Flexible modeling and control of capacitive-deionization processes through a linear-state-space dynamic Langmuir model

Abstract While black-box models such as neural networks have been powerful in many applications, direct physical modeling (white box) remains crucial in many fields where experimental data are difficult or time-consuming to obtain. Here, we demonstrate with an example from desalination by capacitive...

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Autores principales:	Johan Nordstrand, Joydeep Dutta
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/ad3c88181e5e4d8caf633788d310172c
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spelling	oai:doaj.org-article:ad3c88181e5e4d8caf633788d310172c2021-12-02T13:36:42ZFlexible modeling and control of capacitive-deionization processes through a linear-state-space dynamic Langmuir model10.1038/s41545-020-00094-y2059-7037https://doaj.org/article/ad3c88181e5e4d8caf633788d310172c2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41545-020-00094-yhttps://doaj.org/toc/2059-7037Abstract While black-box models such as neural networks have been powerful in many applications, direct physical modeling (white box) remains crucial in many fields where experimental data are difficult or time-consuming to obtain. Here, we demonstrate with an example from desalination by capacitive deionization (CDI), how an existing physical model could be strengthened by combining a general modeling framework with physical insights (gray box). Thus, a dynamic Langmuir (DL) model is extended to a linear-state-space DL model (LDL). Results obtained show the new LDL model could incorporate general structural and operational modes, including membrane CDI and constant-current operation. The formulation removes the need for direct measurements of detailed device properties without adding model complexity, and MATLAB code for automatically implementing the model is provided in the Supplementary Information. We conclude the new LDL model is widely applicable, offering great flexibility in calibration data, and enabling prediction over general operating modes.Johan NordstrandJoydeep DuttaNature PortfolioarticleWater supply for domestic and industrial purposesTD201-500ENnpj Clean Water, Vol 4, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Water supply for domestic and industrial purposes TD201-500
spellingShingle	Water supply for domestic and industrial purposes TD201-500 Johan Nordstrand Joydeep Dutta Flexible modeling and control of capacitive-deionization processes through a linear-state-space dynamic Langmuir model
description	Abstract While black-box models such as neural networks have been powerful in many applications, direct physical modeling (white box) remains crucial in many fields where experimental data are difficult or time-consuming to obtain. Here, we demonstrate with an example from desalination by capacitive deionization (CDI), how an existing physical model could be strengthened by combining a general modeling framework with physical insights (gray box). Thus, a dynamic Langmuir (DL) model is extended to a linear-state-space DL model (LDL). Results obtained show the new LDL model could incorporate general structural and operational modes, including membrane CDI and constant-current operation. The formulation removes the need for direct measurements of detailed device properties without adding model complexity, and MATLAB code for automatically implementing the model is provided in the Supplementary Information. We conclude the new LDL model is widely applicable, offering great flexibility in calibration data, and enabling prediction over general operating modes.
format	article
author	Johan Nordstrand Joydeep Dutta
author_facet	Johan Nordstrand Joydeep Dutta
author_sort	Johan Nordstrand
title	Flexible modeling and control of capacitive-deionization processes through a linear-state-space dynamic Langmuir model
title_short	Flexible modeling and control of capacitive-deionization processes through a linear-state-space dynamic Langmuir model
title_full	Flexible modeling and control of capacitive-deionization processes through a linear-state-space dynamic Langmuir model
title_fullStr	Flexible modeling and control of capacitive-deionization processes through a linear-state-space dynamic Langmuir model
title_full_unstemmed	Flexible modeling and control of capacitive-deionization processes through a linear-state-space dynamic Langmuir model
title_sort	flexible modeling and control of capacitive-deionization processes through a linear-state-space dynamic langmuir model
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/ad3c88181e5e4d8caf633788d310172c
work_keys_str_mv	AT johannordstrand flexiblemodelingandcontrolofcapacitivedeionizationprocessesthroughalinearstatespacedynamiclangmuirmodel AT joydeepdutta flexiblemodelingandcontrolofcapacitivedeionizationprocessesthroughalinearstatespacedynamiclangmuirmodel
_version_	1718392692900102144

Flexible modeling and control of capacitive-deionization processes through a linear-state-space dynamic Langmuir model

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