A neural network identification system for space-borne GCMS pattern recognition

Thomas T. Lu; Tien-Hsin Chao

doi:10.1117/12.723633

9 April 2007 A neural network identification system for space-borne GCMS pattern recognition

Thomas T. Lu, Tien-Hsin Chao

Proceedings Volume 6574, Optical Pattern Recognition XVIII; 65740E (2007) https://doi.org/10.1117/12.723633
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

We present experimental results of training a neural network to perform chemical compound identification from a portable space-borne gas chromatographic mass spectrometer (GCMS). The GCMS data has distortion, peak overlap, and noise problems. A signal processing algorithm is first applied to the GCMS to detect the peaks and to clean the MS spectra. We design neural networks to be trained on a sub-set of chemicals that are closely related in the GC graph. Each sub-neural network then identifies the compounds within the sub-set. We design the training data using mostly NIST standard MS data. The NIST mass spectral data of multiple compounds are mixed to train the neural network to identify mixed species. Back-propagation learning algorithm is used to train the neural network. Good identification results have been obtained.

Citation Download Citation

Thomas T. Lu and Tien-Hsin Chao "A neural network identification system for space-borne GCMS pattern recognition", Proc. SPIE 6574, Optical Pattern Recognition XVIII, 65740E (9 April 2007); https://doi.org/10.1117/12.723633

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