Results 231 to 240 of about 907,396 (290)

Linking mpox wastewater surveillance with reported clinical cases in three countries in Sub-Saharan Africa

Sgarabotto E, Tiwari A, Kabena M, Lyimo E, Lompo P, Shea D, Ngelesi E, Mushumbusi JP, Zakaria G, Msoma E, Kabore B, Mnyawonga SC, Yougbare S, Chuwa M, Tran TT, Salmivirta E, Miller T, Rytkönen A, Lood R, Krolicka A, Tahita MC, Baraka V, Maketa V, Pitkänen T.   +23 more
europepmc   +1 more source

Matrix filters for passive sonar

2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221), 2002
This paper introduces matrix filters as a tool for localization and detection problems in passive sonar. The outputs of an array of sensors, at some given frequency, can be represented by a vector of complex numbers. A linear filtering operation on the sensor outputs can be expressed as the multiplication of a matrix (called a matrix filter) times this
Vaccaro, Richard J., Harrison, Brian F.
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Quasi-Passive Filter for Harmonic Filtering

Electric Power Systems Research, 2008
To overcome the limitations of conventional shunt passive filters, a quasi-passive filter has been proposed in this paper. It comprises of a parallel and series tuned LC tank circuit. Unlike the conventional shunt passive filter, the quasi-passive filter utilizes a large value ac capacitor.
R Mahanty
exaly   +2 more sources

Analysis and Design of Passive Polyphase Filters

IEEE Transactions on Circuits and Systems I: Regular Papers, 2008
Passive RC polyphase filters (PPFs) are analyzed in detail in this paper. First, a method to calculate the output signals of an n-stage PPF is presented. As a result, all relevant properties of PPFs, such as amplitude and phase imbalance and loss, are calculated.
Ryynänen Jussi, Stadius Kari, Halonen Kari A I, Kaukovuori Jouni   +3 more
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An investigation on the selection of filter topologies for passive filter applications

IEEE PES General Meeting, 2009
Passive filters have been a very effective solution for power system harmonic mitigation. These filters have several topologies that give different frequency response characteristics. The current industry practice is to combine filters of different topologies to achieve a certain harmonic filtering goal.
A.B. Nassif, null Wilsun Xu, W. Freitas
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A sharp programmable passive filter based on filtering by Aliasing

2015 Symposium on VLSI Circuits (VLSI Circuits), 2015
This paper presents the 1st integrated circuit demonstration of Filtering by Aliasing (FA). FA is a recent technique that uses linear periodically time varying (LPTV) analog circuitry prior to a sampler to provide a desired CT-to-DT transfer function. Such LPTV signal processing offers far superior programmability and performance relative to LTI design.
Neha Sinha, Mansour Rachid, Sudhakar Pamarti   +2 more
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Multi-output passive digital filters

2004 IEEE Electro/Information Technology Conference, 2004
In this paper, a new family of four multi-output second-order passive digital filters constructed from four passive digital two-ports are presented. The conditions for passivity in a passive digital two-port are first defined. Four passive two-ports are introduced, their passivity and stability constraints on coefficients, and pseudopower expressions ...
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A Revisit to Strictly Passive FIR Filtering

IEEE Transactions on Circuits and Systems II: Express Briefs, 2018
This brief revisits the strictly passive finite impulse response (FIR) filtering problem in discrete-time state space. An initial result on the strictly passive FIR filter was presented by Ahn in 2012, but was restricted to state-space models with a nonsingular system matrix, which limits the scope of application. In this brief, we propose a new design
Choon Ki Ahn, Shunyi Zhao, Yuriy S. Shmaliy, Rathinasamy Sakthivel   +3 more
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Combined system of a series active filter and a shunt passive filter—an optimum design of the shunt passive filter

Electrical Engineering in Japan, 1993
AbstractThe combined system of a series active filter and a shunt passive filter that is proposed by the authors has the ability to eliminate a major disadvantage of shunt passive filters, namely, harmonic amplification. The series active filter needs a much smaller kVA rating than a conventional shunt active filter, and as a result, the combined ...
Hideaki Fujita, Hirofumi Akagi
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