Results 21 to 30 of about 1,160,559 (367)
IEEE Access, 2020 In the waveform design, the distance measurement and resolution are a pair of irreconcilable contradictions. Linear Frequency Modulation (LFM) can alleviate this contradiction.
Yuankun Peng +7 more
doaj +1 more source
Longitudinal piezoelectric resonant photoelastic modulator for efficient intensity modulation at megahertz frequencies [PDF]
, 2021 Intensity modulators are an essential component in optics for controlling free-space beams. Many applications require the intensity of a free-space beam to be modulated at a single frequency, including wide-field lock-in detection for sensitive measurements, mode-locking in lasers, and phase-shift time-of-flight imaging (LiDAR).
arxiv +1 more source
Method of calibrating modulation meter MI 2305
Vojnotehnički Glasnik, 2000 In this article an original way of calibrating the MI 2305 modulation meter is described. AM traceability is achieved using tree secondary etalons. FM traceability calibrating is achieved by using the Bessel zero method.
Milovan Unković
doaj +1 more source
Monitoring of helicopters swash-plate wear using the FAM-C diagnosis method
Diagnostyka, 2022 Helicopter rotor dynamics (blade vibrations, ground resonance, influence of forward speed, etc.) play an important role in the wear and tear of the transmission system and power unit.
Andrzej Jan Gębura +5 more
doaj +1 more source
Association of molecules using a resonantly modulated magnetic field [PDF]
, 2006 We study the process of associating molecules from atomic gases using a magnetic field modulation that is resonant with the molecular binding energy. We show that maximal conversion is obtained by optimising the amplitude and frequency of the modulation ...
J. R. Taylor +4 more
core +1 more source
Frequency modulated microrheology
Lab on a Chip, 2015 Coupling analog frequency modulation (FM) to the driving stimulus in active microrheology measurements conducted with optical tweezers effectively parallelizes numerous single-frequency experiments.
Eric M. Furst, Matthew M. Shindel
openaire +4 more sources
Different frequency control mechanisms and the exploitation of frequency space in passerines
Ecology and Evolution, 2021 Birdsong is used in reproductive context and, consequently, has been shaped by strong natural and sexual selection. The acoustic performance includes a multitude of acoustic and temporal characteristics that are thought to honestly reveal the quality of ...
Franz Goller, Jay Love, Gabriel Mindlin
doaj +1 more source
Radio Physics and Radio Astronomy, 2022 Subject and Purpose. In Part 1 of the paper, a mathematical model of an autodyne self-oscillator with frequency tuning by varactor capacitance varying is built and thoroughly analyzed for the features of signal formation in autodyne radar with a wide ...
G. P. Ermak +5 more
doaj +1 more source
Mid-infrared wavelength- and frequency-modulation spectroscopy with a pump-modulated singly-resonant optical parametric oscillator [PDF]
, 2006 We describe the implementation of the wavelength- and frequency-modulation spectroscopy techniques using a singly-resonant optical parametric oscillator (OPO) pumped by a fiber-amplified diode laser.
Adhimoolam, B. +4 more
core +3 more sources
Generalized frequency modulation [PDF]
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, 2001 A generalization of frequency modulation is developed in which state trajectories of dynamical systems are used as carrier waves. Our focus is on the design and analysis of modulators and demodulators for such generalized frequency modulation systems. In particular, we show that for a class of dynamical systems, among which are certain chaotic systems,
Rodolfo R. Rosales +2 more
openaire +2 more sources