最近提出的利用互信息算法来计算词语权重，对细粒度情感分析是十分重要的一步。-Recently proposed mutual information algorithm to calculate the weight of the words, fine-grained sentiment analysis is a very important step.

极限学习机（Extreme Learning Machine, ELM）用来训练单隐藏层前馈神经网络（SLFN）与传统的SLFN训练算法不同，极限学习机随机选取输入层权重和隐藏层偏置，输出层权重通过激活函数函数，依据Moore-Penrose（MP）广义逆矩阵理论计算解析求出。(Extreme learning machine (ELM) is used to train single hidden layer feedforward neural network (SLFN). Differe