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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 552 for “"Stiff"”.
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Approximation of Large Stiff Acausal Models
… are prone to computational problem called stiffness. In this thesis, we aim to alleviate these issues by the use of approximate models called surrogates, which match the full system to high fidelity whilst being inexpensive to simulate. In this thesis, we introduce a general data-driven …
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Statistics and dynamics of stiff chains
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1996.
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Pressuremeter testing in miocene stiff clays
… difficult to obtain reliable soil parameters for stiff clays. Laboratory testing results are often scattering due to the fissures and slickensides in these soils. Alternatively, in situ techniques offer a means to test the soils in place. This study focuses on in situ testing in Miocene stiff …
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Difference Methods for Stiff Delay Differential Equations
… methods for approximating the solutions of stiff delay systems require special stability properties that are generalizations of those employed for stiff ordinary differential equations. Using the model equation (y'(t) = py(t) + qy(t-1), with complex p and q, the definitions of A-stability, …
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Mechanisms of strength loss in stiff clays
On September 14, 1981 a major slide was discovered in the upstream slope of San Luis Darn, located about 100 miles southeast of San Francisco, California. The slide occurred at the end of a period of rapid drawdown of the reservoir. Although this was the longest and fastest drawdown in the life of …
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Lateral response of stiff column-supported shallow foundations
… mechanisms that control the lateral response of stiff column-supported shallow foundations, resulting from the application of horizontal load on shallow foundations supported by stiff columns, are uncertain. Stiff columns constructed in soft clayey soil have been used to support retaining walls …
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Factors associated with stiff knee gait in cerebral palsy
Stiff knee gait (SKG) is one of a few classified walking patterns which people with cerebral palsy (pwCP) can present with. The characteristic for SKG is delayed and/or reduced peak knee flexion during swing phase, which can reduce walking ability and result in functional restrictions. Through the …
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Modeling and Control of Stiff Robots for Flexible Manufacturing
… fulfill the requirements on accuracy, mechanical stiffness and conceptual flexibility of a robot for SMEs. Additionally, concepts that aid the SMEs to achieve the required accuracy and a more intuitive robot operation were developed and evaluated. The modeling of the Gantry-Tau robot includes both …
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Engineering Collagen Nanostructure to Enable Stiff & Tough Cartilage Biomaterials
Collagen is the main component of extracellular matrices (ECM) throughout the body, and the main structural component of cartilage tissue. As such, collagen has been widely investigated as a biomaterial for tissue engineering. However, the process of extracting collagen and processing it to form …
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Movement of landslides in stiff clays and clay shales
… test data on undisturbed and remolded soft- to stiff- clays, reported in the literature, were analyzed. An empirical correlation for secant residual friction angle for a wide range of clay compositions with plasticity index in the range of 10 to 250%, was extended to 8 different effective normal …
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Automatic Construction of Scalable Time-Stepping Methods for Stiff PDES
… to be highly scalable time-stepping methods for stiff nonlinear PDEs. However, ensuring this scalability requires analytic computation of frequency-dependent quadrature nodes from the coefficients of the spatial differential operator. This thesis describes how this process can be automated for …
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Numerical Solution of Stiff Ordinary Differential Equations Using Collocation Methods
Made available in DSpace on 2014-12-13T18:01:52Z (GMT). No. of bitstreams: 1 7709075.pdf: 2874498 bytes, checksum: 35500be9b4b4d0fe80f9e6e16eb670ad (MD5) Previous issue date: 1976
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A Search for Better Linear Multistep Methods for Stiff Problems
Made available in DSpace on 2014-12-13T18:02:03Z (GMT). No. of bitstreams: 1 7820980.pdf: 2930687 bytes, checksum: 9f6160a6f11a4399eb61da34a1bb71e3 (MD5) Previous issue date: 1978
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Drained shear strength of stiff clays for slope stability analyses
… involving previous and no previous sliding in stiff clays, and develop empirical relationships that describe the stress-dependent nature of the residual and fully softened shear strengths in terms of soil index properties. To investigate the drained residual strength, a Bromhead ring shear …
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The solid state structure and properties of stiff chain aramids
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1990.
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Centrifuge modelling of high shear capacity ribbed piles in stiff clay
… previous research into the behaviour of piles in stiff clay. This thesis details the achievements of a two year research programme into the behaviour of high shear capacity ribbed piles in stiff clay. The research has been jointly funded by Expanded Piling Limited and the Geotechnical Engineering …
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The Synthesis, Characterization, and Properties of Stiff, Hydrophilic, Dendritic, Phenylacetylene Macromolecules
A series of phenylacetylene dendrimers bearing t-butyl ester groups on their periphery were prepared by a modified convergent growth scheme. The structures of these organic soluble compounds were confirmed by a variety characterization techniques including NMR, mass spectrometry, elemental …
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Fluctuating and Phase -Stiff Proximity-Induced Superconductivity in Superconductor-Semiconductor Junctions
… A transition from fluctuating to phase-stiff proximity induced superconductivity is observed in the semiconductor at temperatures often well below the transition temperature of the superconductor. This phenomenological interpretation is supported by the fact that the enhancement observed …
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Analysis and Control of a Class of Stiff Linear Distributed Systems
… the spectral decomposition of the so-called "stiff" operators (using the terminology of {24}) is investigated, including the convergence of their eigenvalue-eigenvector pairs as (epsilon) (--->) 0, with the objective of clarifying their singular behavior. Second, asymptotic approximation of …
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Fluctuating and Phase-Stiff Proximity-Induced Superconductivity in Superconductor-Semiconductor Junctions
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-12T20:35:18Z No. of bitstreams: 1 Flexner_Soren.pdf: 2503941 bytes, checksum: 4646cbf0724296f40230d75e01af9c89 (MD5)
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