Zobrazeno 1 - 10
of 241
pro vyhledávání: '"J. Oravec"'
Publikováno v:
Radioengineering, Vol 27, Iss 1, Pp 281-288 (2018)
This paper deals with topic of image encryption based on chaotic maps. A solution which has advantage of robustness against chosen-plaintext attacks is proposed. Permutations of image pixels are carried out in a way that enables operations on graysca
Externí odkaz:
https://doaj.org/article/2cc0bb24432d4bb582042adeb4c3c52d
Publikováno v:
Chemical Engineering Transactions, Vol 61 (2017)
The paper is devoted to advanced control of a tubular heat exchanger with focus to energy savings. The controlled tubular heat exchanger (HE) was used for petroleum pre-heating by hot water. The controlled output was the measured temperature of the p
Externí odkaz:
https://doaj.org/article/9b19b47322494762babe2fdcf0a51c95
Publikováno v:
Chemical Engineering Transactions, Vol 61 (2017)
The aim of this paper is to present robust model predictive control (MPC) with integral action to optimize control performance of heat exchangers selected from a network, in the presence of fouling. The robust MPC represents an advanced optimization-
Externí odkaz:
https://doaj.org/article/0cbee73506304457a1826d4050b776c8
Publikováno v:
Chemical Engineering Transactions, Vol 61 (2017)
This paper aims at showing the application of neural network predictive control (NNPC) to counter-current heat exchangers (HEs) in series for water savings. The controlled process unit is composed of five counter-current shell-and-tube heat exchanger
Externí odkaz:
https://doaj.org/article/8b1c21425b1044f8b436e4a583632ee8
Publikováno v:
Chemical Engineering Transactions, Vol 52 (2016)
This study investigates using of robust model based predictive control (MPC) algorithms for optimal operating of heat exchangers in series from the stability and economic viewpoints. For the advanced controller design, the influence of uncertain para
Externí odkaz:
https://doaj.org/article/5b4a3165d5c748a4b097684c7d891bd9
Publikováno v:
Chemical Engineering Transactions, Vol 45 (2015)
The paper is focused on advanced control of the heat exchanger network (HEN). The HEN is used for cooling petroleum produced by distillation. The alternative robust model predictive control (RMPC) strategy was implemented to find the optimal control
Externí odkaz:
https://doaj.org/article/ffa4c30690294bfabce9c228d555bee8
Publikováno v:
Chemical Engineering Transactions, Vol 43 (2015)
The concrete materials have to fulfill a lot of technical criteria before being built and used in the building structures depending on their application. In general, concrete is considered to be very stable and harmless material. However, due to vari
Externí odkaz:
https://doaj.org/article/8d797175b4334e4281e5daa7d6374e7b
Autor:
M. Bakošová, J. Oravec
Publikováno v:
Chemical Engineering Transactions, Vol 39 (2014)
The paper is focused on the case study of the advanced control of the heat exchanger network (HEN). The HEN is used for cooling petroleum produced by distillation. The robust model predictive control (RMPC) strategy is implemented to find the optimal
Externí odkaz:
https://doaj.org/article/244d2d8bdbd34b309b2446a6f300da60
Autor:
M. Bakosova, J. Oravec
Publikováno v:
Chemical Engineering Transactions, Vol 35 (2013)
Heat exchanger optimal operation represents challenging task from the control viewpoint because of the system nonlinearities, varying process parameters, internal and external disturbances and measurement noise. Various robust control strategies were
Externí odkaz:
https://doaj.org/article/afe803166bbb4f478948130668256ab0
Autor:
M. Bakošová, J. Oravec
Publikováno v:
Chemical Engineering Transactions, Vol 29 (2012)
The paper attempts to show that using the robust model-based predictive control (RMPC) strategy for control of thermal processes can lead to energy savings in comparison with classical control approaches. RMPC is applied for control of a tubular heat
Externí odkaz:
https://doaj.org/article/ada34da60b504951b2001d1e129e4619