关键词: 地震区域, 词频共现, Salton指数, 相关性

Abstract:

Correlations among earthquake areas reflect the regularity of earthquakes happening in certain areas. Looking for correlations among earthquakes can forecast the earthquake areas before the disaster comes. Based on DCHED (Database of Chinese Historical Earthquake Disasters), cooccurrence analysis model is established. Firstly, earthquake areas are divided according to the wellknown names. Secondly, the traditional Salton model is improved. And, based on the improved Salton index, a method of cooccurrence analysis is proposed in order to solve problems of correlations among earthquake areas. Finally, experiments are performed to prove that the improved Salton model can reflect correlations among earthquake areas more accurately.

Key words: earthquake areas;co-occurrence;Salton index;correlation