Search Results for author: Chao Feng

Found 25 papers, 7 papers with code

基于层次注意力机制和门机制的属性级别情感分析(Aspect-level Sentiment Analysis Based on Hierarchical Attention and Gate Networks)

no code implementations CCL 2020 Chao Feng, Haihui Li, Hongya Zhao, Yun Xue, Jingyao Tang

近年来, 作为细粒度的属性级别情感分析在商业界和学术界受到越来越多的关注, 其目的在于识别一个句子中多个属性词所对应的情感极性。目前, 在解决属性级别情感分析问题的绝大多数工作都集中在注意力机制的设计上, 以此突出上下文和属性词中不同词对于属性级别情感分析的贡献, 同时使上下文和属性词之间相互关联。本文提出使用层次注意力机制和门机制处理属性级别情感分析任务, 在得到属性词的隐藏状态之后, 通过注意力机制得到属性词新的表示, 然后利用属性词新的表示和注意力机制进一步得到上下文新的表示, 层次注意力机制的设计使得上下文和属性词的表达更加准确;同时通过门机制选择对属性词而言上下文中有用的信息, 以此丰富上下文的表达, 在SemEval 2014 Task4和Twitter数据集上的实验结果表明本文提出模型的有效性。

Sentiment Analysis

FedEP: Tailoring Attention to Heterogeneous Data Distribution with Entropy Pooling for Decentralized Federated Learning

no code implementations10 Oct 2024 Chao Feng, Hongjie Guan, Alberto Huertas Celdrán, Jan von der Assen, Gérôme Bovet, Burkhard Stiller

Federated Learning (FL) performance is highly influenced by data distribution across clients, and non-Independent and Identically Distributed (non-IID) leads to a slower convergence of the global model and a decrease in model effectiveness.

Federated Learning

De-VertiFL: A Solution for Decentralized Vertical Federated Learning

no code implementations8 Oct 2024 Alberto Huertas Celdrán, Chao Feng, Sabyasachi Banik, Gerome Bovet, Gregorio Martinez Perez, Burkhard Stiller

Among the FL paradigm, horizontal FL, where clients share the same set of features but different data samples, has been extensively studied in both centralized and decentralized settings.

Privacy Preserving Vertical Federated Learning

Convolutional Beamspace Beamforming for Low-Complexity Far-Field and Near-Field MU-MIMO Communications

no code implementations2 Sep 2024 Chao Feng, Huizhi Wang, Yong Zeng

The commonly used linear processing schemes include the maximum-ratio combining (MRC), zero-forcing (ZF) and minimum mean squared error (MMSE) beamforming, which may result in the unfavorable performance or complexity as the antenna number grows.

Learning Deep Tree-based Retriever for Efficient Recommendation: Theory and Method

1 code implementation21 Aug 2024 Ze Liu, Jin Zhang, Chao Feng, Defu Lian, Jie Wang, Enhong Chen

Although advancements in deep learning have significantly enhanced the recommendation accuracy of deep recommendation models, these methods still suffer from low recommendation efficiency.

Binary Classification Multi-class Classification +1

NeuroBind: Towards Unified Multimodal Representations for Neural Signals

no code implementations19 Jul 2024 Fengyu Yang, Chao Feng, Daniel Wang, Tianye Wang, Ziyao Zeng, Zhiyang Xu, Hyoungseob Park, Pengliang Ji, Hanbin Zhao, Yuanning Li, Alex Wong

Understanding neural activity and information representation is crucial for advancing knowledge of brain function and cognition.

EEG

This&That: Language-Gesture Controlled Video Generation for Robot Planning

no code implementations8 Jul 2024 Boyang Wang, Nikhil Sridhar, Chao Feng, Mark Van der Merwe, Adam Fishman, Nima Fazeli, Jeong Joon Park

We propose a robot learning method for communicating, planning, and executing a wide range of tasks, dubbed This&That.

Video Generation

IFA: Interaction Fidelity Attention for Entire Lifelong Behaviour Sequence Modeling

no code implementations14 Jun 2024 Wenhui Yu, Chao Feng, Yanze Zhang, Lantao Hu, Peng Jiang, Han Li

The lifelong user behavior sequence provides abundant information of user preference and gains impressive improvement in the recommendation task, however increases computational consumption significantly.

Recommendation Systems

Vision-Flan: Scaling Human-Labeled Tasks in Visual Instruction Tuning

no code implementations18 Feb 2024 Zhiyang Xu, Chao Feng, Rulin Shao, Trevor Ashby, Ying Shen, Di Jin, Yu Cheng, Qifan Wang, Lifu Huang

Despite vision-language models' (VLMs) remarkable capabilities as versatile visual assistants, two substantial challenges persist within the existing VLM frameworks: (1) lacking task diversity in pretraining and visual instruction tuning, and (2) annotation error and bias in GPT-4 synthesized instruction tuning data.

