Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Neural network pattern recognition of thermal-signature spectra for chemical defense

Not Accessible

Your library or personal account may give you access

Abstract

We treat infrared patterns of absorption or emission by nerve and blister agent compounds (and simulants of this chemical group) as features for the training of neural networks to detect the compounds’ liquid layers on the ground or their vapor plumes during evaporation by external heating. Training of a four-layer network architecture is composed of a backward-error-propagation algorithm and a gradient-descent paradigm. We conduct testing by feed-forwarding preprocessed spectra through the network in a scaled format consistent with the structure of the training-data-set representation. The best-performance weight matrix (spectral filter) evolved from final network training and testing with software simulation trials is electronically transferred to a set of eight artificial intelligence integrated circuits (ICs’) in specific modular form (splitting of weight matrices). This form makes full use of all input–output IC nodes. This neural network computer serves an important real-time detection function when it is integrated into pre- and postprocessing data-handling units of a tactical prototype thermoluminescence sensor now under development at the Edgewood Research, Development, and Engineering Center.

© 1995 Optical Society of America

Full Article  |  PDF Article
More Like This
Hamilton neural-network model: recognition of the color patterns

Jianwei Shuai, Zhenxiang Chen, Ruitang Liu, and Boxi Wu
Appl. Opt. 34(29) 6764-6768 (1995)

Adaptive, optical, radial basis function neural network for handwritten digit recognition

Wesley E. Foor and Mark A. Neifeld
Appl. Opt. 34(32) 7545-7555 (1995)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (3)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved