Search Results for author: Jiaming Liang

Found 14 papers, 1 papers with code

Proximal Oracles for Optimization and Sampling

no code implementations2 Apr 2024 Jiaming Liang, Yongxin Chen

Finally, we combine this proximal sampling oracle and ASF to obtain a Markov chain Monte Carlo method with non-asymptotic complexity bounds for sampling in semi-smooth and composite settings.

Benchmarking the Robustness of Temporal Action Detection Models Against Temporal Corruptions

no code implementations29 Mar 2024 Runhao Zeng, Xiaoyong Chen, Jiaming Liang, Huisi Wu, Guangzhong Cao, Yong Guo

In this paper, we extensively analyze the robustness of seven leading TAD methods and obtain some interesting findings: 1) Existing methods are particularly vulnerable to temporal corruptions, and end-to-end methods are often more susceptible than those with a pre-trained feature extractor; 2) Vulnerability mainly comes from localization error rather than classification error; 3) When corruptions occur in the middle of an action instance, TAD models tend to yield the largest performance drop.

Action Detection Benchmarking

On Independent Samples Along the Langevin Diffusion and the Unadjusted Langevin Algorithm

no code implementations26 Feb 2024 Jiaming Liang, Siddharth Mitra, Andre Wibisono

We study the rate at which the initial and current random variables become independent along a Markov chain, focusing on the Langevin diffusion in continuous time and the Unadjusted Langevin Algorithm (ULA) in discrete time.

Variance Reduction and Low Sample Complexity in Stochastic Optimization via Proximal Point Method

no code implementations14 Feb 2024 Jiaming Liang

This paper proposes a stochastic proximal point method to solve a stochastic convex composite optimization problem.

Stochastic Optimization

GreatSplicing: A Semantically Rich Splicing Dataset

no code implementations16 Oct 2023 Xiuli Bi, Jiaming Liang

In existing splicing forgery datasets, the insufficient semantic varieties of spliced regions cause a problem that trained detection models overfit semantic features rather than splicing traces.

RITA: Group Attention is All You Need for Timeseries Analytics

no code implementations2 Jun 2023 Jiaming Liang, Lei Cao, Samuel Madden, Zachary Ives, Guoliang Li

Timeseries analytics is of great importance in many real-world applications.

Driver Profiling and Bayesian Workload Estimation Using Naturalistic Peripheral Detection Study Data

no code implementations26 Mar 2023 Nermin Caber, Bashar I. Ahmad, Jiaming Liang, Simon Godsill, Alexandra Bremers, Philip Thomas, David Oxtoby, Lee Skrypchuk

Monitoring drivers' mental workload facilitates initiating and maintaining safe interactions with in-vehicle information systems, and thus delivers adaptive human machine interaction with reduced impact on the primary task of driving.

Time Series

SigVIC: Spatial Importance Guided Variable-Rate Image Compression

no code implementations16 Mar 2023 Jiaming Liang, Meiqin Liu, Chao Yao, Chunyu Lin, Yao Zhao

Variable-rate mechanism has improved the flexibility and efficiency of learning-based image compression that trains multiple models for different rate-distortion tradeoffs.

Image Compression

GotFlow3D: Recurrent Graph Optimal Transport for Learning 3D Flow Motion in Particle Tracking

no code implementations31 Oct 2022 Jiaming Liang, Chao Xu, Shengze Cai

By introducing a novel deep neural network based on recurrent Graph Optimal Transport, called GotFlow3D, we present an end-to-end solution to learn the 3D fluid flow motion from double-frame particle sets.

Motion Estimation

A Proximal Algorithm for Sampling from Non-convex Potentials

no code implementations20 May 2022 Jiaming Liang, Yongxin Chen

This work extends the recent algorithm in \cite{LiaChe21, LiaChe22} for non-smooth/semi-smooth log-concave distribution to the setting with non-convex potentials.

STDC-MA Network for Semantic Segmentation

no code implementations10 May 2022 Xiaochun Lei, Linjun Lu, Zetao Jiang, Zhaoting Gong, Chang Lu, Jiaming Liang

Through this relationship, regions receiving much attention are integrated into the segmentation results, thereby reducing the unfocused regions of the input image and improving the effective utilization of multiscale features.

Autonomous Driving Segmentation +1

A Proximal Algorithm for Sampling

no code implementations28 Feb 2022 Jiaming Liang, Yongxin Chen

Departing from the standard smooth setting, the potentials are only assumed to be weakly smooth or non-smooth, or the summation of multiple such functions.

A Proximal Algorithm for Sampling from Non-smooth Potentials

no code implementations9 Oct 2021 Jiaming Liang, Yongxin Chen

One key contribution of this work is a fast algorithm that realizes the restricted Gaussian oracle for any convex non-smooth potential with bounded Lipschitz constant.

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