Time-Sensitive Hashtag Frequency-Inverse Hashtag Ubiquity (THF-IHU) Algorithm for Hashtag Recommendation in Twitter

Hashtag recommendation is a challenging task for social networks, but there are not many works focusing on time-sensitive recommendations. This paper proposes an enhanced algorithm namely Time-Sensitive Hashtag Frequency-Inverse Hashtag Ubiquity (THF-IHU) for hashtag recommendation system in Twitter, which is based on Hashtag Frequency-Inverse Hashtag Ubiquity (HF-IHU) algorithm. The proposed algorithm integrates two main features: a time feature for altering weight, and the feature taken from the BM25 ranking function which adjusts weight based on documents’ length. The experimental result on a Twitter dataset shows that the enhanced algorithm outperforms the traditional algorithm by over 35 percent in terms of recall.