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Fei Liu

67 accepted papers

2026

CIRBench: Evaluating Large Language Models as LLVM IR Optimizers

ICML 2026spotlight

Large language models are beginning to introduce a new paradigm for compilation: instead of only assisting at the source level, they can operate directly on **intermediate representations (IRs)**, the compiler’s internal code representation, Early studies suggest that LLM-guided optimization can som…

Cited by 0SourceScholar
2026

Cross-domain Dual-stream Feature Disentanglement for Brain Disorder Prediction with Sparsely Labeled PET

CVPR 2026

Positron Emission Tomography (PET) can be used for the early diagnosis of various brain disorders. However, the annotation of PET scans requires the involvement of specialized nuclear medicine experts, making accurately annotated PET data extremely scarce. MRI-based cross-modal domain adaptation met

Cited by 0SourceScholar
2026

Debate over Mixed-knowledge: A Robust Multi-Agent Reasoning Framework for Incomplete Knowledge Graph Question Answering

AAAI 2026technical

Knowledge Graph Question Answering (KGQA) aims to improve factual accuracy by leveraging structured knowledge. However, real-world Knowledge Graphs (KGs) are often incomplete, leading to the problem of Incomplete KGQA (IKGQA). A common solution is to incorporate external data to fill knowledge gaps,

Cited by 0SourcePDFScholar
2026

EoH-S: Evolution of Heuristic Set Using LLMs for Automated Heuristic Design

AAAI 2026technical

Automated Heuristic Design (AHD) using Large Language Models (LLMs) has achieved notable success in the past two years. Despite the effectiveness of existing approaches, they only design a single heuristic to serve all problem instances, often inducing poor generalization across different distributi

Cited by 0SourcePDFScholar
2026

HiCD: Hyperbolic Insight Through Decomposed Educational Graphs for Long-Tailed Cognitive Diagnosis

IJCAI 2026

Cognitive diagnosis (CD) aims to infer students' mastery of knowledge concepts from their response behaviors and constitutes a core component of intelligent education and personalized learning. However, existing graph-based CD models struggle to handle the pronounced long-tail distributions in educa

Cited by 0Scholar
2026

Hierarchical Representations for Cross-task Automated Heuristic Design using LLMs

ICML 2026poster

Designing heuristic algorithms for complex optimization problems is a time-consuming and expert-driven process. Recently, Automated Heuristic Design (AHD) using Large Language Models (LLMs) has shown significant promise for automating algorithm development. However, existing works mainly rely on pro…

Cited by 0SourceScholar
2026

Multimodal LLM-assisted Evolutionary Search for Programmatic Control Policies

ICLR 2026poster

Deep reinforcement learning has achieved impressive success in control tasks. However, its policies, represented as opaque neural networks, are often difficult for humans to understand, verify, and debug, which undermines trust and hinders real-world deployment. This work addresses this challenge by…

Cited by 0SourcecodeScholar
2026

NavForesee: A Unified Vision-Language World Model for Hierarchical Planning and Dual-Horizon Navigation Prediction

CVPR 2026

Embodied navigation for long-horizon tasks, guided by complex natural language instructions, remains a formidable challenge in artificial intelligence. Existing agents often struggle with robust long-term planning about unseen environments, leading to high failure rates. To address these limitations

Cited by 0SourceScholar
2026

PARAGSE: PARALLEL GENERATIVE SPEECH ENHANCEMENT WITH GROUP-VECTOR-QUANTIZATION-BASED NEURAL SPEECH CODEC

ICASSP 2026poster

Recently, generative speech enhancement has garnered considerable interest; however, existing approaches are hindered by excessive complexity, limited efficiency, and suboptimal speech quality. To overcome these challenges, this paper proposes a novel parallel generative speech enhancement (ParaGSE)…

Cited by 0SourcePDFScholar
2025

AutoPeel: Adhesion-Aware Safe Peeling Trajectory Optimization for Robotic Wound Care

ICRA 2025

Chronic wounds, including diabetic ulcers, pressure ulcers, and ulcers secondary to venous hypertension, affects more than 6.5 million patients and a yearly cost of more than $25 billion in the United States alone. Chronic wound treatment is currently a manual process, and we envision a future where

