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 48 for “"fast algorithm"”.
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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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Fast Algorithm for Modeling of Rain Events in Weather Radar Imagery
Weather radar imagery is important for several remote sensing applications including tracking of storm fronts and radar echo classification. In particular, tracking of precipitation events is useful for both forecasting and classification of rain/non-rain events since non-rain events usually appear …
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A fast algorithm for approximating hydrodynamic lubrication interactions between elastic particles
Made available in DSpace on 2010-08-20T17:56:31Z (GMT). No. of bitstreams: 3 Higa_Kenneth.pdf: 2312620 bytes, checksum: ec5ce7a5b2725293e6f6bfeb9258614c (MD5) 1_Higa_Kenneth.pdf: 2312665 bytes, checksum: aef11826adce2877b64cc45c9460c85f (MD5) license.txt: 4059 bytes, checksum: …
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Fast algorithm and surface integral equations for two-dimensional materials modeling
… dissertation, a wide-band two-dimensional (2D) fast multipole algorithm (FMA) with a novel diagonalization form is presented. The conventional diagonalization of 2D FMA can be derived based on the interpretation of Parseval's theorem. The performance of FMA in the twilight zone (between the …
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Fast algorithm for joint unicast and multicast beamforming in large-scale systems
… direction method of multipliers (ADMM)-based fast algorithm that efficiently obtains the beamforming solutions for unicast and multicast users to minimize the transmit power subject to quality-of-service constraints. Utilizing the optimal multicast beamforming structure obtained recently, we …
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Multilevel Multipole -Free Fast Algorithm for Electromagnetic Scattering Problems in Layered Media
Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs
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A fast algorithm for the string editing problem and decision graph complexity
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 1976
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Development of the Fast Multipole Method for Stratified Medium
… part of this thesis is devoted to developing a fast algorithm to calculate the scattering by a perfect electrically conducting (PEC) body embedded in a single layer of a layered medium. A symmetric form of the dyadic Green's function is derived. All image scalar Green's functions within the …
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A Fast Minimal Infrequent Itemset Mining Algorithm
A novel fast algorithm for finding quasi identifiers in large datasets is presented. Performance measurements on a broad range of datasets demonstrate substantial reductions in run-time relative to the state of the art and the scalability of the algorithm to realistically-sized datasets up to …
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Remote sensing of rapidly draining supraglacial lakes on the Greenland Ice Sheet
… lake area and volume tracking method (“the FAST algorithm”). For this, various methods for automatically calculating lake areas and volumes with MODIS are tested, and the best techniques are incorporated into the FAST algorithm. The FAST algorithm is applied to the land-terminating Paakitsoq …
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Coordinated multicast beamforming for multi-cell massive MIMO systems
… concex approximation (SCA). To further design a fast algorithm applicable to massive MIMO systems, we apply the alternating direction method of multipliers (ADMM) technique and propose an ADMM-based first-order algorithm to solve the quality of service (QoS) problem, which decompose the QoS …
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Fast Inhomogeneous Plane Wave Algorithm for Electromagnetic Scattering Problems
The fast inhomogeneous plane wave algorithm (FIPWA) has been developed and successfully applied to solving large-scale electromagnetic scattering problems, both in free space and in the presence of a multilayered medium. A multilevel program has been implemented. The resultant computational …
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Augmented Surface Integral Equation Method for Low-Frequency Electromagnetic Analysis
… solved with appropriate preconditioning and fast algorithm acceleration. As required in many applications, a generalized impedance boundary condition (GIBC) formulation is developed to handle the skin effect rigorously and efficiently. It degenerates into traditional methods with two steps of …
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Improving the Performance of a Hybrid Classification Method Using a Parallel Algorithm and a Novel Data Reduction Technique
… parallel version of the hybrid classification algorithm IGSCR (iterative guided spectral class rejection) and a novel data reduction technique that can be used in conjuction with pIGSCR (parallel IGSCR). The parallel algorithm is motivated by a demonstrated need for more computing power driven …
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Theory and applications of scattering and inverse scattering problems
Two algorithms based on the recursive operator algorithm are proposed to solve for the scattered field from an arbitrarily shaped, inhomogeneous scatterer. By discretizing the object into N subobjects, the scattering solution of an arbitrarily shaped inhomogeneous scatterer can be formulated as a …
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Computational Algorithms for Face Alignment and Recognition
… industry due to developments in face recognition algorithms, human head detection algorithms, and faster/low cost computers. Despite these advances, however, there are still some critical issues that affect the performance of real-time face recognition software. This paper addresses the problem of …
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Evaluation of Radiobiological Effects in Intensity Modulated Proton Therapy : New Strategies for Inverse Treatment Planning
… are presented. These strategies are based on a fast algorithm for three-dimensional calculations of the dose averaged linear energy transfer (LET) as a measure of the local radiation quality, and on a simple phenomenological approach for the RBE as a function of dose, LET and tissue type. It was …
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Optimal and Permissible Sampling Rates for First-Order Sampling of Two-Band Signals
… on the proposed sampling method, including a fast algorithm for computing all feasible sampling rates for two-band passband signals.
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EXPLORATIONS IN QUANTUM GRAVITY AND CONFORMAL BOOTSTRAP
… bootstrap. My collaborators and I developed a fast algorithm for bootstrapping two dimensional CFTs using the modular bootstrap. By bootstrapping theories with large central charge, we found a new bound on the scaling dimension of the spectral gap. Chapter five is about the black hole …
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Design and evaluation of a data-dependent low-power 8x8 DCT/IDCT
Traditional fast Discrete Cosine Transform (DCT)/ Inverse DCT (IDCT) algorithms have focused on reducing arithmetic complexity and have fixed run-time complexities regardless of the input. Recently, data-dependent signal processing has been applied to the DCT/IDCT. These algorithms have variable …
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