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 1960 for “"Harmonic"”.
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EXTERIOR REGULARIZED HARMONIC AND HARMONIC FUNCTIONS
This thesis mainly studies harmonic functions on exterior regions, having compact, Lipschitz boundaries, in our new finite energy function space, via the sequence of exterior harmonic Steklov eigenvalues and associated eigenfunctions. The new space is strictly larger than the standard …
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Harmonic Hypervariables
Made available in DSpace on 2014-12-05T21:50:11Z (GMT). No. of bitstreams: 1 5805455.pdf: 2394220 bytes, checksum: b44cb1fc0a65544894c1122559227614 (MD5) Previous issue date: 1958
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Harmonic Sputtering Theory
<p>ABSTRACT</p> <p>HARMONIC SPUTTERING THEORY</p> <p>By</p> <p>ZHU LIN ZHANG</p> <p>February 2010</p> <p>Advisor: Dr. Karur R. Padmanabhan</p> <p>Major: Physics</p> <p>Degree: Doctor of Philosophy</p> <p>Based on the standard Botzmann equation in Classical Statistics Mechanics, we have derived a …
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SUPPRESSION OF HARMONIC TORQUE AND HARMONIC CURRENT IN PERMANENT MAGNET SYNCHRONOUS MOTOR
In this dissertation harmonic current, harmonic torque originated at the load and harmonic torque originated at the motor, where modeled and treated via closed loop control. The dissertation propose a remedy for cancelling harmonic current by placing the proposed adaptive feedforward controller …
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Generalized Selective Harmonic Control
In the final section of the dissertation, performance aspects of GSHC are examined within the limitations of the current ability to obtain solutions. Relative performance of an available set of solutions is compared, illustrating the importance of selecting a particular solution over another. …
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Submillimeter wave harmonic gyrotron
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1989.
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Harmonic Reduction IN a Single-Switch Three-Phase Boost Rectifier With Harmonic-Injected PWM
… switching frequency with the sixth-order harmonic injection PWM concept is established, and a sixth-order harmonic injection technique is developed for the harmonic reduction of a single-switch three-phase boost rectifier. The approach employs a constant duty cycle with sixth-order …
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Harmonic maps of trivalent trees
This thesis is a study of harmonic maps of trivalent trees into Euclidean space. The existence of such maps is established, and uniqueness is shown to hold up to a certain isotopy condition. Moreover, within its particular isotopy class, each harmonic map is shown to be a local minimum for the …
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Dynamics of disordered harmonic lattices
… properties, and dynamical properties of harmonic systems with varying degrees of substitutional disorder have been made. The effects on observable properties of random mixtures of two or more species of atoms with differing masses and differing couplings to nearest-and …
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Sparse technology in weighted harmonic analysis
This dissertation is the union of two major results that we discovered during my graduate time. Both of the results involve what are called sparse families of cubes. There will also be some partial results included though they were not submitted to any peer-reviewed journal. In this work, we first …
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Digital Harmonic-Cancelling Sinusoidal Signal Synthesis
… problem. The subject of this thesis is digital harmonic-cancelling sine-wave synthesizers (DHSSs). The first publication of a DHSS was in 1969. However, due to the overshadowing popularity of direct digital frequency synthesizers (DDFSs), the development of DHSSs had been stalled until a revival …
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Harmonic analysis of transformer excitation currents
… component and a series of parallel-connected harmonic current phasors. The single-phase transformer model is extended to represent three-phase transformers under various connections, including Y/Y, Y/{dollar}\Delta{dollar}, {dollar}\Delta{dollar}/Y, and …
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Modelling of capillary high harmonic generation
High harmonic generation (HHG) is now an accepted method for laboratory based generation of XUV and soft x-ray light. HHG produces pulses that are highly coherent, with a pulse length in the femtosecond or attosecond timescales. To predict the XUV output from an HHG experiment, both the emission …
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Passive harmonic generation at spring contacts
<p>"In the first paper, the RF passive harmonic generation phenomenon on the spring contact is studied. A spring contact harmonic generation measurement system is developed. The factors that may have an impact on the spring contact harmonic generation, such as contact material, contact force, and …
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Harmonic Acoustics for Single Cell Manipulation
<p>Technologies that can manipulate single particles and cells in a high precision, high throughput and contact-free manner have long been motivated by applications in materials science, physics, medicine, and the life sciences. However, current single cell manipulation tools, such as atomic force …
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Third harmonic generation microscopy and applications
Includes bibliographical references (pages 40-41).
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Ideal Boundary Theory for Harmonic Spaces
Made available in DSpace on 2014-12-11T18:23:58Z (GMT). No. of bitstreams: 1 7317462.pdf: 3481878 bytes, checksum: ce580bcc42cbca7d83aeba1346499c8b (MD5) Previous issue date: 1972
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Harmonic Analysis on Algebraically Irreducible Semigroups
Made available in DSpace on 2014-12-09T22:17:45Z (GMT). No. of bitstreams: 1 6901297.pdf: 1562000 bytes, checksum: 752b9438425719a19712555dd78ce577 (MD5) Previous issue date: 1967
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