Expert Recommendation via Tensor Factorization with Regularizing Hierarchical Topical Relationships
This work addresses the challenge of knowledge acquisition for businesses and individuals by improving expert recommendation in question answering communities, but it appears incremental as it builds on existing tensor and matrix factorization techniques.
The paper tackles the problem of finding domain experts across multiple collaborative networks by proposing a framework that uses tensor factorization and matrix factorization to derive expertise scores from past voted posts. Experiments on Stack Exchange Networks demonstrate that the approach yields steady and premium outputs, though no concrete performance numbers are provided.
Knowledge acquisition and exchange are generally crucial yet costly for both businesses and individuals, especially when the knowledge concerns various areas. Question Answering Communities offer an opportunity for sharing knowledge at a low cost, where communities users, many of whom are domain experts, can potentially provide high-quality solutions to a given problem. In this paper, we propose a framework for finding experts across multiple collaborative networks. We employ the recent techniques of tree-guided learning (via tensor decomposition), and matrix factorization to explore user expertise from past voted posts. Tensor decomposition enables to leverage the latent expertise of users, and the posts and related tags help identify the related areas. The final result is an expertise score for every user on every knowledge area. We experiment on Stack Exchange Networks, a set of question answering websites on different topics with a huge group of users and posts. Experiments show our proposed approach produces steady and premium outputs.