Multidimensional text classification for drug information.
This paper proposes a multidimensional model for classifying drug information text documents. The concept of multidimensional category model is introduced for representing classes. In contrast with traditional flat and hierarchical category models, the multidimensional category model classifies each document using multiple predefined sets of categories, where each set corresponds to a dimension. Since a multidimensional model can be converted to flat and hierarchical models, three classification approaches are possible, i.e., classifying directly based on the multidimensional model and classifying with the equivalent flat or hierarchical models. The efficiency of these three approaches is investigated using drug information collection with two different dimensions: 1) drug topics and 2) primary therapeutic classes. In the experiments, k-nearest neighbor, naive Bayes, and two centroid-based methods are selected as classifiers. The comparisons among three approaches of classification are done using two-way analysis of variance, followed by the Scheffé's test for post hoc comparison. The experimental results show that multidimensional-based classification performs better than the others, especially in the presence of a relatively small training set. As one application, a category-based search engine using the multidimensional category concept was developed to help users retrieve drug information.
Sirindhom International Institute of Technology, Bangkadi Campus, Thammasat University, Bangkadi, Pathumthani 12000, Thailand. verayuths@hotmail.com
Verayuth
V
Lertnattee
Thanaruk
T
Theeramunkong
D000043:Abstracting and Indexing / Q000379:methods*; D001185:Artificial Intelligence; D004282:Documentation / Q000379:methods*; D004346:Drug Information Services; D016247:Information Storage and Retrieval / Q000379:methods*; D020407:Internet; D009323:Natural Language Processing; D010363:Pattern Recognition, Automated; D010506:Periodicals as Topic; D004364:Pharmaceutical Preparations / Q000145:classification*; D018875:Vocabulary, Controlled
D004364:Pharmaceutical Preparations