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 104 for “"Iterative approach"”.
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An iterative approach to operators on manifolds with singularities
We establish elements of a new approach to ellipticity and parametrices within operator algebras on manifolds with higher singularities, only based on some general axiomatic requirements on parameter-dependent operators in suitable scales of spaes. The idea is to model an iterative process with new …
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Iterative approach to position location in packet radio networks
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1985.
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A multi-scale iterative approach for finite element modeling of thermal contact resistance
… work combines measured surface geometry with an iterative thermal/structural finite element model to more accurately predict microscopic and macroscopic thermal contact resistance. A commercial power electronics module which exhibits both macroscopic surface form and micro scale surface roughness …
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Performance of turbo multi-user detectors in space-time coded DS-CDMA systems
… we divide these receivers into the Partitioned Approach (PA) and the Iterative Approach (IA) receivers. To enable the iterative exchange of information, these receivers employ a Parallel Interference Cancellation (PIC) detector as the first receiver stage.
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Geometrically nonlinear finite element analysis of space frames
… accuracy, economy and limitations. An iterative approach, either Newton-Raphson iteration or modified Riks/Wempner iteration, is employed to trace the nonlinear equilibrium path. The latter can be used to perform postbuckling analysis.
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A novel equivalence method for high fidelity hybrid stochastic-deterministic neutron transport simulations
… method, SuPerHomogenization in three different approaches to obtaining equivalence factors: a same-scale iterative approach, a multiscale approach, and a single-step non-iterative approach. Both methods show remarkable agreement with a reference Monte Carlo solution on a wide array of test …
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Self-adaptation via concurrent multi-action evaluation for unknown context
… where a system encounters unknown contexts, the iterative approach would become unfeasible when the size of the action space increases. Providing efficient solutions to this problem has been the main goal of this research project. Based on the developed abstract model, the designed methodology …
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Knowledge management: the issue of multimedia contents
… we want to represent Knowledge through a mixed-iterative approach, where top-down and bottom-up analyses of the knowledge domain which has to be represented are applied: these are typical approaches for this kind of problems. In this case, they are applied following an iterative approach which …
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Planar Motion and Visual Odometry: Pose Estimation from Homographies
… motion and pose is presented, along with an iterative approach for determining the parameters. Paper B describes how to extend the method in Paper A to use more than one homography at a time in the estimation process, thereby improving the estimation accuracy and robustness. Paper C presents …
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The Foundation for CADSPAM: Computer Aided Design of SPAtial Mechanisms
… to analyze any lower pair mechanism using the iterative approach developed by Sheth and Uicker [1972]. Unlike precision point synthesis methods that allow only a limited number of positions to be specified, optimization will be employed to synthesize a wide variety of mechanisms. This approach …
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Large Scale Simulations of Brownian Suspensions
… by employing a Particle-Mesh-Ewald (PME) approach whereby near-field interactions are evaluated directly and far-field interactions are evaluated using a grid based velocity computed with FFT's. This approach is readily extended to include the effects of Brownian motion. For interacting …
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Acoustic sounding of snow water equivalent
… of changes in acoustic impedance. Using an iterative approach involving boundary conditions at the interfaces, the depth-integrated SWE was determined using the Berryman equation from porous media physics. Apparatuses used to send and receive sound waves were designed and deployed during the …
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Aerosol optical depth retrievals from high-resolution commercial satellite imagery over areas of high surface reflectance
… proportional to total optical depth. Using an iterative approach, surface reflectance and mean aerosol reflectance can be partitioned to refine the retrieved total optical depth and, ultimately, determine the aerosol optical depth. Initial results based on QuickBird imagery and AERONET data …
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Estimating True Object Color from a Single Image and Multiple Images
… color variations in images and introduce a novel approach for simultaneously estimating the diffuse and specular reflections from a collection of images based on the dichromatic reflection model. By minimizing a cost function, the observed color in a scene can be decomposed into diffuse reflection …
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Single Transponder Range Only Navigation Geometry (STRONG) applied to REMUS autonomous under water vehicles
… study was conducted to prove the concept of an iterative approach to single transponder navigation for REMUS Autonomous Underwater Vehicles (AUVs). Although the concept of navigation with one acoustic beacon is not new, the objective was to develop a computer algorithm that could eventually be …
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Job Sequencing & WIP level determination in a cyclic CONWIP Flowshop with Blocking
… 'M', to be maintained. This research proposes an iterative procedure to determine this optimal level. The second main issue is the optimization of the line by determining an appropriate job sequence. This research assumes a 'permutational' scheduling policy and proposes an iterative approach to …
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Charging of aggregate grains in astrophysical environments.
… A 3D numerical model employing a self-consistent iterative approach to compute the aggregate charge is introduced. Different size distributions for cosmic dust grains are used in the simulation. The results are compared with previous work on spherical grains, and it is shown that the charging of …
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An economic model of highway fatalities
… highway fatality equation was estimated via an iterative approach using ordinary least squares. The variables testing significant include: average speed, speed variance, drinking age for beer, percentage of drivers under 25 years of age, and percentage of urban roads. When translating the …
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Durability of glass and ceramic fibres within the lung.
… of such inorganic fibres.This study used an iterative approach to determine key factors affecting physiological durability of a soda-lime silicate bulk glass, A-glass, E-glass, Lead-glass, Cemfil and alumino-silicate ceramic fibres. The aims were to develop a) the current theoretical …
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MULTIPLE SCATTERING FROM A RANDOM AND INHOMOGENEOUS SLAB
… place inside the medium and is solved by a novel iterative approach. The order-of-scattering reflection functions method presented here and the coupled integral equation approach of the Bremmer solutions for the internal fluxes are set in a unified frame. The solutions of the Riccati equation are …
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