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Development of a mathematical model for the dynamic optimization of batch reactors, and MINLP synthesis of plug-flow reactors in complex networks
Marcel Ropotar, Zdravko Kravanja, 2007, original scientific article

Abstract: This paper describes the development of a robust and efficient reactor model suitable for representing batch and plugflow reactors (PFRs) in different applications. These would range from the nonlinear (NLP) dynamic optimization of a stand-alone batch reactor up to the mixed-integer nonlinear (MINLP) synthesis of a complex reactor network in overall process schemes. Different schemes for the Orthogonal Collocation on Finite Element (OCFE) and various model formulations, in the case of MINLP model, were studied in order to increase the robustness and efficiency of the model. A deterministic model for known kinetics was obtained for batch and PFR reactors and extended for uncertainties in process parameters and reaction kinetics when the kinetics is unknown. Different variations of the developed model were applied to certain problems, as examples. The first motivating example was the dynamic optimization of batch reactor and the second the MINLP synthesis of a process scheme for the production of allyl chloride. The NLP version of the model with moving finite elements was found to be the most efficient for representing a batch reactor in the dynamic optimization example, and PFR trains in the process synthesis example.
Keywords: batch reactor, orthogonal collocation, off-line optimization, on-line optimization, flexibility, uncertainty
Published: 31.05.2012; Views: 1444; Downloads: 34
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English Financial Loanwords in Slovenian Texts
Robert Gašpar, 2013, undergraduate thesis

Abstract: The diploma thesis focuses on financial loanwords used in Slovenian texts and the collocations in which they appear. The main source for the research was the internet. I used five corpora (two English and three Slovenian), where I searched for the terms. By comparing the use of the terms in Slovenian and English I focused on how the terms collocate in both languages. My goal was not only to find where the differences lie, but also what is common in both languages. I made a list of tables containing 43 terms some of which are used in both languages, whilst some are not. In the theoretical part of the thesis I discussed the linguistic theory connected with my research. Because my work deals with loanwords and their collocations, I dedicated a part of my thesis to their theoretical background. It is important for a translator to recognise them; otherwise the end result can be a bad translation. Terminology is an important area of the theoretical background for my research; therefore I also discussed the importance of terms, term creation, the analysis of terms, concepts, and the connection of translation and terminology. In the second part of the theoretical part of the thesis I discussed corpus theory and reference books. The main part of my graduation thesis is my research. I researched how selected financial loanwords and their original equivalents collocate in both languages and which are the most common collocations. This was done by using five different corpora. I discovered that some collocations are common in both languages, whilst some are not. The collocations are similar in many of the terms researched. Off course, there are differences. Some terms collocate just with verbs in one language, whilst in the other with nouns or adjectives as well. Nouns, adjectives, and verbs are the most common parts of speech found in collocations. In the last chapter I discuss my findings more thoroughly and precisely.
Keywords: loanword, collocation, term, corpus, dictionary, translation.
Published: 18.11.2013; Views: 1467; Downloads: 110
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