• Annual Conference on Human and Language Technology
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• 2002.10e
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• pp.300-305
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• 2002

자동 문서 요약 분야에서 대상 문서를 컴퓨터가 이해할 수 있는 형태로 어떻게 파악하고 구조화할 것인가는 중요한 이슈가 되어 왔다. 문서에 출현한 단어들은 Bag of Words 가정처럼 서로 독립적으로 존재하는 것이 아니라 문서가 쓰여진 의도에 따라 서로 간의 의미적, 혹은 지시적으로 연관되어 있다. 이러한 단어간의 연관성은 결속성(cohesion)이라고 표현하며, 이를 이용한 자동 방법으로 Barzilay의 어휘 체인(lexical chain)을 사용한 자동 방법이 대표적이다. 본 연구에서는 단어간의 연관성과 영문 시소러스인 워드넷(wordnet)에서 단어의 위치 정보를 사용하여 어휘 체인의 성능을 개선하였고, 대상 문서의 개념을 어휘 체인에 기반해 표현하여 자동의 성능을 개선하는 방안을 제시한다.

• The Journal of the Korea Contents Association
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• v.8 no.1
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• pp.282-289
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• 2008

Although there were some technological developments in improving the collaborative filtering, they have yet to fully reflect the actual relation of the items. In this paper, we propose the recommendation system using associative web document classification by word frequency and ${\alpha}$-cut to address the short comings of the collaborative filtering. The proposed method extracts words from web documents through the morpheme analysis and accumulates the weight of term frequency. It makes associative rules and applies the weight of term frequency to its confidence by using Apriori algorithm. And it calculates the similarity among the words using the hypergraph partition. Lastly, it classifies related web document by using ${\alpha}$-cut and calculates similarity by using adjusted cosine similarity. The results show that the proposed method significantly outperforms the existing methods.

• Annual Conference on Human and Language Technology
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• 2013.10a
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• pp.133-136
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• 2013

근래 트위터와 페이스북 등의 SNS(Social Network Service)에서 일반 대중의 관심사나 트렌드 등의 이슈를 탐지하는 많은 연구가 이루어지고 있다. 본 논문에서는 검색어에 대한 연관 어휘 추출을 통해 검색어에 연관된 이슈나 화제를 트위터에서 추출하기 위한 방법을 제안한다. 본 논문에서는 연관성이 높은 단어는 서로 가깝게 발생할 것으로 기대하고, 단어 간 거리가 가까울수록, 공기빈도가 높을수록 커지는 단어연관도 계산법을 제안한다. 연관도 값이 임계치를 넘는 어휘를 연관 어휘로 보고 네트워크의 형태로 관련 이슈를 제시한다.

• Journal of Korea Multimedia Society
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• v.4 no.2
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• pp.171-181
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• 2001

The previous Bayesian document categorization method has problems that it requires a lot of time and effort in word clustering and it hardly reflects the semantic information between words. In this paper, we propose a weighted Bayesian document categorizing method based on association word knowledge base acquired by mining technique. The proposed method constructs weighted association word knowledge base using documents in training set. Then, classifier using Bayesian probability categorizes documents based on the constructed association word knowledge base. In order to evaluate performance of the proposed method, we compare our experimental results with those of weighted Bayesian document categorizing method using vocabulary dictionary by mutual information, weighted Bayesian document categorizing method, and simple Bayesian document categorizing method. The experimental result shows that weighted Bayesian categorizing method using association word knowledge base has improved performance 0.87% and 2.77% and 5.09% over weighted Bayesian categorizing method using vocabulary dictionary by mutual information and weighted Bayesian method and simple Bayesian method, respectively.

• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.4
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• pp.405-412
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• 2019

SOLAS requires that ECDIS be installed on ships of more than 500 gross tonnage engaged in international navigation until the first inspection arriving after July 1, 2018. Several accidents related to the use of ECDIS have occurred with its installation as a new major navigation instrument. The 12 incident reports issued by MAIB, BSU, BEAmer, DMAIB, and DSB were analyzed, and the cause of accident was determined to be related to the operation of the navigator and the ECDIS system. The text was analyzed using the R-program to quantitatively analyze words related to the cause of the accident. We used text mining techniques such as Wordcloud, Wordnetwork and Wordweight to represent the importance of words according to their frequency of derivation. Wordcloud uses the N-gram model as a way of expressing the frequency of used words in cloud form. As a result of the uni-gram analysis of the N-gram model, ECDIS words were obtained the most, and the bi-gram analysis results showed that the word "Safety Contour" was used most frequently. Based on the bi-gram analysis, the causative words are classified into the officer and the ECDIS system, and the related words are represented by Wordnetwork. Finally, the related words with the of icer and the ECDIS system were composed of word corpus, and Wordweight was applied to analyze the change in corpus frequency by year. As a result of analyzing the tendency of corpus variation with the trend line graph, more recently, the corpus of the officer has decreased, and conversely, the corpus of the ECDIS system is gradually increasing.

