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Juncheng Liu

11 accepted papers

2026

EvoTest: Evolutionary Test-Time Learning for Self-Improving Agentic Systems

ICLR 2026poster

A fundamental limitation of current AI agents is their inability to learn complex skills on the fly at test time, often behaving like “clever but clueless interns” in novel environments. This severely limits their practical utility. To systematically measure and drive progress on this challenge, we…

Cited by 0SourcecodeScholar
2026

OpenTSLM: Time-Series Language Models for Reasoning over Multivariate Medical Text- and Time-Series Data

ICML 2026poster

Large Language Models (LLMs) have shown strong capability in interpreting multimodal data but remain limited in their ability to natively handle time-series data. Addressing this limitation could enable the translation of longitudinal and wearable sensing data into actionable insights and patient-fa…

Cited by 0SourceScholar
2025

Moirai-MoE: Empowering Time Series Foundation Models with Sparse Mixture of Experts

ICML 2025poster

Achieving effective unified pretraining on large time series corpora remains an open challenge in developing time series foundation models. Existing methods, such as Moirai, introduce multiple projection layers for time series of different frequencies to account for high data heterogeneity. We ident…

Cited by 0SourcePDFScholar
2024

Scalable and Effective Implicit Graph Neural Networks on Large Graphs

ICLR 2024poster

Graph Neural Networks (GNNs) have become the de facto standard for modeling graph-structured data in various applications. Among them, implicit GNNs have shown a superior ability to effectively capture long-range dependencies in underlying graphs. However, implicit GNNs tend to be computationally ex…

Cited by 10SourcePDFScholar
2022

A Fusion-Denoising Attack on InstaHide with Data Augmentation

AAAI 2022technical

InstaHide is a state-of-the-art mechanism for protecting private training images, by mixing multiple private images and modifying them such that their visual features are indistinguishable to the naked eye. In recent work, however, Carlini et al. show that it is possible to reconstruct private image…

2022

Dangling-Aware Entity Alignment with Mixed High-Order Proximities

NAACL 2022findings

We study dangling-aware entity alignment in knowledge graphs (KGs), which is an underexplored but important problem. As different KGs are naturally constructed by different sets of entities, a KG commonly contains some dangling entities that cannot find counterparts in other KGs. Therefore, dangling…

Cited by 10SourcePDFScholar
2022

MGNNI: Multiscale Graph Neural Networks with Implicit Layers

NeurIPS 2022accept

Recently, implicit graph neural networks (GNNs) have been proposed to capture long-range dependencies in underlying graphs. In this paper, we introduce and justify two weaknesses of implicit GNNs: the constrained expressiveness due to their limited effective range for capturing long-range dependenci…

2022

Should We Rely on Entity Mentions for Relation Extraction? Debiasing Relation Extraction with Counterfactual Analysis

NAACL 2022long

Recent literature focuses on utilizing the entity information in the sentence-level relation extraction (RE), but this risks leaking superficial and spurious clues of relations. As a result, RE still suffers from unintended entity bias, i.e., the spurious correlation between entity mentions (names)…

2021

EIGNN: Efficient Infinite-Depth Graph Neural Networks

NeurIPS 2021poster

Graph neural networks (GNNs) are widely used for modelling graph-structured data in numerous applications. However, with their inherently finite aggregation layers, existing GNN models may not be able to effectively capture long-range dependencies in the underlying graphs. Motivated by this limitati…

2017

Incremental Kernel Null Space Discriminant Analysis for Novelty Detection

CVPR 2017poster

Novelty detection, which aims to determine whether a given data belongs to any category of training data or not, is considered to be an important and challenging problem in areas of Pattern Recognition, Machine Learning, etc. Recently, kernel null space method (KNDA) was reported to have state-of-th…

Cited by 61PDFScholar