Pulse wave

Each experimential values and the calculative values in Fig.7 and Fig.9 are almost corresponding except for the region of the echo height F/B rapidly decreases. This reason is thought that the experiment using a pulse wave but the calculative using a continuous wave. 

High pressure explosive loading was carried out on both z- and y-cut crystals at pressures between about 25 and 60 GPa ([83S01, 77S01]). The z-cut crystals responded in the plus-x orientation with current pulse wave shapes as predicted by the three-zone model. Nevertheless, limited experiments in the minus-z orientation of lithium niobate do not show the positive currents expected from the three-zone model. 

Figure 1.6 (a) A square pulse wave number distribution, (b) The modulating function corresponding to the wave number distribution in Figure 1.6( ). 

Figure 1.7 The real part of a wave packet for a square pulse wave number distribution.

THORNTON, J. D. Trans. Inst. Chem. Eng. 35 (1957) 316. Liquid-liquid extraction. Part XIII. The effect of pulse wave-form and plate geometry on the performance and throughput of a pulsed column. 

LaCourse, W. R., Pulsed Electrochemical Detection in High Performance Liquid Chromatography, Wiley, New York, 1997. The chapters on the various types of stripping with pulsed wave forms are very good. 

Picryl bromide can be coupled at or below room temperatures by copper powder used in only 10 % excess, to give coupling or reduction products depending on the solvent and stoichiometric conditions (Eq. 3.17) [105]. Sonications were performed with a pulsed wave, a technique not frequently used. 

Fig. 2.3. One of the original scanning acoustic microscopes. It worked in transmission, so that it was not necessary to use pulsed waves, and the detected transmitted signal could be used directly to modulate the beam in a cathode ray tube. The slow scan was provided by a small motor driving a lead screw, and the fast scan by a modified loudspeaker coil (Lemons and Quate 1974,1979).

This pulsed wave process provides simultaneous information on all the frequencies present. The generalisation of this process, which can be computerised and allows the study of less sensitive nuclei such as 13C, has led to major developments in NMR. 

Figure 9.9—The 13 C interferogram of Jiuoroacetone obtained with a pulsed wave instrument. The signal I = /(/) is converted by Fourier transform into the classical spectrum I = f(u), which corresponds to the spectrum shown in Fig. 9.1. The interferogram, obtained in only a few seconds, can be accumulated tens of times before it undergoes a Fourier transformation. This results in an increase in the signal-to-noise ratio.

Propagation of either continuous or pulsed waves below the kHz or MHz range. 

The action of a circularly polarised pulse leads to a repopulation of electrons and holes between states with a different angular momentum component in the direction of the pump pulse wave vector. The corresponding SIFE relaxation time describes the recovery of the symmetry of the initial angular momentum distribution. Again it is preferable that the probe response is dominated by intraband transitions or else inelastic scattering may obscure the relaxation of hot electron (hole) angular momentum. 

Traveling Waves. We now show that constant velocity waves in this model can be studied in terms of time delay equations. Sustained oscillatory or pulse wave propagation seems to control slime mold slug motion and certain aspects of chick embryo development. 

Any sound can be visualized as a waveform, like the cross section of a ripple on a pond. When in the 64 mode, the Commodore 128 is capable of reproducing four different waveforms. Three of them (the triangle, sawtooth, and pulse waves) produce clear tones, and the fourth (the noise wave) makes a rushing or hissing sound. Figure 1 represents each of these waveforms. You can assign any one of the four waveforms to any of the 128 s three sound channels, or voices. 

As you ll discover by experimenting, these special effects work well with certain combinations, and poorly (or not at all) with others. Ring modulation works only when you set the carrier voice to the triangle waveform. Synchronization works with any waveform, but synchronizing any frequency with the noise waveform (a nearly random combination of many frequencies) doesn t accomplish much. The sawtooth and pulse waves often sound similar. 

Blacher J, Safar ME, Guerin AP, Pannier B, Marchais SJ, London GM. Aortic pulse wave velocity index and mortality in end-stage renal disease. Kidney Int 2003 63 1852-60. 

This pulsed wave technique, is a simultaneous method in the sense that the apparatus acquires, at each instant, information concerning all of the frequencies present. The major developments of current NMR result from the generalization of this procedure which permits the study of less sensitive nuclei, such as... 

Figure 15.10 Interferogram of fluroacetone obtained with a pulsed wave NMR instrument. The signal I =f(t), after conversion to a classic spectrum I =f v) by Fourier transform, is that of the spectrum shown in Figure 15.18. The interferogram, recorded over of a few seconds can be accumulated many times to improve the signal/background noise ratio. The computer does not record a continuous FID, but a FID that is sampled at a constant interval.

Raitta C, Tolonen M. 1975. Ocular pulse wave in workers exposed to carbon disulfide. Albrecht von Graefes Arch Klin Exp Ophthalmol 195 149-54. 

Figure 9-7 Average, Quasi-peak and Peak Readings of a Pulsed Wave...

Hz (270° Gaussian pulse),. .. wave halfg128.shp and 17.5 Hz (90° Half-Gaussian pulse),. .. wave gcas128.shp and 139 Hz (90° Gaussian Pulse Cascade). Process the FIDs (Si(r+i) 64k, wdw EM, LB 1.0 [Hz]) and compare the profiles for the phase alternation from a positive to a negative offset frequency. 

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