Cited by 2SourceScholar
2025

Autonomous Image-to-Grasp Robotic Suturing Using Reliability-Driven Suture Thread Reconstruction

RA-L 2025

Automating suturing during robotically-assisted surgery reduces the burden on the operating surgeon, enabling them to focus on making higher-level decisions rather than fatiguing themselves in the numerous intricacies of a surgical procedure. Accurate suture thread reconstruction and grasping are vi

Cited by 10SourceScholar
2025

CaDA: Cross-Problem Routing Solver with Constraint-Aware Dual-Attention

ICML 2025poster

Vehicle routing problems (VRPs) are significant combinatorial optimization problems (COPs) holding substantial practical importance. Recently, neural combinatorial optimization (NCO), which involves training deep learning models on extensive data to learn vehicle routing heuristics, has emerged as a…

2025

DeFine: Decision-Making with Analogical Reasoning over Factor Profiles

ACL 2025finding

LLMs are ideal for decision-making thanks to their ability to reason over long contexts. However, challenges arise when processing speech transcripts that describe complex scenarios, as they are verbose and include repetition, hedging, and vagueness. E.g., during a company’s earnings call, an execut…

Cited by 0SourcePDFScholar
2025

Enhancing Character-Level Understanding in LLMs through Token Internal Structure Learning

ACL 2025long

Tokenization methods like Byte-Pair Encoding (BPE) enhance computational efficiency in large language models (LLMs) but often obscure internal character structures within tokens. This limitation hinders LLMs’ ability to predict precise character positions, which is crucial in tasks like Chinese Spel…

2025

Few for Many: Tchebycheff Set Scalarization for Many-Objective Optimization

ICLR 2025poster

Multi-objective optimization can be found in many real-world applications where some conflicting objectives can not be optimized by a single solution. Existing optimization methods often focus on finding a set of Pareto solutions with different optimal trade-offs among the objectives. However, the r…

Cited by 4SourcePDFScholar
2025

LLM-enhanced Score Function Evolution for Causal Structure Learning

IJCAI 2025

Causal structure learning (CSL) plays a pivotal role in causality and is often formulated as an optimization problem within score-and-search methods. Under the assumption of an infinite dataset and a predefined distribution, several well-established and consistent score functions have been shown to

2025

Learning to Insert for Constructive Neural Vehicle Routing Solver

NeurIPS 2025poster

Neural Combinatorial Optimisation (NCO) is a promising learning-based approach for solving Vehicle Routing Problems (VRPs) without extensive manual design. While existing constructive NCO methods typically follow an appending-based paradigm that sequentially adds unvisited nodes to partial solutions…

Cited by 0SourcecodeScholar
2025

MEDiC: Autonomous Surgical Robotic Assistance to Maximizing Exposure for Dissection and Cautery

ICRA 2025

Surgical automation has the capability to improve the consistency of patient outcomes and broaden access to advanced surgical care in underprivileged communities. Shared autonomy, where the robot automates routine subtasks while the surgeon retains partial teleoperative control, offers great potenti

Cited by 6SourceScholar
2025

MOS-Attack: A Scalable Multi-objective Adversarial Attack Framework

CVPR 2025poster

Crafting adversarial examples is crucial for evaluating and enhancing the robustness of Deep Neural Networks (DNNs), presenting a challenge equivalent to maximizing a non-differentiable 0-1 loss function. However, existing single objective methods, namely adversarial attacks focus on a surrogate…

2025

Multi-Objective Evolution of Heuristic Using Large Language Model

AAAI 2025technical

Heuristics are commonly used to tackle various search and optimization problems. Design heuristics usually require tedious manual crafting with domain knowledge. Recent works have incorporated Large Language Models (LLMs) into automatic heuristic search, leveraging their powerful language and coding…

2025

OmniStyle: Filtering High Quality Style Transfer Data at Scale

CVPR 2025poster

In this paper, we introduce OmniStyle-1M, a large-scale paired style transfer dataset comprising over one million content-style-stylized image triplets across 1,000 diverse style categories, each enhanced with textual descriptions and instruction prompts. We show that OmniStyle-1M can not only impro…

