Inspec keywords: ultraviolet spectroscopy; optical sensors; chemical sensors; pattern classification; spectrochemical analysis; spectroscopy computing; neural nets; visible spectroscopy; water pollution measurement; backpropagation; water pollution control; encoding

Other keywords: backpropagation; self-learning; mathematical models; on-line pollution monitoring; three-stage scheme; absorption spectra model; species type estimation; optically based sensors; classification; species concentration; UV-visible spectral data; principal component analysis; binary encoded 2nd-differential spectrometry; contaminants; neural networks; chemical pollutants; waste water

Subjects: Chemical variables control; Physics and chemistry computing; UV and visible spectroscopy and spectrometers; Pollution control; Measurement techniques and instrumentation in environmental science; Pattern recognition; Pattern recognition; Data handling and computation; Chemical sensors; Systems theory applications in natural resources and ecology; Water (environmental science); Nonelectric transducers and sensing devices; Electromagnetic radiation spectrometry (chemical analysis); Neural nets (theory)