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Playing Gomoku with Neural Networks
Slávka, Michal ; Kolář, Martin (oponent) ; Hradiš, Michal (vedoucí práce)
This thesis explores the usage of AlphaZero algorithm for the game of Gomoku. AlphaZero is a reinforcement learning algorithm, which does not require any existing datasets and is able to improve only by using self-play. It uses a tree search for policy improvement, which is subsequently used for training. This approach was able to defeat the previous state of the art methods. Generating training data of high quality requires a lot of computationally expensive iterations, which makes them algorithm slow to train. Experiments show that the strength of the play is growing with each subsequent iteration, this might indicate that it still has room for improvement with more training and that it has not reached its full potential.
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Multilingual Open-Domain Question Answering
Slávka, Michal ; Dočekal, Martin (oponent) ; Fajčík, Martin (vedoucí práce)
This thesis explores automatic Multilingual Open-Domain Question Answering. In this work are proposed approaches to this less explored research area. More precisely, this work examines if: (i) utilization of an English system is sufficient, (ii) multilingual models can benefit from a translated question into other languages (iii) or avoiding translation is a better choice. English system based on the T5 model that uses a machine translation is compared to natively multilingual systems based on the multilingual MT5 model. The English system with machine translation only slightly outperforms its monolingual counterparts in multiple tasks. Compared to multilingual models, the English system was trained on a much larger dataset, but the results were comparable. This shows that the use of natively multilingual systems is a promising approach for future research. I also present a method of retrieving multilingual evidence using the BM25 ranking algorithm and compare it with English retrieval. The use of multilingual evidence seems to be beneficial and improves the performance of the systems.
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Multilingual Open-Domain Question Answering
Slávka, Michal ; Dočekal, Martin (oponent) ; Fajčík, Martin (vedoucí práce)
This thesis explores automatic Multilingual Open-Domain Question Answering. In this work are proposed approaches to this less explored research area. More precisely, this work examines if: (i) utilization of an English system is sufficient, (ii) multilingual models can benefit from a translated question into other languages (iii) or avoiding translation is a better choice. English system based on the T5 model that uses a machine translation is compared to natively multilingual systems based on the multilingual MT5 model. The English system with machine translation only slightly outperforms its monolingual counterparts in multiple tasks. Compared to multilingual models, the English system was trained on a much larger dataset, but the results were comparable. This shows that the use of natively multilingual systems is a promising approach for future research. I also present a method of retrieving multilingual evidence using the BM25 ranking algorithm and compare it with English retrieval. The use of multilingual evidence seems to be beneficial and improves the performance of the systems.
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Playing Gomoku with Neural Networks
Slávka, Michal ; Kolář, Martin (oponent) ; Hradiš, Michal (vedoucí práce)
This thesis explores the usage of AlphaZero algorithm for the game of Gomoku. AlphaZero is a reinforcement learning algorithm, which does not require any existing datasets and is able to improve only by using self-play. It uses a tree search for policy improvement, which is subsequently used for training. This approach was able to defeat the previous state of the art methods. Generating training data of high quality requires a lot of computationally expensive iterations, which makes them algorithm slow to train. Experiments show that the strength of the play is growing with each subsequent iteration, this might indicate that it still has room for improvement with more training and that it has not reached its full potential.
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