Search Results for author: Nan Liu

Found 42 papers, 17 papers with code

Fairness-Aware Interpretable Modeling (FAIM) for Trustworthy Machine Learning in Healthcare

no code implementations8 Mar 2024 Mingxuan Liu, Yilin Ning, Yuhe Ke, Yuqing Shang, Bibhas Chakraborty, Marcus Eng Hock Ong, Roger Vaughan, Nan Liu

The escalating integration of machine learning in high-stakes fields such as healthcare raises substantial concerns about model fairness.

Fairness

Some Finite-Sample Results on the Hausman Test

no code implementations16 Dec 2023 Jinyong Hahn, Zhipeng Liao, Nan Liu, Shuyang Sheng

This paper shows that the endogeneity test using the control function approach in linear instrumental variable models is a variant of the Hausman test.

Leveraging Anatomical Constraints with Uncertainty for Pneumothorax Segmentation

no code implementations26 Nov 2023 Han Yuan, Chuan Hong, Nguyen Tuan Anh Tran, Xinxing Xu, Nan Liu

We propose a novel approach that incorporates the lung+ space as a constraint during DL model training for pneumothorax segmentation on 2D chest radiographs.

Lesion Segmentation Segmentation

Generative Artificial Intelligence in Healthcare: Ethical Considerations and Assessment Checklist

2 code implementations2 Nov 2023 Yilin Ning, Salinelat Teixayavong, Yuqing Shang, Julian Savulescu, Vaishaanth Nagaraj, Di Miao, Mayli Mertens, Daniel Shu Wei Ting, Jasmine Chiat Ling Ong, Mingxuan Liu, Jiuwen Cao, Michael Dunn, Roger Vaughan, Marcus Eng Hock Ong, Joseph Jao-Yiu Sung, Eric J Topol, Nan Liu

The widespread use of ChatGPT and other emerging technology powered by generative artificial intelligence (GenAI) has drawn much attention to potential ethical issues, especially in high-stakes applications such as healthcare, but ethical discussions are yet to translate into operationalisable solutions.

Ethics

Transmission line condition prediction based on semi-supervised learning

no code implementations30 Oct 2023 Sizhe Li, Xun Ma, Nan Liu, Yi Jin

Transmission line state assessment and prediction are of great significance for the rational formulation of operation and maintenance strategy and improvement of operation and maintenance level.

Representation Learning

Unsupervised Compositional Concepts Discovery with Text-to-Image Generative Models

no code implementations ICCV 2023 Nan Liu, Yilun Du, Shuang Li, Joshua B. Tenenbaum, Antonio Torralba

Text-to-image generative models have enabled high-resolution image synthesis across different domains, but require users to specify the content they wish to generate.

Image Generation

Towards clinical AI fairness: A translational perspective

no code implementations26 Apr 2023 Mingxuan Liu, Yilin Ning, Salinelat Teixayavong, Mayli Mertens, Jie Xu, Daniel Shu Wei Ting, Lionel Tim-Ee Cheng, Jasmine Chiat Ling Ong, Zhen Ling Teo, Ting Fang Tan, Ravi Chandran Narrendar, Fei Wang, Leo Anthony Celi, Marcus Eng Hock Ong, Nan Liu

In this paper, we discuss the misalignment between technical and clinical perspectives of AI fairness, highlight the barriers to AI fairness' translation to healthcare, advocate multidisciplinary collaboration to bridge the knowledge gap, and provide possible solutions to address the clinical concerns pertaining to AI fairness.

Fairness Translation

A roadmap to fair and trustworthy prediction model validation in healthcare

no code implementations7 Apr 2023 Yilin Ning, Victor Volovici, Marcus Eng Hock Ong, Benjamin Alan Goldstein, Nan Liu

A prediction model is most useful if it generalizes beyond the development data with external validations, but to what extent should it generalize remains unclear.

FedScore: A privacy-preserving framework for federated scoring system development

1 code implementation1 Mar 2023 Siqi Li, Yilin Ning, Marcus Eng Hock Ong, Bibhas Chakraborty, Chuan Hong, Feng Xie, Han Yuan, Mingxuan Liu, Daniel M. Buckland, Yong Chen, Nan Liu

We also calculated the average AUC values and SDs for each local model, and the FedScore model showed promising accuracy and stability with a high average AUC value which was closest to the one of the pooled model and SD which was lower than that of most local models.

Federated Learning Model Selection +2

Shapley variable importance cloud for machine learning models

no code implementations16 Dec 2022 Yilin Ning, Mingxuan Liu, Nan Liu

Current practice in interpretable machine learning often focuses on explaining the final model trained from data, e. g., by using the Shapley additive explanations (SHAP) method.

Interpretable Machine Learning regression

An ensemble neural network approach to forecast Dengue outbreak based on climatic condition

1 code implementation16 Dec 2022 Madhurima Panja, Tanujit Chakraborty, Sk Shahid Nadim, Indrajit Ghosh, Uttam Kumar, Nan Liu

In comparison with statistical, machine learning, and deep learning methods, our proposed XEWNet performs better in 75% of the cases for short-term and long-term forecasting of dengue incidence.

