A Multimodal Retrieval and Ranking Method for Scientific Documents Based on HFS and XLNet

Table 2

The context of two expressions and the corresponding keywords.

No.	Filename	Expression	Preceding paragraphs	Following paragraphs	Keywords
1	Quadratic formula		The general quadratic equation is	One can verify that the quadratic formula satisfies the quadratic equation by inserting the former into the latter.	Quadratic formula, quadratic equation
2	Gaussian function		In mathematics, a Gaussian function, often simply referred to as a Gaussian, is a function of the form:	For arbitrary real constants, and it is named after the mathematician Carl Friedrich Gauss.	Gaussian function, Gaussian