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Hierarchical compression
Kreibichová, Lenka ; Lánský, Jan (advisor) ; Dvořák, Tomáš (referee)
The most of existing text compression methods is based on the same base concept. First the Input text is divided into sequence of text units. These text units cat be single symbols, syllables or words. When compressing large text files, searching for redundancies over longer text units is usually more effective than searching over the shorter ones. But if we choose words as base units we cannot anymore catch redundancies over symbols and syllables. In this paper we propose a new text compression method called Hierarchical compresssion. It constructs hierarchical grammar to store redundancies over syllables, words and upper levels of text. The code of the text then consists of code of this grammer. We proposed a strategy for constructing hierarchical grammar for concrete input text and we proposed an effective way how to encode it. Above mentioned our proposed method is compared with some other common methods of text compression.
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Chemical laboratory
Kreibichová, Lenka ; Zavoral, Filip (advisor) ; Kalibera, Tomáš (referee)
The subject of this work is to implement the simulation of chemistry laboratory. The result is speciffied for user, who would like to test, how it works in a chemistry laboratory without entering the real room. In the virtual laboratory you can use test tubes and řasks of various shape, insert chemical matters, warm and old them, mix the contents of the flasks and watch the reactions. The important merit is the ability to set the series of instructions, that interactive help user to go through the chemical experiment.
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Hierarchical compression
Kreibichová, Lenka ; Lánský, Jan (advisor) ; Dvořák, Tomáš (referee)
The most of existing text compression methods is based on the same base concept. First the Input text is divided into sequence of text units. These text units cat be single symbols, syllables or words. When compressing large text files, searching for redundancies over longer text units is usually more effective than searching over the shorter ones. But if we choose words as base units we cannot anymore catch redundancies over symbols and syllables. In this paper we propose a new text compression method called Hierarchical compresssion. It constructs hierarchical grammar to store redundancies over syllables, words and upper levels of text. The code of the text then consists of code of this grammer. We proposed a strategy for constructing hierarchical grammar for concrete input text and we proposed an effective way how to encode it. Above mentioned our proposed method is compared with some other common methods of text compression.
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|
|
Chemical laboratory
Kreibichová, Lenka ; Kalibera, Tomáš (referee) ; Zavoral, Filip (advisor)
The subject of this work is to implement the simulation of chemistry laboratory. The result is speciffied for user, who would like to test, how it works in a chemistry laboratory without entering the real room. In the virtual laboratory you can use test tubes and řasks of various shape, insert chemical matters, warm and old them, mix the contents of the flasks and watch the reactions. The important merit is the ability to set the series of instructions, that interactive help user to go through the chemical experiment.
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