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Yujun Zhang

6 accepted papers

2026

SpecDetect: Simple, Fast, and Training-Free Detection of LLM-Generated Text via Spectral Analysis

AAAI 2026technical

The proliferation of high-quality text from Large Language Models (LLMs) demands reliable and efficient detection methods. While existing training-free approaches show promise, they often rely on surface-level statistics and overlook fundamental signal properties of the text generation process. In t

Cited by 0SourcePDFScholar
2025

Backdoor Attack on Propagation-based Rumor Detectors

AAAI 2025technical

Rumor detection is critical as the spread of misinformation on social media threatens social stability. The propagation structure has garnered attention for its ability to capture discriminative information, such as crowd stance, which has led to the development of enhanced detection methods. Howeve…

Cited by 0SourcePDFScholar
2025

Generating Targeted Universal Adversarial Perturbation against Automatic Speech Recognition via Phoneme Tailoring

ICASSP 2025accepted

There is a growing concern about adversarial attacks against automatic speech recognition (ASR) systems. Although research into targeted universal adversarial examples (AEs) has progressed, current methods are constrained by inefficient exploitation of audio features, demonstrating insufficient atta…

Cited by 0SourceScholar
2025

Stealthy Yet Effective: Distribution-Preserving Backdoor Attacks on Graph Classification

NeurIPS 2025poster

Graph Neural Networks (GNNs) have demonstrated strong performance across tasks such as node classification, link prediction, and graph classification, but remain vulnerable to backdoor attacks that implant imperceptible triggers during training to control predictions. While node-level attacks exploi…

Cited by 0SourcecodeScholar
2024

Spectral-Based Graph Neural Networks for Complementary Item Recommendation

AAAI 2024technical

Modeling complementary relationships greatly helps recommender systems to accurately and promptly recommend the subsequent items when one item is purchased. Unlike traditional similar relationships, items with complementary relationships may be purchased successively (such as iPhone and Airpods Pro)…

2021

VIL-100: A New Dataset and a Baseline Model for Video Instance Lane Detection

ICCV 2021poster

Lane detection plays a key role in autonomous driving. While car cameras always take streaming videos on the way, current lane detection works mainly focus on individual images (frames) by ignoring dynamics along the video. In this work, we collect a new video instance lane detection (VIL-100) datas…

Cited by 63PDFcodeScholar