Accuracy of Quantitative Spectrographic Analysis

The quantitative spectrographic analysis of the rare earth elements.

Spectrographic methods applicable to the determination of major rare earth constituents in complex mixtures are described. The specific examples discussed are the determination of yttrium and gadolinium in the concentration range of 10 to 100 per cent. The procedures involve the high current DC arc excitation of rare earth oxide sample-ceric oxide-graphite mixtures. Selected lines of cerium are...

Improving recognition accuracy in noise by using partial spectrographic

D espite decades of focused research on the problem, the accuracy of automatic speech recognition (ASR) systems is still adversely affected by noise and other sources of acoustical variability. For example, there are presently dozens, if not hundreds, of algorithms that have been developed to cope with the effects of quasistationary additive noise and linear filtering of the channel [16], [23]....

Section 16.0: Spectrographic Analysis of Combustion Products

Accuracy in Quantitative 3D Image Analysis.

Quantitative 3D imaging is becoming an increasingly popular and powerful approach to investigate plant growth and development. With the increased use of 3D image analysis, standards to ensure the accuracy and reproducibility of these data are required. This commentary highlights how image acquisition and postprocessing can introduce artifacts into 3D image data and proposes steps to increase bo...

Phono-spectrographic analysis of heart murmur in children

BACKGROUND More than 90% of heart murmurs in children are innocent. Frequently the skills of the first examiner are not adequate to differentiate between innocent and pathological murmurs. Our goal was to evaluate the value of a simple and low-cost phonocardiographic recording and analysis system in determining the characteristic features of heart murmurs in children and in distinguishing innoc...