Persian Text Classification Enhancement by Latent Semantic Space
نویسندگان
1 M.S. in Computer Engineering, Senior expert staff of network engineer, Department of Information and Communication Technology Management, Regional Information Center for Science and Technology
2 Assistant Prof. in Computer Engineering, Research Department of Design and System Operations, Regional Information Center for Science and Technology
doi
چکیده
Heterogeneous data in all groups are growing on the web nowadays. Because of the variety of data types in the web search results, it is common to classify the results in order to find the preferred data. Many machine learning methods are used to classify textual data. The main challenges in data classification are the cost of classifier and performance of classification. A traditional model in IR and text data representation is the vector space model. In this representation cost of computations are dependent upon the dimension of the vector. Another problem is to select effective features and prune unwanted terms. Latent semantic indexing is used to transform VSM to orthogonal semantic space with term relation consideration. Experimental results showed that LSI semantic space can achieve better performance in computation time and classification accuracy. This result showed that semantic topic space has less noise so the accuracy will increase. Less vector dimension also reduces the computational complexity.
