dinoflagellate species. Dinoflagellates are favoured by stratified conditions. Consequently, temporal or spatial variations in ocean and atmospheric conditions that favour stratification will encourage HAB development. Temporally, prolonged relaxation of the dominant equatorward wings during late summer typically results in quiscent phases in upwelling which promote stratification and bloom development.
Kuny, Silvia [Verfasser], and S. [Akademischer Betreuer] Hinz. "Detection of Building Damages in High Resolution SAR Images based on SAR Simulation / Silvia Kuny ; Betreuer: S. Hinz." Karlsruhe : KIT-Bibliothek, 2021. http://d-nb.info/123507238X/34.
Повний текст джерелаZanier, Giulia. "High Resolution Model to Predict Oil Spill Dispersion in Harbour and Coastal Areas." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/11124.
Повний текст джерелаMostriamo un modello allo stato dell’arte, che considera i principali processi fisici che governano il greggio in mare nelle prime ore dopo il rilascio, (Zanier, et al., 2014). Le particelle e i tar sono trattati come particelle lagrangiane, ognuna con la propria densità e il proprio diametro; consideriamo le forze principali che agiscono su di esse ossia: galleggiamento, trascinamento e la forza di Coriolis. Il greggio in forma di film sottile è modellato tramite le equazioni proposte da Nihoul (Nihoul 1983/84). Il modello originale di Nihoul considera le forze principali (ossia gravità, stress indotto da vento e correnti marine) che agiscono sulla macchia e governano il suo trasporto e diffusione, sulla superficie del mare, nelle prime 24 ore dopo il rilascio. Il nostro miglioramento al modello consiste nell’introduzione della forza di Coriolis evitando di utilizzare formulazioni empiriche (Zanier, et al., 2015). Infine i principali processi di weathering che agiscono sulla macchia nelle prime 12-24 ore dopo il rilascio (ossia emulsificazione ed evaporazione) sono considerate in accordo con i modelli presenti in letteratura (Mackay, Peterson, et al., 1980 e Mackay, Buist, et al., 1980, rispettivamente). Per preservare un’accuratezza del secondo ordine del metodo numerico, i termini convettivi, nel modello Euleriano, sono discretizzati usando SMART uno schema numerico upwind del terzo ordine (Gaskell and Lau 1988). Il modello è validato con dei casi test standard. Le correnti marine sono risolte con il modello LES-COAST (IEFLUIDS Università di Trieste), un modello numerico ad alta definizione, adatto per simulare flussi in aree costiere e portuali. Il modello LES-COAST risolve la forma filtrata delle equazioni di Navier-Stokes tridimensionali e non-idrostatiche, assumendo che valga l’approssimazione di Boussinesq; e l’equazione di trasporto degli scalari, salinità e temperatura. Il modello usa l’approccio della large eddy simulation per parametrizzare la turbolenza, le variabili sono filtrate con una funzione filtro, rappresentante la grandezza delle celle. I flussi di sottogriglia (SGS), che appaiono dopo l’operazione di filtraggio delle equazioni, sono parametrizzati con un modello di Smagorinsky anisotropo con due eddy viscosity, per adattare il modello a simulare flussi costieri dove le lunghezze scala orizzontali sono molto più grandi di quelle verticali (Roman et al., 2010 ). Le diffusività di sotto griglia della temperatura e salinità, cioè i numeri di Prandtl e Schmidt, sono imposti come $Pr_{sgs}=Sc_{sgs}=0.8$, assumendo che l’analogia di Reynolds sia valida per entrambi gli scalari. La complessità geometrica che caratterizza le aree costiere, è trattata con una combinazione di griglie curvilinee e il metodo dei contorni immersi (IBM) (Roman, Napoli, et al., 2009). L’azione del vento sulla superficie libera del mare è imposta tramite una formula proposta da Wu (Wu, 1982), nella quale lo stress del vento sul mare è calcolato dalla velocità del vento a 10 m sopra il livello del mare. Allo stress aggiungiamo una varianza del 20% per agevolare la generazione di turbolenza e per tener conto che l’azione del vento non è costante nel tempo e nello spazio. Inoltre vicino agli ostacoli, come moli, navi e frangiflutti, lo stress del vento è ridotto linearmente, per considerare la riduzione del vento che si ha nelle zone di ricircolo. Sui contorni aperti le velocità e le quantità scalari sono ottenute innestando il modello LES-COAST con modelli di larga scala (Petronio, et al., 2013) oppure sono impostati secondo dati rilevati. Vicino ai bordi solidi le velocità sono modellate tramite funzioni parete (Roman, Armenio, et al., 2009). Il modello di rilascio di petrolio e il modello idrodinamico sono stati applicati assieme per simulare degli ipotetici scenari di trasporto e diffusione del greggio in mare nel porto di Barcellona (Mar Mediterraneo Nord-Ovest, Spagna, Galea, et al. 2014) e nella baia di Panzano (Mar Adriatico, Nord, Italia).
