Zobrazeno 1 - 10
of 975
pro vyhledávání: '"Dimitrov, V. P."'
Autor:
Coelho, D. F. G., Cintra, R. J., Bayer, F. M., Kulasekera, S., Madanayake, A., Martinez, P. A. C., Silveira, T. L. T., Oliveira, R. S., Dimitrov, V. S.
Publikováno v:
J. Low Power Electron. Appl. 2018, 8(4), 46
This paper introduced a matrix parametrization method based on the Loeffler discrete cosine transform (DCT) algorithm. As a result, a new class of eight-point DCT approximations was proposed, capable of unifying the mathematical formalism of several
Externí odkaz:
http://arxiv.org/abs/2207.14463
Publikováno v:
Parallel Processing Letters, vol. 22, no. 03, 1250009, 2012
Number-theoretic transforms (NTTs) have been applied in the fragile watermarking of digital images. A block-parallel systolic-array architecture is proposed for watermarking based on the 2-D special Hartley NTT (HNTT). The proposed core employs two 2
Externí odkaz:
http://arxiv.org/abs/2206.01146
Publikováno v:
Electronics Letters 56 (14), 732-734, 2020
In this Letter, we propose a low-complexity estimator for the correlation coefficient based on the signed $\operatorname{AR}(1)$ process. The introduced approximation is suitable for implementation in low-power hardware architectures. Monte Carlo sim
Externí odkaz:
http://arxiv.org/abs/2008.09633
Akademický článek
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Autor:
Dimitrov, V. V., Boeva, S., Martí, J., Bujalance-Fernández, I., Sánchez-Ayaso, E., Latev, G. Y., Nikolov, Y. M., Petrov, B., Mukai, K., Stoyanov, K. A., Zamanov, R. K.
We performed photometry with a 1 minute time resolution of the symbiotic stars EF Aquilae, AG Pegasi and SU Lyncis in Johnson B and V band. Our observations of the symbiotic Mira-type star EF Aql demonstrate the presence of stochastic light variation
Externí odkaz:
http://arxiv.org/abs/1811.03317
Publikováno v:
Computers and Geosciences, no. 119 (2018), pages 109-114
This paper introduces a fast algorithm for simultaneous inversion and determinant computation of small sized matrices in the context of fully Polarimetric Synthetic Aperture Radar (PolSAR) image processing and analysis. The proposed fast algorithm is
Externí odkaz:
http://arxiv.org/abs/1807.08084
Publikováno v:
Circuits and Systems (ISCAS), 2011 IEEE International Symposium on
Koblitz curves are a special set of elliptic curves and have improved performance in computing scalar multiplication in elliptic curve cryptography due to the Frobenius endomorphism. Double-base number system approach for Frobenius expansion has impr
Externí odkaz:
http://arxiv.org/abs/1801.08589
Publikováno v:
J Sign Process Syst (2017)
This paper introduces a new fast algorithm for the 8-point discrete cosine transform (DCT) based on the summation-by-parts formula. The proposed method converts the DCT matrix into an alternative transformation matrix that can be decomposed into spar
Externí odkaz:
http://arxiv.org/abs/1801.05832
Autor:
Stoyanov, K. A., Marti, J., Zamanov, R., Dimitrov, V. V., Kurtenkov, A., Sanchez-Ayaso, E., Bujalance-Fernandez, I., Latev, G. Y., Nikolov, G.
Here we present quasi-simultaneous observations of the flickering of the symbiotic binary star CH Cyg in U, B and V bands. We calculate the flickering source parameters and discuss the possible reason for the flickering cessation in the period 2010-2
Externí odkaz:
http://arxiv.org/abs/1711.01749