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Sijin Chen

16 accepted papers

2026

Beyond Masks: Efficient, Flexible Diffusion Language Models via Deletion-Insertion Processes

ICLR 2026poster

While Masked Diffusion Language Models (MDLMs) relying on token masking and unmasking have shown promise in language modeling, their computational efficiency and generation flexibility remain constrained by the masking paradigm. In this paper, we propose Deletion-Insertion Diffusion language models…

Cited by 0SourcecodeScholar
2026

DSPv2: Improved Dense Policy for Effective and Generalizable Whole-Body Mobile Manipulation

ICRA 2026poster

Learning whole-body mobile manipulation via imitation is essential for generalizing robotic skills to diverse environments and complex tasks. However, this goal is hindered by significant challenges, particularly in effectively processing complex observation, achieving robust generalization, and gen…

2026

From Spatial to Actions: Grounding Vision-Language-Action Model in Spatial Foundation Priors

ICLR 2026poster

Existing vision-language-action (VLA) models act in 3D real-world but are typically built on 2D encoders, leaving a spatial reasoning gap that limits generalization and adaptability. Recent 3D integration techniques for VLAs either require specialized sensors and transfer poorly across modalities, o…

Cited by 0SourcecodeScholar
2026

OmniLottie: Generating Vector Animations via Parameterized Lottie Tokens

CVPR 2026

OmniLottie is a versatile framework that generates high-quality vector animations from multi-modal instructions, including interleaved texts, images, and videos. To fully parameterize vector animations for flexible motion and visual content control, we seek help from the Lottie representation, which

Cited by 0SourcecodeScholar
2026

World Guidance: World Modeling in Condition Space for Action Generation

ICML 2026poster

Leveraging future observation modeling to facilitate action generation presents a promising avenue for enhancing the capabilities of Vision-Language-Action (VLA) models. However, existing approaches struggle to strike a balance between maintaining efficient, predictable future representations and pr…

Cited by 0SourceScholar
2025

Decoding Game: On Minimax Optimality of Heuristic Text Generation Strategies

ICLR 2025poster

Decoding strategies play a pivotal role in text generation for modern language models, yet a puzzling gap divides theory and practice. Surprisingly, strategies that should intuitively be optimal, such as Maximum a Posteriori (MAP), often perform poorly in practice. Meanwhile, popular heuristic appro…

Cited by 1SourcePDFScholar
2025

MeshAnything: Artist-Created Mesh Generation with Autoregressive Transformers

ICLR 2025poster

Recently, 3D assets created via reconstruction and generation have matched the quality of manually crafted assets, highlighting their potential for replacement. However, this potential is largely unrealized because these assets always need to be converted to meshes for 3D industry applications, and…

2025

OmniSVG: A Unified Scalable Vector Graphics Generation Model

NeurIPS 2025poster

Scalable Vector Graphics (SVG) is an important image format widely adopted in graphic design because of their resolution independence and editability. The study of generating high-quality SVG has continuously drawn attention from both designers and researchers in the AIGC community. However, existin…

Cited by 0SourceScholar
2024

3DET-Mamba: Causal Sequence Modelling for End-to-End 3D Object Detection

NeurIPS 2024poster

Transformer-based architectures have been proven successful in detecting 3D objects from point clouds. However, the quadratic complexity of the attention mechanism struggles to encode rich information as point cloud resolution increases. Recently, state space models (SSM) such as Mamba have gained g…

Cited by 0SourcePDFScholar
2024

Escaping Saddle Points in Heterogeneous Federated Learning via Distributed SGD with Communication Compression

AISTATS 2024poster

We consider the problem of finding second-order stationary points in the optimization of heterogeneous federated learning (FL). Previous works in FL mostly focus on first-order convergence guarantees, which do not rule out the scenario of unstable saddle points. Meanwhile, it is a key bottleneck of…

Cited by 5SourcePDFScholar
2024

LL3DA: Visual Interactive Instruction Tuning for Omni-3D Understanding Reasoning and Planning

CVPR 2024poster

Recent progress in Large Multimodal Models (LMM) has opened up great possibilities for various applications in the field of human-machine interactions. However developing LMMs that can comprehend reason and plan in complex and diverse 3D environments remains a challenging topic especially considerin…

2024

M3DBench: Towards Omni 3D Assistant with Interleaved Multi-modal Instructions

ECCV 2024poster

"Recently, the understanding of the 3D world has garnered increased attention, facilitating autonomous agents to perform further decision-making. However, the majority of existing 3D vision-language datasets and methods are often limited to specific tasks, limiting their applicability in diverse sce…

Cited by 0SourcePDFScholar
2024

MeshXL: Neural Coordinate Field for Generative 3D Foundation Models

NeurIPS 2024poster

The polygon mesh representation of 3D data exhibits great flexibility, fast rendering speed, and storage efficiency, which is widely preferred in various applications. However, given its unstructured graph representation, the direct generation of high-fidelity 3D meshes is challenging. Fortunately,…

2024

Non-Convex Joint Community Detection and Group Synchronization via Generalized Power Method

AISTATS 2024poster

This paper proposes a Generalized Power Method (GPM) to simultaneously solve the joint problem of community detection and group synchronization in a direct non-convex manner, in contrast to the existing method of semidefinite programming (SDP). Under a natural extension of stochastic block model (SB…

Cited by 5SourcePDFScholar
2023

End-to-End 3D Dense Captioning With Vote2Cap-DETR

CVPR 2023poster

3D dense captioning aims to generate multiple captions localized with their associated object regions. Existing methods follow a sophisticated "detect-then-describe" pipeline equipped with numerous hand-crafted components. However, these hand-crafted components would yield suboptimal performance giv…

2021

CIA-SSD: Confident IoU-Aware Single-Stage Object Detector From Point Cloud

AAAI 2021technical

Existing single-stage detectors for locating objects in point clouds often treat object localization and category classification as separate tasks, so the localization accuracy and classification confidence may not well align. To address this issue, we present a new single-stage detector named the C…