|
|
Graph data analysis using deep learning methods
Vancák, Vladislav ; Svoboda, Martin (advisor) ; Majerech, Vladan (referee)
The goal of this thesis is to investigate the existing graph embedding methods. We aim to represent the nodes of undirected weighted graphs as low-dimensional vectors, also called embeddings, in order to create a rep- resentation suitable for various analytical tasks such as link prediction and clustering. We first introduce several contemporary approaches allowing to create such network embeddings. We then propose a set of modifications and improvements and assess the performance of the enhanced models. Finally, we present a set of evaluation metrics and use them to experimentally evalu- ate and compare the presented techniques on a series of tasks such as graph visualisation and graph reconstruction. 1
|
|
|
Dynamika fytoplanktonu kaprových rybníků
SVOBODA, Martin
The bachelor thesis deals with the dynamics of phytoplankton in the short-term time scale and compares it with the annual course of phytoplankton in two studied ponds. In August 2017, samples were taken from two ponds in South Bohemia, specifically from the Dehtář pond and the Kvítkovický pond in 5 respectively three depths. The phytoplankton biomass was determined microscopically. The short-term dynamics of the main phytoplankton groups is contained in graphs. Besides, a list of all designated cyanobacteria and algae species can be found here. The green algae of the genera Crucigenia, Coelastrum, and Oocystis had the highest representation on the Kvítkovice pond. The cyanobacterial concentration was low. The Dehtář pond is dominated by filamentous cyanobacteria of the genera Anabaena and Pseudanabaena, which formed an algal bloom. Chlorococcales dominated the lower water column. In my work, I have not seen diurnal migration of any taxonomic group of algae and cyanobacteria. Microcystis, as a dominant species in the Kvítkovický pond, did not record vertical migration, indicating enough nutrients in these eutrophic ponds. Thus, phytoplankton is apparently not forced to migrate for nutrients to the bottom, and light is a limiting factor in their life cycle in summer.
|
|
|
Discovering and Creating Relations among CSV Columns Using Linked Data Knowledge Bases
Brodec, Václav ; Nečaský, Martin (advisor) ; Svoboda, Martin (referee)
A large amount of data produced by governmental organizations is accessible in the form of tables encoded as CSV files. Semantic table interpretation (STI) strives to transform them into linked data in order to make them more useful. As significant portion of the tabular data is of statistical nature, and therefore comprises predominantly of numeric values, it is paramount to possess effective means for interpreting relations between the entities and their numeric properties as captured in the tables. As the current general-purpose STI tools infer the annotations of the columns almost exclusively from numeric objects of RDF triples already present in the linked data knowledge bases, they are unable to handle unknown input values. This leaves them with weak evidence for their suggestions. On the other hand, known techniques focusing on the numeric values also have their downsides. Either their background knowledge representation is built in a top-down manner from general knowledge bases, which do not reflect the domain of input and in turn do not contain the values in a recognizable form. Or they do not make use of context provided by the general STI tools. This causes them to mismatch annotations of columns consisting from similar values, but of entirely different meaning. This thesis addresses the...
|
|
|
Legacy in law of succession
Svoboda, Martin ; Frinta, Ondřej (advisor) ; Thöndel, Alexandr (referee)
The present thesis discusses the legislation of an ancient and new-old institute of inheritance law, legacy. Legacy was in the Czech legal environment in the 60's of the last century as a traditional institute of inheritance law, allowing the testator wide opportunities of acquiring his property mortis causa. With the effectiveness of the Civil Code No. 40/1964 Coll., that released its regulation, completely disappeared from the public's legal awareness. The topic of the legacy became recurrent in connection with the recodification of private law, because adoption of Civil Code No. 89/2012 Coll. caused a return of legacy to the Czech law. The specificity of the legacy is its disruption with universal succession, which is otherwise typical for inheritance law. The main objective of the thesis is to evaluate the legacy and to conclude about the quality of the current legislation and its usefulness for legal practice. The secondary objective is to acquaint readers with the legacy and define its position in the legal environment. For the interpretation is chosen a procedure that goes from general to specific, which corresponds to the content layout of the thesis. The first part of the thesis deals with an analysis of the legacy as a whole and its differentiation from classical inheritance as well as...