Cited by 0SourcePDFScholar
2025

PlanGenLLMs: A Modern Survey of LLM Planning Capabilities

ACL 2025long

LLMs have immense potential for generating plans, transforming an initial world state into a desired goal state. A large body of research has explored the use of LLMs for various planning tasks, from web navigation to travel planning and database querying. However, many of these systems are tailored…

Cited by 0SourcePDFScholar
2025

STRUX: An LLM for Decision-Making with Structured Explanations

NAACL 2025short

Countless decisions shape our lives, and it is crucial to understand the how and why behind them. In this paper, we introduce a new LLM decision-making framework called STRUX, which enhances LLM decision-making by providing structured explanations. These include favorable and adverse facts related t…

Cited by 2SourcePDFScholar
2025

When SparseMoE Meets Noisy Interactions: An Ensemble View on Denoising Recommendation

ICASSP 2025accepted

Learning user preferences from implicit feedback is one of the core challenges in recommendation. The difficulty lies in the potential noise within implicit feedback. Therefore, various denoising recommendation methods have been proposed recently. However, most of them overly rely on the hyperparame…

Cited by 0SourceScholar
2025

XFormParser: A Simple and Effective Multimodal Multilingual Semi-structured Form Parser

COLING 2025main

In the domain of Document AI, parsing semi-structured image form is a crucial Key Information Extraction (KIE) task. The advent of pre-trained multimodal models significantly empowers Document AI frameworks to extract key information from form documents in different formats such as PDF, Word, and im…

2024

Achieving Autonomous Cloth Manipulation with Optimal Control via Differentiable Physics-Aware Regularization and Safety Constraints

ICRA 2024poster

Cloth manipulation is a category of deformable object manipulation of great interest to the robotics community, from applications of automated laundry-folding and home organizing to textiles and flexible manufacturing. Despite the desire for automated cloth manipulation, the thin-shell dynamics and…

Cited by 3SourceScholar
2024

Evolution of Heuristics: Towards Efficient Automatic Algorithm Design Using Large Language Model

ICML 2024oral

Heuristics are widely used for dealing with complex search and optimization problems. However, manual design of heuristics can be often very labour extensive and requires rich working experience and knowledge. This paper proposes Evolution of Heuristic (EoH), a novel evolutionary paradigm that lever…

2024

Factuality of Large Language Models: A Survey

EMNLP 2024main

Large language models (LLMs), especially when instruction-tuned for chat, have become part of our daily lives, freeing people from the process of searching, extracting, and integrating information from multiple sources by offering a straightforward answer to a variety of questions in a single place.…

Cited by 10SourcePDFScholar
2024

Identifying Factual Inconsistencies in Summaries: Grounding LLM Inference via Task Taxonomy

EMNLP 2024finding

Factual inconsistencies pose a significant hurdle for the faithful summarization by generative models. While a major direction to enhance inconsistency detection is to derive stronger Natural Language Inference (NLI) models, we propose an orthogonal aspect that underscores the importance of incorpor…

2024

InFoBench: Evaluating Instruction Following Ability in Large Language Models

ACL 2024findings

This paper introduces the Decomposed Requirements Following Ratio (DRFR), a new metric for evaluating Large Language Models’ (LLMs) ability to follow instructions. Addressing a gap in current methodologies, DRFR breaks down complex instructions into simpler criteria, facilitating a detailed analysis…

2024

JIGGLE: An Active Sensing Framework for Boundary Parameters Estimation in Deformable Surgical Environments

RSS 2024poster

Surgical automation can improve the accessibility and consistency of life-saving procedures. Most surgeries require separating layers of tissue to access the surgical site, and suturing to re-attach incisions. These tasks involve deformable manipula- tion to safely identify and alter tissue attachme…

Cited by 6SourcePDFScholar
2024

LLMs Assist NLP Researchers: Critique Paper (Meta-)Reviewing

EMNLP 2024main

Claim: This work is not advocating the use of LLMs for paper (meta-)reviewing. Instead, wepresent a comparative analysis to identify and distinguish LLM activities from human activities. Two research goals: i) Enable better recognition of instances when someone implicitly uses LLMs for reviewing act…

