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Weijun Li

13 accepted papers

2026

From Coarse to Fine: Deep Prototype Refinement Network for Few-Shot Point Cloud Semantic Segmentation

ICML 2026poster

Few-shot point cloud semantic segmentation (FS-PCSS) aims to achieve precise segmentation of novel categories using only limited labeled samples. Existing prototype-based methods typically rely on shallow feature fusion strategies, failing to adequately model the feature distribution shift between s…

Cited by 0SourceScholar
2026

Implicit Neural Representation with Multi-Scale Sine Activation

AAAI 2026technical

Implicit Neural Representations (INRs) have become a powerful paradigm for modeling continuous signals in computer vision, graphics, and scientific computing. However, multilayer perceptrons (MLPs) generally suffer from severe spectral bias, which limits their ability to accurately model high-frequ

Cited by 0SourcePDFScholar
2026

TVDRNet: Text-driven Viewpoint Optimization via Differentiable Rendering for 3D Reasoning Segmentation

ICML 2026poster

Three-dimensional (3D) reasoning segmentation aims to segment target objects based on text instructions and 3D spatial cues. Recent efforts in 3D reasoning leverage Multimodal Large Language Models (MLLMs) to bridge the gap between text and 3D data. However, since MLLMs are primarily trained on text…

Cited by 0SourceScholar
2026

TopAdapter: Topology-Aware Prompt Tuning for Efficient Point Cloud Understanding

ICML 2026poster

Point cloud data, with its inherent geometric and topological structures, plays a critical role in 3D vision tasks. However, existing parameter-efficient fine-tuning (PEFT) methods predominantly focus on input token prompting, overlooking the intrinsic geometric information. To address this limitati…

Cited by 0SourceScholar
2025

Closed-form Solutions: A New Perspective on Solving Differential Equations

ICML 2025poster

The quest for analytical solutions to differential equations has traditionally been constrained by the need for extensive mathematical expertise. Machine learning methods like genetic algorithms have shown promise in this domain, but are hindered by significant computational time and the complexity…

Cited by 0SourcePDFScholar
2025

Cut the Deadwood Out: Backdoor Purification via Guided Module Substitution

EMNLP 2025

Model NLP models are commonly trained (or fine-tuned) on datasets from untrusted platforms like HuggingFace, posing significant risks of data poisoning attacks. A practical yet underexplored challenge arises when such backdoors are discovered after model deployment, making retraining-required defens

Cited by 0SourcePDFScholar
2025

MetaSymNet: A Tree-like Symbol Network with Adaptive Architecture and Activation Functions

AAAI 2025technical

Mathematical formulas are the language of communication between humans and nature. Discovering latent formulas from observed data is an important challenge in artificial intelligence, commonly known as symbolic regression(SR). The current mainstream SR algorithms regard SR as a combinatorial optimiz…

2025

Point Clouds Meets Physics: Dynamic Acoustic Field Fitting Network for Point Cloud Understanding

CVPR 2025poster

While existing pre-training-based methods have enhanced point cloud model performance, they have not fundamentally resolved the challenge of local structure representation in point clouds. The limited representational capacity of pure point cloud models continues to constrain the potential of cross-…

Cited by 1SourcePDFScholar
2024

A Neural-Guided Dynamic Symbolic Network for Exploring Mathematical Expressions from Data

ICML 2024poster

Symbolic regression (SR) is a powerful technique for discovering the underlying mathematical expressions from observed data. Inspired by the success of deep learning, recent deep generative SR methods have shown promising results. However, these methods face difficulties in processing high-dimension…

2024

GPSFormer: A Global Perception and Local Structure Fitting-based Transformer for Point Cloud Understanding

ECCV 2024poster

"Despite the significant advancements in pre-training methods for point cloud understanding, directly capturing intricate shape information from irregular point clouds without reliance on external data remains a formidable challenge. To address this problem, we propose GPSFormer, an innovative Globa…

2024

Seeing the Forest through the Trees: Data Leakage from Partial Transformer Gradients

EMNLP 2024main

Recent studies have shown that distributed machine learning is vulnerable to gradient inversion attacks, where private training data can be reconstructed by analyzing the gradients of the models shared in training. Previous attacks established that such reconstructions are possible using gradients f…

2023

Transformer-based model for symbolic regression via joint supervised learning

ICLR 2023poster

Symbolic regression (SR) is an important technique for discovering hidden mathematical expressions from observed data. Transformer-based approaches have been widely used for machine translation due to their high performance, and are recently highly expected to be used for SR. They input the data poi…

Cited by 28SourcePDFScholar