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Some aspects of adaptive logic for pattern recognition

Cheung-Yueng-San, C. Y. E. (1973) Some aspects of adaptive logic for pattern recognition. Doctor of Philosophy (PhD) thesis, University of Kent. (doi:10.22024/UniKent/01.02.94269) (KAR id:94269)


This thesis deals with pattern recognizers (PRs) which are adaptive and amenable to hardware realization. Such PRs consist of networks of microcircuit modules (SLAMs: Stored-Logic Adaptive Microcircuits) which are used as feature extractors and which ensure a high throughput by their parallel operation.

Previous workers have adopted the. number of training patterns as a measure for training such PRs on different pattern classes. In this thesis, the number of memory bits set in the SLAMs is considered instead, and this is shown to provide a better balance between sections of the PRs called discriminators.

Simulations are carried out to observe how the size of the PR and the amount of training affect the performance and a quantitative comparison with a template matching classifier is presented. The effect of clustering the SLAM inputs within the input matrix is also investigated and PRs with SLAMs which have their outputs weighted according to their memory contents are also simulated.

From the results, a technique to optimize the performance of the PRs is proposed and a possible development of the SLAM module is suggested.

Item Type: Thesis (Doctor of Philosophy (PhD))
DOI/Identification number: 10.22024/UniKent/01.02.94269
Additional information: This thesis has been digitised by EThOS, the British Library digitisation service, for purposes of preservation and dissemination. It was uploaded to KAR on 25 April 2022 in order to hold its content and record within University of Kent systems. It is available Open Access using a Creative Commons Attribution, Non-commercial, No Derivatives ( licence so that the thesis and its author, can benefit from opportunities for increased readership and citation. This was done in line with University of Kent policies ( If you feel that your rights are compromised by open access to this thesis, or if you would like more information about its availability, please contact us at and we will seriously consider your claim under the terms of our Take-Down Policy (
Subjects: Q Science > QA Mathematics (inc Computing science) > QA 75 Electronic computers. Computer science
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Computing
SWORD Depositor: SWORD Copy
Depositing User: SWORD Copy
Date Deposited: 14 Jul 2023 10:12 UTC
Last Modified: 14 Jul 2023 10:12 UTC
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