2024

Multiobjective Lipschitz Bandits under Lexicographic Ordering

AAAI 2024technical

This paper studies the multiobjective bandit problem under lexicographic ordering, wherein the learner aims to simultaneously maximize ? objectives hierarchically. The only existing algorithm for this problem considers the multi-armed bandit model, and its regret bound is O((KT)^(2/3)) under a metri…

Cited by 3SourcePDFScholar
2024

Prompt Learning for Generalized Vehicle Routing

IJCAI 2024poster

Neural combinatorial optimization (NCO) is a promising learning-based approach to solving various vehicle routing problems without much manual algorithm design. However, the current NCO methods mainly focus on the in-distribution performance, while the real-world problem instances usually come from…

2024

Real-to-Sim Deformable Object Manipulation: Optimizing Physics Models with Residual Mappings for Robotic Surgery

ICRA 2024poster

Accurate deformable object manipulation (DOM) is essential for achieving autonomy in robotic surgery, where soft tissues are being displaced, stretched, and dissected. Many DOM methods can be powered by simulation, which ensures realistic deformation by adhering to the governing physical constraints…

Cited by 9SourceScholar
2024

Robust Surgical Tool Tracking with Pixel-based Probabilities for Projected Geometric Primitives

ICRA 2024poster

Controlling robotic manipulators via visual feedback requires a known coordinate frame transformation between the robot and the camera. Uncertainties in mechanical systems as well as camera calibration create errors in this coordinate frame transformation. These errors result in poor localization of…

Cited by 2SourceScholar
2024

Smooth Tchebycheff Scalarization for Multi-Objective Optimization

ICML 2024poster

Multi-objective optimization problems can be found in many real-world applications, where the objectives often conflict each other and cannot be optimized by a single solution. In the past few decades, numerous methods have been proposed to find Pareto solutions that represent optimal trade-offs amo…

2024

SportsMetrics: Blending Text and Numerical Data to Understand Information Fusion in LLMs

ACL 2024long

Large language models hold significant potential for integrating various data types, such as text documents and database records, for advanced analytics. However, blending text and numerical data presents substantial challenges. LLMs need to process and cross-reference entities and numbers, handle d…

Cited by 8SourcePDFScholar
2024

SuPerPM: A Surgical Perception Framework Based on Deep Point Matching Learned from Physical Constrained Simulation Data

IROS 2024poster

A major source of endoscopic tissue tracking errors during deformations stems from wrong data association between observed sensor measurements with previously tracked scene. To mitigate this issue, we present a surgical perception framework, SuPerPM, that leverages learning-based non-rigid point clo…

Cited by 2SourceScholar
2024

When Reasoning Meets Information Aggregation: A Case Study with Sports Narratives

EMNLP 2024main

Reasoning is most powerful when an LLM accurately aggregates relevant information. We examine the critical role of information aggregation in reasoning by requiring the LLM to analyze sports narratives. To succeed at this task, an LLM must infer points from actions, identify related entities, attrib…

2023

6D Pose Estimation Based on 3D Edge Binocular Reprojection Optimization for Robotic Assembly

RA-L 2023

Accurate 6D pose estimation of object is important for robot assembly. This letter presents a novel method for achieving high precision 6D pose estimation by exploiting the reprojection of 3D edges onto binocular RGB image pairs. Our proposed method encompasses three phases: detection, pose initiali

Cited by 9SourceScholar
2023

DAMP: Doubly Aligned Multilingual Parser for Task-Oriented Dialogue

ACL 2023long

Modern virtual assistants use internal semantic parsing engines to convert user utterances to actionable commands. However, prior work has demonstrated multilingual models are less robust for semantic parsing compared to other tasks. In global markets such as India and Latin America, robust multilin…

2023

DecipherPref: Analyzing Influential Factors in Human Preference Judgments via GPT-4

EMNLP 2023long main

Human preference judgments are pivotal in guiding large language models (LLMs) to produce outputs that align with human values. Human evaluations are also used in summarization tasks to compare outputs from various systems, complementing existing automatic metrics. Despite their significance, howeve…

