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 30 for “"MATRIX METHODS"”.
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Advanced response matrix methods for full core analysis
… full reactor cores with high fidelity transport methods is a difficult task, requiring the largest computers available today. This thesis presents work on an alternative approach using the eigenvalue response matrix method (ERMM). The basic idea of ERMM is to decompose a reactor spatially into …
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Homogenization of BWR assemblies by response matrix methods
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1981.
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Application of response matrix methods to PWR analysis
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1982.
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An application of design structure matrix methods to explore process improvements in aircraft fight line operations
… flight line was analyzed using Design Structure Matrix (DSM) methods. Mapping the two DSMs together into a larger multi-domain matrix (MDM) provided insight to the ways information is transferred, and clarified ways to streamline available information to the various stakeholders, while reducing …
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Aspects of vibration in bridge-girders
A theoretical comparative study of methods for determining natural frequencies of vibration and their corresponding mode shapes is presented for the case of cantilevers, simply supported and continuous beam structures. Different methods are used, such as classical, energy and matrix methods. …
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Homomorphisms between bubble algebra modules
… approach to the general case involving matrix methods.
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Statistical mechanical models for image processing
… problem is solved analytically using transfer-matrix methods. A Monte Carlo simulation restores the distorted image utilizing the statistical information about the source and the channel. Beyond its inherent practical usefulness the image restoration problem illustrates directly basic concepts …
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Approximate inverse scattering using pseudodifferential scaling
… inversion of the normal operator using direct matrix methods is computationally infeasible. Approximate inverses estimate the solution of the inverse problem or precondition iterative methods. Application of the normal operator requires an expensive solution of large scale PDE problems. …
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A theoretical analysis of the temperature response in a bimetallic, composite geometry, nuclear reactor pressure vessel undergoing a loss-of-coolant accident
… equations which are solved exactly in time by matrix methods instead of the usual time stepping, numerical procedures. The merits and demerits of matrix methods used in conjunction with each numerical technique for handling the spatial variables of the problem are enumerated. The analysis …
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Estabilidade das grelhas de convés de navios
… of deck grillages. After a review on existing methods anc. accurate theory, including torsional and shear effects, is developpedfor the response of a one dimensional structure element ·subjected to compressive forces, intending its use on matrix methods for structural engineering. With the …
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Structural modification utilizing beam elements
… Modification Method (DMSM) and the Transfer-Matrix Method to institute general beam modifications. The DMSM method is employed to implement the beamtype modification, while the transfer-matrix method is used to formulate the modification element. The use of transfer-matrix methods provides …
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Numerical Treatment of Schrödinger’s Equation for One-Particle and Two-Particle Systems Using Matrix Method
… developed and tested here using linear algebraic matrix methods to enable precise solutions.</p> <p>The finite-difference technique is used to cast the Time-Independent Schrödinger equation (TISE) in the form of a matrix eigenvalue problem. The numerical singularity in the Coulomb potential term …
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Numerical solution of fractional partial differential equations by spectral methods
… modeling of physical models by using spectral methods. In the last few decades, spectral methods have been developed for the solution of time and space dimensional FPDEs. There are different types of spectral methods such as collocation methods, Tau methods and Galerkin methods. This research …
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Study of the effect of sensor position on the forced response characteristics of rotors with active magnetic bearings
… presents a modification of existing transfer matrix methods for rotor analysis, to predict the response of rotor systems with active magnetic bearings. The position of the magnetic bearing sensors is taken into account and the effect of changing sensor position on the vibrational …
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Burrows and bedding : site taphonomy and spatial archeaology at Tortoise cave
… the use of context sheets and a stratigraphic matrix. Methods often used elsewhere but very common in South Africa, It was felt that archaeologists had been ignoring the vital difference between stratigraphy that is observed and excavated and the actual sequence and circumstances of deposition. …
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Crashworthiness optimization of ultralight metal structures
… the use of the dynamic stiffness and transfer matrix methods in marine riser vibration. Marine risers possess a predominant chain topology. The transfer matrix method is appropriate for the analysis of such structures. Wave transmission and reflection matrices are formulated in terms of …
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Advanced analysis of rotor-bearing systems for stability and response
… use the conventional and proven transfer matrix methods to solve the dynamics. However, the recent advances in computer technology and the distinct advantages of the finite element method make it an attractive tool to model complex rotor bearing systems. This research has developed a …
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Molecular investigations of subgroup I geminiviruses
… Eleusine spp. from South Africa). The following methods were used: analysis of restriction fragment length polymorphisms (RFLPs) between viral genomes in individual infected plants; DNA cross-hybridization between virus isolates; restriction endonuclease mapping of whole virus genomes; and …
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A Species Independent Universal Bio-detection Microarray for Pathogen Forensics
… known phylogenomic relationships. Classification methods such as hierarchical clustering, Pearson's correlation matrix, principal component analysis and curve fitting regression methods were tested for pathogen specific use cases. Hierarchical clustering and Pearson's correlation matrix methods …
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