Results 211 to 220 of about 1,159,066 (265)

Influence of cognitive function on postural control in physically independent older women: a time and time-frequency domain analysis. [PDF]

BMC Geriatr
Pereira C, Gomes BP, da Silva Honorato A, Scherer FC, Pelegrinelli ARM, Smith EC, Moura FA, Probst VS, Coombes JS, da Silva RA, de Castro Teixeira D.   +10 more
europepmc   +1 more source

Research on Jamming Recognition Based on Time-Frequency Domain Weighted Fusion and Attention Mechanism. [PDF]

Sensors (Basel)
Zhang Y, Wang S, Wu L, Yao Y, Pan X.
europepmc   +1 more source

Accounting for squared coherence marginally improves the discriminative power of frequency domain cerebral autoregulation markers in surgical aortic valve replacement patients. [PDF]

Med Biol Eng Comput
Gelpi F, Cairo B, Bari V, De Maria B, Singh P, Anguissola M, De Vincentiis C, Volpe M, Molfetta R, Ranucci M, Porta A.   +10 more
europepmc   +1 more source

Serum Cytokine Levels and Heart Rate Variability in the Frequency Domain in Patients With Chronic Chagas Heart Disease. [PDF]

Cureus
Bestetti RB, Dellalibera-Joviliano R, Faria Junior M, Furlan Daniel RA, Domingos CC.   +4 more
europepmc   +1 more source

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Single-Carrier Frequency-Domain Equalization Based on Frequency-Domain Oversampling

IEEE Communications Letters, 2012
A technique based on the frequency-domain oversampling in Single-Carrier Frequency-Domain Equalization is proposed. Simulation results show that the proposed system based on frequency domain oversampling outperforms the conventional system in static frequency-selective channel.
Chen Enqing, Xiaomin Mu
exaly   +2 more sources

On watermarking in frequency domain

SPIE Proceedings, 2010
A wavelet-based image watermarking scheme is proposed, based on insertion of 'logo' image as watermark in midfrequency domain. This new approach provides flexibility in determining the pixel to be watermarked and increases the data hiding capacity. It is easy to implement watermark embedding algorithm as well as the corresponding detection algorithm.
Narendrakumar Ramchandra Dasre, Hemraj Ramdas Patil   +1 more
openaire   +1 more source

Image Morphing in Frequency Domain

Journal of Mathematical Imaging and Vision, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
M. Shahid Farid, Arif Mahmood
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Frequency domain chaotic watermarking

ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196), 2002
A watermarking procedure to be applied in the frequency domain to digital images has been proposed and investigated, with purpose of copyright protection. The selected digital signature is a chaotic sequence embedded by considering a shaping function to weight in different manner each sequence value, as a function of the image properties in the ...
GIOVANARDI, Alessandra, MAZZINI, Gianluca   +1 more
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The Ultrahigh-Frequency Domain

Transactions of the American Institute of Electrical Engineers, 1937
Use of ultrahigh frequencies for educational broadcasting has been thought to offer attractive possibilities because of the supposedly almost unlimited number of channels; however, the demands of other radio services, particularly television, may be expected to congest this newly opened region. Ultrahigh-frequency waves behave somewhat like light waves,
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The frequency domain

2002
We are familiar with systems that are dynamic, that is, systems whose output signals vary with time. Examples are shown in Figure 14.1.
Jacqueline Wilkie, Michael Johnson, Reza Katebi   +2 more
openaire   +1 more source