In this article, the finite-time stabilization problem is solved for a linear time-varying system with unknown control direction by exploiting modified version of classical extremum-seeking algorithm. We propose to use suitable oscillatory input modify dynamics, at least in an average sense, so...

In the context of Radioastronomic applications where Analog Radio-over-Fiber technology is used for antenna downlink, detrimental nonlinearity effects arise because interference between forward signal generated by laser and Rayleigh backscattered one which re-forwarded itself toward photodetector. The adoption so called <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://...

1 flicker rates, but when the frequency is raised to 5-20 Hz, color flicker fusion occurs, where the e s flicker is seen as a variation of intensity only. Th ubject can eliminate all sensation of flicker by h p balancing the intensities of the two lights (at whic oint the lights are said to be equiluminant). When r c the intensities are not balanced, the luminance flicke an be seen at frequenci...

This paper presents a DCO dithering technique which employs a finer fractional gain control to suppress nonlinear effect of a bang-bang digital PLL (BB-DPLL).

We present some novel tools for the analysis of bluenoise binary patterns. Unlike most of the existing methods that evaluate the frequency content of a given mask or its lower order statistics, our new metrics characterize the morphological content of a mask that is quantified using simple one-pass filtering. An analytical filter expression is given. As a result, one can balance the structural ...

Rui Liu (top row, left) research assistant; Brian G. Thomas (top row, right), C.J. Gauthier Professor of Mechanical Engineering (bgthomas@illinois. edu), Department of Mechanical Science and Engineering, University of Illinois at UrbanaChampaign, Urbana, Ill., USA; Love Kalra (bottom row, left), senior engineer (love.kalra@ arcelormittal.com), ArcelorMittal No. 3 Steel Producing, East Chicago, ...

Nowadays, most cellular phones are used beyond voice communication. Although the processing power of cellular phones is sufficient for most data applications, it is difficult to play video and audio contents in software because of their computational complexity and lack of basic tools for multimedia processing, so software-based multimedia processing on cellular phones is a challenging issue. S...

0030-4018/$ see front matter Crown Copyright 2 doi:10.1016/j.optcom.2010.01.042 * Corresponding author. E-mail address: [email protected] (J. B Double-modulated terahertz differential time-domain spectroscopy (double-modulated THz-DTDS), is a technique that is based on dithering the sample under test. In this paper, we report a measurement technique based on mounting the sample on a ...

We propose strategies for reducing the operations required by a high-quality halftoning algorithm, Direct Binary Search (DBS) and compare the errors in the resulting halftones from the proposed methods, standard DBS, dithering, and error diffusion.