Electronic power converters connected to electrical grids allow industrial processes, traction applications and home appliances to be improved by controlling the energy flow depending on the operation conditions of both the electrical load and the grid. This is the case of variable frequency drives, which can be found in pump drives or ship propulsion systems (Bose, 2009) maintaining the electr...

in the deregulated power systems, transmission congestion is one of the significant and main problems of the electrical networks which can cause incremental cost in the energy. this problem has resulted to new challenging issues in different parts of power systems which there was not in the traditional systems or at least had very little importance. transmission congestion happens when the maxi...

[lo] H. Cramer and M. Leadbetter, “The moments of the number of [13] L. Ehrman, “Analysis of a zero-crossing frequency discriminator crossings of a level by a stationary normal process,” Ann. Math. with random inputs,” IEEE Trans. Aerospace and Navigational Stat., vol. 36, pp. 165661663, 1965. Electronics, vol. ANE-12, pp. 113-119, June 1965. [II] M. Loeve, Probability Theory. New York: Van Nos...

This paper presents the design and analysis of a transformer based 36-pulse ac-dc converters which supplies direct torque controlled induction motor drives (DTCIMD’s) in order to have better power quality conditions at the point of common coupling. The converters output voltage is accomplished via two paralleled eighteen-pulse ac-dc converters each of them consisting of nine-phase diode bridge ...

High-speed and high-resolution analog-to-digital converters (ADC) are critical devices for space electronic systems. Analog Devices’s bipolar technology 12-bit A/D converter, AD574A, was proven to withstand up to 100 krad(Si) [1], but excessive power consumption limits its applications in many new high-speed and low-power system designs. Several other commercial 12-bit successive approximation ...

Murad Abu-Khalaf Suat Gumussoy MIT CSAIL, MIT, Cambridge, MA IEEE Member [email protected] [email protected] February 19, 2018 Abstract We prove that an auxiliary two-point boundary value problem presented in V. L. Kharitonov, Lyapunov matrices for a class of time delay systems, Systems & Control Letters 55 (2006) 610-617 has linearly dependent boundary conditions, and consequently a unique solutio...

We evaluated the potential of two noninvasive genetic sampling methods, hair traps and bear rub surveys, to estimate population abundance and trend of grizzly (Ursus arctos) and black bear (U. americanus) populations in Banff National Park, Alberta, Canada. Using Huggins closed population mark-recapture models, we obtained the first precise abundance estimates for grizzly bears (N= 73.5, 95% CI...

A power electronic converters are becoming more and more popular for medium voltage & high power applications. To overcome the limitation of semiconductors current and voltage ratings in high power applications, multilevel inverter is often considered an effective solution. In addition, stepped waveform in the output of multilevel inverter has better harmonic spectrum than 2-level inverter in l...

1 Center for Genomics and Systems Biology, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates, 2 Ecological Marine Services, Millbank, QLD, Australia, 3 Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark, 4 NOAA/NESDIS/STAR Coral Reef Watch, College Park, MD, United States, 5 Marine Geophysical Laboratory, Physics Department, College of Science and Engi...

Antonio Tilocca,1,* Nora H. de Leeuw,1,2 and Alastair N. Cormack1,3 1Department of Chemistry, University College London, London WC1H 0AJ, United Kingdom 2School of Crystallography, Birkbeck College, London WC1E 7HX, United Kingdom 3New York State College of Ceramics, Alfred University, Alfred, New York 14802, USA Received 24 October 2005; revised manuscript received 20 January 2006; published 3...