PULSED MULTICHANNEL RAMAN SPECTROMETRY OF TRANSIENT STATES

Ultraviolet Raman Spectrometry

Multichannel processing for airborne gamma-ray spectrometry

The conventional approach to the processing of airborne gamma-ray spectrometric data is to first sum the observed spectra over three relatively broad energy windows. These three window count rates are then processed to obtain estimates of the potassium (K), uranium (U), and thorium (Th) elemental abundances. However, multichannel spectra contain additional information on the concentrations of K...

Pulsed Transient Tissue Conductivity Measurement

We present an alternative technique forr obtaining tissue conductivity as a function of frequency. Pulsed transient tissue impedance measurement differs significantly from other commonly used swept frequency techniques in that the conductivity of a tissue sample can be obtained from a voltage transient response to a CW:Tent pulse. By obtaining the conductivity across a band of frequencies from ...

Transient wave estimation: A multichannel deconvolution application

The evolution of new concepts inwave theory have led to proof-in-principle experiments aimed at validating the generation of a specified wave front. Not only have these concepts initiated research in transient wave theory, but they have also caused renewed effort in multichannel signal processing. In this paper, the development ofa processor todeconvolve a transient acoustic wave from sensor ar...

The Effect of Coking on Kinetics of HDS Reaction under Steady and Transient States

A study was made of the coking of a commercial fresh sulfide Ni-Mo/Al2O3 catalyst in a fixed-bed reactor. The catalyst was coked using different coke precursors in the gas oil under accelerated conditions at temperatures of 400 to 450°C to yield different deactivated catalysts containing 2-20 wt% C. Two cases were studied; crushed catalyst without diffusional ...