Results 241 to 250 of about 9,439,872 (313)
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Experimental study and constitutive model for viscoelastic damper with frequency independency
StructuresYing Zhou, Xiaofang Liu, Yi Xiao
semanticscholar +3 more sources
IEEE Antennas and Wireless Propagation Letters, 2023
An ultrawideband frequency selective surface (FSS) absorber with high angular stability and polarization independency applied in a microwave band is proposed.
Zihan Sun +3 more
semanticscholar +1 more source
An ultrawideband frequency selective surface (FSS) absorber with high angular stability and polarization independency applied in a microwave band is proposed.
Zihan Sun +3 more
semanticscholar +1 more source
Earth's Future, 2021
The frequency with which tropical cyclones (TCs) occur controls all other aspects of tropical cyclone risk since a storm that does not occur can do no harm. Yet this frequency is poorly understood.
A. Sobel +6 more
semanticscholar +1 more source
The frequency with which tropical cyclones (TCs) occur controls all other aspects of tropical cyclone risk since a storm that does not occur can do no harm. Yet this frequency is poorly understood.
A. Sobel +6 more
semanticscholar +1 more source
Real-time frequency-independent single-Lead and single-beat myocardial infarction detection
Artif. Intell. Medicine, 2021This study proposes a novel real-time frequency-independent myocardial infarction detector for Lead II electrocardiograms. The underlying Deep-LSTM network is trained using the PTB-XL database, the largest to date publicly available electrocardiography ...
Harold Martin +5 more
semanticscholar +1 more source
Frequency-independent linear multibeam antenna array
Radioengineering, 2021A method of forming frequency-independent radiation characteristics for linear antenna arrays with uniform amplitude excitation based on properties of non-equidistant arrays is considered. Due to the non-equidistant placement of radiators the declining equivalent amplitude distribution in the aperture is formed that in conjunction with the introduction
Nikolay I. Bobkov, Ivan N. Bobkov
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Color and Luminance: Independent Frequency Shifts
Science, 1981Simultaneous opposite spatial frequency shifts can be obtained in chrominance and luminance channels. The chrominance shift cannot be transferred interocularly. Chrominance and luminance channels seem to perform similar but independent spatial frequency analyses.
O E, Favreau, P, Cavanagh
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Chipless RFID Readers for Frequency-Coded Tags: Time-Domain or Frequency-Domain?
IEEE Journal of Radio Frequency Identification, 2020Printable ultra-wideband (UWB) frequency-coded chipless radio frequency identification (RFID) tags are suitable candidates for barcode replacement toward developing smart objects.
Javad Aliasgari +2 more
semanticscholar +1 more source
Frequency independent ultrasound contrast-detail analysis
Ultrasound in Medicine & Biology, 1985An ultrasound contrast-detail phantom has been developed to evaluate the image quality of diagnostic ultrasound imaging systems. The phantom includes eight conical targets whose B-mode images show disk lesions such that the object contrast of each lesion relative to background is independent of the imaging device or transducer frequency/spectrum.
S W, Smith, H, Lopez, W J, Bodine
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Frequency-independent beamforming
Proceedings of IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, 2002The beamwidth of a linear array decreases as frequency increases. For broadband beamformers such as microphone arrays for teleconferencing, this frequency dependence implies that signals incident on the outer portions of the main beam are subject to an undesirable lowpass filtering process. In the paper several ways of attaining beamwidth constancy are
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Frequency independent microstrip stacked antenna
International Journal of Electronics, 2000The advancement of technological development in the microstrip antenna and its applications in diverse areas, have given rise to the need for a frequency agile and frequency independent microstrip antenna which could be used for the same range of frequencies without altering the system.
Satish Kumar Sharma +1 more
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