We present a novel, state of the art model, which accounts for the relevant short-term physical processes governing oil spill at sea, (Zanier, et al., 2014). Particles and tars are modelled as Lagrangian phase having its own density and diameter; taking into account the main forces acting on them, namely: buoyancy, drag and Coriolis forces. Oil transported in form of thin-film is treated by means of an improved Nihoul’s model (Nihoul 1983/84). The latter considers the main forces (gravity, wind and sea currents stresses) governing oil slick spreading and transport in the first hours after spilling, up to 24h for large spill. Our main improvement to the classical model consists in the introduction of Coriolis effect, avoiding using empirical formulations (Zanier, et al., 2015). Finally the relevant short-term (12-24 hours) weathering processes (mainly emulsification and evaporation) are taken into account through established literature models (Mackay, Peterson, et al., 1980 and Mackay, Buist, et al., 1980, respectively). To preserve second-order accuracy of the overall numerical method, convective terms, in the Eulerian model, are discretized using SMART a third order accurate upwind numerical scheme (Gaskell and Lau 1988). We validate the model on standard test cases. The underground hydrodynamics is resolved using LES-COAST (IEFLUIDS University of Trieste), a high definition numerical model suited for coastal or harbour areas. LES-COAST model solves the filtered form of three dimensional, non-hydrostatic Navier-Stokes equations under Boussinesq approximation and the transport equation for salinity and temperature. It makes use of Large Eddy Simulation approach to parametrize turbulence, the variables are filtered by way of a top-hat filter function represented by the size of the cells. The subgrid-scale fluxes (SGS), which appear after filtering operations, are parametrized by a two-eddy viscosity anisotropic Smagorinsky model, to better adapt to coastal flow in which horizontal length scale is larger than vertical one (Roman et al., 2010). The subgrid-scale eddy diffusivities of temperature and salinity, Prandtl and Schmidt numbers, are set $Pr_{sgs}=Sc_{sgs}=0.8$, by assuming that Reynolds analogy holds also for both scalars. Complex geometry that characterizes coastal flow is treated by a combination of curvilinear grid and Immersed Boundary Method (IBM) (Roman, Napoli, et al., 2009). Wind action on the free surface is taken into account by means of the formula proposed by Wu (Wu, 1982), in which the wind stress on the sea surface is computed from the wind velocities at 10 m above the surface. A 20% of variance is added to the stress to ease the generation of turbulence and to take into account of wind stress variations in time and space. Moreover near obstacles such as docks, ships and breakwaters, the wind stress is linearly reduced considering the relevant reduction of stress in recirculation regions. On the open boundaries the velocities and scalars quantities are obtained by nesting LES-COAST within Large Circulation Models (Petronio, et al., 2013) or are imposed from in-situ measurements. Near the wall velocities are modelled using wall functions (Roman, Armenio, et al., 2009). We apply the coupled oil spill model and hydrodynamical one to simulate hypothetical oil spill events in real case scenarios in Barcelona harbour (North-west Mediterranean Sea, Spain, Galea, et al. 2014) and in Panzano bay (North Adriatic Sea, Italy).
