Search Results for author: Zichong Li

Found 5 papers, 2 papers with code

Adaptive Preference Scaling for Reinforcement Learning with Human Feedback

no code implementations4 Jun 2024 Ilgee Hong, Zichong Li, Alexander Bukharin, Yixiao Li, Haoming Jiang, Tianbao Yang, Tuo Zhao

By incorporating an adaptive scaling parameter into the loss for each pair, our method increases the flexibility of the reward function.

Score Matching-based Pseudolikelihood Estimation of Neural Marked Spatio-Temporal Point Process with Uncertainty Quantification

no code implementations25 Oct 2023 Zichong Li, Qunzhi Xu, Zhenghao Xu, Yajun Mei, Tuo Zhao, Hongyuan Zha

Specifically, our framework adopts a normalization-free objective by estimating the pseudolikelihood of marked STPPs through score-matching and offers uncertainty quantification for the predicted event time, location and mark by computing confidence regions over the generated samples.

Point Processes Uncertainty Quantification

Stochastic Inexact Augmented Lagrangian Method for Nonconvex Expectation Constrained Optimization

no code implementations19 Dec 2022 Zichong Li, Pin-Yu Chen, Sijia Liu, Songtao Lu, Yangyang Xu

In this paper, we design and analyze stochastic inexact augmented Lagrangian methods (Stoc-iALM) to solve problems involving a nonconvex composite (i. e. smooth+nonsmooth) objective and nonconvex smooth functional constraints.

Fairness

Transformer Hawkes Process

3 code implementations ICML 2020 Simiao Zuo, Haoming Jiang, Zichong Li, Tuo Zhao, Hongyuan Zha

Modern data acquisition routinely produce massive amounts of event sequence data in various domains, such as social media, healthcare, and financial markets.

Computational Efficiency Point Processes

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