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Peng Liu

55 accepted papers

2026

CSC-FMT*: Efficient 3D Path Planning Via Cylindrical Space-Cutting Fast Marching Tree

RA-L 2026

Sampling-based path planning algorithms like the Fast Marching Tree (FMT<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">*</sup>) often suffer from redundant exploration and inefficient sampling in complex 3D environments. To tackle these issues, this pa

Cited by 0SourceScholar
2026

Generalizing Bayesian Human-AI Collaboration: Theory and Application in Data-Scarce Environments

IJCAI 2026

Combining predictions from heterogeneous classifiers—such as in-house deep learning models, human experts, and large language models (LLMs)—is a key challenge, especially in data-scarce environments such as humanitarian operations. We propose a flexible Bayesian framework to effectively fuse these d

Cited by 0Scholar
2026

IntroSVG: Learning from Rendering Feedback for Text-to-SVG Generation via an Introspective Generator-Critic Framework

CVPR 2026

Scalable Vector Graphics (SVG) are central to digital design due to their inherent scalability and editability. Despite significant advancements in content generation enabled by Visual Language Models (VLMs), existing text-to-SVG generation methods are limited by a core challenge: the autoregressive

Cited by 0SourceScholar
2026

Robust Vision-Language Models via Manifold-Adversarial Adapters

ICML 2026poster

Vision-language models (VLMs) have progressed rapidly with large-scale high-quality data and adaptation strategies, yet remain brittle under real-world corruptions, where both visual recognition and language-grounded reasoning degrade. Beyond cascaded image restoration, a natural alternative is para…

Cited by 0SourceScholar
2026

Towards Adaptive Humanoid Control via Multi-Behavior Distillation and Reinforced Fine-Tuning

AAAI 2026technical

Humanoid robots are promising to learn a diverse set of human-like locomotion behaviors, including standing up, walking, running, and jumping. However, existing methods predominantly require training independent policies for each skill, yielding behavior-specific controllers that exhibit limited gen

Cited by 0SourcePDFScholar
2025

Enpowering Your Pansharpening Models with Generalizability: Unified Distribution is All You Need

ICCV 2025poster

Existing deep learning-based models for remote sensing pansharpening exhibit exceptional performance on training datasets. However, due to sensor-specific characteristics and varying imaging conditions, these models suffer from substantial performance degradation when applied to unseen satellite dat…

2025

FinRipple: Aligning Large Language Models with Financial Market for Event Ripple Effect Awareness

ACL 2025finding

Financial markets exhibit complex dynamics where localized events trigger ripple effects across entities. Previous event studies, constrained by static single-companies analyses and simplistic assumptions, fail to capture these ripple effects. While large language models (LLMs) offer emergent reason…

Cited by 0SourcePDFScholar
2025

LBPE: Long-token-first Tokenization to Improve Large Language Models

ICASSP 2025accepted

The prevalent use of Byte Pair Encoding (BPE) in Large Language Models (LLMs) facilitates robust handling of subword units and avoids issues of out-of-vocabulary words. Despite its success, a critical challenge persists: long tokens, rich in semantic information, have fewer occurrences in tokenized…

Cited by 0SourceScholar
2025

LCAN: A Label-Aware Contrastive Attention Network for Multi-Intent Recognition and Slot Filling in Task-Oriented Dialogue Systems

EMNLP 2025

Multi-intent utterances processing remains a persistent challenge due to intricate intent-slot dependencies and semantic ambiguities. Traditional methods struggle to model these complex interactions, particularly when handling overlapping slot structures across multiple intents. This paper introduce

Cited by 0SourcePDFScholar
2025

Learning Adaptive Spatial-temporal Structured Correlation Filters for UAV Object Tracking

ICASSP 2025accepted

In visual object tracking via unmanned aerial vehicle (UAV), discriminative correlation filtering (DCF) is one of the major methods owing to circulant samples which can be utilized not only for computing economically but also to hasten the optimization of filters. The universal DCF methods are seen…

Cited by 0SourceScholar
2025

Radiology Report Generation via Multi-objective Preference Optimization

AAAI 2025technical

Automatic Radiology Report Generation (RRG) is an important topic for alleviating the substantial workload of radiologists. Existing RRG approaches rely on supervised regression based on different architectures or additional knowledge injection, while the generated report may not align optimally wit…

Cited by 2SourcePDFScholar
2025

Safe Planner: Empowering Safety Awareness in Large Pre-Trained Models for Robot Task Planning