XXVII Ciclo
1986
Dehlinger, Maël. "XAS-XEOL and XRF spectroscopies using Near-Field Microscope probes for high-resolution photon collection." Phd thesis, Aix-Marseille Université, 2013. http://tel.archives-ouvertes.fr/tel-00880623.
Повний текст джерелаAngerer, Jay Peter. "Examination of high resolution rainfall products and satellite greenness indices for estimating patch and landscape forage biomass." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2827.
Повний текст джерелаMorozova, Nadezhda S. "Utilizing High Resolution Data to Identify Minimum Vehicle Emissions Cases Considering Platoons and EVP." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/78885.
Повний текст джерелаMaster of Science
Kuny, Silvia [Verfasser], and S. [Akademischer Betreuer] Hinz. "Texture based detection of building damages in high resolution SAR images supported by SAR simulation / Silvia Kuny ; Betreuer: S. Hinz." Karlsruhe : KIT-Bibliothek, 2021. http://d-nb.info/123406362X/34.
Повний текст джерелаRamesh, Sathya. "High Resolution Satellite Images and LiDAR Data for Small-Area Building Extraction and Population Estimation." Thesis, University of North Texas, 2009. https://digital.library.unt.edu/ark:/67531/metadc12188/.
Повний текст джерелаFlorin, Madeleine Jill. "Towards Precision Agriculture for whole farms using a combination of simulation modelling and spatially dense soil and crop information." Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/3169.
Повний текст джерелаFlorin, Madeleine Jill. "Towards Precision Agriculture for whole farms using a combination of simulation modelling and spatially dense soil and crop information." University of Sydney, 2008. http://hdl.handle.net/2123/3169.
Повний текст джерелаPrecision Agriculture (PA) strives towards holistic production and environmental management. A fundamental research challenge is the continuous expansion of ideas about how PA can contribute to sustainable agriculture. Some associated pragmatic research challenges include quantification of spatio-temporal variation of crop yield; crop growth simulation modelling within a PA context and; evaluating long-term financial and environmental outcomes from site-specific crop management (SSCM). In Chapter 1 literature about managing whole farms with a mind towards sustainability was reviewed. Alternative agricultural systems and concepts including systems thinking, agro-ecology, mosaic farming and PA were investigated. With respect to environmental outcomes it was found that PA research is relatively immature. There is scope to thoroughly evaluate PA from a long-term, whole-farm environmental and financial perspective. Comparatively, the emphasis of PA research on managing spatial variability offers promising and innovative ways forward, particularly in terms of designing new farming systems. It was found that using crop growth simulation modelling in a PA context is potentially very useful. Modelling high-resolution spatial and temporal variability with current simulation models poses a number of immediate research issues. This research focused on three whole farms located in Australia that grow predominantly grains without irrigation. These study sites represent three important grain growing regions within Australia. These are northern NSW, north-east Victoria and South Australia. Note-worthy environmental and climatic differences between these regions such as rainfall timing, soil type and topographic features were outlined in Chapter 2. When considering adoption of SSCM, it is essential to understand the impact of temporal variation on the potential value of managing spatial variation. Quantifying spatiotemporal variation of crop yield serves this purpose; however, this is a conceptually and practically challenging undertaking. A small number of previous studies have found that the magnitude of temporal variation far exceeds that of spatial variation. Chapter 3 of this thesis dealt with existing and new approaches quantifying the relationship between spatial and temporal variability in crop yield. It was found that using pseudo cross variography to obtain spatial and temporal variation ‘equivalents’ is a promising approach to quantitatively comparing spatial and temporal variation. The results from this research indicate that more data in the temporal dimension is required to enable thorough analysis using this approach. This is particularly relevant when questioning the suitability of SSCM. Crop growth simulation modelling offers PA a number of benefits such as the ability to simulate a considerable volume of data in the temporal dimension. A dominant challenge recognised within the PA/modelling literature is the mismatch between the spatial resolution of point-based model output (and therefore input) and the spatial resolution of information demanded by PA. This culminates into questions about the conceptual model underpinning the simulation model and the practicality of using point-based models to simulate spatial variability. iii The ability of point-based models to simulate appropriate spatial and temporal variability of crop yield and the importance of soil available water capacity (AWC) for these simulations were investigated in Chapter 4. The results