·2,447,543篇论文数据，部分数据来源于NoteExpress
It gets rid of the part that is not important according to the text characteristics and improves the speed of classification by using title and heading as source of reference.
其中根据文本特点，摒除信息量小的部分，将标题、首部等作为标引源，提高了分类速度。
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