• Journal of Practical Engineering Education
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• v.15 no.2
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• pp.509-517
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• 2023

The reactive web service provides a related word recommendation system using the TextRank algorithm and a word-based idea generation service selected by the user. In the related word recommendation system, the method of weighting each word using the TextRank algorithm and the probability output method using SoftMax are discussed. The idea generation service discusses the idea generation method and the artificial intelligence reinforce-learning method using mini-GPT. The reactive web discusses the linkage process between React, Spring Boot, and Flask, and describes the overall operation method. When the user enters the desired topic, it provides the associated word. The user constructs a mind map by selecting a related word or adding a desired word. When a user selects a word to combine from a constructed mind-map, it provides newly generated ideas and related patents. This web service can share generated ideas with other users, and improves artificial intelligence by receiving user feedback as a horoscope.

• Journal of KIISE:Computing Practices and Letters
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• v.16 no.12
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• pp.1254-1258
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• 2010

In information retrieval, different surface forms of the same object can cause poor performance of systems. In this paper, we propose the method extracting alternative words using translation words as features of each word extracted from parallel corpus, korean/english title pair of patent information. Also, we propose an association word filtering method to remove association words from an alternative word list. Evaluation results show that the proposed method outperforms other alternative word extraction methods.

• Journal of KIISE:Software and Applications
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• v.36 no.10
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• pp.861-873
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• 2009

There are many reasons that fail to get appropriate information in information retrieval. Allomorph is one of the reasons for search failure due to keyword mismatch. This research proposes a method to construct alternative word candidates automatically in order to minimize search failure due to keyword mismatch. Assuming that two words have similar meaning if they have similar co-occurrence words, the proposed method uses the concept of concentration, association word set, cosine similarity between association word sets and a filtering technique using confidence. Performance of the proposed method is evaluated using a manually extracted alternative list. Evaluation results show that the proposed method outperforms the context window overlapping in precision and recall.

• The Korean Journal of Applied Statistics
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• v.35 no.6
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• pp.739-754
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• 2022

Usually, text data consists of many variables, and some of them are closely correlated. Such multi-collinearity often results in inefficient or inaccurate statistical analysis. For supervised learning, one can select features by examining the relationship between target variables and explanatory variables. On the other hand, for unsupervised learning, since target variables are absent, one cannot use such a feature selection procedure as in supervised learning. In this study, we propose a word selection procedure that employs topic models to find latent topics. We substitute topics for the target variables and select terms which show high relevance for each topic. Applying the procedure to real data, we found that the proposed word selection procedure can give clear topic interpretation by removing high-frequency words prevalent in various topics. In addition, we observed that, by applying the selected variables to the classifiers such as naïve Bayes classifiers and support vector machines, the proposed feature selection procedure gives results comparable to those obtained by using class label information.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06c
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• pp.262-267
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• 2008

본 논문에서는 문서 내에서 동시에 출현하는 단어 쌍을 자질 추출 단위로 하는 문서 범주화 시스템에 대하여 기술한다. 자질 추출 단위를 단어 쌍으로 정의한 것은 문서에서 빈번하게 동시에 출현하는 단어들은 서로 연관관계가 높으며, 단어 하나보다는 연관관계가 높은 단어들의 쌍이 특정 범주의 문서에서만 나타날 확률이 높아지므로 문서 분류 능력을 높이는데 좋은 요인으로 작용할 수 있을 것이라는 가정 때문이다. 그리고 문서 요약 분야에서 제안된 Log-likelihood Ratio를 기반으로 하는 Topic Signature Term Extraction 방법을 사용하여 자질 추출을 하고, Naive Bayes 분류기를 이용하여 문서를 분류한다. 본 연구는 Reuters-21578 문서 집합을 이용한 성능평가에서 좋은 결과를 보였으며, 이는 앞으로의 연구에도 기여할 수 있을 것이라 기대한다.