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Automated contract classification for portal HlidacSmluv.cz
Maroušek, Jakub ; Nečaský, Martin (advisor) ; Holub, Martin (referee)
The Contracts Register is a public database containing contracts concluded by public institutions. Due to the number of documents in the database, data analysis is proble- matic. The objective of this thesis is to find a machine learning approach for sorting the contracts into categories by their area of interest (real estate services, construction, etc.) and implement the approach for usage on the web portal Hlídač státu. A large number of categories and a lack of a tagged dataset of contracts complicate the solution. 1
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Environmental Impact Assessment of Manufacturing Abrasion Resistant Coatings with Magnetron Sputtering
Krobauer, Jakub ; Holub, Martin (referee) ; Kocmanová, Alena (advisor)
This thesis is focused on the environmental impact assesment of the manufacturing process of cutting tool coatings. Described are current environmental problems and duties of companies affecting the environment. There is a description of methods used in environmental management, one of which is the LCA method. This method is then used to compare environmental impacts of TiN and AlTiN coatings. The thesis describes manufacturing process of these coatings and evaluates environmental impacts for both coatings. These results are then compared and conclusions and recommendations are made.
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Potential of non-frequency ancillary services for a distribution system operator
Reiskup, Filip ; Holub, Martin (referee) ; Ptáček, Michal (advisor)
This thesis provides a basic overview of the ancillary services in a transmission system. It summarizes changes regarding the implementation of European directives SOGL and EBGL. It describes in detail a portfolio of non-frequency ancillary services used in the distribution systems. It evaluates the demand of E.ON distribution system potential for those services in particular locations. Practical part is focused on a potential of reactive power management in this distribution area. It evaluates reactive power flow into transmission system and indicates the most critical substations. This thesis also covers analysis of existing resources in this distribution area and assign their possible potential in reactive power management.
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Theory and practice of fault location on MV cable lines in E.ON distribution networks
Macků, Dominika ; Holub, Martin (referee) ; Orságová, Jaroslava (advisor)
This thesis gives an overview on the fault of high-voltage cable transmission lines in the distribution system of the E.ON company. The first part of this thesis introduces reader to the topic of cable transmission lines, types of commonly used cables and the most commonly occurring faults. In the second part of this thesis, the methods of locating faults in cable transmission lines by professional personnel are explained. The third part deals with the analysis of a group of chosen occurred faults. The final part focuses on the statistics of fault occurrence on South Moravian region from 1.1.2017 until 1.1.2019.
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Hybrid Deep Question Answering
Aghaebrahimian, Ahmad ; Holub, Martin (advisor) ; Kordik, Pavel (referee) ; Pecina, Pavel (referee)
Title: Hybrid Deep Question Answering Author: Ahmad Aghaebrahimian Institute: Institute of Formal and Applied Linguistics Supervisor: RNDr. Martin Holub, Ph.D., Institute of Formal and Applied Lin- guistics Abstract: As one of the oldest tasks of Natural Language Processing, Question Answering is one of the most exciting and challenging research areas with lots of scientific and commercial applications. Question Answering as a discipline in the conjunction of computer science, statistics, linguistics, and cognitive science is concerned with building systems that automatically retrieve answers to ques- tions posed by humans in a natural language. This doctoral dissertation presents the author's research carried out in this discipline. It highlights his studies and research toward a hybrid Question Answering system consisting of two engines for Question Answering over structured and unstructured data. The structured engine comprises a state-of-the-art Question Answering system based on knowl- edge graphs. The unstructured engine consists of a state-of-the-art sentence-level Question Answering system and a word-level Question Answering system with results near to human performance. This work introduces a new Question An- swering dataset for answering word- and sentence-level questions as well. Start- ing from a...
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Content classification in legal documents
Bečvarová, Lucia ; Žabokrtský, Zdeněk (advisor) ; Holub, Martin (referee)
This thesis presents an applied research for the needs of a company Datlowe, s.r.o. aimed at automatic processing of legal documents. The goal of the work is to design, implement and evaluate a classification module that is able to assign categories to the paragraphs of the documents. Several classification algorithms are used, evaluated and compared to each other to be consequently combined to obtain the best models. The outcome is a prediction module which was successfully integrated into the entire document processing system. Other contributions, along with the classification module, are the measurement of the inter-annotator agreement and introducing new set of features for classification.
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SVM classifiers and heuristics for feature selection
Krupka, Tomáš ; Holub, Martin (advisor) ; Kopa, Miloš (referee)
In machine learning applications with a large number of computer-generated features, a selection of just a subset of features is often desirable. The Recursive Feature Elimination (SVM-RFE) algorithm proposed by Guyon et al. (2002) employs the mechanism of selecting the features based on their contribution to an SVM model decision rule, and has proven a state-of-the-art performance on the Gene Selection for Cancer Classification task (Tan et al. (2010)). This thesis expands on that work, and proposes a novel modification of the SVM-RFE feature selection method called Evaluation-Based RFE (EB-RFE). This heuristic significantly improves the performance of the SVM classifier in comparison to the original SVM-RFE on the studied machine learning task. In addition to the performance gain, the proposed algorithm has also, in experimental use, proven to have two other desirable properties. Firstly, EB-RFE produces much smaller feature subsets than SVM-RFE, which leads to more compact models. Secondly, unlike SVM-RFE, the EB-RFE heuristic is easily scalable with the computational time well beyond the possibilities of current high-end consumer CPUs. Powered by TCPDF (www.tcpdf.org)
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Semantic information from FrameNet and the possibility of its transfer to Czech data
Limburská, Adéla ; Lopatková, Markéta (advisor) ; Holub, Martin (referee)
The thesis focuses on transferring FrameNet annotation from English to Czech and the possibilities of using the resulting data for automatic frame prediction in Czech. The first part, annotation transfer, has been performed in two ways. First, a parallel corpus of English sentences and their human created Czech translations (PCEDT) was used. Second, a much larger parallel corpus was created using ma- chine translation of FrameNet example sentences. This corpus was then used to transfer the annotation as well. The resulting data were partially evaluated and some of the automatically detectable errors were filtered out. Subsequently, the data were used as an input for two machine learning methods, decision trees and support vector machines. Since neither of the machine learning experiments brought impressive results, further manual correction of the data annotation was performed, which helped increase the accuracy of the prediction. However, as the accuracy reported in related papers is notably higher, the thesis also discusses dif- ferent approaches to feature selection and the possibility of further improvement of the prediction results using these methods. 1
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The Internet and Private International Law
Holub, Martin ; Pauknerová, Monika (advisor) ; Pfeiffer, Magdalena (referee)
The main focus of the thesis is the issue of determining jurisdiction in matters of tort, delict or quasi-delict with regard to the internet. The author finds that the general rules of determining jurisdiction are suitable for use even in disputes arising with connection to the internet. However, strict application of the aforementioned rules would lead to undesirable results. Therefore it is necessary to construe the general rules in such a way that takes into account the unique characteristics of the internet environment. Given the fact that courts are mainly responsible for the interpretation and application of the general rules, significant decisions of European and American courts are thoroughly analyzed. Even though the main focus of the thesis are the decisions of the courts, recent findings of jurisprudence and recommendations of the international bodies are taken into account as well. In the opening chapters, the unique characteristics of the internet and basic rules for determining the special jurisdiction are presented. Although the issue of determining jurisdiction in contracts is also mentioned in chapter 3, this topic exceeds the scope of this work and is discussed mainly in connection with the "targeting" criterion, which is also significant for out of contract issues. Chapters 4 and...
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