Search Results for author: Zhenpeng Chen

Found 14 papers, 6 papers with code

LLM-Powered Test Case Generation for Detecting Tricky Bugs

no code implementations16 Apr 2024 Kaibo Liu, Yiyang Liu, Zhenpeng Chen, Jie M. Zhang, Yudong Han, Yun Ma, Ge Li, Gang Huang

Conventional automated test generation tools struggle to generate test oracles and tricky bug-revealing test inputs.

Exploring the Impact of In-Browser Deep Learning Inference on Quality of User Experience and Performance

no code implementations8 Feb 2024 QiPeng Wang, Shiqi Jiang, Zhenpeng Chen, Xu Cao, Yuanchun Li, Aoyu Li, Ying Zhang, Yun Ma, Ting Cao, Xuanzhe Liu

Additionally, we noticed that in-browser inference increases the time it takes for graphical user interface (GUI) components to load in web browsers by a significant 67. 2\%, which severely impacts the overall QoE for users of web applications that depend on this technology.

Bias Behind the Wheel: Fairness Analysis of Autonomous Driving Systems

no code implementations5 Aug 2023 Xinyue Li, Zhenpeng Chen, Jie M. Zhang, Federica Sarro, Ying Zhang, Xuanzhe Liu

This paper analyzes fairness in automated pedestrian detection, a crucial but under-explored issue in autonomous driving systems.

Autonomous Driving Fairness +1

Fairness Improvement with Multiple Protected Attributes: How Far Are We?

1 code implementation25 Jul 2023 Zhenpeng Chen, Jie M. Zhang, Federica Sarro, Mark Harman

Existing research mostly improves the fairness of Machine Learning (ML) software regarding a single protected attribute at a time, but this is unrealistic given that many users have multiple protected attributes.

Attribute Fairness

A Comprehensive Empirical Study of Bias Mitigation Methods for Machine Learning Classifiers

2 code implementations7 Jul 2022 Zhenpeng Chen, Jie M. Zhang, Federica Sarro, Mark Harman

We find that (1) the bias mitigation methods significantly decrease ML performance in 53% of the studied scenarios (ranging between 42%~66% according to different ML performance metrics); (2) the bias mitigation methods significantly improve fairness measured by the 4 used metrics in 46% of all the scenarios (ranging between 24%~59% according to different fairness metrics); (3) the bias mitigation methods even lead to decrease in both fairness and ML performance in 25% of the scenarios; (4) the effectiveness of the bias mitigation methods depends on tasks, models, the choice of protected attributes, and the set of metrics used to assess fairness and ML performance; (5) there is no bias mitigation method that can achieve the best trade-off in all the scenarios.

Fairness

Learning point embedding for 3D data processing

no code implementations19 Jul 2021 Zhenpeng Chen, Yuan Li

Among 2D convolutional networks on point clouds, point-based approaches consume point clouds of fixed size directly.

Emojis predict dropouts of remote workers: An empirical study of emoji usage on GitHub

no code implementations10 Feb 2021 Xuan Lu, Wei Ai, Zhenpeng Chen, Yanbin Cao, Qiaozhu Mei

This paper studies how emojis, as non-verbal cues in online communications, can be used for such purposes and how the emotional signals in emoji usage can be used to predict future behavior of workers.

Management

An Empirical Study on Deployment Faults of Deep Learning Based Mobile Applications

1 code implementation13 Jan 2021 Zhenpeng Chen, Huihan Yao, Yiling Lou, Yanbin Cao, Yuanqiang Liu, Haoyu Wang, Xuanzhe Liu

In contrast, faults related to the deployment of DL models on mobile devices (named as deployment faults of mobile DL apps) have not been well studied.

Characterizing Impacts of Heterogeneity in Federated Learning upon Large-Scale Smartphone Data

no code implementations12 Jun 2020 Chengxu Yang, Qipeng Wang, Mengwei Xu, Zhenpeng Chen, Kaigui Bian, Yunxin Liu, Xuanzhe Liu

Based on the data and the platform, we conduct extensive experiments to compare the performance of state-of-the-art FL algorithms under heterogeneity-aware and heterogeneity-unaware settings.

Fairness Federated Learning +1

Understanding Challenges in Deploying Deep Learning Based Software: An Empirical Study

no code implementations2 May 2020 Zhenpeng Chen, Yanbin Cao, Yuanqiang Liu, Haoyu Wang, Tao Xie, Xuanzhe Liu

Deep learning (DL) becomes increasingly pervasive, being used in a wide range of software applications.

Software Engineering

SEntiMoji: An Emoji-Powered Learning Approach for Sentiment Analysis in Software Engineering

1 code implementation4 Jul 2019 Zhenpeng Chen, Yanbin Cao, Xuan Lu, Qiaozhu Mei, Xuanzhe Liu

However, commonly used out-of-the-box sentiment analysis tools cannot obtain reliable results on SE tasks and the misunderstanding of technical jargon is demonstrated to be the main reason.

Representation Learning Sentiment Analysis

A First Look at Emoji Usage on GitHub: An Empirical Study

1 code implementation12 Dec 2018 Xuan Lu, Yanbin Cao, Zhenpeng Chen, Xuanzhe Liu

We find that emojis are used by a considerable proportion of GitHub users.

Computers and Society Software Engineering

Emoji-Powered Representation Learning for Cross-Lingual Sentiment Classification

1 code implementation7 Jun 2018 Zhenpeng Chen, Sheng Shen, Ziniu Hu, Xuan Lu, Qiaozhu Mei, Xuanzhe Liu

To tackle this problem, cross-lingual sentiment classification approaches aim to transfer knowledge learned from one language that has abundant labeled examples (i. e., the source language, usually English) to another language with fewer labels (i. e., the target language).

Classification Cross-Lingual Sentiment Classification +5

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