Global ETD Search
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 3986 for “"exact"”.
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Exact genome alignment
… genome sequences from primates and mammals. An exact genome alignment technique is used by breaking the entire genome into fragments and aligning these fragments with the reference genome using the Smith-Waterman based method. A comparison of the two methods reveals that the second approach …
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More or less exact
More or Less Exact tests the fidelity of material control by hands, by machines, and by the interaction of the two. We overlap two models of exactitude within the discipline of architecture to expose a design space at their intersection. One model, underlying Western practice since modernism, is …
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Exact sampling with Markov chains
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1996.
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Filter-bank transforms with exact inverses
… an iterative scheme is presented that achieves exact inversion to an arbitrary accuracy. The methods to obtain synthesis filters are applied to discretizations of the continuous wavelet transform using both finite and infinite impulse response filters. If exact reconstruction is not a requisite, …
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Stabilizing spectral functors of exact categories
This Dissertation was approved for publication on 2017-07-13 at 15:08.
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Surgery Exact Triangles in Instanton Theory
The introduction of instanton Floer theory and Donaldson polynomial invariants in the 1980s revolutionised the study of low dimensional topology. Since then, many Floer theories have been introduced with different structural properties and qualitative features. One of these Floer theories, Heegaard …
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Random and exact structures in combinatorics
… to allow the construction or extraction of exact behavior. I have chosen three directions along which to study this theme: the singularity of discrete random matrices, thresholds for Steiner triple systems, and improved bounds for Szemerédi's theorem. Each concerns breakthroughs in central …
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Exact and variational investigations of Hubbard rings
… energy. From the Lieb-Wu equations we derive an exact expression for the ground state energy in the atomic limit. We obtain our result by exploiting the spin symmetry of the Hubbard Hamiltonian. Our energy is lower than that obtained by previous published results, and we are able to explain why …
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Hybrid density functionals with proper exact exchange
… design, hybrid DFAs are supposedto use the exact exchange (EXX). However, when hybrid functionals were originally intro-duced, there was no simple method to compute EXX, so all of their practical implementationsstarted using the Hartree–Fock exchange (HFX), which can be computed easily and …
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DUALITIES AND EXACT RESULTS IN SUPERSYMMETRIC QFTS
… procedures. In Part II we study exactly marginal deformations of 4d SCFTs and identify instances of theories that flow to different points of the same conformal manifold, a phenomenon denoted as conformal duality. We study a series of 4d N=1 theories engineered by a stack of …
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Generalised cohomology and relatively exact Lagrangian submanifolds
… this thesis, we study the topology of relatively exact Lagrangian submanifolds. One of our main goals is to study their generalised cohomology, extending known results about their singular cohomology. We do this using different (and simpler) technical set-ups to that of Cohen, Jones and Segal [18, …
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Characterizing exact arithmetic abilities before formal schooling
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
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Exact Byzantine consensus under local-broadcast channels
We consider the problem of achieving exact consensus with Byzantine faults under a local-broadcast communication channel. We prove necessary and sufficient conditions on the underlying communication graph to achieve consensus. We show that under this model consensus is possible on undirected graphs …
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Exact powers of some multivariate test criteria
In this thesis an algorithm for the noncentral linear density and cumulative distribution function of Wilks' likelihood ratio criterion in MANOVA is derived and it is shown how this algorithm, with modifications, can be used to find the distributions of a number of test criteria for different …
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Exact geometry algorithms for robotic motion planning
… algorithm that can almost always identify the exact optimal solution as a system of differential equations, which can be numerically solved to produce an asymptotically-optimal solution.
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Exact rotamer optimization for computational protein design
… residues is dense. In this thesis, we present an exact solution method, named BroMAP (branch-and-bound rotamer optimization using MAP estimation), for such protein design problems. The design goal of BroMAP is to be able to expand smaller search trees than conventional branch-and-bound methods …
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Exact Diagonalization Studies of Strongly Correlated Systems
In this dissertation, we use exact diagonalization to study a few strongly correlated systems, ranging from the Fermi-Hubbard model to the fractional quantum Hall effect (FQHE). The discussion starts with an overview of strongly correlated systems and what is meant by strongly correlated. Then, we …
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Exact Solutions to Lattice Models of Polymer Adsorption
… solved to study a variety of physical properties exactly. One solution method is to solve the recurrences with generating functions. Additionally, we may attempt to derive the partition function of the model, which explicitly provides the walk entropy per length. In this thesis, the solution to a …
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Exact Sampling and Optimisation in Statistical Machine Translation
… distribution is too complex to be represented exactly and one typically resorts to approximation techniques either to perform optimisation { the task of searching for the optimum translation { or sampling { the task of nding a subset of translations that is statistically representative of the …
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