Hallucination Visual Question Answering

Knowledge Solver: Teaching LLMs to Search for Domain Knowledge from Knowledge Graphs

no code implementations6 Sep 2023 Chao Feng, Xinyu Zhang, Zichu Fei

In some previous works, additional modules like graph neural networks (GNNs) are trained on retrieved knowledge from external knowledge bases, aiming to mitigate the problem of lacking domain-specific knowledge.

Hallucination Knowledge Graphs +2

CyberForce: A Federated Reinforcement Learning Framework for Malware Mitigation

no code implementations11 Aug 2023 Chao Feng, Alberto Huertas Celdran, Pedro Miguel Sanchez Sanchez, Jan Kreischer, Jan von der Assen, Gerome Bovet, Gregorio Martinez Perez, Burkhard Stiller

Recent research has shown that the integration of Reinforcement Learning (RL) with Moving Target Defense (MTD) can enhance cybersecurity in Internet-of-Things (IoT) devices.

Anomaly Detection Data Poisoning +4

RCVaR: an Economic Approach to Estimate Cyberattacks Costs using Data from Industry Reports

1 code implementation20 Jul 2023 Muriel Figueredo Franco, Fabian Künzler, Jan von der Assen, Chao Feng, Burkhard Stiller

Therefore, managing risk exposure and cybersecurity strategies is essential for digitized companies that want to survive in competitive markets.

Management

Fedstellar: A Platform for Decentralized Federated Learning

1 code implementation16 Jun 2023 Enrique Tomás Martínez Beltrán, Ángel Luis Perales Gómez, Chao Feng, Pedro Miguel Sánchez Sánchez, Sergio López Bernal, Gérôme Bovet, Manuel Gil Pérez, Gregorio Martínez Pérez, Alberto Huertas Celdrán

To overcome these challenges, this paper presents Fedstellar, a platform extended from p2pfl library and designed to train FL models in a decentralized, semi-decentralized, and centralized fashion across diverse federations of physical or virtualized devices.

Federated Learning

MTCSNN: Multi-task Clinical Siamese Neural Network for Diabetic Retinopathy Severity Prediction

1 code implementation14 Aug 2022 Chao Feng, Jui Po Hung, Aishan Li, Jieping Yang, Xinyu Zhang

The novelty of this project is to utilize the ordinal information among labels and add a new regression task, which can help the model learn more discriminative feature embedding for fine-grained classification tasks.

regression severity prediction

Reinforcement Routing on Proximity Graph for Efficient Recommendation

no code implementations23 Jan 2022 Chao Feng, Defu Lian, Xiting Wang, Zheng Liu, Xing Xie, Enhong Chen

Instead of searching the nearest neighbor for the query, we search the item with maximum inner product with query on the proximity graph.

Imitation Learning Recommendation Systems

AVA-AVD: Audio-Visual Speaker Diarization in the Wild

7 code implementations29 Nov 2021 Eric Zhongcong Xu, Zeyang Song, Satoshi Tsutsui, Chao Feng, Mang Ye, Mike Zheng Shou

Audio-visual speaker diarization aims at detecting "who spoke when" using both auditory and visual signals.

Relation Network speaker-diarization +1

Scalable Data Annotation Pipeline for High-Quality Large Speech Datasets Development

1 code implementation1 Sep 2021 Mingkuan Liu, Chi Zhang, Hua Xing, Chao Feng, Monchu Chen, Judith Bishop, Grace Ngapo

Our A/B testing and pilot results demonstrated the HITL pipeline can improve annotation speed and capacity by at least 80% and quality is comparable to or higher than manual double pass annotation.

Vocal Bursts Intensity Prediction

Exploiting Network Structures to Improve Semantic Representation for the Financial Domain

no code implementations FinNLP 2021 Chao Feng, Shi-jie We

This paper presents the participation of the MiniTrue team in the FinSim-3 shared task on learning semantic similarities for the financial domain in English language.

Knowledge Graph Embedding Knowledge Graph Embeddings

A Simple Voting Mechanism for Online Sexist Content Identification

no code implementations29 May 2021 Chao Feng

This paper presents the participation of the MiniTrue team in the EXIST 2021 Challenge on the sexism detection in social media task for English and Spanish.

Reinforced Product Metadata Selection for Helpfulness Assessment of Customer Reviews

no code implementations IJCNLP 2019 Miao Fan, Chao Feng, Mingming Sun, Ping Li

Given a product, a selector (agent) learns from both the keys in the product metadata and one of its reviews to take an action that selects the correct value, and a successive predictor (network) makes the free-text review attend to this value to obtain better neural representations for helpfulness assessment.

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