| 摘要 |
<p>The composition of aramid polymerization process streams can be predicted by the application of near-infrared spectroscopy, within the wavelength range of 600-2500 nm, especially 1100-2500 nm. The method requires establishing a correlation between composition component of interest of samples of a training set and their near-infrared spectra, developing from that correlation a predictive equation, verifying the accuracy of the predictive equation on samples of a validation set, and applying the predictive equation to the determination of the composition of unkown samples. The absorbance may be measured as the absorbance, or as the first, second, third, fourth, or higher derivative of absorbance or by other signal processing techniques. The signal can be used to control a multi-component process by manipulation of process control actuators which have known impacts upon the components to be controlled.</p> |
