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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 97 for “"Ellipsoid"”.
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The Turbulent Flow of a Suspension Over an Ellipsoid of Revolution
Made available in DSpace on 2014-12-10T22:48:17Z (GMT). No. of bitstreams: 1 7310009.pdf: 3455154 bytes, checksum: cd4ee5b7c94867a8cd3ac47f353139f7 (MD5) Previous issue date: 1972
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Dynamics and Equilibria of N Point Charges on a 2D Ellipse or a 3D Ellipsoid
… where the sphere is replaced by a spheroid or ellipsoid. To get started, we first consider the problem in two dimensions, with point charges on circles (for which the equilibrium distribution is intuitively obvious) and ellipses. We then generalize the approach to the three dimensional case of …
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Two-sample ellipsoidal bounding in the context of parameter estimation
Although the Fogel-Huang algorithm, utilised in ellipsoid parameter estimation, uses the unique minimum-volume (Behrend-Löwner/John - BLJ) ellipsoid containing the intersection of an ellipsoid and a strip, the ellipsoid resulting from an iteration of the FH algorithm to find an ellipsoid bounding …
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A tool for reliability analysis of electrical power systems
… coverage for a particular Markov state, the ellipsoid bounding the reach set of the system dynamics associated to the Markov state needs to be computed first. Initial conditions are first selected and all possible maximum and minimum inputs combinations are simulated. Once simulated, an …
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Infinite staircases for Hirzebruch surfaces
… a classification of infinite staircases for the ellipsoid embedding functions of Hirzebruch surfaces. The ellipsoid embedding function is a generalization of symplectic ball packing problems. For a symplectic manifold, the function gives the smallest amount of which the symplectic form must be …
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Structural and algorithmic aspects of linear inequality systems
… In the first chapter, we reconsider the ellipsoid algorithm applied to solving a system of linear inequalities. Unlike the simplex method and interior point methods, the ellipsoid algorithm has no mechanism for proving that a system is infeasible (in the real model of computation). …
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β-Uniform Convexity and Divisible Domains
… geometries. When a divisible convex set is an ellipsoid, the Hilbert geometry it induces is the hyperbolic space. In general, strictly convex divisible domains exhibit negative curvature properties, but only the ellipsoid is a CAT(-1) space. The notion of p-uniform convexity from the theory of …
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Spatio-temporal microseismic analysis of the Woodford Shale, Canadian County, Oklahoma
… tensor is used to generate a characteristic ellipsoid for any set of microseismic events, and the aspect ratio of this ellipsoid can be related to local in-situ horizontal stress ratios. These methods are applied to surface microseismic data collected for six horizontal wells drilled and …
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Range-Based Autonomous Underwater Vehicle Navigation Expressed in Geodetic Coordinates
… system is not restricted to the WGS 84 ellipsoid and can be applied to any reference ellipsoid. This thesis documents the formulation of the navigation system in geodetic coordinates. Experimental data gathered in Claytor Lake, VA, and the Chesapeake Bay is presented.
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An Evolutionary Approach to Solving the Maximum Size Consecutive Ones Submatrix and Related Problems
… 2 ,...,x m } ⊆ R^n , what is the minimum volume ellipsoid that encloses it? Equally interestingly, one may ask: What is the maximum volume ellipsoid that can be embedded in the set of points without containing any? These problems have a number of applications beside being interesting in their own …
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Lagrangian Points and Jacobi Constants for a Class of Asteroids
… a special case, an asteroid in the shape of an ellipsoid. This approach is common but yields highly complex equations of motivation due to multiple terms in the spherical harmonics expansion. Finally the equivalence of the above two methods was validated by considering a configuration of a …
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Efficient Learning and Computation of Linear Correlated Equilibrium in General Convex Games
… efficient no-regret learning dynamics and ellipsoid-based methods for computing linear correlated equilibria—a relaxation of correlated equilibria and a strengthening of coarse correlated equilibria—in general convex games. These are games where the number of pure strategies is potentially …
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Steady and Unsteady Maneuvering Forces and Moments on Slender Bodies
… shape and a non-Body-of-Revolution scalene ellipsoid with a constant cross-section midbody. An analytical two-mode equation has been shown to accurately describe the normal force and pitch moment as well as side force and yaw moment for the ellipsoid body. It is based on the observation that …
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High-temperature structural properties of the refractory rare-earth tungsten oxides
… lattice parameter approach and thermal expansion ellipsoid analysis. Both phenomena are studied in conditions identical to, or exceeding, the demands of real-world applications. Characterization is done in terms of fundamental crystal lattice constituents and property trends are extended across …
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A continuum model for needlepunched nonwoven fabrics
… representation of the network anisotropy (fabric ellipsoid). An orthotropic elastic constitutive model for the elastic response of nonwoven fabrics is then formulated based on this structural measure and deformation mechanisms of the network structure. The inelastic component of the model is then …
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Study of Fluid Forces and Heat Transfer on Non-spherical Particles in Assembly Using Particle Resolved Simulation
… in flow through a fixed random assembly of ellipsoidal particles with sphericity of 0.887. The incompressible Navier-Stokes equations are solved using the Immersed Boundary Method (IBM). A Framework for generating particle assembly is developed using physics engine PhysX. High-order boundary …
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Investigating mechanisms of genome folding by single-cell Hi-C
… all mESCs, including: the genome shape is an ellipsoid; the chromosomes arrange in a Rabl configuration; the A and B compartments form a bowl-like structure; and active enhancers, promoters along with gene expression cluster together in the A compartment. In contrast, relatively local features …
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How to Accurately Map the Milky Way with a Billion Sources: A Journey into the Gaia-verse
… My case study of the tilt of the local velocity ellipsoid demonstrates this. Well-constructed distances for the Gaia DR2 RVS sample return a velocity ellipsoid broadly consistent with spherical alignment. Using the reciprocal parallax distance estimator significantly alters the conclusions. I …
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Some sequential estimation problems in logistic regression models
… n)$ $\le n\lambda d\sp2\}$ defines a confidence ellipsoid for $\beta\sb0$, with maximum axis $\le 2d$ and $P(\beta\sb0\in R\sb d)\approx 1 - \alpha$ provided $n\ge a\sp2/(\lambda d\sp2),$ where $\lambda$ is the smallest eigenvalue of $\Sigma$ and a satisfies $P(\chi\sp2(p)\le a\sp2)$ = $1 - …
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Robust Online Trajectory Prediction for Non-cooperative Small Unmanned Aerial Vehicles
… particle filters together with Löwner-John ellipsoid to approximate the highest posterior density region for trajectory prediction and uncertainty quantification. The particle filter is tuned and tested on real-world and simulated data sets and compared with the Kalman filter. A parallel …
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