Results 81 to 90 of about 3,762,663 (201)

Compressed Sensing of Approximately-Sparse Signals: Phase Transitions and Optimal Reconstruction

, 2012
Compressed sensing is designed to measure sparse signals directly in a compressed form. However, most signals of interest are only "approximately sparse", i.e. even though the signal contains only a small fraction of relevant (large) components the other
Barbier, Jean, Krzakala, Florent, Mézard, Marc, Zdeborová, Lenka   +3 more
core   +2 more sources

Stability Improvement Method for Multi-Converter Distribution Systems Based on Impedance Sensitivity

CSEE Journal of Power and Energy Systems
This paper uses impedance sensitivity to identify the parameters that have dominant influences on the stability of multi-converter systems, which can then efficiently improve system stability.
Yang Li, Zhikang Shuai, Junbin Fang, Xiangyang Wu   +3 more
doaj   +1 more source

Phase coherence and the Nernst effect at magic angles in organic conductors

, 2004
A giant Nernst signal was recently observed for fields near crystallographic directions in (TMTSF)$_2$PF$_6$. Such large Nernst signals are most naturally associated with the motion of pancake vortices.
Chaikin P. M., Kim Y. B., Lebed A. G., Lebed A. G., N. P Ong, Ong N. P., P. M Chaikin, P. W Anderson, Weida Wu   +8 more
core   +1 more source

Modeling and Design of a Frequency Controller for Full-Bridge Active Rectifier Applied to Wireless Power Transfer System

IEEE Access
The dual-phase shift (DPS) controlled full-bridge active rectifier (FBAR) can facilitate a wider operating range and improve transfer performance in wireless power transfer (WPT) systems.
Siyuan Lu, Nejila Parspour
doaj   +1 more source

Distributed Small-Signal Equivalent Circuit Model and Parameter Extraction for SiGe HBT

IEEE Access, 2019
In this paper, we present an improved high frequency small-signal distributed model for SiGe HBTs under forward-active mode based on the transmission line theory.
Yabin Sun, Ziyu Liu, Xiaojin Li, Yanling Shi   +3 more
doaj   +1 more source

Theory of the Bloch Oscillating Transistor

, 2004
The Bloch oscillating transistor (BOT) is a device, where single electron current through a normal tunnel junction can be used to enhance Cooper pair current in a mesoscopic Josephson junction leading to signal amplification.
Engberg J., H. Seppä, J. Hassel
core   +1 more source

Boosting Higgs discovery - the forgotten channel

, 2010
Searches for a heavy Standard Model Higgs boson focus on the 'gold plated mode' where the Higgs decays to two leptonic Z bosons. This channel provides a clean signature, in spite of the small leptonic branching ratios.
A. Hasenfratz, Christoph Hackstein, M. Luscher, M. J. G. Veltman, Michael Spannowsky, V. A. Novikov   +5 more
core   +1 more source

Research on a Small Signal Stability Region Boundary Model of the Interconnected Power System with Large-Scale Wind Power

Energies, 2015
For the interconnected power system with large-scale wind power, the problem of the small signal stability has become the bottleneck of restricting the sending-out of wind power as well as the security and stability of the whole power system. Around this
Wenying Liu, Rundong Ge, Quancheng Lv, Huiyong Li, Jiangbei Ge   +4 more
doaj   +1 more source

Optimizing signal-to-error ratio in standing wave ultrasonic measurements [PDF]

Standing wave ultrasonic techniques for the measurement of very small changes in acoustic attenuation and phase velocity are discussed. Enhanced sensitivity to these small changes was achieved by making the specimen part of a composite ultrasonic ...
Brown, J. J., Miller, J. G., Stubblefield, V. E.   +2 more
core   +1 more source

Block 4 receiver tracking loop performance in the presence of a CW RFI [PDF]

A model that allows one to predict the tracking performance of the Block 4 receiver in the presence of a continuous wave radio frequency interference is discussed.
Sue, M. K.
core   +1 more source