AAAI 2025technical

Robot task planning is an important problem for autonomous robots in long-horizon challenging tasks. As large pre-trained models have demonstrated superior planning ability, recent research investigates utilizing large models to achieve autonomous planning for robots in diverse tasks. However, sinc…

Cited by 3SourcePDFScholar
2025

SkillTree: Explainable Skill-Based Deep Reinforcement Learning for Long-Horizon Control Tasks

AAAI 2025technical

Deep reinforcement learning (DRL) has achieved remarkable success in various domains, yet its reliance on neural networks results in a lack of transparency, which limits its practical applications in safety-critical and human-agent interaction domains. Decision trees, known for their notable explain…

2025

VERO: Verification and Zero-Shot Feedback Acquisition for Few-Shot Multimodal Aspect-Level Sentiment Classification

AAAI 2025technical

Deep learning approaches for multimodal aspect-level sentiment classification (MALSC) often require extensive data, which is costly and time-consuming to obtain. To mitigate this, current methods typically fine-tune small-scale pretrained models like BERT and BART with few-shot examples. While these…

2024

AUEditNet: Dual-Branch Facial Action Unit Intensity Manipulation with Implicit Disentanglement

CVPR 2024poster

Facial action unit (AU) intensity plays a pivotal role in quantifying fine-grained expression behaviors which is an effective condition for facial expression manipulation. However publicly available datasets containing intensity annotations for multiple AUs remain severely limited often featuring a…

Cited by 2SourcePDFScholar
2024

Diffusion-Based Pose Refinement and Multi-Hypothesis Generation for 3D Human Pose Estimation

ICASSP 2024accepted

Previous probabilistic models for 3D Human Pose Estimation (3DHPE) aimed to enhance pose accuracy by generating multiple hypotheses. However, most of the hypotheses generated deviate substantially from the true pose. Compared to deterministic models, the excessive uncertainty in probabilistic models…

Cited by 0SourceScholar
2024

EG-NAS: Neural Architecture Search with Fast Evolutionary Exploration

AAAI 2024technical

Differentiable Architecture Search (DARTS) has achieved a rapid search for excellent architectures by optimizing architecture parameters through gradient descent. However, this efficiency comes with a significant challenge: the risk of premature convergence to local optima, resulting in subpar perfo…

2024

How to Evaluate the Generalization of Detection? A Benchmark for Comprehensive Open-Vocabulary Detection

AAAI 2024technical

Object detection (OD) in computer vision has made significant progress in recent years, transitioning from closed-set labels to open-vocabulary detection (OVD) based on large-scale vision-language pre-training (VLP). However, current evaluation methods and datasets are limited to testing generalizat…

2024

Latent Trajectory Learning for Limited Timestamps under Distribution Shift over Time

ICLR 2024oral

Distribution shifts over time are common in real-world machine-learning applications. This scenario is formulated as Evolving Domain Generalization (EDG), where models aim to generalize well to unseen target domains in a time-varying system by learning and leveraging the underlying evolving pattern…

Cited by 6SourcePDFScholar
2024

Lightweight High-Resolution Subject Matting in the Real World

ICASSP 2024accepted

Existing saliency object detection (SOD) methods struggle to satisfy fast inference and accurate results simultaneously in high resolution scenes. They are limited by the quality of public datasets and efficient network modules for high-resolution images. To alleviate these issues, we propose to con…

Cited by 0SourceScholar
2024

MTIDNet: A Multimodal Temporal Interest Detection Network for Video Summarization

ICASSP 2024accepted

Video summarization involves creating a succinct overview by merging the valuable parts of a video. Existing video summarization methods approach this task as a problem of selecting keyframes by frame- and shot-level techniques with unimodal or bimodal information. Besides underestimated inter-relat…

Cited by 0SourceScholar
2024

Modal Consensus and Contextual Separation for Weakly Supervised Temporal Action Localization

ICASSP 2024accepted

Weakly-supervised Temporal Action Localization (W-TAL) is a challenging task aiming to achieve both action class identification and localization of temporal boundaries using video-level label learning. Recent methods resort to basic cascading or integration of appearance and optical flow features, o…

Cited by 0SourceScholar
2024

Model-Driven Deep Neural Network for Enhanced AoA Estimation Using 5G gNB

AAAI 2024technical

High-accuracy positioning has become a fundamental enabler for intelligent connected devices. Nevertheless, the present wireless networks still rely on model-driven approaches to achieve positioning functionality, which are susceptible to performance degradation in practical scenarios, primarily due…

