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Optimization of concrete structures using stochastic optimization methods
Slowik, Ondřej ; Pukl,, Radomír (referee) ; Novák, Drahomír (advisor)
The thesis focuses the reader on the sense of optimization and its importance for civil engineering. It outlines the principles used by some optimization methods and discusses the possibility of combination of any type of methods LHS with other optimization method. The result is a new type of optimization method named Nested LHS described in the text of the third chapter. The fifth chapter applies some of the lessons learned to solve practical optimization problem - reinforced concrete bridge solved by nonlinear finite element analysis using pseudostochastic optimization method LHS mean.
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Reliability-based structural optimization
Slowik, Ondřej ; Pukl, Radomír (referee) ; Novák, Drahomír (advisor)
This thesis presents the reader the importance of optimization and probabilistic assessment of structures for civil engineering problems. Chapter 2 further investigates the combination between previously proposed optimization techniques and probabilistic assessment in the form of optimization constraints. Academic software has been developed for the purposes of demonstrating the effectiveness of the suggested methods and their statistical testing. 3th chapter summarizes the results of testing previously described optimization method (called Aimed Multilevel Sampling), including a comparison with other optimization techniques. In the final part of the thesis, described procedures have been demonstrated on the selected optimization and reliability problems. The methods described in text represents engineering approach to optimization problems and aims to introduce a simple and transparent optimization algorithm, which could serve to the practical engineering purposes.
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Reliability-based structural optimization
Slowik, Ondřej ; Červenka,, Jan (referee) ; Lepš, Matěj (referee) ; Novák, Drahomír (advisor)
Presented PhD thesis deals with reliability-based optimization of structures and problems related to automatization of various algorithms of solution for various reliability-based optimization task definitions. The text presents a general definition of the reliability-based optimization problem, followed by a description of state of the art within the broad field of reliability-based optimization as well as the current state of the art of selected methodology utilized or developed by the author during his work in order to meet objectives of his dissertation. The theoretical part of the thesis is supplemented by a description of developed software tools and by examples of described methodology applications during a solution of practical problems of nonlinear numerical models reliability-based optimization and problems of inverse analysis.
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The noun phrase in the spoken and written academic monologue
Slówik, Ondřej ; Malá, Markéta (advisor) ; Šaldová, Pavlína (referee)
Noun phrase is the most versatile type of phrase in English both in terms of its syntactic function and its complexity. Syntactically, it can serve as the realization form of any clause element except for the finite clause predicate. It can only perform the predicative function in verbless clauses (e.g. The door!), which are generally rare and stylistically marked. As far as its internal structure is concerned, the noun phrase may comprise a single word (e.g. London, I) but its complexity may increase considerably due to extensive modification (e.g. the second stunningly beautiful lady from London who arrived yesterday) The aim of this B.A. thesis is the analysis of the noun phrase structure in written and spoken academic monologue. Its task will be to prove the assumption that although the number of noun phrases in written and spoken academic monologues do not differ significantly, their structure and complexity is different. Spoken and written English differ in many aspects. Written language is usually prepared in advance whereas spoken language is always partially impromptu even if it is planned ahead of time. Generally, some kinds of linguistic structures, including complex phrasal structures, are difficult to produce in real-time circumstances. A speaker would also place himself in a complicated...
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Tone realization differences in Hanoian and Saigonese dialects between reading and semi-spontaneous speech
Slówik, Ondřej ; Volín, Jan (advisor) ; Uher, David (referee) ; Skarnitzl, Radek (referee)
The chief objective of this dissertation is the description of tone realization differences in Hanoian and Saigonese dialects based on a representative sample of recorded material, with special focus on read monologue and semi-spontaneous conversational speech. The research discusses mainly issues of tone production but it is complemented by a section on tone perception in form of a perception test. The theoretical background in Section 2.1. describes the topic of tonality and tonal languages in general. Section 2.2. is devoted to the description of the Vietnamese language and attention is specifically paid to tonal inventories of both researched dialects. Tonogenesis is mentioned on a general level as well as in the Vietnamese language in particular. Chapter 3 introduces the research methodology, namely the speaker selection, speech material preparation and recording, data extraction and preparation for the analyses and the perception test. Chapter 4 is divided into three sections. Section 4.1. speaks about tone realizations in isolation and carefully preselected context. Its goal is to investigate the behaviour of tonal contours influenced by as few variables as possible. The results should be comparable to the findings of previously conducted studies. Section 4.2. strives to assess data from a...
