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Fan Liu

32 accepted papers

2026

AirNavigation: Let UAV Navigation Tell Its Own Story

AAAI 2026technical

Testing autonomous navigation algorithms of Unmanned Aerial Vehicles (UAVs) in real-world scenarios often entails significant safety risks. In this paper, we aim to build a flexible yet user-friendly UAV autonomous navigation simulator. Ideally, it should closely emulate real-world environments, sup

Cited by 0SourcePDFScholar
2026

Discrete-Periodic Ambiguity Function of Random Communication Signals

ICASSP 2026oral

This paper investigates the ambiguity function (AF) of communication signals carrying random data payloads, which is a fundamental metric characterizing sensing capability in ISAC systems. We first develop a unified analytical framework to evaluate the AF of communication-centric ISAC signals constr…

Cited by 0SourcePDFScholar
2026

Distilling Unsigned Distance Function for Surface Reconstruction from 3D Gaussian Splatting

CVPR 2026

Unsigned distance fields (UDFs) are well suited for representing open surfaces, but learning them from multi-view images is challenging because ground-truth surfaces are unavailable for supervision in most cases and the gradient of a UDF is undefined on the underlying surface. Prior methods optimize

Cited by 0SourceScholar
2026

Progressive Guessing to Fixed Point: Rethinking Human Motion Prediction with Deep Equilibrium Models

CVPR 2026

Many recent human motion prediction methods adopt a multi-stage refinement framework, where each stage produces an initial guess of future poses for the next stage. These guesses are progressively refined towards the target prediction through a sequence of spatial-temporal reasoning stages.However,

Cited by 0SourceScholar
2026

RemoteReasoner: Towards Unifying Geospatial Reasoning Workflow

AAAI 2026technical

Remote sensing imagery presents vast, inherently unstructured spatial data, necessitating sophisticated reasoning to interpret complex user intents and contextual relationships beyond simple recognition tasks. In this paper, we aim to construct an Earth observation workflow to handle complex queries

Cited by 0SourcePDFScholar
2025

Chain-of-Talkers (CoTalk): Fast Human Annotation of Dense Image Captions

EMNLP 2025

While densely annotated image captions significantly facilitate the learning of robust vision-language alignment, methodologies for systematically optimizing human annotation efforts remain underexplored. We introduce Chain-of-Talkers (CoTalk), an AI-in-the-loop methodology designed to maximize the

Cited by 0SourcePDFScholar
2025

CoRe-MMRAG: Cross-Source Knowledge Reconciliation for Multimodal RAG

ACL 2025long

Multimodal Retrieval-Augmented Generation (MMRAG) has been introduced to enhance Multimodal Large Language Models by incorporating externally retrieved multimodal knowledge, but it introduces two challenges: Parametric-Retrieved Knowledge Inconsistency (PRKI), where discrepancies between parametric…

2025

Foundation Models for Scientific Discovery: From Paradigm Enhancement to Paradigm Transition

NeurIPS 2025poster

Foundation models (FMs), such as GPT-4 and AlphaFold, are reshaping the landscape of scientific research. Beyond accelerating tasks such as hypothesis generation, experimental design, and result interpretation, they prompt a more fundamental question: Are FMs merely enhancing existing scientific met…

Cited by 0SourceScholar
2025

MM-Agent: LLM as Agents for Real-world Mathematical Modeling Problem

NeurIPS 2025poster

Mathematical modeling is a cornerstone of scientific discovery and engineering practice, enabling the translation of real-world problems into formal systems across domains such as physics, biology, and economics. Unlike mathematical reasoning, which assumes a predefined formulation, modeling require…

Cited by 0SourcecodeScholar
2025

Making Large Vision Language Models to Be Good Few-Shot Learners

AAAI 2025technical

Few-shot classification (FSC) is a fundamental yet challenging task in computer vision that involves recognizing novel classes from limited data. While previous methods have focused on enhancing visual features or incorporating additional modalities, Large Vision Language Models (LVLMs) offer a prom…

2025

PEToolLLM: Towards Personalized Tool Learning in Large Language Models

ACL 2025finding

Tool learning has emerged as a promising direction by extending Large Language Models’ (LLMs) capabilities with external tools. Existing tool learning studies primarily focus on the general-purpose tool-use capability, which addresses explicit user requirements in instructions. However, they overloo…

2025

Prompting DirectSAM for Semantic Contour Extraction in Remote Sensing Images

ICASSP 2025accepted

The Direct Segment Anything Model (DirectSAM) excels in class-agnostic contour extraction. In this paper, we explore its use by applying it to optical remote sensing imagery, where semantic contour extraction—such as identifying buildings, road networks, and coastlines-holds significant practical va…

Cited by 0SourceScholar
2025

RemoteTrimmer: Adaptive Structural Pruning for Remote Sensing Image Classification

ICASSP 2025accepted

Since high resolution remote sensing image classifi-cation often requires a relatively high computation complexity, lightweight models tend to be practical and efficient. Model pruning is an effective method for model compression. However, existing methods rarely take into account the specificity of…

Cited by 0SourceScholar
2025

TP-RAG: Benchmarking Retrieval-Augmented Large Language Model Agents for Spatiotemporal-Aware Travel Planning

