title: Gene/protein name recognition based on support vector machine using dictionary as features.
abstract: BACKGROUND
  Automated information extraction from biomedical literature is important because a vast amount of biomedical literature has been published. Recognition of the biomedical named entities is the first step in information extraction. We developed an automated recognition system based on the SVM algorithm and evaluated it in Task 1.A of BioCreAtIvE, a competition for automated gene/protein name recognition.
  
  
  RESULTS
  In the work presented here, our recognition system uses the feature set of the word, the part-of-speech (POS), the orthography, the prefix, the suffix, and the preceding class. We call these features "internal resource features", i.e., features that can be found in the training data. Additionally, we consider the features of matching against dictionaries to be external resource features. We investigated and evaluated the effect of these features as well as the effect of tuning the parameters of the SVM algorithm. We found that the dictionary matching features contributed slightly to the improvement in the performance of the f-score. We attribute this to the possibility that the dictionary matching features might overlap with other features in the current multiple feature setting.
  
  
  CONCLUSIONS
  During SVM learning, each feature alone had a marginally positive effect on system performance. This supports the fact that the SVM algorithm is robust on the high dimensionality of the feature vector space and means that feature selection is not required.
authors.affiliation: Graduate School of Information Science, Nara Institute of Science and Technology, Nara, 630-0101, Japan. mitsumor@is.naist.jp
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Mitsumori
authors.forename: Sevrani
authors.initials: S
authors.lastname: Fation
authors.forename: Masaki
authors.initials: M
authors.lastname: Murata
authors.forename: Kouichi
authors.initials: K
authors.lastname: Doi
authors.forename: Hirohumi
authors.initials: H
authors.lastname: Doi
mesh_terms: D000465:Algorithms; D019295:Computational Biology / Q000379:methods*; D004014:Dictionaries as Topic; D005796:Genes; D010363:Pattern Recognition, Automated / Q000145:classification / Q000379:methods*; D011506:Proteins / Q000145:classification*; D021641:Recognition, Psychology
chemical_list: D011506:Proteins