Cited by 8SourcePDFScholar
2024

NLEBench+NorGLM: A Comprehensive Empirical Analysis and Benchmark Dataset for Generative Language Models in Norwegian

EMNLP 2024main

Norwegian, spoken by only 5 million population, is under-representative within the most impressive breakthroughs in NLP tasks. To the best of our knowledge, there has not yet been a comprehensive evaluation of the existing language models (LMs) on Norwegian generation tasks during the article writin…

2024

PersonalSum: A User-Subjective Guided Personalized Summarization Dataset for Large Language Models

NeurIPS 2024poster

With the rapid advancement of Natural Language Processing in recent years, numerous studies have shown that generic summaries generated by Large Language Models (LLMs) can sometimes surpass those annotated by experts, such as journalists, according to human evaluations. However, there is limited res…

2024

Preference Optimization for Molecule Synthesis with Conditional Residual Energy-based Models

ICML 2024oral

Molecule synthesis through machine learning is one of the fundamental problems in drug discovery. Current data-driven strategies employ one-step retrosynthesis models and search algorithms to predict synthetic routes in a top-bottom manner. Despite their effective performance, these strategies face…

2024

Robust Visual Imitation Learning with Inverse Dynamics Representations

AAAI 2024technical

Imitation learning (IL) has achieved considerable success in solving complex sequential decision-making problems. However, current IL methods mainly assume that the environment for learning policies is the same as the environment for collecting expert datasets. Therefore, these methods may fail to w…

Cited by 2SourcePDFScholar
2024

Towards Electricity-free Pneumatic Miniature Rotation Actuator for Optical Coherence Tomography Endoscopy

IROS 2024poster

Miniature rotation actuators have been extensively developed and utilized in optical coherence tomography (OCT) endoscopy, enabling distortion-free OCT imaging in complex and tortuous environments. However, the use of electrical-driven rotation actuators raises safety concerns. Although magnetic-dri…

Cited by 0SourceScholar
2024

Zero-shot High-fidelity and Pose-controllable Character Animation

IJCAI 2024poster

Image-to-video (I2V) generation aims to create a video sequence from a single image, which requires high temporal coherence and visual fidelity. However, existing approaches suffer from inconsistency of character appearances and poor preservation of fine details. Moreover, they require a large amoun…

Cited by 4SourcePDFScholar
2023

A Synthetic Corpus Generation Method for Neural Vocoder Training

ICASSP 2023accepted

Nowadays, neural vocoders are preferred for their ability to synthesize high-fidelity audio. However, training a neural vocoder requires a massive corpus of high-quality real audio, and the audio recording process is often labor-intensive. In this work, we propose a synthetic corpus generation metho…

Cited by 0SourceScholar
2023

Bayesian Optimization with Switching Cost: Regret Analysis and Lookahead Variants

IJCAI 2023poster

Bayesian Optimization (BO) has recently received increasing attention due to its efficiency in optimizing expensive-to-evaluate functions. For some practical problems, it is essential to consider the path-dependent switching cost between consecutive sampling locations given a total traveling budget…

Cited by 6SourcePDFScholar
2023

Behavior Contrastive Learning for Unsupervised Skill Discovery

ICML 2023poster

In reinforcement learning, unsupervised skill discovery aims to learn diverse skills without extrinsic rewards. Previous methods discover skills by maximizing the mutual information (MI) between states and skills. However, such an MI objective tends to learn simple and static skills and may hinder e…

2023

Matting Moments: A Unified Data-Driven Matting Engine for Mobile AIGC in Photo Gallery

IJCAI 2023poster

Image matting is a fundamental technique in visual understanding and has become one of the most significant capabilities in mobile phones. Despite the development of mobile storage and computing power, achieving diverse mobile Artificial Intelligence Generated Content (AIGC) applications remains a g…

Cited by 3SourcePDFScholar
2022

Balancing Multi-Domain Corpora Learning for Open-Domain Response Generation

NAACL 2022findings

Open-domain conversational systems are assumed to generate equally good responses on multiple domains. Previous work achieved good performance on the single corpus, but training and evaluating on multiple corpora from different domains are less studied. This paper explores methods of generating rele…

