Browsing George R. Brown School of Engineering by Title
Now showing items 41-60 of 3651
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A Consortium Proposal: "The Rice Inversion Project"
(1992-11)This document details a proposal for an industrially sponsored consortium for research in seismic inversion at Rice University. This consortium project will be directed by Professor William W. Symes in the Department of ... -
A Context-Aware Trust Framework for Resilient Distributed Cooperative Spectrum Sensing in Dynamic Settings
(2017)Cognitive radios enable dynamic spectrum access where secondary users (SUs) are allowed to operate on the licensed spectrum bands on an opportunistic noninterference basis. Cooperation among the SUs for spectrum sensing ... -
A Convergence Theory for a Class of Quasi-Newton Methods for Constrained Optimization
(1983-05)In this paper we develop a general convergence theory for a class of quasi-Newton methods for equality constrained optimization. The theory is set in the framework of the diagonalized multiplier method defined by Tapia ... -
A Convergence Theory for the Structured BFGS Secant Method with an Application to Nonlinear Least Squares
(1987-05)In 1981, Dennis and Walker developed a convergence theory for structured secant methods which included the PSB and the DFP secant methods, but not the straightforward structured version of the BFGS secant method. Here we ... -
A Curvilinear Search Method for p-Harmonic Flows on Spheres
(2008-01)The problem of finding p-harmonic flows arises in a wide range of applications including micromagnetics, liquid crystal theory, directional diffusion, and chromaticity denoising. In this paper, we propose an innovative ... -
A Data and Platform-Aware Framework For Large-Scale Machine Learning
(2015-04-24)This thesis introduces a novel framework for execution of a broad class of iterative machine learning algorithms on massive and dense (non-sparse) datasets. Several classes of critical and fast-growing data, including image ... -
A DEIM Induced CUR Factorization
(2014-07)We derive a CUR matrix factorization based on the Discrete Empirical Interpolation Method (DEIM). For a given matrix A, such a factorization provides a low rank approximate decomposition of the form A ≈ CUR, where C and R are ... -
A Deterministic Model for Parallel Program Performance Evaluation
(1998-12-03)Analytical models for parallel programs have been successful at providing simple qualitative insights and bounds on scalability, but have been less successful in practice for predicting detailed, quantitative information ... -
A Diagonal-Secant Update Technique for Sparse Unconstrained Optimization
(1992-01)This paper presents a diagonal-secant modification of the successive element correction method, a finite-difference based method, for sparse unconstrained optimization. This new method uses the gradient values more efficiently ... -
A Differential Semblance Criterion for Inversion of Multioffset Seismic Reflection Data
(1992-05)Mean-square error leading to least-squares inversion of multioffset reflection seismograms is insensitive to velocity trend information except in the immediate vicinity of a kinematically correct model. In contrast, differential ... -
A Distributed-Memory Randomized Structured Multifrontal Method for Sparse Direct Solutions
(2017)We design a distributed-memory randomized structured multifrontal solver for large sparse matrices. Two layers of hierarchical tree parallelism are used. A sequence of innovative parallel methods are developed for randomized ... -
A Domain Decomposition Method for Parabolic Equations Based on Finite Elements
(1990-10)A domain decomposition procedure for solving parabolic partial differential equations is presented. In this scheme, a Galerkin finite element discretization on a rectangular mesh is used. Boundary values at subdomain ... -
A Domain Decomposition Method for the Acoustic Wave Equation Allowing for Discontinuous Coefficients and Grid Change
(1994-01)A domain decomposition technique is proposed for the computation of the acoustic wave equation, in which the bulk modulus and density fields are allowed to be discontinuous at the interfaces. Inside each subdomain, the ...
