Results 221 to 230 of about 4,285,302 (266)
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FFT multi-frequency synthesizer
ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing, 2003An fast-Fourier-transform (FFT)-based procedure which synthesizes the waveform directly from the set of spectral components is presented. A Gaussian window function is introduced to deal with noninteger frequencies. There exists an optimal condition for the width of the window which minimizes the numerical error. Techniques for the generation of linear
Makoto Tabei, Mitsuhiro Ueda
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Hybrid Observer for multi-frequency signals
IFAC Proceedings Volumes, 2010Abstract We proposed a hybrid observer to estimate the frequencies of a signal even in the presence of saturation. Semi-global exponential convergence of the estimation error is provided, and the problem of retrieve dynamically the angular frequencies is addressed.
CARNEVALE, DANIELE +2 more
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UniTag: Enabling Multi-Frequency Backscatter
GLOBECOM 2020 - 2020 IEEE Global Communications Conference, 2020In this paper, we for the first time demonstrate how to realize multi-frequency backscatter communication for low power IoT devices. Our key innovation is an encoding rule that works from O(100) MHz to 2.4 GHz to cover most commercial communication bands such as BLE, LoRa and Wi-Fi.
Qianru Li +3 more
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Multi-frequency rapid-scan HFEPR
Journal of Magnetic Resonance, 2018Gaining access to electron spin dynamics at (sub-)THz frequencies is highly challenging. However, this information is highly relevant for the understanding and development of spin polarization agents in dynamic nuclear polarization methods and single-molecule magnets for quantum computation.
O, Laguta +3 more
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Multi-frequency transformation for edge detection
Proceedings of the 27th Conference on Image and Vision Computing New Zealand, 2012This paper investigates the use of a multi-frequency transformation for edge detection. Most edge detectors are good at detecting non-texture edges, but have problems with texture edges. In order to detect texture edges, prior knowledge is usually required to avoid heavy computational cost. In this study, a fast and simple transformation based on multi-
Wenlong Fu +2 more
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Systematic errors in multi-frequency EIT
Physiological Measurement, 2000Systematic errors have been measured with a multi-frequency data-collection system operating between 10.24 and 81.92 kHz. The errors were present even though a conventional background measurement on a uniform saline phantom had already been subtracted.
J, Schlappa, E, Annese, H, Griffiths
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MULTI-FREQUENCY ICE DETECTION SYSTEM
Sensors and Microsystems, 2008This paper presents the design and performance evaluation of a new sensor system for detecting the presence of water or ice films on its surface. The system is based on a multifrequency capacitive measurement and the effect that water and ice have different dielectric constants.
PASERO, Eros Gian Alessandro +2 more
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A multi-frequency method for ultrasonic ranging
Ultrasonics, 2015This paper presents a method for ultrasonic ranging based on the cross-correlation of two multi-frequency signals. The stimulus signal is composed by multiple sine-wave bursts/segments, each containing a different frequency and an integer number of periods.
Ricardo, Queirós +3 more
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2001
Abstract Both EPR and nuclear frequency spectra are most easily interpreted in the high-field limit where the electron or nuclear Zeeman interaction are the dominating interactions in the relevant spin Hamiltonian. On the other hand some pulse EPR experiments such as nuclear modulation techniques can only be applied if field-independent ...
Arthur Schweiger, Gunnar Jeschke
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Abstract Both EPR and nuclear frequency spectra are most easily interpreted in the high-field limit where the electron or nuclear Zeeman interaction are the dominating interactions in the relevant spin Hamiltonian. On the other hand some pulse EPR experiments such as nuclear modulation techniques can only be applied if field-independent ...
Arthur Schweiger, Gunnar Jeschke
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Multi-frequency ESR in EuFe2As2
Journal of the Korean Physical Society, 2013We have performed multi-frequency electron spin resonance (ESR) measurements on EuFe2As2, which is one of the parent compounds of Fe-based superconductors. At T SDW=190 K, this compound shows a spin-density-wave (SDW) transition.
Masami Ikeda +5 more
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