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Zixuan Zhang

22 accepted papers

2026

Anchor-Guided Discriminative Subspace Alignment and Clustering for Cross-Scene Hyperspectral Imagery

AAAI 2026technical

Cross-scene hyperspectral image (HSI) recognition aims to assign a unique label to each pixel in the target scene by transferring knowledge from the source scene. Existing methods primarily rely on fully labeled source data and either partially labeled or unlabeled target data. No prior work has add

Cited by 0SourcePDFScholar
2026

COSMOS: A Hybrid Adaptive Optimizer for Efficient Training of Large Language Models

ICLR 2026poster

Large Language Models (LLMs) have demonstrated remarkable success across various domains, yet their optimization remains a significant challenge due to the complex and high-dimensional loss landscapes they inhabit. While adaptive optimizers such as AdamW are widely used, they suffer from critical li…

Cited by 0SourcecodeScholar
2026

Generalization Bounds for Discrete Diffusion: Statistical Advantage of Masking

ICML 2026poster

Discrete diffusion models have recently emerged as a compelling alternative for language generation, enabling efficient non-autoregressive sampling while achieving strong empirical performance. A key design choice in discrete diffusion---absent in most continuous diffusion formulations---is the forw…

Cited by 0SourceScholar
2026

GeniNav: Generative Model Driven Image-Goal Navigation via Imagination-Guided Consistency Flow Matching

CVPR 2026

Image-goal navigation driven by generative models has recently shown strong potential owing to their ability to perform multi-modal reasoning and stable learning in continuous control spaces. Despite their promise, current methods still face several fundamental limitations. Many rely on pre-built pr

Cited by 0SourcecodeScholar
2025

A Minimalist Example of Edge-of-Stability and Progressive Sharpening

NeurIPS 2025poster

Recent advances in deep learning optimization have unveiled two intriguing phenomena under large learning rates: Edge of Stability (EoS) and Progressive Sharpening (PS), challenging classical Gradient Descent (GD) analyses. Current research approaches, using either generalist frameworks or minimalis…

Cited by 0SourceScholar
2025

Collaborative Association Network for Multi-view Multi-Human Association and Tracking using Constraint Optimization and Object Search

ICASSP 2025accepted

Multi-view multi-human association and tracking (MvMHAT) enhances scene perception using multiple cameras, crucial for applications such as surveillance and crowd analysis. Inherent feature disparities between views complicate similarity calculations. Recent works combine representation and motion i…

Cited by 0SourceScholar
2025

IHEval: Evaluating Language Models on Following the Instruction Hierarchy

NAACL 2025long

The instruction hierarchy, which establishes a priority order from system messages to user messages, conversation history, and tool outputs, is essential for ensuring consistent and safe behavior in language models (LMs). Despite its importance, this topic receives limited attention, and there is a…

2024

EVEDIT: Event-based Knowledge Editing for Deterministic Knowledge Propagation

EMNLP 2024main

The dynamic nature of real-world information necessitates knowledge editing (KE) in large language models (LLMs). The edited knowledge should propagate and facilitate the deduction of new information based on existing model knowledge. We term the existing related knowledge in LLM serving as the orig…

Cited by 3SourcePDFScholar
2024

Nonparametric Classification on Low Dimensional Manifolds using Overparameterized Convolutional Residual Networks

NeurIPS 2024poster

Convolutional residual neural networks (ConvResNets), though overparametersized, can achieve remarkable prediction performance in practice, which cannot be well explained by conventional wisdom. To bridge this gap, we study the performance of ConvResNeXts trained with weight decay, which cover ConvR…

Cited by 2SourcePDFScholar
2024

Robust Reinforcement Learning from Corrupted Human Feedback

NeurIPS 2024poster

Reinforcement learning from human feedback (RLHF) provides a principled framework for aligning AI systems with human preference data. For various reasons, e.g., personal bias, context ambiguity, lack of training, etc, human annotators may give incorrect or inconsistent preference labels. To tackle…

Cited by 4SourcePDFScholar
2024

TextEE: Benchmark, Reevaluation, Reflections, and Future Challenges in Event Extraction