Cited by 0SourceScholar
2023

Disentangling Cognitive Diagnosis with Limited Exercise Labels

NeurIPS 2023poster

Cognitive diagnosis is an important task in intelligence education, which aims at measuring students’ proficiency in specific knowledge concepts. Given a fully labeled exercise-concept matrix, most existing models focused on mining students' response records for cognitive diagnosis. Despite their su…

2023

Generating User-Engaging News Headlines

ACL 2023long

The potential choices for news article headlines are enormous, and finding the right balance between conveying the essential message and capturing the reader’s attention is key to effective headlining. However, presenting the same news headline to all readers is a suboptimal strategy, because it doe…

Cited by 14SourcePDFScholar
2023

Image-based Pose Estimation and Shape Reconstruction for Robot Manipulators and Soft, Continuum Robots via Differentiable Rendering

ICRA 2023poster

State estimation from measured data is crucial for robotic applications as autonomous systems rely on sensors to capture the motion and localize in the 3D world. Among sensors that are designed for measuring a robot's pose, or for soft robots, their shape, vision sensors are favorable because they a…

Cited by 26SourceScholar
2023

MeetingBank: A Benchmark Dataset for Meeting Summarization

ACL 2023long

As the number of recorded meetings increases, it becomes increasingly important to utilize summarization technology to create useful summaries of these recordings. However, there is a crucial lack of annotated meeting corpora for developing this technology, as it can be hard to collect meetings, esp…

2023

Neural Combinatorial Optimization with Heavy Decoder: Toward Large Scale Generalization

NeurIPS 2023poster

Neural combinatorial optimization (NCO) is a promising learning-based approach for solving challenging combinatorial optimization problems without specialized algorithm design by experts. However, most constructive NCO methods cannot solve problems with large-scale instance sizes, which significantl…

2023

Robotic Manipulation of Deformable Rope-Like Objects Using Differentiable Compliant Position-Based Dynamics

RA-L 2023

Robot manipulation of rope-like objects is an interesting problem with some critical applications, such as autonomous robotic suturing. Solving for and controlling rope is difficult due to the complexity of rope physics and the challenge of building fast and accurate models of deformable materials.

Cited by 49SourceScholar
2023

Suture Thread Spline Reconstruction from Endoscopic Images for Robotic Surgery with Reliability-driven Keypoint Detection

ICRA 2023poster

Automating the process of manipulating and delivering sutures during robotic surgery is a prominent problem at the frontier of surgical robotics, as automating this task can significantly reduce surgeons' fatigue during tele-operated surgery and allow them to spend more time addressing higher-level…

Cited by 9SourcecodeScholar
2022

Generation of Patient After-Visit Summaries to Support Physicians

COLING 2022main

An after-visit summary (AVS) is a summary note given to patients after their clinical visit. It recaps what happened during their clinical visit and guides patients’ disease self-management. Studies have shown that a majority of patients found after-visit summaries useful. However, many physicians f…

2022

Learning as Conversation: Dialogue Systems Reinforced for Information Acquisition

NAACL 2022long

We propose novel AI-empowered chat bots for learning as conversation where a user does not read a passage but gains information and knowledge through conversation with a teacher bot. Our information acquisition-oriented dialogue system employs a novel adaptation of reinforced self-play so that the s…

2022

Lidar Point Cloud Guided Monocular 3D Object Detection

ECCV 2022poster

"Monocular 3D object detection is a challenging task in the self-driving and computer vision community. As a common practice, most previous works use manually annotated 3D box labels, where the annotating process is expensive. In this paper, we find that the precisely and carefully annotated labels…

2022

Toward Unifying Text Segmentation and Long Document Summarization

EMNLP 2022main

Text segmentation is important for signaling a document’s structure. Without segmenting a long document into topically coherent sections, it is difficult for readers to comprehend the text, let alone find important information. The problem is only exacerbated by a lack of segmentation in transcripts…

2022

Towards Abstractive Grounded Summarization of Podcast Transcripts

ACL 2022long

Podcasts have shown a recent rise in popularity. Summarization of podcasts is of practical benefit to both content providers and consumers. It helps people quickly decide whether they will listen to a podcast and/or reduces the cognitive load of content providers to write summaries. Nevertheless, po…

