In October of 2015, a new algorithm was announced by members of the Google Brain team, described in this post from Search Engine Land – Meet RankBrain: The Artificial Intelligence That’s Now Processing Google Search Results One of the Google Brain team members who gave Bloomberg News a long interview on Rankbrain, Gregory S. Corrado was a co-inventor on a patent that was granted this August along with other members of the Google Brain team.
In the SEM Post article, RankBrain: Everything We Know About Google’s AI Algorithm we are told that Rankbrain uses concepts from Geoffrey Hinton, involving Thought Vectors. The summary in the description from the patent tells us about how a word vector approach might be used in such a system:
Particular embodiments of the subject matter described in this specification can be implemented so as to realize one or more of the following advantages. Unknown words in sequences of words can be effectively predicted if the surrounding words are known. Words surrounding a known word in a sequence of words can be effectively predicted. Numerical representations of words in a vocabulary of words can be easily and effectively generated. The numerical representations can reveal semantic and syntactic similarities and relationships between the words that they represent.