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Use of Sequential Pattern Mining in Google Analytics
Viskievič, Gergő ; Šabatka, Pavel (referee) ; Luhan, Jan (advisor)
The bachelor thesis focuses on the design and development of an algorithm for sequential pattern mining in Google Analytics 4 data. Presents and analyzes available algorithms for sequential pattern mining. Analyzes the data model and the use of Google Analytics 4. Based on the requirements of business processes, the algorithm is proposed suitable for the expected input data.
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Prediction of Values on a Time Line
Maršová, Eliška ; Bařina, David (referee) ; Zemčík, Pavel (advisor)
This work deals with the prediction of numerical series whose application is suitable for prediction of stock prices. They explain the procedures for analysis and works with price charts. Also explains the methods of machine learning. Knowledge is used to build a program that finds patterns in numerical series for estimation.
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Use of Sequential Pattern Mining in Google Analytics
Viskievič, Gergő ; Šabatka, Pavel (referee) ; Luhan, Jan (advisor)
The bachelor thesis focuses on the design and development of an algorithm for sequential pattern mining in Google Analytics 4 data. Presents and analyzes available algorithms for sequential pattern mining. Analyzes the data model and the use of Google Analytics 4. Based on the requirements of business processes, the algorithm is proposed suitable for the expected input data.
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Knowledge Extraction with BP-netwoks
Reitermanová, Zuzana
Title: Knowledge Extraction with BP-networks Author: Zuzana Reitermanová Department: Katedra softwarového inženýrství Supervisor: Doc. RNDr. Iveta Mrázová, CSc. Supervisor's e-mail address: mrazova@ksi.ms.mff.cuni.cz Abstract: Multi-layered neural networks of the back-propagation type are well known for their universal approximation capability. Already the stan- dard back-propagation training algorithm used for their adjustment provides often applicable results. However, efficient solutions to complex tasks cur- rently dealt with require a quick convergence and a transparent network structure. This supports both an improved generalization capability of the formed networks and an easier interpretation of their function later on. Var- ious techniques used to optimize the structure of the networks like learning with hints; pruning and sensitivity analysis are expected to impact a bet- ter generalization, too. One of the fast learning algorithms is the conjugate gradient method. In this thesis, we discuss, test and analyze the above-mentioned methods. Then, we derive a new technique combining together the advantages of them. The proposed algorithm is based on the rapid scaled conjugate gradient tech- nique. This classical method is enhanced with the enforcement of a transpar- ent internal knowledge...
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Social networks and data mining
Zvirinský, Peter ; Mrázová, Iveta (advisor) ; Neruda, Roman (referee)
Recent data mining methods represent modern approaches capable of analyzing large amounts of data and extracting meaningful and potentially useful information from it. In this work, we discuss all the essential steps of the data mining process - including data preparation, storage, cleaning, data analysis as well as visualization of the obtained results. In particular, this work is focused on the data available publicly from the Insolvency Register of the Czech Republic, that comprises all insolvency proceedings commenced after 1. January 2008 in the Czech Republic. With regard to the considered type of data, several data mining methods have been discussed, implemented, tested and evaluated. Among others, the studied techniques include Market Basket Analysis, Bayesian networks and social network analysis. The obtained results reveal several social patterns common in the current Czech society.
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Ontology Enrichment Based on Unstructured Text Data
Lukšová, Ivana ; Nečaský, Martin (advisor) ; Kozák, Jakub (referee)
Title: Ontology Enrichment Based on Unstructured Text Data Author: Ivana Lukšová Department: Department of Software Engineering Supervisor: Mgr. Martin Nečaský, Ph.D., Department of Software Engi- neering Abstract: Semantic annotation, attaching semantic information to text data, is a fundamental task in the knowledge extraction. Several ontology-based semantic annotation platforms have been proposed in recent years. However, the process of automated ontology engineering is still a challenging problem. In this paper, a new semi-automatic method for ontology enrichment based on unstructured text is presented to facilitate this process. NLP and ma- chined learning methods are employed to extract new ontological elements, such as concepts and relations, from text. Our method achieves F-measure up to 71% for concepts extraction and up to 68% for relations extraction. Keywords: ontology, machine learning, knowledge extraction 1
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Knowledge Extraction with BP-netwoks
Reitermanová, Zuzana
Title: Knowledge Extraction with BP-networks Author: Zuzana Reitermanová Department: Katedra softwarového inženýrství Supervisor: Doc. RNDr. Iveta Mrázová, CSc. Supervisor's e-mail address: mrazova@ksi.ms.mff.cuni.cz Abstract: Multi-layered neural networks of the back-propagation type are well known for their universal approximation capability. Already the stan- dard back-propagation training algorithm used for their adjustment provides often applicable results. However, efficient solutions to complex tasks cur- rently dealt with require a quick convergence and a transparent network structure. This supports both an improved generalization capability of the formed networks and an easier interpretation of their function later on. Var- ious techniques used to optimize the structure of the networks like learning with hints; pruning and sensitivity analysis are expected to impact a bet- ter generalization, too. One of the fast learning algorithms is the conjugate gradient method. In this thesis, we discuss, test and analyze the above-mentioned methods. Then, we derive a new technique combining together the advantages of them. The proposed algorithm is based on the rapid scaled conjugate gradient tech- nique. This classical method is enhanced with the enforcement of a transpar- ent internal knowledge...
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Prediction of Values on a Time Line
Maršová, Eliška ; Bařina, David (referee) ; Zemčík, Pavel (advisor)
This work deals with the prediction of numerical series whose application is suitable for prediction of stock prices. They explain the procedures for analysis and works with price charts. Also explains the methods of machine learning. Knowledge is used to build a program that finds patterns in numerical series for estimation.
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Extraction of unspecified relations from the web
Ovečka, Marek ; Svátek, Vojtěch (advisor) ; Labský, Martin (referee)
The subject of this thesis is non-specific knowledge extraction from the web. In recent years, tools that improve the results of this type of knowledge extraction were created. The aim of this thesis is to become familiar with these tools, test and propose the use of results. In this thesis these tools are described and compared and extraction is carried out using OLLIE. Based on the results of the extractions, two methods of enriching extractions using name entity recognition, are proposed. The first method proposes to modify the weights of extractions and second proposes the enrichment of extractions by named entities. The paper proposed ontology, which allows to capture the structure of enriched extractions. In the last part practical experiment is carried out, in which the proposed methods are demonstrated. Future research in this field would be useful in areas of extraction and categorization of relational phrases.
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