Results 251 to 260 of about 3,568,332 (307)

Finger movements classification based on fractional Fourier transform coefficients extracted from surface EMG signals

Biomedical Signal Processing and Control, 2021
EMG signals have played a pivotal role as a fundamental component of myriad modern prostheses to control prostheses’ movements as well as identifying individual and combined hand or finger gestures.
Zahra Taghizadeh, Saeid Rashidi, A. Shalbaf   +2 more
semanticscholar   +1 more source

Fourier-Haar coefficients

Mathematical Notes of the Academy of Sciences of the USSR, 1984
A Banach lattice E is called p-concave, \(1\leq ...
Novikov, I. Ya., Semenov, E. M.
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Decrease of Fourier coefficients of stationary measures

Mathematische Annalen, 2017
Let $$\mu $$μ be a Borel probability measure on $${\mathrm {SL}}_2(\mathbb {R})$$SL2(R) with a finite exponential moment, and assume that the subgroup $$\varGamma _{\mu }$$Γμ generated by the support of $$\mu $$μ is Zariski dense.
Jialun Li
semanticscholar   +1 more source

ON FOURIER COEFFICIENTS

Mathematics of the USSR-Sbornik, 1981
Let be an orthonormal system of functions on the interval , and let the function . We investigate the question of the convergence or divergence (depending on the smoothness of the function ) of series of the form where or with .It is shown that in a certain sense, the assertions obtained are definitive for the Haar system.Bibliography: 14 titles.
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On Density of Fourier Coefficients

Canadian Mathematical Bulletin, 1973
Letfbe anLintegrable real valued function of period 2π and let(1)be its Fourier series. It is known that iffis of bounded variation then allnanandnbn(n=1,2,3,…) lie in the interval [-V(F)/π, V(F)/π;] whereV(f) is the total variation off. M. Izumi and S.
openaire   +1 more source

The calculation of Fourier Coefficients

SIAM Journal on Numerical Analysis, 1967
where q is a positive integer and f(x) is a real function which, together with its first 2p derivatives, is continuous in the interval [0, 1]. The method involves calculating trapezoidal rule approximationsto 1 f(t) dt with different mesh ratios and combining these results. In the case that f(x) is a periodic function with period 1, this method reduces
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Classification of heart sounds using fractional fourier transform based mel-frequency spectral coefficients and traditional classifiers

Biomedical Signal Processing and Control, 2020
Heart sounds are a rich source of information for early diagnosis of cardiac pathologies. Distinguishing normal from abnormal heart sounds requires a specially trained clinician.
Zaid Abduh, E. Nehary, M. Wahed, Y. Kadah   +3 more
semanticscholar   +1 more source

Estimates of Fourier Coefficients

gmj, 2003
Abstract Some well-known properties of the trigonometric system as well as of the Haar and Welsh systems are generalized to general orthonormal systems.
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The Möbius inversion and Fourier coefficients

Applied Mathematics and Computation, 2001
The authors show that an analogue of the Möbius inversion formula in a commutative semigroup with unique factorization can be used to study \(n\)-dimensional Fourier coefficients. The authors utilize to this aim an arbitrary algebraic number field of degree \(n\), whose ring of integers is a unique factorization domain.
Zhao-Dou Chen, Yanan Shen, Jun Ding
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On the magnitude of Vilenkin–Fourier coefficients

European Journal of Mathematics, 2020
Let us denote \(P=\{p_n\}\) a sequence of natural numbers, such that, \(p_n\geq 2\), \(\forall n\in\mathbb{N}\) and Let \(m_0=1\), \(m_n=p_nm_{n-1}\). Then, every \(x\in[0,1)\) can be written as \(x=\sum_{n=1}^{\infty}\frac{x_n}{m_n}\), where \(x_n\in\mathbb{Z}\cap[0,p_n)\).
Volosivets, Sergey S., Kuznetsova, Maria A.   +1 more
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