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 11 of 11 for “"Field Computation"”.
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Chebyshev spectral methods for potential field computation
… analytic formulation for the gravitational field of a homogeneous, polyhedral body to the potential. Numerical results show that the accuracy of the cell-average discretization is better than that of the point injection discretization. The multi-domain solution is the best. We apply the …
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Fast Polarizable Force Field Computation in Biomolecular Simulations
Polarizable force fields are considered to be the single most significant development in the next-generation force fields used in biomolecular simulations. The self-consistent computation of induced atomic dipoles in a polarizable force field is expensive due to the cost of solving a large dense …
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Electromagnetic field computation and photonic band gap devices
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Efficient Techniques for Near-Field Computation and Subreflector Analysis
… In the first part a new technique for near-field computation is proposed. Integral representations of the radiating near field are obtained by making Fresnel approximations in the phase, magnitude and direction of the exact field expression. The analysis is general in the sense that neither …
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Quantifying Coordinate Uncertainty Fields in Coupled Spatial Measurement systems
… presents methods for quantifying the uncertainty fields associated with coupled spatial measurement systems. The significant new developments and refinements presented in this dissertation are summarized as follows: 1) A geometrical representation of coordinate uncertainty fields. 2) An …
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ΕΠΙΛΥΣΗ ΤΟΥ ΜΗ ΓΡΑΜΜΙΚΟΥ ΠΡΟΒΛΗΜΑΤΟΣ ΤΩΝ ΠΟΛΛΩΝ ΡΕΥΜΑΤΟΦΟΡΩΝ ΑΓΩΓΩΝ ΜΕ ΤΗ ΜΕΘΟΔΟ ΠΕΠΕΡΑΣΜΕΝΩΝ ΣΤΟΙΧΕΙΩΝ
… PROBLEM. THE METHOD IS USED FOR THE FIELD COMPUTATION IN A 3-PHASE GAS INSULATED CABLE. THE PHASE CONDUCTORS CARRY SINUSOIDAL CURRENTS IN A STEADY-STATE AND BALANCED CONDITION. BOTH SYMMETRICAL AND NON-SYMMETRICAL CONDUCTOR ARRANGEMENTS ARE EXAMINED, TAKING INTO ACCOUNT THE REAL …
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Computational and experimental study of trailing vortices
A coordinated computational undertaken to investigate the and experimental study was behavior of the vortices trailing from low aspect ratio lifting surfaces. Vortex formation in the near-wake was measured in a wind tunnel with yaw-head and hot-wire probes at three different Reynolds numbers, the …
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Computational tools for enabling longitudinal skin image analysis
We present a set of computational tools that enable quantitative analysis of longitudinally acquired skin images: the assessment and characterization of the evolution of skin features over time. A framework for time-lapsed skin imaging is proposed. A nonrigid registration algorithm based on …
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Actively shielded air-core superconducting machines: optimization and design considerations
… of magnetic materials and containment of fields within the machine, all while achieving the necessary cooling. This thesis explores the use of actively shielded air-core superconducting electric machines to address these challenges. A design concept is presented employing mature and …
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Selected optimization procedures for CFD-based shape design involving shock waves or computational noise
… with designing aerodynamic shapes using computational fluid dynamics (CFD) codes. The investigation focuses in the transonic flow regime where shock waves may have an adverse effect on the convergence of the optimization process. In particular, the interaction of the flow discontinuity …
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Computer aided design and construction of a multi-point positioning actuator system
… FEM package has been developed for the computation of transient electromagnetic field. It can deal with various forms of power supply from standard current excitation to voltage excitation by coupling an external circuit with the electromagnetic field equations. A decomposed magnetic …