Results 251 to 260 of about 2,996,612 (302)

Localization by Doppler Derivatives and Doppler-Shifted Frequencies

IEEE Transactions on Signal Processing
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Xiaochuan Ke, K. C. Ho
openaire   +1 more source

Acoustic Doppler shifts in medicine

Applied Acoustics, 2007
This is a brief discourse on the history of the uses of acoustic Doppler frequency shifts in modern medicine. The Doppler effect and the Doppler equation are discussed. The technological developments over the last half century are covered, as well as their applications in diagnostic medical sonography.
Terry J. DuBose, Anthony L. Baker
openaire   +1 more source

Doppler shifts in zodiacal light

Planetary and Space Science, 1987
Abstract Doppler shifts in zodiacal light are calculated for various eccentricities, dust sizes, and assumptions about radiation pressure. The purpose is to determine what effects in spectra might be observed which would enhance our understanding of the origin and lifetimes of interplanetary dust. The solar absorption line half-width in the scattered
D.C. Hirschi, D.B. Beard
openaire   +1 more source

Optimal sensor placement for Doppler shift target localization

International Radar Conference, 2015
A key component of cognitive radar is intelligent signal processing which encompasses an algorithmic decision-making process for adaptive transmitted waveform selection and online optimal path planning for moving radar platforms in order to deal with non-
Ngoc Hung Nguyen, K. Doğançay
semanticscholar   +1 more source

Doppler Interpretation of Quasar Red Shifts

Science, 1966
The hypothesis that the quasistellar sources (quasars) are local objects moving with velocities close to the speed of light is examined. Provided there is no observational cutoff on apparent bolometric magnitude for the quasars, the transverse Doppler effect leads to the expectation of fewer blue shifts than red shifts for an isotropic ...
openaire   +2 more sources

Doppler-shifted Fourier Transform Spectroscopy

Fourier Transform Spectroscopy: New Methods and Applications, 1999
This paper describes the principles and applications of Doppler-shifted (DS) Fourier Transform Emission (FTE) spectroscopy.
openaire   +1 more source

Doppler Phase-Shifting Digital Holography

Frontiers in Optics 2011/Laser Science XXVII, 2011
In digital holography, continuous reference mirror movement generates phase modulation. The object phase is obtained by the phase at one of peaks in Fourier spectra of time-varying fringe data. Some applications are presented.
openaire   +1 more source

On accurate localization of sensor nodes in underwater sensor networks: a Doppler shift and modified genetic algorithm based localization technique

Evolutionary Intelligence, 2020
Amrita Datta, Mou Dasgupta
semanticscholar   +1 more source

Doppler Shift of Surface Backscatter

The Journal of the Acoustical Society of America, 1972
Spectral analyses of underwater backscattered sound are carried out. Measurements are presented showing different Doppler shifts for volume and surface reverberation. Reversal of Doppler polarity is shown for 180° rotation of the underwater sound transducer.
openaire   +1 more source

Doppler shift dominated cyclotron masers

International Journal of Electronics, 1984
Abstract Since in a Doppler shift dominated cyclotron maser, the Doppler term is the main contribution to the output frequency, the electron-beam momentum spread plays an important role in determing the gain and efficiency. It is demonstrated by computer simulations that the increase in beam momentum spread diminishes the gain slightly but reduces the ...
openaire   +1 more source