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Chengxi Li

15 accepted papers

2026

Efficient and Adaptive Simultaneous Speech Translation with Fully Unidirectional Architecture

AAAI 2026technical

Simultaneous speech translation (SimulST) produces translations incrementally while processing partial speech input. Although large language models (LLMs) have shown strong capabilities in offline translation tasks, applying them to SimulST poses notable challenges. Existing LLM-based SimulST appr

Cited by 0SourcePDFScholar
2026

GFreeDet2: Exploiting Gaussian Splatting and Foundation Models for RGB-Based Model-Free 2D and 6D Detection of Unseen Objects

ICRA 2026poster

We introduce GFreeDet2, which leverages Gaussian Splatting and foundation models to address RGB-based model-free 2D detection and 6D detection of unseen objects. GFreeDet2 reconstructs 3D Gaussian object models from multi-view RGB references, enabling efficient model-free detection without relying o…

Cited by 0codeScholar
2026

ReForm: Reflective Autoformalization with Prospective Bounded Sequence Optimization

ICLR 2026poster

Autoformalization, which translates natural language mathematics into machine-verifiable formal statements, is critical for using formal mathematical reasoning to solve math problems stated in natural language. While Large Language Models can generate syntactically correct formal statements, they of…

Cited by 0SourceScholar
2025

LLMs Can Achieve High-quality Simultaneous Machine Translation as Efficiently as Offline

ACL 2025finding

When the complete source sentence is provided, Large Language Models (LLMs) perform excellently in offline machine translation even with a simple prompt “Translate the following sentence from [src lang] into [tgt lang]:”. However, in many real scenarios, the source tokens arrive in a streaming manne…

2025

Street Gaussians without 3D Object Tracker

ICCV 2025poster

Realistic scene reconstruction in driving scenarios poses significant challenges due to fast-moving objects. Most existing methods rely on labor-intensive manual labeling of object poses to reconstruct dynamic objects in canonical space and move them based on these poses during rendering. While some…

Cited by 0SourcePDFScholar
2024

AlphaMath Almost Zero: Process Supervision without Process

NeurIPS 2024poster

Although recent advancements in large language models (LLMs) have significantly improved their performance on various tasks, they still face challenges with complex and symbolic multi-step reasoning, particularly in mathematical reasoning. To bolster the mathematical reasoning capabilities of LLMs,…

2024

MARIO: MAth Reasoning with code Interpreter Output - A Reproducible Pipeline

ACL 2024findings

Large language models (LLMs) have significantly improved in understanding natural language but still lack in mathematical reasoning, a hurdle on the path to true artificial general intelligence. The training of large language models, based on next-token prediction, struggles to capture the precise n…

2024

Step-level Value Preference Optimization for Mathematical Reasoning

EMNLP 2024finding

Direct Preference Optimization (DPO) using an implicit reward model has proven to be an effective alternative to reinforcement learning from human feedback (RLHF) for fine-tuning preference aligned large language models (LLMs). However, the overall preference annotations of responses do not fully ca…

2023

DS-1000: A Natural and Reliable Benchmark for Data Science Code Generation

ICML 2023poster

We introduce DS-1000, a code generation benchmark with a thousand data science problems spanning seven Python libraries, such as Numpy and Pandas. Compared to prior works, DS-1000 incorporates three core features. First, our problems reflect diverse, realistic, and practical use cases since we colle…

2022

DiffSinger: Singing Voice Synthesis via Shallow Diffusion Mechanism

AAAI 2022technical

Singing voice synthesis (SVS) systems are built to synthesize high-quality and expressive singing voice, in which the acoustic model generates the acoustic features (e.g., mel-spectrogram) given a music score. Previous singing acoustic models adopt a simple loss (e.g., L1 and L2) or generative adver…

2022

Keypoint-Based Planar Bimanual Shaping of Deformable Linear Objects Under Environmental Constraints With Hierarchical Action Framework

RA-L 2022

This letter addresses the problem of contact-based manipulation of deformable linear objects (DLOs) towards desired shapes with a dual-arm robotic system. To alleviate the burden of high-dimensional continuous state-action spaces, we model DLOs as kinematic multibody systems via our proposed keypoin

Cited by 42SourceScholar
2022

Learning the Beauty in Songs: Neural Singing Voice Beautifier

ACL 2022long

We are interested in a novel task, singing voice beautification (SVB). Given the singing voice of an amateur singer, SVB aims to improve the intonation and vocal tone of the voice, while keeping the content and vocal timbre. Current automatic pitch correction techniques are immature, and most of the…

2020

Distributed Detection of Sparse Signals with 1-Bit Data in Two-Level Two-Degree Tree-Structured Sensor Networks

ICASSP 2020accepted

In this paper, we present a new detector for the detection of sparse stochastic signals using 1-bit data in two-level two- degree tree-structured sensor networks (2L-2D TSNs). Related prior work mostly concentrates on parallel sensor networks (PSNs). However, PSNs may sometime become impractical in…

Cited by 0SourceScholar
2020

Learning 3D-aware Egocentric Spatial-Temporal Interaction via Graph Convolutional Networks

ICRA 2020poster

To enable intelligent automated driving systems, a promising strategy is to understand how human drives and interacts with road users in complicated driving situations. In this paper, we propose a 3D-aware egocentric spatial-temporal interaction framework for automated driving applications. Graph co…

Cited by 78SourceScholar
2020

Who Make Drivers Stop? Towards Driver-centric Risk Assessment: Risk Object Identification via Causal Inference

IROS 2020poster

A significant amount of people die in road accidents due to driver errors. To reduce fatalities, developing intelligent driving systems assisting drivers to identify potential risks is in an urgent need. Risky situations are generally defined based on collision prediction in the existing works. Howe…

Cited by 63SourceScholar