Displaying similar documents to “A real-time method for fast determination of the fundamental frequency”

Classification in the Gabor time-frequency domain of non-stationary signals embedded in heavy noise with unknown statistical distribution

Ewa Świercz (2010)

International Journal of Applied Mathematics and Computer Science

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A new supervised classification algorithm of a heavily distorted pattern (shape) obtained from noisy observations of nonstationary signals is proposed in the paper. Based on the Gabor transform of 1-D non-stationary signals, 2-D shapes of signals are formulated and the classification formula is developed using the pattern matching idea, which is the simplest case of a pattern recognition task. In the pattern matching problem, where a set of known patterns creates predefined classes,...

Gravitational radiation from accreting neutron stars

Bernard Schutz (1997)

Banach Center Publications

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Neutron stars may emit steady gravitational wave signals that will be among the first kinds of gravitational wave signals that the new generation of interferometric detectors will search for. I consider here the possibility that accreting neutron stars may be driven into the steady emission of gravitational waves. I estimate the amplitudes that the waves may have if the accretion takes place at the Eddington limit, such as may happen when a neutron star spirals inside a giant star in...

The laser interferometer gravitational wave observatory project LIGO

James Blackburn (1997)

Banach Center Publications

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The Laser Interferometer Gravitational Wave Observatory (LIGO) will search for direct evidence of gravitational waves emitted by astrophysical sources in accord with Einstein’s General Theory of Relativity. State of the art laser interferometers located in Hanford, Washington and Livingston Parish, Louisiana will unambiguously measure the infinitesimal displacements of isolated test masses which convey the signature of these gravitational waves. The initial implementation of LIGO will...

VIRGO: a wide band gravitational wave detector

B. Caron, A. Dominjon, C. Drezen, Raffaele Flaminio, X. Grave, F. Marion, L. Massonnet, C. Mehmel, R. Morand, B. Mours, V. Sannibale, M. Yvert, D. Babusci, S. Bellucci, G. Candusso, G. Giordano, G. Matone, L. Dognin, J. Mackowski, M. Napolitano, L. Pinard, F. Barone, E. Calloni, L. Di Fiore, A. Grado, L. Milano, G. Russo, S. Solimeno, M. Barsuglia, V. Brisson, F. Cavalier, M. Davier, P. Hello, F. LeDiberder, P. Marin, M. Taubman, F. Bondu, A. Brillet, F. Cleva, H. Heitmann, L. Latrach, C. Man, Pham-Tu Manh, J. Vinet, C. Boccara, Ph. Gleyzes, V. Loriette, J. Roger, G. Cagnoli, L. Gammaitoni, J. Kovalik, F. Marchesoni, M. Punturo, M. Bernardini, S. Braccini, C. Bradaschia, R. Del Fabbro, R. DeSalvo, A. Di Virgilio, I. Ferrante, F. Fidecaro, A. Gennai, A. Giassi, A. Giazotto, L. Holloway, P. La Penna, G. Losurdo, F. Palla, Pani Hui-Bao, A. Pasqualetti, D. Passuello, R. Poggiani, G. Torelli, Zhang Zhou, E. Majorana, P. Puppo, P. Rapagnani, F. Ricci (1997)

Banach Center Publications

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Theory of spacecraft Doppler tracking

Massimo Tinto (1997)

Banach Center Publications

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We present a review of the spacecraft Doppler tracking technique used in broad band searches for gravitational waves in the millihertz frequency band. After deriving the transfer functions of a gravitational wave pulse and of the noise sources entering into the Doppler observable, we summarize the upper limits for the amplitudes of gravitational wave bursts, continuous, and of a stochastic background estimated by Doppler tracking experiments.

Detection of moving objects in image sequences using 3D velocity filters

Sam Schauland, Joerg Velten, Anton Kummert (2008)

International Journal of Applied Mathematics and Computer Science

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A movement analysis of objects contained in visual scenes can be performed by means of linear multidimensional filters, which have already been analyzed in the past. While the soundness of the results was convincing, interest in those systems declined due to the limited computational power of contemporary computers. Recent advances in design and implementation of integrated circuits and hardware architectures allow realizing velocity filters if the n-D system is carefully adapted to...

Wavelet transform and binary coalescence detection

Jean-Michel Innocent, Bruno Torrésani (1997)

Banach Center Publications

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We give a short account of some time-frequency methods which are relevant in the context of gravity waves detection. We focus on the case of wavelet analysis which we believe is particularly appropriate. We show how wavelet transforms can lead to efficient algorithms for detection and parameter estimation of binary coalescence signals. In addition, we give in an appendix some of the ingredients needed for the construction of discrete wavelet decompositions and corresponding fast algorithms. ...