2022

Pessimistic Bootstrapping for Uncertainty-Driven Offline Reinforcement Learning

ICLR 2022spotlight

Offline Reinforcement Learning (RL) aims to learn policies from previously collected datasets without exploring the environment. Directly applying off-policy algorithms to offline RL usually fails due to the extrapolation error caused by the out-of-distribution (OOD) actions. Previous methods tackle…

2022

Sample Average Approximation for Stochastic Optimization with Dependent Data: Performance Guarantees and Tractability

AAAI 2022technical

Sample average approximation (SAA), a popular method for tractably solving stochastic optimization problems, enjoys strong asymptotic performance guarantees in settings with independent training samples. However, these guarantees are not known to hold generally with dependent samples, such as in onl…

Cited by 10SourcePDFScholar
2022

The Feedback Trajectory Control of a SMA-Driven Miniature Jumping Robot

ICRA 2022poster

Jumping motion is an effective way to overcome large obstacles, especially for the miniature robots. However, controlling of the jumping trajectory on a centimeter scale robot is not easy due to the limitation of size and payload. None of the jumping robots lighter than 90 g achieved the feedback co…

Cited by 8SourceScholar
2021

Dynamic Bottleneck for Robust Self-Supervised Exploration

NeurIPS 2021poster

Exploration methods based on pseudo-count of transitions or curiosity of dynamics have achieved promising results in solving reinforcement learning with sparse rewards. However, such methods are usually sensitive to environmental dynamics-irrelevant information, e.g., white-noise. To handle such dyn…

2021

Exploring the application of synthetic audio in training keyword spotters

ICASSP 2021accepted

The study of keyword spotting, a subfield within the broader field of speech recognition that centers around identifying individual keywords in speech audio, has gained particular importance in recent years with the rise of personal voice assistants such as Alexa. As voice assistants aim to rapidly…

Cited by 0SourceScholar
2021

Principled Exploration via Optimistic Bootstrapping and Backward Induction

ICML 2021spotlight

One principled approach for provably efficient exploration is incorporating the upper confidence bound (UCB) into the value function as a bonus. However, UCB is specified to deal with linear and tabular settings and is incompatible with Deep Reinforcement Learning (DRL). In this paper, we propose a…

2020

Code-Switched Speech Synthesis Using Bilingual Phonetic Posteriorgram with Only Monolingual Corpora

ICASSP 2020accepted

Synthesizing fluent code-switched (CS) speech with consistent voice using only monolingual corpora is still a challenging task, since language alternation seldom occurs during training and the speaker identity is directly correlated with language. In this paper, we present a bilingual phonetic poste…

Cited by 0SourceScholar
2019

A Deep Step Pattern Representation for Multimodal Retinal Image Registration

ICCV 2019poster

This paper presents a novel feature-based method that is built upon a convolutional neural network (CNN) to learn the deep representation for multimodal retinal image registration. We coined the algorithm deep step patterns, in short DeepSPa. Most existing deep learning based methods require a set o…

Cited by 65PDFScholar
2016

Learning cross-lingual information with multilingual BLSTM for speech synthesis of low-resource languages

ICASSP 2016accepted

Bidirectional long short-term memory (BLSTM) based speech synthesis has shown great potential in improving the quality of the synthetic speech. However, for low-resource languages, it is difficult to obtain a high quality BLSTM model. BLSTM based speech synthesis can be viewed as a transformation be…

Cited by 0SourceScholar
2016

Multimodal Spontaneous Emotion Corpus for Human Behavior Analysis

CVPR 2016poster

Emotion is expressed in multiple modalities, yet most research has considered at most one or two. This stems in part from the lack of large, diverse, well-annotated, multimodal databases with which to develop and test algorithms. We present a well-annotated, multimodal, multidimensional spontaneous…

Cited by 521PDFScholar
2015

A deep recurrent approach for acoustic-to-articulatory inversion

ICASSP 2015accepted

To solve the acoustic-to-articulatory inversion problem, this paper proposes a deep bidirectional long short term memory recurrent neural network and a deep recurrent mixture density network. The articulatory parameters of the current frame may have correlations with the acoustic features many frame…

Cited by 0SourceScholar
2015

An iterative reweighted minimization framework for joint channel and power allocation in the OFDMA system

ICASSP 2015accepted

We consider the joint channel and power allocation problem for the OFDMA system. The problem is to find a joint channel and power allocation strategy to minimize the total transmission power subject to quality of service constraints and the OFDMA constraint (i.e, at most one user is allowed to acces…

Cited by 0SourceScholar