Now showing items 558-577 of 597

• #### The wavelet transforms and time-scale analysis of signals ﻿

(1990)
Orthonormal wavelet bases provide an alternative technique for the analysis of non-stationary signals. Unlike the Gabor representation, the basis functions in the wavelet representation all have the same band width on a ...
• #### Theoretical and experimental investigation of the polarization switching process of ferroelectric thin films ﻿

(2002)
Polarization switching of ferroelectric thin films is essential to the operation of ferroelectric memories. The switching process involves domain formation and development. To understand the process, domain nucleation close ...
• #### Theoretical Investigation of Material Properties Affecting Coherent Anti-Stokes Raman Scattering Microendoscopy ﻿

(2013-07-02)
Physicians in clinical settings are constantly seeking label-free imaging modalities with superior sensitivity and resolution. Coherent anti-Stokes Raman scattering (CARS) has demonstrated great clinical potential, but ...
• #### THEORY OF CONDUCTION IN POLYCRYSTALLINE SILICON (POLYSILICON) ﻿

(1984)
A comprehensive theory of conduction in polycrystalline silicon is presented. The present approach fundamentally differs from previous theories in its treatment of the grain boundary. This theory regards the grain boundary ...
• #### Three-dimensional geometric coding using mixture models and the estimation quantization algorithm ﻿

(2003)
3D surfaces are used in applications such as animations, 3D object modeling and visualization. The geometries of such surfaces are often approximated using polygonal meshes. This thesis aims to compress 3D geometry meshes ...
• #### TIME-FREQUENCY SIGNAL PROCESSING ALGORITHMS: ANALYSIS AND SYNTHESIS USING WIGNER DISTRIBUTIONS ﻿

(1984)
A tutorial review of several mixed time-frequency representations of signals and systems is presented. Emphasis is placed on the background, extensions, inter-relationships, and applications of the Gabor logon, the Short-time ...
• #### Time-selective signaling and reception for communication over multipath fading channels ﻿

(1998)
The mobile wireless channel offers inherent diversity by virtue of multipath and Doppler shifts. Multipath diversity is exploited via spread-spectrum signaling employed in code division multiple access (CDMA) systems. ...
• #### Topics on LASSO and Approximate Message Passing ﻿

(2014-04-25)
This thesis studies the performance of the LASSO (also known as basis pursuit denoising) for recovering sparse signals from undersampled, randomized, noisy measurements. We consider the recovery of the signal x_o \in ...
• #### Toward a theory of information processing ﻿

(2000)
Information processing is performed when a system preserves some aspects of the information encoded by its input while it suppresses others. To describe a system's information processing capability, input and output need ...
• #### Transceiver design for efficient channel estimation in MIMO OFDM systems ﻿

(2006)
In this thesis, we first compare the least squares (LS) channel estimation performance in terms of mean squared error (MSE) with the perfect knowledge of channel length L versus the estimation without the knowledge of L. ...
• #### Transform-domain modeling of nonGaussian and 1/f processes ﻿

(1999)
Classical Gaussian, Markov, and Poisson models have played a vital role in the remarkable success of statistical signal processing. However, a host of signals---images, network traffic, financial times series, seismic ...
• #### Transmitter diversity and coding schemes ﻿

(2000)
We analyze wireless communication systems employing multiple-transmit multiple-receive antennas in this thesis. Space-time codes have been proposed in the literature as an efficient means of coding over multiple transmit ...
• #### Transverse thermal conductivity of thin dielectric films ﻿

(1998)
Earlier work revealed that the transverse thermal conductivity of thin films of amorphous SiO$\sb2$ and $\rm Si\sb3N\sb4$ deposited on monocrystalline silicon decreased substantially when the film thickness was less than ...

(1977)

(1979)
• #### Ultra-sensitive tunable laser absorption spectroscopy: Applications and performance assessment ﻿

(2005)
Methodologies using tunable laser absorption spectroscopy (TLAS) for quantifying carbon dioxide stable isotopes (13/12CO 2), measuring atmospheric formaldehyde (CH2O), and analyzing exhaled carbonyl sulfide (COS) in human ...
• #### Ultrafast and magneto-optical spectroscopy of excitons and phonons in carbon nanotubes ﻿

(2010)
Understanding how electrons and phonons relax in energy and momentum is one of the current goals in carbon nanotube spectroscopy as well as an important step toward developing novel electronic and optoelectronic devices ...
• #### Ultrafast and magneto-optical spectroscopy of semiconductor heterostructures ﻿

(2012)
This thesis presents spectroscopic results using semiconductor heterostructures important for both applied and fundamental physics. First, we studied short-period superlattices of InAs and GaSb that suggest a promising ...
• #### Ultrafast magneto-optical spectroscopy of (III,manganese)V ferromagnetic semiconductors ﻿

(2005)
This thesis describes magneto-optical processes in ferromagnetic (III,Mn)V semiconductors and their heterostructures induced by femtosecond laser pulses. Two-color ultrafast magneto-optical spectroscopy has been developed, ...
• #### Universal classification for wireless CDMA communications ﻿

(1998)
Since channel characteristics of a practical code division multiple access (CDMA) system are usually unknown and difficult to model accurately, we focus on the design of non-parametric adaptive receivers with two general ...