Now showing items 463-482 of 1489

  • A Fast and Efficient Sift Detector Using The Mobile GPU 

    Rister, Blaine; Wang, Guohui; Wu, Michael; Cavallaro, Joseph R. (2013-06)
    Emerging mobile applications, such as augmented reality, demand robust feature detection at high frame rates. We present an implementation of the popular Scale-Invariant Feature Transform (SIFT) feature detection algorithm ...
  • Fast computation of the sliding-window Radon transform with application to attribute extraction 

    Steeghs, Philippe (1999-01-15)
    We have developed a fast and robust algorithm for the extraction of 3-D seismic attributes. The algorithm is based on the recursive computation of the 3-D sliding-window Radon transform. Considerable gain in computational ...
  • Fast Fourier transforms for constrained data 

    Sorensen, Henrik Vittrup (1988)
    This thesis develops several new algorithms for computing the discrete Fourier transform (DFT). The work describes algorithms for which a set of constraints on the input or the output allow the DFT to be computed more ...
  • Fast Multi-user Detector for a Time-varying CDMA System 

    Das, Suman; Cavallaro, Joseph R.; Aazhang, Behnaam (1997-07-01)
    This paper investigates methods to reduce the amount of computation needed to detect information bits using a linear detector for a CDMA system. We show windowing technique coupled with pipelining can reduce the amount of ...
  • Fast, Exact Synthesis of Gaussian and nonGaussian Long-Range-Dependent Processes 

    Baraniuk, Richard; Crouse, Matthew (2009-04-15)
    1/f noise and statistically self-similar random processes such as fractional Brownian motion (fBm) and fractional Gaussian noise (fGn) are fundamental models for a host of real-world phenomena, from network traffic to ...
  • Fast, Exact Synthesis of Gaussian and nonGaussian Long-Range-Dependent Processes 

    Crouse, Matthew; Baraniuk, Richard G. (1999-01-15)
    1/<i>f</i> noise and statistically self-similar processes such as fractional Brownian motion (fBm) are vital for modeling numerous real-world phenomena, from network traffic to DNA to the stock market. Although several ...
  • Faster Sequential Universal Coding via Block Partitioning 

    Baron, Dror; Baraniuk, Richard G. (2006-04-01)
    Rissanen provided a sequential universal coding algorithm based on a block partitioning scheme, where the source model is estimated at the beginning of each block. This approach asymptotically approaches the entropy at the ...

  • Fault Detection and Fault Tolerance in Robotics 

    Visinsky, Monica L.; Walker, Ian D.; Cavallaro, Joseph R. (1991-07-01)
    Robots are used in inaccessible or hazardous environments in order to alleviate some of the time, cost and risk involved in preparing men to endure these conditions. In order to perform their expected tasks, the robots ...
  • Fault Detection and Fault Tolerance Methods for Robotics 

    Visinsky, Monica L. (1991-12-20)
    Fault tolerance is increasingly important in modern autonomous or industrial robots. The ability to detect and tolerate failures allows robots to effectively cope with internal failures and continue performing designated ...
  • Fault Residual Generation via Nonlinear Analytical Redundancy 

    Leuschen, Martin L.; Walker, Ian D.; Cavallaro, Joseph R. (2005-05-01)
    Fault detection is critical in many applications, and analytical redundancy (AR) has been the key underlying tool for many approaches to fault detection. However, the conventional AR approach is formally limited to linear ...
  • Fault Tolerant Algorithms and Architectures for Robotics 

    Hamilton, D. L.; Visinsky, Monica L.; Bennett, J. K.; Cavallaro, Joseph R.; Walker, Ian D. (1994-04-01)
    As robot tasks in space, nuclear, and medical environments become more widespread, the issues of reliability and safety for robots are becoming more critical. Attempts to address these issues have resulted in a a recent ...
  • Fault-Tolerant VLSI Processor Array for the SVD 

    Cavallaro, Joseph R.; Near, Christopher D.; Uyar, M. Umit (1989-10-01)
    Dynamic reconfiguration techniques are presented for a two-dimensional systolic array for the SVD of a matrix. Extra computation time is not required, since idle time inherent in the array is exploited. The scheme does not ...
  • Feature Extraction Techniques for Classification and Identification of Spectral Signatures 

    de Figueiredo, Rui J.P. (1976-04-20)
    Some of the results obtained at Rice University on the extraction of features from spectral signatures for the purpose of classifying and identifying these signatures are described.
  • Feedback gain in Multiple Antenna Systems 

    Bhashyam, Srikrishna; Sabharwal, Ashutosh; Aazhang, Behnaam (2002-05-20)
    Multiple antenna transmission and reception have been shown to significantly increase the achievable data rates of wireless systems. However, most of the existing analysis assumes perfect or no channel information at the ...
  • Feedback in multiple antenna systems: Bounds, design criterion and construction 

    Mukkavilli, Krishna Kiran (2004)
    In this thesis, we study wireless communication systems equipped with multiple antennas at the transmitter and the receiver. In particular, we investigate the design and performance analysis of transmission schemes when ...
  • Fermi-edge superfluorescence from a quantum-degenerate electron-hole gas 

    Kim, Ji-Hee; Noe, G. Timothy II; McGill, Stephen A.; Wang, Yongrui; Wojcik, Aleksander K.; Belyanin, Alexey A.; Kono, Junichiro (2013)
    Nonequilibrium can be a source of order. This rather counterintuitive statement has been proven to be true through a variety of fluctuation-driven, self-organization behaviors exhibited by out-of-equilibrium, many-body ...
  • FFT-Accelerated Iterative MIMO Chip Equalizer Architecture For CDMA Downlink 

    Guo, Yuanbin; McCain, Dennis; Cavallaro, Joseph R. (2005-03-01)
    In this paper, we present a novel FFT-accelerated iterative Linear MMSE chip equalizer in the MIMO CDMA downlink receiver. The reversed form time-domain matrix multiplication in the Conjugate Gradient iteration is accelerated ...
  • Finite Backlog Effects on Downlink Scheduling 

    Ahmed, Nasir; Khojastepour, Mohammad; Sabharwal, Ashutosh; Aazhang, Behnaam (2003-11-20)
    In a multi-user downlink system, the use of channel estimates in the scheduling process can significantly improve the spectral efficiency. Recent work has shown that from a sum rate capacity standpoint, and assuming infinite ...
  • Finite element analysis of the use of temperature feedback for control of laser coagulation in biological tissue 

    Glenn, Tami Neal (1994)
    Study of thermal damage processes in laser irradiated tissue can provide further insight into the determination of optimal coagulation procedures. Arrhenius rate thermal damage processes are sensitive to tissue damage ...