Analysis and Research of Several Problems of Bad Short Message Filtering System

the spread of bad message seriously affects the social ethos and disrupt the normal life order of people. It has considerable practical value to research and develop the filtering technology of bad short message. Two problems in text classification are studied in this paper, which can be used in the bad short message filtering. The first is the application of clustering method to purify unreliable corpus. Experiment shows that the method is quite obvious on purification effect of unreliable data; the second is about a little improvement of word weight index IDF. Keywords-message filtration; unreliable corpus; vector space model; IDF