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Rhythmic differences between Vietnamese English and the British standard
Slówik, Ondřej ; Volín, Jan (advisor) ; Klégr, Aleš (referee)
This thesis deals with rhythmic differences between Vietnamese English and the British Standard. As all the recorded speakers were originally from Northern Vietnam or lived there for an extensive period of time, it should be noted that the subject of analysis was in fact North Vietnamese English. The theoretical part describes the concept of rhythm in general and modern approaches to its analysing and measuring. Furthermore, the theoretical chapter describes the basics of phonetic characteristics of the Vietnamese language and the British standard of English. The last chapter of the theoretical part constitutes a bridge between theory and analysis as it explains selected features of Vietnamese English concerning mainly the realization of vowels and consonants. The next part is dedicated to methodology and it informs the reader about the criteria for selection of speakers and the means of gathering and processing material. At the end, a number of hypotheses regarding Vietnamese English are presented. In the analysis, values for rhythm metrics for Vietnamese English (%V, ΔV, ΔC, varcoV, varcoC, rPVI-V, rPVI-C, nPVI-V, nPVI-C) are calculated, compared to the rhythm metrics for British English and further evaluated in relation to gender, speakers and prosodic compactness. The results of the analysis...
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The noun phrase in the spoken and written academic monologue
Slówik, Ondřej ; Šaldová, Pavlína (referee) ; Malá, Markéta (advisor)
Noun phrase is the most versatile type of phrase in English both in terms of its syntactic function and its complexity. Syntactically, it can serve as the realization form of any clause element except for the finite clause predicate. It can only perform the predicative function in verbless clauses (e.g. The door!), which are generally rare and stylistically marked. As far as its internal structure is concerned, the noun phrase may comprise a single word (e.g. London, I) but its complexity may increase considerably due to extensive modification (e.g. the second stunningly beautiful lady from London who arrived yesterday) The aim of this B.A. thesis is the analysis of the noun phrase structure in written and spoken academic monologue. Its task will be to prove the assumption that although the number of noun phrases in written and spoken academic monologues do not differ significantly, their structure and complexity is different. Spoken and written English differ in many aspects. Written language is usually prepared in advance whereas spoken language is always partially impromptu even if it is planned ahead of time. Generally, some kinds of linguistic structures, including complex phrasal structures, are difficult to produce in real-time circumstances. A speaker would also place himself in a complicated...
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Optimization of concrete structures using stochastic optimization methods
Slowik, Ondřej ; Pukl,, Radomír (referee) ; Novák, Drahomír (advisor)
The thesis focuses the reader on the sense of optimization and its importance for civil engineering. It outlines the principles used by some optimization methods and discusses the possibility of combination of any type of methods LHS with other optimization method. The result is a new type of optimization method named Nested LHS described in the text of the third chapter. The fifth chapter applies some of the lessons learned to solve practical optimization problem - reinforced concrete bridge solved by nonlinear finite element analysis using pseudostochastic optimization method LHS mean.
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Reliability-based structural optimization
Slowik, Ondřej ; Pukl, Radomír (referee) ; Novák, Drahomír (advisor)
This thesis presents the reader the importance of optimization and probabilistic assessment of structures for civil engineering problems. Chapter 2 further investigates the combination between previously proposed optimization techniques and probabilistic assessment in the form of optimization constraints. Academic software has been developed for the purposes of demonstrating the effectiveness of the suggested methods and their statistical testing. 3th chapter summarizes the results of testing previously described optimization method (called Aimed Multilevel Sampling), including a comparison with other optimization techniques. In the final part of the thesis, described procedures have been demonstrated on the selected optimization and reliability problems. The methods described in text represents engineering approach to optimization problems and aims to introduce a simple and transparent optimization algorithm, which could serve to the practical engineering purposes.
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