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不完备信息系统中知识获取算法 被引量:4
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作者 顾沈明 吴伟志 高济 《计算机科学》 CSCD 北大核心 2005年第9期149-152,共4页
粗糙集理论是一种新的处理模糊和不确定知识的软计算工具。应用粗糙集理论,可以将隐藏在系统的知识能够以决策规则的形式表达出来。根据粗糙集上下近似的概念,决策规则能够分成确定性规则和可能性规则两种。本文将介绍从不完备信息系统... 粗糙集理论是一种新的处理模糊和不确定知识的软计算工具。应用粗糙集理论,可以将隐藏在系统的知识能够以决策规则的形式表达出来。根据粗糙集上下近似的概念,决策规则能够分成确定性规则和可能性规则两种。本文将介绍从不完备信息系统中知识获取的算法,通过这些算法能够从不完备决策表中生成一种确定性的规则和两种可能性的规则,同时也介绍了不完备决策表中描述约简的算法。 展开更多
关键词 不完备信息系统 粗糙集算法 决策规则 确定性 决策表 软计算工具
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Software Tools for Some Natural Language Texts Computer Processing
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作者 Jemal Antidze Nana Gulua 《Computer Technology and Application》 2012年第3期219-225,共7页
Software tools are developed for computer realization of syntactic, semantic, and morphological models of natural language texts, using rule based programming. The tools are efficient for a language, which has free or... Software tools are developed for computer realization of syntactic, semantic, and morphological models of natural language texts, using rule based programming. The tools are efficient for a language, which has free order of words and developed morphological structure like Georgian. For instance, a Georgian verb has several thousand verb-forms. It is very difficult to express rules of morphological analysis by finite automaton and it will be inefficient as well. Resolution of some problems of full morphological analysis of Georgian words is impossible by finite automaton. Splitting of some Georgian verb-forms into morphemes requires non-deterministic search algorithm, which needs many backtrackings. To minimize backtrackings, it is necessary to put constraints, which exist among morphemes and verify them as soon as possible to avoid false directions of search. Software tool for syntactic analysis has means to reduce rules, which have the same members in different order. The authors used the tool for semantic analysis as well. Thus, proposed software tools have many means to construct efficient parser, test and correct it. The authors realized morphological and syntactic analysis of Georgian texts by these tools. In the presented paper, the authors describe the software tools and its application for Georgian language. 展开更多
关键词 Software tools parsing algorithm BACKTRACKING syntactic analyzer constraints.
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