Now showing items 1351-1370 of 1784

• #### A Radially-Gaussian, Signal-Dependent Time-Frequency Representation ﻿

(1991-04-01)
An optimization formulation for designing signal-dependent kernels that are based on radially Gaussian functions is presented. The method is based on optimality criteria and is not ad hoc. The procedure is automatic. The ...
• #### Random Filters for Compressive Sampling and Reconstruction ﻿

(2006-05-01)
We propose and study a new technique for efficiently acquiring and reconstructing signals based on convolution with a fixed FIR filter having random taps. The method is designed for sparse and compressible signals, i.e., ...
• #### Random observations on random observations: Sparse signal acquisition and processing ﻿

(2010)
In recent years, signal processing has come under mounting pressure to accommodate the increasingly high-dimensional raw data generated by modern sensing systems. Despite extraordinary advances in computational power, ...
• #### Random Projections of Signal Manifolds ﻿

(2006-05-01)
Random projections have recently found a surprising niche in signal processing. The key revelation is that the relevant structure in a signal can be preserved when that signal is projected onto a small number of random ...
• #### Random Projections of Smooth Manifolds ﻿

(2006-10-01)
Many types of data and information can be described by concise models that suggest each data vector (or signal) actually has â few degrees of freedomâ relative to its size N. This is the motivation for a variety of ...
• #### Randomized Parallel Prefetching and Buffer Management ﻿

(1999)
We show that deterministic algorithms using bounded lookahead cannot fully exploit the potential of a parallel I/O system. Randomization can be used to significantly improve the performance of parallel prefetching and ...
• #### Rapid and Continuous Modulation of Hippocampal Network State during Exploration of New Places ﻿

(2013-09)
Hippocampal information processing is often described as two-state, with a place cell state during movement and a reactivation state during stillness. Relatively little is known about how the network transitions between ...
• #### Rapid fabrication of miniature lens arrays by four-axis single point diamond machining ﻿

(2013)
A novel method for fabricating lens arrays and other nonrotationally symmetric free-form optics is presented. This is a diamond machining technique using 4 controlled axes of motion – X, Y, Z, and C. As in 3-axis diamond ...
• #### Rapid Industrial Prototyping and Scheduling of 3G/4G SoC Architectures with HLS Methodology ﻿

(2005-12-01)
In this paper, we present a Catapult C/C++ based methodology that integrates key technologies for high-level VLSI modelling of 3G/4G wireless systems to enable extensive time/area tradeoff study. A Catapult C/C++ based ...
• #### Rapid Industrial Prototyping and SoC Design of 3G/4G Wireless Systems Using an HLS Methodology ﻿

(2006-07-01)
Many very-high-complexity signal processing algorithms are required in future wireless systems, giving tremendous challenges to real-time implementations. In this paper, we present our industrial rapid prototyping experiences ...
• #### A Rapid Prototyping Environment for Wireless Communication Embedded Systems ﻿

(2003-05-01)
This paper introduces a rapid prototyping methodology which overcomes important barriers in the design and implementation of digital signal processing (DSP) algorithms and systems on embedded hardware platforms, such as ...
• #### Rapid Prototyping of Wireless Communications Systems ﻿

(2002-05-20)
This thesis introduces rapid prototyping methodology which overcomes important barriers in the design and implementation of digital signal processing (DSP) algorithms and systems on embedded hardware platforms, such as ...
• #### Rapid prototyping of wireless communications systems ﻿

(2002)
This thesis introduces rapid prototyping methodology which overcomes important barriers in the design and implementation of digital signal processing (DSP) algorithms and systems on embedded hardware platforms, such as ...
• #### Rapid Scheduling of Efficient FPGA Architectures for Next-Generation HSDPA Wireless System Using Precision C Synthesizer ﻿

(2003-06-20)
In this paper, an efficient design flow integrating Mentor Graphics Precesion C and HDL designer is derived. In this hybrid prototyping environment, efficient FPGA architec-tures are scheduled rapidly with specific hardware ...
• #### Rapid Stereomicroscopic Imaging of HER2 Overexpression in Ex Vivo Breast Tissue Using Topically Applied Silica-Based Gold Nanoshells ﻿

(2012)
Tumor margin detection for patients undergoing breast conservation surgery primarily occurs postoperatively. Previously, we demonstrated that gold nanoshells rapidly enhance contrast of HER2 overexpression in ex vivo tissue ...
• #### Rare gas alkali ionic excimers ﻿

(1989)
The rare gas alkali ionic excimers (RgA)$\sp+$ are investigated as possible VUV laser sources. The detection of emission from (XeRb)$\sp+$ at 165 nm using laser produced plasma soft x-ray excitation is reported. In addition ...
• #### Rate-constrained Relaying: A Model for Cooperation with Limited Relay Resources ﻿

(2005-06-01)
In this paper, the impact of limited resources on achievable rates in relay channels is investigated. Resource limitation is modeled as a rate constraint, Rbar, which constrains the rate at which a relay can reliably ...
• #### Rate-dependent Ca2+ signalling underlying the force-frequency response in rat ventricular myocytes: A coupled electromechanical modeling study ﻿

(2013-09-10)
Rate-dependent effects on the Ca2+ sub-system in a rat ventricular myocyte are investigated. Here, we employ a deterministic mathematical model describing various Ca2+ signalling pathways under voltage clamp (VC) conditions, ...
• #### Rate-Distortion Optimized Image Compression using Wedgelets ﻿

(2002-06-01)
Most wavelet-based image coders fail to model the joint coherent behavior of wavelet coefficients near edges. Wedgelets offer a convenient parameterization for the edges in an image, but they have yet to yield a viable ...
• #### Rate-distortion optimized packet scheduling for video streaming ﻿

(2006)
Internet video streaming places new demands on source coding and network transport algorithms. The challenge is to deliver compressed video packets before their play-out deadline, despite of varying throughput, packet ...