indicated that simulated spatial variation is low compared to some previously reported spatial variability of real yield data for some climate years. It was found that the structure of spatial yield variation was directly related to the structure of the AWC and interactions between AWC and climate. It is apparent that varying AWC spatially is a reasonable starting point for modelling spatial variation of crop yield. A trade-off between capturing adequate spatio-temporal variation of crop yield and the inclusion of realistically obtainable model inputs is identified. A number of practical solutions to model parameterisation for PA purposes are identified in the literature. A popular approach is to minimise the number of simulations required. Another approach that enables modelling at every desired point across a study area involves taking advantage of high-resolution yield information from a number of years to estimate site-specific soil properties with the inverse use of a crop growth simulation model. Inverse meta-modelling was undertaken in Chapter 5 to estimate AWC on 10- metre grids across each of the study farms. This proved to be an efficient approach to obtaining high-resolution AWC information at the spatial extent of whole farms. The AWC estimates proved useful for yield prediction using simple linear regression as opposed to application within a complex crop growth simulation model. The ability of point-based models to simulate spatial variation was re-visited in Chapter 6 with respect to the exclusion of lateral water movement. The addition of a topographic component into the simple point-based yield prediction models substantially improved yield predictions. The value of these additions was interpreted using coefficients of determination and comparing variograms for each of the yield prediction components. A result consistent with the preceding chapter is the importance of further validating the yield prediction models with further yield data when it becomes available. Finally, some whole-farm management scenarios using SSCM were synthesised in Chapter 7. A framework that enables evaluation of the long-term (50 years) farm outcomes soil carbon sequestration, nitrogen leaching and crop yield was established. The suitability of SSCM across whole-farms over the long term was investigated and it was found that the suitability of SSCM is confined to certain fields. This analysis also enabled identification of parts of the farms that are the least financially and environmentally viable. SSCM in conjunction with other PA management strategies is identified as a promising approach to long-term and whole-farm integrated management.
O'Brien, Michael J. (Michael James) 1981. "Performance analysis and algorithm enhancement of feature-aided-tracker (FAT) simulation software using 1-D high-range-resolution (HRR) radar signature profiles." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/30309.
Повний текст джерелаIncludes bibliographical references (p. 94).
The current Lincoln Laboratory (LL) MATLAB Feature-Aided-Tracker (FAT) software was adjusted and appended to provide a robust ground-target radar tracking simulation tool. It utilizes algorithms from the LL UAV Radar Moving Target Tracker (1991) and the LL FAT Tracking Software (2002). One-dimensional High-Range-Resolution (HRR) radar signature target profiles were used to assist in track-to-report data association through classification-aided and signature-aided tracking (CAT and SAT) algorithms. Profiles were obtained from the DARPA-sponsored Moving Target Feature Phenomenology (MTFP) program. Performance Analysis of this simulation tool reinforced the hypothesis that target aspect angle error estimation (state estimation) drives the performance of CAT, SAT, and Kinematic Tracking (KT) algorithms. A decaying exponential relationship exists between the Kalman filter estimate of target-speed and expected aspect angle error. This relationship was exploited to optimize the allocation of computational resources while enlarging the database aspect angle search in CAT to improve performance. Vehicle classification accuracy is improved by 70% and data association accuracy is improved by 12% in kinematically ambiguous situations such as when target intersections occur. SAT was improved 3% using this knowledge. Additionally, the target report HRR profile from each scan was used to generate an "On-The- Fly" SAT HRR profile database. This algorithm tests the similarity between the current target report HRR profile and the database HRR profiles. If there is sufficient resemblance, the report HRR is added to the database; if not, the database is reset.
(cont.) This information can be employed to provide up to a 9% performance improvement over the previous version of SAT in a best-case scenario. In realistic situations, a 6% performance improvement is still attainable. If a large, accurate database exists, near-perfect data association is achieved. Overall, the above technique adjustments provide an improvement of 6.3% (13.6% in realistic, GPS-generated scenarios) in data association accuracy over the initial FAT algorithm and a corresponding 28.8% improvement over the results of the KT itself.
by Michael J. O'Brien.
