每一位作家都有自己的写作风格，词语的使用方面会有很大的不同，根据文章中的虚词的使用情况，计算两篇文章的余弦值。检测两篇文章的相似度。-Every writer has their own style of writing aspect, the use of the words will be very different, according to the article in the function words usage, calculate the cosine of the two