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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 612 for “"Inhomogeneous"”.
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Learning on Inhomogeneous Hypergraphs
Although graphs are widely used in a myriad of machine learning tasks, they are limited to representing pairwise interactions. By contrast, in many real-world applications the entities engage in higher-order relations. Such relations can be modeled by hypergraphs, where the notion of an edge is …
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Optimal Control of Inhomogeneous Ensembles
… for the inherent dispersion caused by the inhomogeneous parameter values. We compose an optimal ensemble control problem and develop a computational method based on pseudospectral approximations to solve these complex problems. This class of ensemble systems is strongly motivated by natural …
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Sound Propagation in Inhomogeneous Media
Outdoor sound propagation is of interest in community noise problems, for example noise prediction. The interaction of sound with the ground is also of interest in remote surveillance by acoustic and seismic sensors. In this thesis, previous work concerned with sound propagating in a layered …
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Current flow in inhomogeneous superconductors
"The change of normal current flow into supercurrent flow is examined in a number of problems in which the pair potential of the superconductor can vary spatially. We examine approximate solutions to the Bogoliubov equations in the limits that the pair potential, ~('f), varies quickly or slowly …
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Electrostatic oscillations in inhomogeneous plasmas
… of longitudinal electrostatic oscillations in inhomogeneous, one-dimensional plasmas is examined in several areas. First the question is considered regarding whether the Vlasov-Maxwell equations will allow a plasma system to evolve naturally toward a preassigned stationary, inhomogeneous state …
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Optical Wave Propagation in Inhomogeneous Turbulence
Made available in DSpace on 2014-12-12T20:54:29Z (GMT). No. of bitstreams: 1 7709063.pdf: 2655007 bytes, checksum: 0e85b400ea89b10cae02d3d79fd7b755 (MD5) Previous issue date: 1976
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DNS of inhomogeneous reactants premixed combustion
… designed to operate under lean conditions with inhomogeneous reactants to ensure cleanliness and stability of the combustion. This ushers in a new mode of combustion, called the inhomogeneous reactants premixed combustion. The present study investigates the effects of inhomogeneous reactants on …
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Investigating multi-directional inhomogeneous granular suspensions
Granular flows in rotating drums find many applications in industry, even though the dynamics of their granular media is not fully understood. Several models of granular flow and granular suspensions (where a viscous fluid is present in the voids between the granular particles) have been proposed …
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Nonequilibrium statistical mechanics of inhomogeneous systems.
Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Chemistry.
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Inhomogeneous Stokes flow through porous media
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1995.
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Bogoliubov Excitations of Inhomogeneous Bose-Einstein Condensates
… of interacting ultracold bosons in presence of inhomogeneous external potentials are studied. The first part deals with repulsively interacting Bose-Einstein condensates in speckle disorder potentials. In the Bogoliubov approach, the many-body problem is split into the Gross-Pitaevskii …
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Propagation of molecular outflows into inhomogeneous media
Molecular clouds have inhomogeneous density profiles and have been observed to be `clumpy' in nature, containing dense cores, rarefied filaments and cocoons. Energetic mass-ejection phenomena created during the gravitational collapse of dense cores are thought to be responsible for the molecular …
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Analysis of solitary waves in inhomogeneous systems
In this thesis, we aim to investigate solitary waves of three nonlinear Schrödinger (NLS)-type models, namely, the NLS equation with an asymmetric double Dirac delta potential, the NLS equation with a Dirac delta potential on star graphs, and the discrete nonlinear Schrödinger (DNLS) equation. For …
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Imaging Techniques and Hardware for Inhomogeneous MRI
… the image to be reconstructed. In the case of an inhomogeneous static field, gradient fields that are not linear, or gradients that are not pointed along B0, there will be no Fourier transform relationship, but a linear relationship does exists and imaging is still possible. This thesis explores …
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Elastic wave scattering in laterally inhomogeneous media
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 1991
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Noise from a Rotor Ingesting Inhomogeneous Turbulence
On-blade hot wire anemometry measurements as well as far field sound measurements at several receiving angles have been previously made for a rotor partially embedded in a boundary layer. The inflow distortion effect on the rotor angle of attack distribution was determined directly from the …
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MULTIPLE SCATTERING FROM A RANDOM AND INHOMOGENEOUS SLAB
… reflection and transmission functions of an inhomogeneous slab are calculated by labeling the wave by the number of reflections it has undergone in the medium. The Riccati equation, satisfied by the reflected amplitude, is decomposed into a finite set of linear equations by taking into …
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The Transition Probability of the Inhomogeneous q-TAZRP
In this thesis we study the transition probability of the q-TAZRP, a special form of the n-particle totally asymmetric zero-range process (TAZRP) on the lattice Z defined by Sasamoto and Wadati in [J. Phys. A, vol. 31 6057--6071 (1998)]. We generalise the result by Korhonen and Lee in [J. Math. …
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Fast Algorithm for Electrically Small Inhomogeneous Medium Structures
With the above accomplishments, electrically small composite structures involving lossless or lossy materials can be solved with O( N) computational cost.
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Crack path selection in microstructurally tailored inhomogeneous polymers
… are exploited to generate a host of different inhomogeneous arrangements that can help us experimentally study crack path selection problems. The model material which we are using is a polyethylene co-polymer, ECO, whose photosensitive behavior allows alterations in its mechanical properties …
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