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 100 for “"phase difference"”.
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Phase difference and tensor factorization models for audio source separation
Made available in DSpace on 2017-03-01T15:46:01Z (GMT). No. of bitstreams: 2 TRAA-DISSERTATION-2016.pdf: 12461339 bytes, checksum: aeab068ca641be012f3b6c8b1f19d354 (MD5) LICENSE.txt: 4210 bytes, checksum: 63ac2ac06dfd739a5099ea28ac00e136 (MD5) Previous issue date: 2016-10-10
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Basic module for an integrated optical phase difference measurement and correction system
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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A new model for electric force microscopy and its application for electrostatically generated phase difference in tapping mode AFM
… microscopy (EFM) and electrostatically generated phase difference in tapping mode AFM (EPTA) measurements. Simulations show that the harmonic force balance approach matches and explains EFM and EPTA experimental results well. Simulations also show that the model depended on both geometric and …
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Investigating a countercyclical price level with procyclical inflation
… simulated time series of the price level out of phase with the output time series. This resulting phase difference can then be adapted to an empirical time frame as a number of quarters that the price level leads output. This process involves calibrating the representative output cycle length in …
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Developing and testing of a prototype electro-optical phase encoded position transducer
… a proposed idea for a prototype electro-optical phase encoded position transducer was conducted. The intensity of two IR LED beams were modulated sinusoidally at frequency omega, with a 90 degree temporal phase difference. They further modulated by a pair of sinusoidal optical encoding masks with …
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Frequency synthesis using phase-controlled oscillator techniques
The behavior of the phase-controlled oscillator has been the subject of extensive analysis for many years. However, the vast majority of the literature assumes that the phase comparator, or error detector, of the system produces an output proportional to the sine of the phase difference. In recent …
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Quantum Dynamics of Small Josephson Junctions: An Application to Superconductivity in Granular Films
… on the quantum mechanical nature of the phase difference (phi) between the superconductors.
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Evanescently Coupled Vertical Cavity Laser Arrays
… coupled VCSEL arrays has resulted in out-of-phase arrays or more desirable in-phase arrays, which suffer from complex fabrication processes. This work examines two types of evanescently coupled VCSEL arrays: photonic crystal (PhC) and implant-defined arrays. Both array types exhibit …
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Digital Holographic Micro-Interferometery for the Measurement of the Refractive Index of Biological Cells
… Moreover, in order to extract the interference phase from the recorded holograms, a program that applies Fourier fringe analysis to extract wrapped phase image and quality-guided phase unwrapping program were implemented in LabVIEW®. From the three different interference phase distributions of …
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ΣΕΙΣΜΙΚΗ ΣΥΜΠΕΡΙΦΟΡΑ ΜΟΝΟΒΑΘΜΙΩΝ ΣΥΣΤΗΜΑΤΩΝ ΣΕ ΕΠΑΦΗ
… (SDOF) SYSTEMS SUBJECTED TO A BASE MOTION. THE PHASE DIFFERENCE (DUE TO TRAVELLING SEISMIC WAVES) IN THE STARTING TIMES OF EXCITATION OF ADJACENT STRUCTURES IS TAKEN INTO ACCOUNT AS WELL AS THE CHANGES ON RESPONSE QUANTITIES DUE TO POUNDING. A PARAMETRIC STUDY IS CARRIED OUT TO INVESTIGATE THE …
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An electrophysiological study of chromatic processing in the human visual system. Using visual evoked potentials and electroretinograms to study cortical and retinal contributions to human trichromatic vision.
… ERGs, the L:M ratio was close to unity and L/M phase difference was close to 180°. For high temporal frequency ERGs, the L:M ratio was more than unity and L/M phase difference was close to 90°. In addition to this, the variation in L:M ratio across the retinal eccentricity was also examined. …
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Non-Sinusoidal Current -Phase Relations in Superconductor-Ferromagnet-Superconductor Josephson Junctions
We have directly measured the current-phase relation (CPR) of a superconductor-ferromagnet-superconductor (SFS) Josephson junction, and determined that it contains a positive second-harmonic term proportional to sin(2&phis;). The second-harmonic term becomes dominant near Tpi, the temperature at …
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Measurement of the Strong Phase Delta (Kaon Pion) Through the Decay of Quantum-Correlated Neutral D-Anti-D Meson Pairs
… at the psi(3770) resonance to measure the strong phase difference deltaKpi between D0 → K+pi- and D 0 → K-pi+ decays. Using 818 pb-1 of e+e- collisions collected by the CLEO-c detector, we report a measurement of deltaKpi extracted from a Dalitz plot fit of KSpi+pi- in the joint decay …
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Beta-gamma-gamma correlation in Mn[superscript 56] : a test of time reversal invariance
… in two 0 transitions of Mn ,we conclude that the phase difference + -2 + between Ml and E2 reduced matrix elements is {equation} for the 1.81 and 2.12 MeV transitions respectively.
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Enhancing Signal Coverage for UHF RFID Systems
… antennas’ variable AR, predicting a 13% coverage difference between the AR-optimised antenna and its AR-degraded version, matching the measured value at 10%. Due to the higher power requirement of sensor tags over conventional passive tags, a fast and effective beam-forming algorithm is desirable. …
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The Flying Fish, an untethered oceanographic sensor platform with acoustic homing capability
… a monochromatic acoustic beacon at the surface. Phase difference measurements made on two orthogonal axes are used to deduce the relative bearing to the beacon. An autopilot uses this information to actuate control surfaces and correct vehicle attitude. This thesis describes the oceanographic …
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Control of a Nonlinear Mach-Zehnder Interferometer for Regeneration Using Digital Signal Processing
… signals and limit the transmission reach. Phase modulated signals are susceptible to both amplitude and phase noises. Optical regenerators based on nonlinear Mach Zehnder interferometers (NMZIs) are able to suppress them both. To use a NMZI as a regenerator, the frequency of the pump signal …
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Photoacoustic imaging system for fluid flow visualization and biological tissues characterization
… of tissues optical absorption via the measured phase value (Ф). This research began with the validation of the functionality of the developed system using biological system comprised of a mock circulatory system overlaid by different parts of poultry namely fat, liver and muscle of different …
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Multiuser Detection for Pulse Amplitude Modulated Signals
… of the two users’ constellations, and how the phase difference between the two users can greatly vary the shape of the performance curves. The complexity of Optimum MUD motivates our investigation of Successive Interference Cancellation (SIC), a reduced complexity MUD algorithm. For some cases, …
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Designing a Multichannel Sense-and-Avoid Radar for Small UASs
… angles by exploiting the received signal's phase difference at each individual antenna.
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