Measurements on the Dependence of Frequency and Spectral Width upon Iodine Pressure, Modulation Amplitude and Output Power of 633nm ~(127)I_2 Stabilized He-He Lasers
Investigations On THE DIFFERENTIAL PULSE POLAROGRAPHY (Ⅶ) THE INFLUENCE OF THE PULSE AMPLITUDE AND THE POTENTIAL SCAN RATE ON THE SHAPE OF THE POLAROGRAPHIC WAVE
It is well known that amplitude modulation does not affect Fredholmness of Toeplitz operators.
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The finite dimension of the global attractors for the systems of the perturbed and unperturbed dissipative Hamiltonian amplitude equations governing modulated wave are investigated.
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A new feature extraction method using the amplitude fluctuation property of target HRRP for radar automatic target recognition
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Actually, the amplitude fluctuation property of target HRRP also represents some feature information of the target.
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Based on the scattering center model, a new feature extraction method using the amplitude fluctuation property of target HRRP is proposed in this paper.
A method based upon simple diffraction theory is described for the calculation of modified paraboloid reflectors to produce from a point source a shaped beam of arbitrary shape in one plane and uniformly narrow in the perpendicular planes. A specific application of the shaped beam antennas is in connection with radar antennas designed for height finding. In this case the antenna must have a sharp elevation beam for obtaining precise elevation information and a rapid elevation scan. The beam must be relative...
Hair-line cracks or flakes in steel are known to be associated with the presence of hydrogen. A prevailing theory states that the crack formation is due to disruptive hydrogen pressure being built up in defects in steel. However, little was known regarding to the nature of these defects and the detailed mechanism of the hair-line crack formation. An attempt was made in the present research to investigate this problem by means of internal friction measurements. The preliminary experiments show: (1) The prese...
In this note, a simple but not rigorous proof for dispersive relations is given. The proof proceeds by expanding the causal amplitude with respect to the intermediate states and considering the analyticity of the energy denominator and the corresponding numerator separately. While the analyticity of the energy denominator is more or less obvious, the proof of the analyticity of the numerator, say 2V, is achieved by considering the analyticity of the corresponding numerator where the mass μ2 has been r...