2021

A New Approach to Overgenerating and Scoring Abstractive Summaries

NAACL 2021long

We propose a new approach to generate multiple variants of the target summary with diverse content and varying lengths, then score and select admissible ones according to users’ needs. Abstractive summarizers trained on single reference summaries may struggle to produce outputs that achieve multiple…

2021

Autonomous Robotic Suction to Clear the Surgical Field for Hemostasis Using Image-Based Blood Flow Detection

RA-L 2021

Autonomous robotic surgery has seen significant progression over the last decade with the aims of reducing surgeon fatigue, improving procedural consistency, and perhaps one day take over surgery itself. However, automation has not been applied to the critical surgical task of controlling tissue and

Cited by 47SourceScholar
2021

CATE: Computation-aware Neural Architecture Encoding with Transformers

ICML 2021oral

Recent works (White et al., 2020a; Yan et al., 2020) demonstrate the importance of architecture encodings in Neural Architecture Search (NAS). These encodings encode either structure or computation information of the neural architectures. Compared to structure-aware encodings, computation-aware enco…

2021

HAIR: Hierarchical Visual-Semantic Relational Reasoning for Video Question Answering

ICCV 2021poster

Relational reasoning is at the heart of video question answering. However, existing approaches suffer from several common limitations: (1) they only focus on either object-level or frame-level relational reasoning, and fail to integrate the both; and (2) they neglect to leverage semantic knowledge f…

Cited by 62PDFcodeScholar
2021

Model-Predictive Control of Blood Suction for Surgical Hemostasis using Differentiable Fluid Simulations

ICRA 2021poster

Recent developments in surgical robotics have led to new advancements in the automation of surgical sub-tasks such as suturing, soft tissue manipulation, tissue tensioning and cutting. However, integration of dynamics to optimize these control policies for the variety of scenes encountered in surger…

Cited by 18SourceScholar
2021

Real-to-Sim Registration of Deformable Soft Tissue with Position-Based Dynamics for Surgical Robot Autonomy

ICRA 2021poster

Autonomy in robotic surgery is very challenging in unstructured environments, especially when interacting with deformable soft tissues. The main difficulty is to generate model-based control methods that account for deformation dynamics during tissue manipulation. Previous works in vision-based perc…

Cited by 48SourceScholar
2021

StreamHover: Livestream Transcript Summarization and Annotation

EMNLP 2021main

With the explosive growth of livestream broadcasting, there is an urgent need for new summarization technology that enables us to create a preview of streamed content and tap into this wealth of knowledge. However, the problem is nontrivial due to the informal nature of spoken language. Further, the…

2020

Dynamically Constrained Motion Planning Networks for Non-Holonomic Robots

IROS 2020poster

Reliable real-time planning for robots is essential in today's rapidly expanding automated ecosystem. In such environments, traditional methods that plan by relaxing constraints become unreliable or slow-down for kinematically constrained robots. This paper describes the algorithm Dynamic Motion Pla…

Cited by 36SourceScholar
2020

How Domain Terminology Affects Meeting Summarization Performance

COLING 2020main

Meetings are essential to modern organizations. Numerous meetings are held and recorded daily, more than can ever be comprehended. A meeting summarization system that identifies salient utterances from the transcripts to automatically generate meeting minutes can help. It empowers users to rapidly s…

2018

End-to-end View Synthesis for Light Field Imaging with Pseudo 4DCNN

ECCV 2018poster

Limited angular resolution has become the main bottleneck of microlens-based plenoptic cameras towards practical vision applications. Existing view synthesis methods mainly break the task into two steps, i.e. depth estimating and view warping, which are usually inefficient and produce artifacts over…

Cited by 139SourcePDFScholar
2016

An energy based approach for passive dual-user haptic training systems

IROS 2016poster

This paper introduces a new controller for dual-user training systems, designed by way of an energy based approach. Dual-user training systems are useful for supervised hands-on training when a trainer shows the right gestures to a trainee and where the forces to apply on the tools are difficult to…

Cited by 12SourceScholar