Sho Takemori

Incorporating multi-level positive feedback to session-based nearest-neighbor

2021

User feedback such as clicks, likes and follows is widely considered positive signal, as users infer their preference through these signals. However, a click feedback that is intended for a purchase indicates that the user's …

Regional Expected Improvement for Efficient Trust Region Selection in High-Dimensional Bayesian Optimization

2025 · Proceedings of the AAAI Conference on Artificial Intelligence

Real-world optimization problems often involve complex objective functions with costly evaluations. While Bayesian optimization (BO) with Gaussian processes is effective for these challenges, it suffers in high-dimensional spaces due to performance degradation from limited function …