Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"Multiscale Analysis"”.
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Multiscale Analysis of Macromolecular Systems
… understanding of macromolecular systems. A new multiscale method, Locally Scaled Diffusion Map (LSDMap), has been introduced to extract the optimal collective reaction coordinates from MD data without a priori knowledge of the system. The method decouples motions with different timescales into a …
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Multiscale analysis of financial volatility
… to enjoy the advantages of both forms of analysis. The thesis is divided into three sections. First, after briefly outlining the Fourier methods, a more exible technique that allows for the study of time-scale dependent phenomena (motivated from a discussion on Heisenberg's uncertainty …
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DIRECTIONAL MULTISCALE ANALYSIS USING SHEARLET THEORY AND APPLICATIONS
… emerged in recent years in applied harmonic analysis as a general framework to provide sparse representations of multidimensional data. This construction was motivated by the need to provide more efficient algorithms for data analysis and processing, overcoming the limitations of traditional …
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A multiscale analysis of heat transfer in porous media
… modes predicted by the basin stability analysis agrees well with the experiments from our IR thermography visualization setup.
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Multiscale analysis of localized, nonlinear, three-dimensional thermo-structural effects
… engineering applications such as structural analysis of hypersonic flight vehicles in extreme environments, computational modeling of weld processes, and development of semiconductor processing technology. Complex temperature gradients in the materials cause three-dimensional, localized, …
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Multiscale Analysis of Failure in Heterogeneous Solids Under Dynamic Loading
… is found to be about 1.5 km/s. Meso and multiscale analyses have revealed that microstructural details strongly influence when and where ASBs initiate and their paths. ASB initiation criteria for particulate composites and their homogenized counterparts are different.
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Impact of military maneuvers on Mojave Desert surfaces: A multiscale analysis
Concern for environmental management of our natural resources is most often focused on the human impacts upon these resources. Minor stresses on surface materials in sensitive desert landscapes can greatly increase the rate and character of erosion. The National Training Center, Ft. Irwin, located …
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Understanding Traffic Congestion Through Multiscale Analysis: Sensor Deployment, Car-Following and Universal Scaling
… This thesis approaches the problem through a multiscale framework, addressing how congestion is measured, modeled, and interpreted from both empirical and theoretical perspectives. Macroscopic representations of traffic states, such as the macroscopic fundamental diagram (MFD), are widely used …
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Computational multiscale analysis and optimization of multiphase hierarchical structures within a continuum micromechanics framework
… to develop computationally feasible and accurate multiscale analysis and optimization methods that rationally predict the mechanical behavior and self-adapting mechanisms of multiphase hierarchical systems across multiple scales. We focus on three objectives to accomplish the outlined goal. First, …
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The Phase Inversion-based Coal-CO₂ Slurry (PHICCOS) feeding system : design, coupled multiscale analysis, and technoeconomic assessment
… pressure limitations. In this work, a coupled multiscale approach is applied, which combines system-level analysis, component-level modeling, and micron-scale particle phenomena, for the development and assessment of a novel coal feeding system. The proposed Phase Inversion-based Coal-CO₂ …
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A multiscale analysis and quantification of human impacts on Sumatran tiger (Panthera tigris sumatrae) habitat in Riau, Sumatra
Worldwide, we are losing biodiversity at unprecedented rates, and due to deforestation, degradation and poaching, Southeast Asian wildlife is facing extreme threats. Indonesia recently eclipsed Brazil in having the world's highest deforestation rate, largely due to the rise of the palm oil …
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Computational Analysis of Silicon Nanoelectromechanical Systems
… we extend the quasicontinuum (QC) approach for multiscale analysis of silicon nanostructures at finite temperature. Three models, namely the real space quasiharmonic (QHM) model, the local quasiharmonic (LQHM) model, and the reciprocal space quasiharmonic (QHMK) model are investigated. Within …
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A Multiscale Method for Simulating Fracture in Polycrystalline Metals
… motivates the formulation of computational multiscale methods to link macroscopic failure to the underlying atomic processes from which all material behavior originates. A combined concurrent and sequential multiscale methodology is developed to analyze fracture mechanisms across length …
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THE YIELDING TRANSITION IN SOFT AMORPHOUS SOLIDS UNDER OSCILLATORY SHEAR: FROM MICROSCOPIC REARRANGEMENTS TO MACROSCOPIC FAILURE
… bright-field microscope, we provide a unique multiscale analysis of the yielding transition under oscillatory shear overcoming the limitation of conventional rheological measurements. Through a novel acquisition protocol and image analysis scheme, we are able to accurately monitor …
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Local and landscape scale effects of fragmentation on aerial insectivorous bats in the Amazon
… disturbance gradients and conduct a multiscale analysis of the relative influence of local versus landscape characteristics. All three facets of assemblage-level diversity exhibited degradation in the secondary forest matrix around the smallest fragments compared to continuous forest. …
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MULTI-SCALE DYNAMICS OF MECHANICAL SYSTEMS WITH FRICTION
… containing rough surface contact requires multiscale modeling and analysis approach. It is the goal of this research to develop simple methods for treating contact of rough surfaces so as to facilitate multiscale analysis of systems containing rough surface contact and friction. This …
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Rotary (redox) reactor-based oxy combustion chemical looping power cycles for CO₂ capture : analysis and optimization
… oxidation and reduction. In this thesis, a multiscale analysis for assessing the integration of the rotary CLC reactor technology in power generation systems is presented. This approach employs a sequence of models that successively increase the resolution of the rotary reactor …
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Advanced methods for change detection in VHR multitemporal SAR images
… several challenging issues related to the data analysis that should be addressed. Indeed, even though in the literature several techniques have been developed for the automatic analysis of multitemporal low- and medium-resolution SAR data, they are poorly effective when dealing with VHR images. …
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Physical Insights of Non-Premixed MILD Combustion using DNS
… of the energy cascade is analysed by applying a multiscale analysis methodology, called the bandpass filter method, on DNS of homogeneous isotropic turbulence. Evidence supporting this scale-locality were obtained and the results were found to be similar for Reynolds numbers ranging from 37 to …
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Layer-layer interactions in atmospheric, cryospheric, and stellar dynamics
… monsoon temperatures from both radiosondes and reanalysis have been cooling over the observational record, suggesting enhanced upwelling through the monsoon anticyclone, and increased stratospheric dehydration. The second system this dissertation focuses on is layered viscous flow. The fifth …
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