Off-Topic Detection of Business English Essay Based on Deep Learning Model

Figure 1

The structure of CNN. m represents the article. represents the parameter of Dirichlet distribution of the prior distribution of the topic distribution of each article. represents the parameter of Dirichlet distribution prior distribution of word distribution for each topic. represents the topic distribution of article m. represents the word distribution for the mth topic. N represents the total number of words in the article. represents the topic to which the nth word in the mth article belongs. stands for the nth word in the mth article.