The goal of Mr Xue's research is to bridge large-scale constraint-based reasoning and optimization with state-of-the-art machine learning techniques in order to enable intelligent agents to make optimal decisions in high-dimensional and uncertain real-world applications. More specifically, Mr Xue's research focuses on scalable and accurate probabilistic reasoning techniques, statistical modeling of data, and robust decision-making under uncertainty. Mr. Xue's work is motivated by key problems across multiple scientific domains, ranging from artificial intelligence, machine learning, renewable energy, materials science, crowdsourcing, citizen science, urban computing, ecology, to behavioral econometrics. Mr. Xue focuses on developing cross-cutting computational methods, with an emphasis in the areas of computational sustainability and scientific discovery.