← Search

Lingfei Wu

35 accepted papers

2025

Uncovering LLM-Generated Code: A Zero-Shot Synthetic Code Detector via Code Rewriting

AAAI 2025technical

Large Language Models (LLMs) have demonstrated remarkable proficiency in generating code. However, the misuse of LLM-generated (synthetic) code has raised concerns in both educational and industrial contexts, underscoring the urgent need for synthetic code detectors. Existing methods for detecting s…

Cited by 4SourcePDFScholar
2024

AdaCCD: Adaptive Semantic Contrasts Discovery Based Cross Lingual Adaptation for Code Clone Detection

AAAI 2024technical

Code Clone Detection, which aims to retrieve functionally similar programs from large code bases, has been attracting increasing attention. Modern software often involves a diverse range of programming languages. However, current code clone detection methods are generally limited to only a few popul…

2024

FAC2E: Better Understanding Large Language Model Capabilities by Dissociating Language and Cognition

EMNLP 2024main

Large language models (LLMs) are primarily evaluated by overall performance on various text understanding and generation tasks. However, such a paradigm fails to comprehensively differentiate the fine-grained language and cognitive skills, rendering the lack of sufficient interpretation to LLMs’ cap…

2024

KG-TREAT: Pre-training for Treatment Effect Estimation by Synergizing Patient Data with Knowledge Graphs

AAAI 2024technical

Treatment effect estimation (TEE) is the task of determining the impact of various treatments on patient outcomes. Current TEE methods fall short due to reliance on limited labeled data and challenges posed by sparse and high-dimensional observational patient data. To address the challenges, we intr…

2024

Tram: A Token-level Retrieval-augmented Mechanism for Source Code Summarization

NAACL 2024findings

Automatically generating human-readable text describing the functionality of a program is the intent of source code summarization. Although neural language models achieve significant performance in this field, they are limited by their inability to access external knowledge. To address this limitati…

2023

CP-BCS: Binary Code Summarization Guided by Control Flow Graph and Pseudo Code

EMNLP 2023long main

Automatically generating function summaries for binaries is an extremely valuable but challenging task, since it involves translating the execution behavior and semantics of the low-level language (assembly code) into human-readable natural language. However, most current works on understanding asse…

Cited by 0SourcecodeScholar
2023

Human-Instructed Deep Hierarchical Generative Learning for Automated Urban Planning

AAAI 2023technical

The essential task of urban planning is to generate the optimal land-use configuration of a target area. However, traditional urban planning is time-consuming and labor-intensive. Deep generative learning gives us hope that we can automate this planning process and come up with the ideal urban plans…

Cited by 20SourcePDFScholar
2023

SkillQG: Learning to Generate Question for Reading Comprehension Assessment

ACL 2023findings

We present SkillQG: a question generation framework with controllable comprehension types for assessing and improving machine reading comprehension models. Existing question generation systems widely differentiate questions by literal information such as question words and answer types to generate s…

Cited by 4SourcePDFScholar
2023

T2-GNN: Graph Neural Networks for Graphs with Incomplete Features and Structure via Teacher-Student Distillation

AAAI 2023technical

Graph Neural Networks (GNNs) have been a prevailing technique for tackling various analysis tasks on graph data. A key premise for the remarkable performance of GNNs relies on complete and trustworthy initial graph descriptions (i.e., node features and graph structure), which is often not satisfied…

Cited by 44SourcePDFScholar
2022

Automatic Scene-based Topic Channel Construction System for E-Commerce

EMNLP 2022industry

Scene marketing that well demonstrates user interests within a certain scenario has proved effective for offline shopping. To conduct scene marketing for e-commerce platforms, this work presents a novel product form, scene-based topic channel which typically consists of a list of diverse products be…

2022

Feeding What You Need by Understanding What You Learned

ACL 2022long

Machine Reading Comprehension (MRC) reveals the ability to understand a given text passage and answer questions based on it. Existing research works in MRC rely heavily on large-size models and corpus to improve the performance evaluated by metrics such as Exact Match (EM) and F1. However, such a pa…

