4 papers
Which Model Is Actually Serving You? IRIS: Budgeted Black-Box Auditing of Model Substitution and Routing Dilution in LLM Gateways
Yuewei Zhang, Zhi-Hai Zhang, Hanzhang Qin
Commercial LLM gateways mediate access to hosted models, but the served backend may not match the advertised one: it may substitute a cheaper model on every request or route only a…
Solving contextual chance-constrained programming under decision-dependent uncertainty
Xiangting Liu, Shengran Wang, Kaile Yan +1
We study contextual chance-constrained programming under decision-dependent uncertainty. In this setting, a decision not only needs to satisfy constraints but also alters the distr…
Generalizing Few Data to Unseen Domains Flexibly Based on Label Smoothing Integrated with Distributionally Robust Optimization
Yangdi Wang, Zhi-Hai Zhang, Su Xiu Xu +1
Overfitting commonly occurs when applying deep neural networks (DNNs) on small-scale datasets, where DNNs do not generalize well from existing data to unseen data. The main reason…
Achieving Robust Data-driven Contextual Decision Making in a Data Augmentation Way
Zhaoen Li, Maoqi Liu, Zhi-Hai Zhang
This paper focuses on the contextual optimization problem where a decision is subject to some uncertain parameters and covariates that have some predictive power on those parameter…