TechRxiv is a very useful tool for exploratory search or idea generation type of activity. The wealth of subject headings that it shows for articles can be used for those types of activities, as shown in the screenshot of this example article. You need to create a free login account to use this service.
https://www.techrxiv.org/doi/full/10.36227/techrxiv.16444611.v2
#research $TechRxiv #AI #ML #computerScience #exploratorySearch #2ndOrderSearch