ACL 2024findings

Event extraction has gained considerable interest due to its wide-ranging applications. However, recent studies draw attention to evaluation issues, suggesting that reported scores may not accurately reflect the true performance. In this work, we identify and address evaluation challenges, including…

2024

Towards Better Generalization in Open-Domain Question Answering by Mitigating Context Memorization

NAACL 2024findings

Open-domain Question Answering (OpenQA) aims at answering factual questions with an external large-scale knowledge corpus. However, real-world knowledge is not static; it updates and evolves continually. Such a dynamic characteristic of knowledge poses a vital challenge for these models, as the trai…

2024

Why Does New Knowledge Create Messy Ripple Effects in LLMs?

EMNLP 2024main

Extensive previous research has focused on post-training knowledge editing (KE) for language models (LMs) to ensure that knowledge remains accurate and up-to-date. One desired property and open question in KE is to let edited LMs correctly handle ripple effects, where LM is expected to answer its lo…

2023

Effective Minkowski Dimension of Deep Nonparametric Regression: Function Approximation and Statistical Theories

ICML 2023poster

Existing theories on deep nonparametric regression have shown that when the input data lie on a low-dimensional manifold, deep neural networks can adapt to the intrinsic data structures. In real world applications, such an assumption of data lying exactly on a low dimensional manifold is stringent.…

Cited by 3SourcePDFScholar
2023

ODE-RSSM: Learning Stochastic Recurrent State Space Model from Irregularly Sampled Data

AAAI 2023technical

For the complicated input-output systems with nonlinearity and stochasticity, Deep State Space Models (SSMs) are effective for identifying systems in the latent state space, which are of great significance for representation, forecasting, and planning in online scenarios. However, most SSMs are desi…

2023

Rethinking Safe Control in the Presence of Self-Seeking Humans

AAAI 2023technical

Safe control methods are often designed to behave safely even in worst-case human uncertainties. Such design can cause more aggressive human behaviors that exploit its conservatism and result in greater risk for everyone. However, this issue has not been systematically investigated previously. This…

Cited by 4SourcePDFScholar
2022

Language Model Pre-Training with Sparse Latent Typing

EMNLP 2022main

Modern large-scale Pre-trained Language Models (PLMs) have achieved tremendous success on a wide range of downstream tasks. However, most of the LM pre-training objectives only focus on text reconstruction, but have not sought to learn latent-level interpretable representations of sentences. In this…

2022

RESIN-11: Schema-guided Event Prediction for 11 Newsworthy Scenarios

NAACL 2022system demonstrations

We introduce RESIN-11, a new schema-guided event extraction&prediction framework that can be applied to a large variety of newsworthy scenarios. The framework consists of two parts: (1) an open-domain end-to-end multimedia multilingual information extraction system with weak-supervision and zero-sho…

2021

Abstract Meaning Representation Guided Graph Encoding and Decoding for Joint Information Extraction

NAACL 2021long

The tasks of Rich Semantic Parsing, such as Abstract Meaning Representation (AMR), share similar goals with Information Extraction (IE) to convert natural language texts into structured semantic representations. To take advantage of such similarity, we propose a novel AMR-guided framework for joint…

2021

EventKE: Event-Enhanced Knowledge Graph Embedding

EMNLP 2021finding

Relations in most of the traditional knowledge graphs (KGs) only reflect static and factual connections, but fail to represent the dynamic activities and state changes about entities. In this paper, we emphasize the importance of incorporating events in KG representation learning, and propose an eve…

2021

Fine-grained Information Extraction from Biomedical Literature based on Knowledge-enriched Abstract Meaning Representation

ACL 2021long

Biomedical Information Extraction from scientific literature presents two unique and non-trivial challenges. First, compared with general natural language texts, sentences from scientific papers usually possess wider contexts between knowledge elements. Moreover, comprehending the fine-grained scien…

2019

Learning Latent Process from High-Dimensional Event Sequences via Efficient Sampling

NeurIPS 2019poster

We target modeling latent dynamics in high-dimension marked event sequences without any prior knowledge about marker relations. Such problem has been rarely studied by previous works which would have fundamental difficulty to handle the arisen challenges: 1) the high-dimensional markers and unknown…