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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 1421 for “"approximations"”.
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Concept Approximations
… a lattice theoretical approach to the field of approximations. Given a pair consisting of a kernel system and a closure system on an underlying lattice, one receives a lattice of approximations. We describe the theory of these lattices of approximations. Furthermore, we put a special focus on …
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Structured Rough Set Approximations
… learning and data mining. Lower and upper approximations are two fundamental notions for concept analysis with rough set theory. In rough set theory, one can obtain two kinds of sets in an information table, namely, definable and undefinable sets. Intuitively, a definable set represents …
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Gaussian processes:iterative sparse approximations
In recent years there has been an increased interest in applying non-parametric methods to real-world problems. Significant research has been devoted to Gaussian processes (GPs) due to their increased flexibility when compared with parametric models. These methods use Bayesian learning, which …
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Engineering Approximations for Chemical Kinetics
While the Marcus equation had been developed to model electron transfer reactions, many researchers have applied it to atom transfer reactions. The model works well until very exothermic or endothermic reactions are encountered. However, including a Pauli repulsion term in the derivation of the …
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Successive Approximations in Nonlinear Thermoelasticity
Made available in DSpace on 2014-12-12T00:25:57Z (GMT). No. of bitstreams: 1 7500472.pdf: 1537703 bytes, checksum: c2822f776f8c697d357505f6f1a285d9 (MD5) Previous issue date: 1974
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Approximations for Singular Integral Equations
… The goal of this work is to provide accurate approximations for weakly singular neutral equations using finite elements as basis functions for the initial function space. Several examples are presented in order to validate the numerical scheme.
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Approximations by means of continued fractions
Rational approximations to real numbers have been used from ancient times, either for convenience in computation, or due to lack of more precise knowledge of the magnitude of the numbers. Better approximations may be obtained by making corrections in the form of adding aliquots, adjusting …
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ACCURACY-AWARE APPROXIMATIONS FOR ERROR ANALYSIS
… This work demonstrates the need for predictive approximations and automatic error analysis. Results from 6 DSP programs show that tuning the bitwidth of floating point programs to their arbitrary precision fixed point equivalents can yield upto 82 and 66 percent average reduction in resources …
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Approximations for Economic Efficiency and Fairness
… and improve the design of provably guaranteed approximations on an ideal yet impossible level of efficiency and fairness. En route, we resolve several open questions in computational social choice and mechanism design.</p>
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Sparse Gaussian Process Approximations and Applications
… over functions. Gaussian process models require approximations in order to be practically useful. This thesis focuses on understanding existing approximations and investigating new ones tailored to specific applications. We advance the understanding of existing techniques first through a thorough …
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High-energy approximations to nuclear scattering
We study high-energy approximations to nuclear scattering. These are based on expansions of the free-particle propagator. We distinguish the eikonal expansion and the Fresnel expansion and interpret their physical meaning in optical terms. A "Fresnel approximation" is defined as a partial sum of …
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Consistency and convergence of SPH approximations
This thesis is about a new approach to SPH. Instead of using a single kernel or shape function for approximation of a function and its derivatives, individual shape functions are used for each derivative. The investigation is carried out in one space dimension. After producing the conditions for …
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Approximations to the Lévy LIBOR Model
In this thesis, we study the LIBOR Market Model and the Lévy-LIBOR. We first look at the construction of LIBOR Market Model (LMM) and address the major problems associated with specifically the drift component of LMM. Due to the complexity of the drift for LMM, the Monte Carlo method seems to be …
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Finite element approximations of Burgers' equation
This work is a numerical study of Burgers' equation with Neumann boundary conditions. The goal is to determine the long term behavior of solutions. We develop and test two separate finite element and Galerkin schemes and then use those schemes to compute the response to various initial conditions …
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