S.M.
Huang, Hsiau-Wen. "Investigation of solution structures of yeast and lupin seed 5S ribosomal RNAs by high resolution nuclear magnetic resonance and molecular dynamics simulation /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487684245468516.
Повний текст джерелаRata, Mihaela. "Endocavitary applicator of therapeutic ultrasound integrated with RF receiver coil for high resolution MRI-controlled thermal therapy." Phd thesis, Université Claude Bernard - Lyon I, 2009. http://tel.archives-ouvertes.fr/tel-00692346.
Повний текст джерелаDavoodi, Ali. "Mechanistic studies of localized corrosion of Al alloys by high resolution in-situ and ex-situ probing techniques." Doctoral thesis, Stockholm : Kemivetenskap, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4588.
Повний текст джерелаLiu, Chunde. "Creation of hot summer years and evaluation of overheating risk at a high spatial resolution under a changing climate." Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.725405.
Повний текст джерелаKhan, Fayaz A. "Two-dimensional shock capturing numerical simulation of shallow water flow applied to dam break analysis." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/7750.
Повний текст джерелаŞensoy, Levent. "Geo-Pet : a novel generic Organ-Pet for small animal organs and tissues." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/3186.
Повний текст джерелаLuu, Nhat Linh. "The role of human-induced climate change on extreme convective precipitation events in the south of France : a high-resolution model simulation approach." Electronic Thesis or Diss., université Paris-Saclay, 2020. http://www.theses.fr/2020UPASV018.
Повний текст джерелаThe France-Mediterranean area is frequently exposed to heavy precipitation events in the autumn whose daily accumulation can sometimes exceed 300 millimeters. There are a few studies showing the increasing trend in the frequency and intensity of these events (e.g. Vautard et al., 2015; Ribes et al., 2019). However, a formal extreme event attribution that links those changes to human-induced climate change for this area has never been done. This PhD subject aims at quantifying the role of human-induced climate change in altering the statistical properties of extreme convective precipitation event occurring over the France-Mediterranean focusing on the Cevennes mountain range and using a high-resolution model approach including convection-permitting model for the first time. I first analyze the EURO-CORDEX ensemble, which includes different combinations of global climate models and regional climate models. Then I conducted a set of numerical simulations with the WRF model at a convection-permitting resolution. I also compared the simulations with observations and high-resolution re-analyses. The results show that regional models can reproduce extreme convective rainfall events with better agreement with observations by increasing their horizontal resolution, especially to convection-permitting resolution (approx. 3 km). By using these simulations, I show that human-induced climate change consistently makes the 100-year 3-hourly and daily precipitation event at least 2 times more likely under current climate. The results also suggest the need of using multi-model approach to reduce the uncertainties in this type of impact study
Maronga, Björn [Verfasser]. "High-resolution large-eddy simulation studies of the turbulent structure of the convective boundary layer over homogeneous and heterogeneous terrain and implications for the interpretation of scintillometer data / Björn Maronga." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover (TIB), 2013. http://d-nb.info/1047414686/34.
Повний текст джерелаSchaaf, Benjamin [Verfasser], and Hans von [Akademischer Betreuer] Storch. "Added Value and regional effects in the multidecadal trends of a very high-resolution regional climate long-term model simulation at the coasts of Northern Germany / Benjamin Schaaf ; Betreuer: Hans von Storch." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2018. http://d-nb.info/1163394319/34.
Повний текст джерелаBates, Thomas Hathaway. "Sclerocactus wrightiae (Cactaceace): An Evaluation of the Impacts Associated with Cattle Grazing and the Use of Remote Sensing to Assess Cactus Detectability." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8986.
Повний текст джерелаConnors, Timothy W. "High resolution simulations of galactic cannibalism." Swinburne Research Bank, 2008. http://hdl.handle.net/1959.3/44962.
Повний текст джерелаA dissertation presented in fulfillment of the requirements for the degree of Doctor of Philosophy, Swinburne University of Technology - 2008. Typescript. Bibliography: p. 133-145.