|
|
| |
|
|
Image of the Present time in cartoons and articles of Czech historical newspapers
Svoboda, Martin ; Teplá, Jana (advisor) ; Cebe, Jan (referee)
The present thesis called Image of the Present time in cartoons and articles of Czech historical newspapers deals with the image of future world as described in the Czech media after World War I. The theoretical part of the thesis contains description of the period between World War I. and World War II. and is focused on most important events in Europe and Czechoslovakia. Also there is presentation of media status in so-called "first Czechoslovak Republic". In second part of this work we will examine Vesmír magazine and Lidové Noviny newspapers in the period between years 1925 and 1930. We will run this process by combination of quantitative content analysis and qualitative content analysis. In the end of this thesis, we will try to make some evaluation based on the results of analysis.
|
|
|
Converting HTML product data to Linked Data
Kadleček, Rastislav ; Nečaský, Martin (advisor) ; Svoboda, Martin (referee)
In order to make a step towards the idea of the Semantic Web it is necessary to research ways how to retrieve semantic information from documents published on the current Web 2.0. As an answer to growing amount of data published in a form of relational tables, the Odalic system, based on the extended TableMiner+ Semantic Table Interpretation algorithm was introduced to provide a convenient way to semantize tabular data using knowledge base disambiguation process. The goal of this thesis is to propose an extended algorithm for the Odalic system, which would allow the system to gather semantic information for tabular data describing products from e-shops, which have very limited presence in the knowl- edge bases. This should be achieved by using a machine learning technique called classification. This thesis consists of several parts - obtaining and preprocessing of the product data from e-shops, evaluation of several classification algorithms in order to select the best-performing one, description of design and implementation of the extended Odalic algorithm, description of its integration into the Odalic system, evaluation of the improved algorithm using the obtained product data and semantization of the product data using the new Odalic algorithm. In the end, the results are concluded and possible...
|
|
|
Evolution Management in NoSQL Document Databases
Vavrek, Michal ; Holubová, Irena (advisor) ; Svoboda, Martin (referee)
NoSQL databases are widely used for many applications as a technology for data storage, and their usage and popularity rises. The first aim of the thesis is to research the existing approaches and technologies for schema evolution in NoSQL databases. Next, we introduce an approach for schema evolution in multi-model databases with a unified interface for the most common data models. The proposed approach is easy to use and covers the common migration scenarios. We have also implemented a prototype, optimized its read/write operations, and demonstrated its properties on real-world data. 1
|
|
|
Legacy in law of succession
Svoboda, Martin ; Frinta, Ondřej (referee)
The present thesis discusses the legislation of an ancient and new-old institute of inheritance law, legacy. Legacy was in the Czech legal environment in the 60's of the last century as a traditional institute of inheritance law, allowing the testator wide opportunities of acquiring his property mortis causa. With the effectiveness of the Civil Code No. 40/1964 Coll., that released its regulation, completely disappeared from the public's legal awareness. The topic of the legacy became recurrent in connection with the recodification of private law, because adoption of Civil Code No. 89/2012 Coll. caused a return of legacy to the Czech law. The specificity of the legacy is its disruption with universal succession, which is otherwise typical for inheritance law. The main objective of the thesis is to acquaint the reader with the legacy and define its position in the legal environment. For the interpretation is chosen a procedure that goes from general to specific, which corresponds to the content layout of the thesis. The first part of the thesis deals with an analysis of the legacy as a whole and its differentiation from classical inheritance as well as from the fideikomis as a command and donation in a case of death, with which it is easily interchangeable. This is followed by a historical...
|
|
| |
guest ::
RSS feed.