Temat: detection process - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Random projections and Hotelling’s T2 statistics for change detection in high-dimensional data streams
Autorzy:: Skubalska-Rafajłowicz, E.
Powiązania:: https://bibliotekanauki.pl/articles/331099.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: change detection
multidimensional control charts
dimensionality reduction
random projections
process monitoring
wykrywanie zmian
karta kontrolna
redukcja wymiarowości
monitorowanie procesu
Opis:: The method of change (or anomaly) detection in high-dimensional discrete-time processes using a multivariate Hotelling chart is presented. We use normal random projections as a method of dimensionality reduction. We indicate diagnostic properties of the Hotelling control chart applied to data projected onto a random subspace of Rn. We examine the random projection method using artificial noisy image sequences as examples.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2013, 23, 2; 447-461
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Nonlinear model predictive control of a boiler unit: a fault tolerant control study
Autorzy:: Patan, K.
Korbicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/331450.pdf
Data publikacji:: 2012
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: rekurencyjna sieć neuronowa
model procesu
sterowanie predykcyjne
detekcja uszkodzeń
zbiornik przepływowy
recurrent neural networks
process model
predictive control
fault detection
boiler unit
Opis:: This paper deals with a nonlinear model predictive control designed for a boiler unit. The predictive controller is realized by means of a recurrent neural network which acts as a one-step ahead predictor. Then, based on the neural predictor, the control law is derived solving an optimization problem. Fault tolerant properties of the proposed control system are also investigated. A set of eight faulty scenarios is prepared to verify the quality of the fault tolerant control. Based of different faulty situations, a fault compensation problem is also investigated. As the automatic control system can hide faults from being observed, the control system is equipped with a fault detection block. The fault detection module designed using the one-step ahead predictor and constant thresholds informs the user about any abnormal behaviour of the system even in the cases when faults are quickly and reliably compensated by the predictive controller.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2012, 22, 1; 225-237
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: A graph theory-based approach to the description of the process and the diagnostic system
Autorzy:: Kościelny, Jan Maciej
Bartyś, Michał
Syfert, Michał
Sztyber, Anna
Powiązania:: https://bibliotekanauki.pl/articles/2124778.pdf
Data publikacji:: 2022
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: graph of the process
graph of the diagnostic system
fault detection
fault isolation
qualitative model
limitations of diagnostic approaches
wykres procesu
system diagnostyczny
wykrywanie uszkodzeń
izolacja uszkodzeń
model jakościowy
Opis:: The paper proposes an original, comprehensive, and methodically consistent graph theory-based approach to the description of the diagnosed process and the diagnosing system. The main baseline of the presented approach is in the dichotomous approach to diagnosing. It involves a separate description of both the process and the diagnostic system. This approach reflects the practice of designing implementable diagnostic systems. Thus, it can be seen as a proposal of a new, alternative, and, at the same time, flexible design procedure with great potential for applications. The primary motivation behind it was an attempt to circumvent the numerous limitations of well-known and well-established diagnosis approaches proposed by the communities working on fault detection and isolation (FDI) and artificial intelligence theories for diagnosis (DX). Accordingly, the paper identifies and provides an extensive discussion and a critical analysis of the existing limitations. Numerous examples and references to practical applications of the approach are indicated.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2022, 32, 2; 213--227
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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