Cited by 4SourcePDFScholar
2022

Input-agnostic Certified Group Fairness via Gaussian Parameter Smoothing

ICML 2022spotlight

Only recently, researchers attempt to provide classification algorithms with provable group fairness guarantees. Most of these algorithms suffer from harassment caused by the requirement that the training and deployment data follow the same distribution. This paper proposes an input-agnostic certifi…

2022

Knowledge Distillation based Contextual Relevance Matching for E-commerce Product Search

EMNLP 2022industry

Online relevance matching is an essential task of e-commerce product search to boost the utility of search engines and ensure a smooth user experience. Previous work adopts either classical relevance matching models or Transformer-style models to address it. However, they ignore the inherent biparti…

2022

QRelScore: Better Evaluating Generated Questions with Deeper Understanding of Context-aware Relevance

EMNLP 2022main

Existing metrics for assessing question generation not only require costly human reference but also fail to take into account the input context of generation, rendering the lack of deep understanding of the relevance between the generated questions and input contexts. As a result, they may wrongly p…

Cited by 11SourcePDFScholar
2022

Robust Meta-learning with Sampling Noise and Label Noise via Eigen-Reptile

ICML 2022spotlight

Recent years have seen a surge of interest in meta-learning techniques for tackling the few-shot learning (FSL) problem. However, the meta-learner is prone to overfitting since there are only a few available samples, which can be identified as sampling noise on a clean dataset. Besides, when handlin…

2021

Adversarial Attack against Cross-lingual Knowledge Graph Alignment

EMNLP 2021main

Recent literatures have shown that knowledge graph (KG) learning models are highly vulnerable to adversarial attacks. However, there is still a paucity of vulnerability analyses of cross-lingual entity alignment under adversarial attacks. This paper proposes an adversarial attack model with two nove…

Cited by 17SourcePDFScholar
2021

Constructing contrastive samples via summarization for text classification with limited annotations

EMNLP 2021finding

Contrastive Learning has emerged as a powerful representation learning method and facilitates various downstream tasks especially when supervised data is limited. How to construct efficient contrastive samples through data augmentation is key to its success. Unlike vision tasks, the data augmentatio…

2021

Expressive 1-Lipschitz Neural Networks for Robust Multiple Graph Learning against Adversarial Attacks

ICML 2021spotlight

Recent findings have shown multiple graph learning models, such as graph classification and graph matching, are highly vulnerable to adversarial attacks, i.e. small input perturbations in graph structures and node attributes can cause the model failures. Existing defense techniques often defend spec…

Cited by 31SourcePDFScholar
2021

HAConvGNN: Hierarchical Attention Based Convolutional Graph Neural Network for Code Documentation Generation in Jupyter Notebooks

EMNLP 2021finding

Jupyter notebook allows data scientists to write machine learning code together with its documentation in cells. In this paper, we propose a new task of code documentation generation (CDG) for computational notebooks. In contrast to the previous CDG tasks which focus on generating documentation for…

2021

Learning to Generate Visual Questions with Noisy Supervision

NeurIPS 2021poster

The task of visual question generation (VQG) aims to generate human-like neural questions from an image and potentially other side information (e.g., answer type or the answer itself). Existing works often suffer from the severe one image to many questions mapping problem, which generates uninformat…

2021

Relation-aware Graph Attention Model with Adaptive Self-adversarial Training

AAAI 2021technical

This paper describes an end-to-end solution for the relationship prediction task in heterogeneous, multi-relational graphs. We particularly address two building blocks in the pipeline, namely heterogeneous graph representation learning and negative sampling. Existing message passing-based graph neur…

Cited by 31SourcePDFScholar
2021

Technical Question Answering across Tasks and Domains

NAACL 2021industry

Building automatic technical support system is an important yet challenge task. Conceptually, to answer a user question on a technical forum, a human expert has to first retrieve relevant documents, and then read them carefully to identify the answer snippet. Despite huge success the researchers hav…

