Intelligent control of a pH process

Abstract

A new strategy, to augment the pH process control is offered in this paper. The intelligent controller proposed herein is based on an inverse neural plant model. An integration term is introduced to improve the pure inverse neural controller performance. This element, adjusted by a fuzzy system with respect to the control error, operates in parallel with the neural controller to ensure offset-free performance, in case of system uncertainties or modelling mismatch. Four fuzzy rules were applied to generate the integrator parameters. Experimental results, carried out under pH control on a laboratory scale set-up, demonstrate the feasibility of the proposed control system.

Hidden Cosmic-Ray Accelerators as an Origin of TeV-PeV Cosmic Neutrinos

“…Their energy budget may be comparable to that of classical GRBs, so it is possible that they have a significant contribution to the diffuse neutrino flux [60,61]. Theoretically, lower-power jets are more difficult to penetrate the progenitor, so it is natural to expect "choked jets" [95]. Although too powerful jets lead to radiation-mediated shocks and do not allow efficient CR acceleration, since all protons can be depleted for meson production, choked GRB jets can account for the IceCube data [11,21,[62][63][64].…”

Constraining high-energy neutrinos from choked-jet supernovae with IceCube high-energy starting events

“…The recent discoveries of high-energy cosmic neutrinos [1,2] and gravitational waves [3,4] have opened the new era of multi-messenger astroparticle physics. Powerful explosive phenomena such as gamma-ray bursts (GRBs) and supernovae (SNe), including low-luminosity GRBs and transrelativistic SNe, are among the candidate sources of IceCube neutrinos [5][6][7][8][9], and expected to have bright electromagnetic counterparts at different wavelengths. In particular, gamma-ray emission of long-duration GRBs is thought to originate from relativistic jets launched at the death of massive stars.…”

“…However, the electromagnetic emission cannot be directly observed if it is choked. High-energy neutrino observations provide a unique opportunity to probe the choked jet hidden inside a star [6,[19][20][21], and enable us to study particle acceleration mechanisms in a photon-rich environment [22]. In addition, not only the jet emission but also subsequent shock breakout emission may lead to high-energy neutrino and gamma-ray signatures in the presence of a dense circumstellar material [23][24][25][26].…”

Process integration, modelling and optimisation for energy saving and pollution reduction

“…Touš et al [171] presented an alternative solution and optimisation to an integrated system of biomass and/or alternative fuel integrated into a complex energy producing system. Meszaros and Čirka [172] performed a control analysis with inner recycle ob hybrid separation process. Friedler, Varbanov and Klemeš [173] developed a methodology for optimising the HEN design for Multi-Operation Using PGraphs.…”