EMNLP 2025

Large language models (LLMs) have shown promise in automating travel planning, yet they often fall short in addressing nuanced spatiotemporal rationality. While existing benchmarks focus on basic plan validity, they neglect critical aspects such as route efficiency, POI appeal, and real-time adaptab

2024

Generalized Deterministic-Random Tradeoff of Integrated Sensing and Communications: The Sensing-Optimal Operating Point

ICASSP 2024accepted

Integrated sensing and communications (ISAC) has been recognized as a key component in the envisioned 6G communication systems. Understanding the fundamental performance tradeoff between sensing and communication functionalities is essential for designing practical cost-efficient ISAC systems. In th…

Cited by 0SourceScholar
2024

Globally Optimal Beamforming Design for Integrated Sensing and Communication Systems

ICASSP 2024accepted

In this paper, we propose a multi-input multi-output beamforming transmit optimization model for joint radar sensing and multi-user communications, where the design of the beamformers is formulated as an optimization problem whose objective is a weighted combination of the sum rate and the Cramér-Ra…

Cited by 0SourceScholar
2024

Locality-Enhanced Transformer for Semantic Segmentation of High-Resolution Remote Sensing Images

ICASSP 2024accepted

Transformers have emerged as a transformative tool in various computer vision tasks, excelling at capturing long-range dependencies. Their potential applicability and scalability in the interpretation of high-resolution remote sensing images (HRRSIs) have thus garnered substantial interest. However,…

Cited by 0SourceScholar
2024

Single Image Unlearning: Efficient Machine Unlearning in Multimodal Large Language Models

NeurIPS 2024poster

Machine unlearning (MU) empowers individuals with the `right to be forgotten' by removing their private or sensitive information encoded in machine learning models. However, it remains uncertain whether MU can be effectively applied to Multimodal Large Language Models (MLLMs), particularly in scenar…

Cited by 8SourcePDFScholar
2023

Few-shot Classification via Ensemble Learning with Multi-Order Statistics

IJCAI 2023poster

Transfer learning has been widely adopted for few-shot classification. Recent studies reveal that obtaining good generalization representation of images on novel classes is the key to improving the few-shot classification accuracy. To address this need, we prove theoretically that leveraging ensembl…

Cited by 9SourcePDFScholar
2022

Cramér-Rao Bound and Antenna Selection Optimization for Dual Radar-Communication Design

ICASSP 2022accepted

We consider multi-input multi-output (MIMO) dual function radar communication (DFRC) systems, and design a transmit beamforming matrix that optimizes a weighted combination of the radar estimate Cramer-Rao bound (CRB) and the communication rate. A hybrid beamforming structure is considered, with few…

Cited by 0SourceScholar
2022

Safeguarding UAV Networks through Integrated Sensing, Jamming, and Communications

ICASSP 2022accepted

This paper proposes an integrated sensing, jamming, and communications (ISJC) framework for securing unmanned aerial vehicle (UAV)-enabled wireless networks. The proposed framework advocates the dual use of artificial noise transmitted by an information UAV for simultaneous jamming and sensing of an…

Cited by 0SourceScholar
2021

Joint Localization and Predictive Beamforming in Vehicular Networks: Power Allocation Beyond Water-Filling

ICASSP 2021accepted

This paper explores tailored power allocation (PA) for dual functional radar-communication (DFRC) in the vehicle-to-infrastructure (V2I) network, where a road side unit (RSU) provides both localization and communication services to multiple vehicles. Going beyond classical communications-optimal wat…

Cited by 0SourceScholar
2021

Learning to Select for Mimo Radar Based on Hybrid Analog-Digital Beamforming

ICASSP 2021accepted

In this paper, we propose an energy-efficient radar beampattern design framework for Millimeter Wave (mmWave) massive multi-input multi-output (mMIMO) systems, equipped with a hybrid analog-digital (HAD) beamforming structure. Aiming to reduce the power consumption and hardware cost of the mMIMO sys…

Cited by 0SourceScholar
2020

Near-Optimal Interference Exploitation 1-Bit Massive MIMO Precoding Via Partial Branch-and-Bound

ICASSP 2020accepted

In this paper, we focus on 1-bit precoding for large-scale antenna systems in the downlink based on the concept of constructive interference (CI). By formulating the optimization problem that aims to maximize the CI effect subject to the 1-bit constraint on the transmit signals, we mathematically pr…

Cited by 0SourceScholar
2019

A LSTM and CNN Based Assemble Neural Network Framework for Arrhythmias Classification

ICASSP 2019accepted

This paper puts forward a LSTM and CNN based assemble neural network framework to distinguish different types of arrhythmias by integrating stacked bidirectional long shot-term memory (SB-LSTM) network and two-dimensional convolutional neural network (TD-CNN). Particularly, SB-LSTM is used to mine t…

Cited by 0SourceScholar
2019

Hybrid Beamforming with Sub-arrayed MIMO Radar: Enabling Joint Sensing and Communication at mmWave Band

ICASSP 2019accepted

In this paper, we propose a beamforming design for dual-functional radar-communication (DFRC) systems at the mil-limeter wave (mmWave) band, where hybrid beamforming and sub-arrayed MIMO radar techniques are jointly exploited. We assume that a base station (BS) is serving a multi-antenna user equipm…

Cited by 0SourceScholar