2021

Timeline Summarization based on Event Graph Compression via Time-Aware Optimal Transport

EMNLP 2021main

Timeline Summarization identifies major events from a news collection and describes them following temporal order, with key dates tagged. Previous methods generally generate summaries separately for each date after they determine the key dates of events. These methods overlook the events’ intra-stru…

2021

Validating the Lottery Ticket Hypothesis with Inertial Manifold Theory

NeurIPS 2021poster

Despite achieving remarkable efficiency, traditional network pruning techniques often follow manually-crafted heuristics to generate pruned sparse networks. Such heuristic pruning strategies are hard to guarantee that the pruned networks achieve test accuracy comparable to the original dense ones. R…

Cited by 37SourcePDFScholar
2020

GraphFlow: Exploiting Conversation Flow with Graph Neural Networks for Conversational Machine Comprehension

IJCAI 2020poster

Conversational machine comprehension (MC) has proven significantly more challenging compared to traditional MC since it requires better utilization of conversation history. However, most existing approaches do not effectively capture conversation history and thus have trouble handling questions invo…

2020

Hierarchical Attention Based Spatial-Temporal Graph-to-Sequence Learning for Grounded Video Description

IJCAI 2020poster

The task of Grounded Video Description~(GVD) is to generate sentences whose objects can be grounded with the bounding boxes in the video frames. Existing works often fail to exploit structural information both in modeling the relationships among the region proposals and in attending them for text ge…

2020

Iterative Deep Graph Learning for Graph Neural Networks: Better and Robust Node Embeddings

NeurIPS 2020poster

In this paper, we propose an end-to-end graph learning framework, namely \textbf{I}terative \textbf{D}eep \textbf{G}raph \textbf{L}earning (\alg), for jointly and iteratively learning graph structure and graph embedding. The key rationale of \alg is to learn a better graph structure based on better…

2020

RDF-to-Text Generation with Graph-augmented Structural Neural Encoders

IJCAI 2020poster

The task of RDF-to-text generation is to generate a corresponding descriptive text given a set of RDF triples. Most of the previous approaches either cast this task as a sequence-to-sequence problem or employ graph-based encoder for modeling RDF triples and decode a text sequence. However, none of t…

2020

Reinforcement Learning Based Graph-to-Sequence Model for Natural Question Generation

ICLR 2020poster

Natural question generation (QG) aims to generate questions from a passage and an answer. Previous works on QG either (i) ignore the rich structure information hidden in text, (ii) solely rely on cross-entropy loss that leads to issues like exposure bias and inconsistency between train/test measurem…

Cited by 221SourcecodeScholar
2019

Fast Incremental von Neumann Graph Entropy Computation: Theory, Algorithm, and Applications

ICML 2019oral

The von Neumann graph entropy (VNGE) facilitates measurement of information divergence and distance between graphs in a graph sequence. It has been successfully applied to various learning tasks driven by network-based data. While effective, VNGE is computationally demanding as it requires the full…

2018

Quantized Densely Connected U-Nets for Efficient Landmark Localization

ECCV 2018poster

In this paper, we propose quantized densely connected U-Nets for efficient visual landmark localization. The idea is that features of the same semantic meanings are globally reused across the stacked U-Nets. This dense connectivity largely improves the information flow, yielding improved localizatio…

2018

Random Warping Series: A Random Features Method for Time-Series Embedding

AISTATS 2018poster

Time series data analytics has been a problem of substantial interests for decades, and Dynamic Time Warping (DTW) has been the most widely adopted technique to measure dissimilarity between time series. A number of global-alignment kernels have since been proposed in the spirit of DTW to extend its…

2016

Efficient one-vs-one kernel ridge regression for speech recognition

ICASSP 2016accepted

Recent evidences suggest that the performance of kernel methods may match that of deep neural networks (DNNs), which have been the state-of-the-art approach for speech recognition. In this work, we present an improvement of the kernel ridge regression studied in Huang et al., ICASSP 2014, and show t…

Cited by 0SourceScholar