By L. Marton (ed.)
This quantity comprises evaluate articles protecting a extensive variety of issues in picture processing and research. the themes lined contain snapshot research - which has united and harmonized a number of heterogeneous fabric; modern methods to the Fourier remodel; quantity theoretic transforms, that are fairly beautiful for discrete, finite signs; using the Wigner distribution - which encodes either spatial and spectral info, for snapshot filtering; and purposes of the concept that of data power. those updated surveys are meant to supply the reader with entry to the most recent leads to the tremendous lively box of snapshot technological know-how.
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Extra resources for Advances in Electronics and Electron Physics, Vol. 35
2. becomes positive with respect to ground, thus generating antiforce waves. 1 is pulsed negatively, proforce waves are propagated. 80 of the latter. Wave speeds were obtained by measuring the time of flight of the wave for viewing slots 0. I m apart along the discharge tube. The widths and effective 42 RICHARD G. FOWLER heights of the slots were adjusted to insure signals of near constant amplitude for accurate velocity measurements. The wave-speed data were plotted as a function of distance and the results for waves of both polarities appear in Figs.
5 x lo6 m/sec, a fact that is in accord also with the observations of Haberstich. (b) In experiments where the velocity of the decelerating wave passed below 3 x lo6 at some point in the apparatus, no wave was detectable beyond this point. The waves at 30 Torr were an exception to this, showing starting and running values to below 8 x lo5 m/sec. The method used for determining electron temperatures and densities was an adaption of a spectroscopic method proposed by Sovie (31) and perfected NONLINEAR ELECTRON ACOUSTIC WAVES, 7t 19 I 5 A h a d .
30. 8, by Latimer. Mills, and Day (32) in a situation similar to this one, but quasistatic. It depends on taking the ratio of the intensities of two emission lines. When the excitation of gas atoms is due solely to random electron collisions, and multiple processes such as excitation transfer or excitation from the metastable states are negligible, the intensity ratio of two spectral lines, as measured by the signal S from a photomultiplier tube, is given by SjklSim = ( Q j r l l > I ( Qimzl> (3) or SjklSlm == < .
Advances in Electronics and Electron Physics, Vol. 35 by L. Marton (ed.)