Table 2 Stop words list in accident texts of subway construction.

From: Automatic construction of risk transmission network about subway construction based on deep learning models

The types of stop words

Specific stop words

Functional words

And, however, have been

Quantitative word

One, two, three

Degree words

Significant, very, obvious, complete, large scale

Words represent the change of state

Occurrence, initiation, existence, appearance, therefore

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