https://csrankings.org/#/fromyear/2011/toyear/2021/index?all&us
CSRanking好像是按照CS faculty pulication数量来排名的。UCSD也许是因为在AI, VIsion, MLP等领域publication比较多，而排在了#4.
This ranking is designed to identify institutions and faculty actively engaged in research across a number of areas of computer science, based on the number of publications by faculty that have appeared at the most selective conferences in each area of computer science (see the FAQ for more details).
