Results 271 to 280 of about 766,611 (315)

Multi-Frequency Sar Data for Agriculture

IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium, 2022
The study aims to consolidate and validate a suite of Earth Observation algorithms of interest for applications in agriculture. The algorithms are at different levels of maturity. Still, they share the objective of contributing to sustainable water management and food security.
Francesco Mattia, Anna Balenzano, Giuseppe Satalino, Francesco Lovergine, Annarita D'Addabbo, Davide Palmisano, Riccardo Grassi, Francesco Nutini, Mirco Boschetti, Giorgia Verza, Michele Rinaldi, Sergio Ruggieri, Angelo Pio De Santis, Vanessa Paredes Gómez, David Alfonso Nafría García, Deodato Tapete   +15 more
openaire   +3 more sources

Multi-frequency rapid-scan HFEPR

Journal of Magnetic Resonance, 2018
Gaining 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, M, Tuček, J, van Slageren, P, Neugebauer   +3 more
openaire   +2 more sources

FFT multi-frequency synthesizer

ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing, 2003
An 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
M. Tabei, M. Ueda
openaire   +1 more source

MULTI-FREQUENCY ICE DETECTION SYSTEM

Sensors and Microsystems, 2008
This 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, RICCARDI, MARCO, MEINDL T.   +2 more
openaire   +2 more sources

Multi-frequency EPR

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
openaire   +1 more source

Multi-frequency transmission tomography

The Journal of the Acoustical Society of America, 1983
Multi-frequency signals were transmitted using a plane-wave transducer, through a water immersed phantom consisting of two finger cots, one containing 50% isopropanol alcohol and the other containing normal saline. The scattered ultrasound was received with a small hydrophone and detected with a quadrature detection system.
openaire   +1 more source

Systematic errors in multi-frequency EIT

Physiological Measurement, 2000
Systematic 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
openaire   +2 more sources

Bioelectrical spectroscopy from multi-frequency EIT

Physiological Measurement, 1994
A method is described by which bioelectrical spectroscopy could be combined with multi-frequency electrical impedance tomography (EIT) enabling a Cole-Cole plot to be drawn for any selected pixel in the image for tissue characterization. To demonstrate the principles of the method, multi-frequency EIT measurements were simulated with a numerical model.
H, Griffiths, J, Jossinet
openaire   +2 more sources

Hybrid Observer for multi-frequency signals

IFAC Proceedings Volumes, 2010
Abstract 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, GALEANI, SERGIO, ASTOLFI, ALESSANDRO   +2 more
openaire   +2 more sources

Multi-frequency piezoelectric energy harvester

The Journal of the Acoustical Society of America, 2005
An energy harvesting device is provided. The energy harvesting device includes structural members covered with piezoelectric material resonating at different primary frequencies. As the structure to which the energy harvesting device is secured vibrates over a range of frequencies, more than one member resonates or is close to resonance.
Matthew C. Malkin, Christopher L. Davis
openaire   +1 more source