Time Series Analysis

A Framework for Mutual Information-based MIMO Integrated Sensing and Communication Beamforming Design

no code implementations15 Nov 2022 Jin Li, Gui Zhou, Tantao Gong, Nan Liu

For the case of a single communication user, we consider three types of echo interference, no interference, a point interference, and an extended interference.

Integrated Sensing and Communication Beamforming Design Based on Mutual Information

no code implementations8 Nov 2022 Jin Li, Nan Liu

A closed-form solution with low complexity and a solution based on the semidefinite relaxation (SDR) method are provided to solve these two problems, respectively.

Epicasting: An Ensemble Wavelet Neural Network (EWNet) for Forecasting Epidemics

1 code implementation21 Jun 2022 Madhurima Panja, Tanujit Chakraborty, Uttam Kumar, Nan Liu

Unfortunately, most of these past epidemics exhibit nonlinear and non-stationary characteristics due to their spreading fluctuations based on seasonal-dependent variability and the nature of these epidemics.

Scheduling Time Series +1

Balanced background and explanation data are needed in explaining deep learning models with SHAP: An empirical study on clinical decision making

1 code implementation8 Jun 2022 Mingxuan Liu, Yilin Ning, Han Yuan, Marcus Eng Hock Ong, Nan Liu

This study sought to investigate the effects of data imbalance on SHAP explanations for deep learning models, and to propose a strategy to mitigate these effects.

Decision Making

Towards Practical Differential Privacy in Data Analysis: Understanding the Effect of Epsilon on Utility in Private ERM

no code implementations6 Jun 2022 Yuzhe Li, Yong liu, Bo Li, Weiping Wang, Nan Liu

In this paper, we focus our attention on private Empirical Risk Minimization (ERM), which is one of the most commonly used data analysis method.

Compositional Visual Generation with Composable Diffusion Models

1 code implementation3 Jun 2022 Nan Liu, Shuang Li, Yilun Du, Antonio Torralba, Joshua B. Tenenbaum

Large text-guided diffusion models, such as DALLE-2, are able to generate stunning photorealistic images given natural language descriptions.

Sentence

Benchmarking emergency department triage prediction models with machine learning and large public electronic health records

1 code implementation22 Nov 2021 Feng Xie, Jun Zhou, Jin Wee Lee, Mingrui Tan, Siqi Li, Logasan S/O Rajnthern, Marcel Lucas Chee, Bibhas Chakraborty, An-Kwok Ian Wong, Alon Dagan, Marcus Eng Hock Ong, Fei Gao, Nan Liu

In this paper, based on the Medical Information Mart for Intensive Care IV Emergency Department (MIMIC-IV-ED) database, we developed a publicly available benchmark suite for ED triage predictive models and created a benchmark dataset that contains over 400, 000 ED visits from 2011 to 2019.

Benchmarking

Learning to Compose Visual Relations

no code implementations NeurIPS 2021 Nan Liu, Shuang Li, Yilun Du, Joshua B. Tenenbaum, Antonio Torralba

The visual world around us can be described as a structured set of objects and their associated relations.

AutoScore-Imbalance: An interpretable machine learning tool for development of clinical scores with rare events data

1 code implementation13 Jul 2021 Han Yuan, Feng Xie, Marcus Eng Hock Ong, Yilin Ning, Marcel Lucas Chee, Seyed Ehsan Saffari, Hairil Rizal Abdullah, Benjamin Alan Goldstein, Bibhas Chakraborty, Nan Liu

All scoring models were evaluated on the basis of their area under the curve (AUC) in the receiver operating characteristic analysis and balanced accuracy (i. e., mean value of sensitivity and specificity).

Decision Making Interpretable Machine Learning +1

AutoScore-Survival: Developing interpretable machine learning-based time-to-event scores with right-censored survival data

1 code implementation13 Jun 2021 Feng Xie, Yilin Ning, Han Yuan, Benjamin Alan Goldstein, Marcus Eng Hock Ong, Nan Liu, Bibhas Chakraborty

We illustrated our method in a real-life study of 90-day mortality of patients in intensive care units and compared its performance with survival models (i. e., Cox) and the random survival forest.

BIG-bench Machine Learning Interpretable Machine Learning +1

FIBER: Fill-in-the-Blanks as a Challenging Video Understanding Evaluation Framework

1 code implementation ACL 2022 Santiago Castro, Ruoyao Wang, Pingxuan Huang, Ian Stewart, Oana Ignat, Nan Liu, Jonathan C. Stroud, Rada Mihalcea

We propose fill-in-the-blanks as a video understanding evaluation framework and introduce FIBER -- a novel dataset consisting of 28, 000 videos and descriptions in support of this evaluation framework.

Language Modelling Multiple-choice +4

A_Blockchain-Based_Decentralized_Federated_Learning_Framework_with_Committee_Consensus

no code implementations IEEE Network 2021 Yuzheng Li, Chuan Chen, Nan Liu, Huawei Huang, Zibin Zheng, and Qiang Yan

To address these security issues, we propose a decentralized federated learning framework based on blockchain, that is, a Blockchain- based Federated Learning framework with Committee consensus (BFLC).

Federated Learning

Fast Estimation for Privacy and Utility in Differentially Private Machine Learning

no code implementations1 Jan 2021 Yuzhe Li, Yong liu, Weipinng Wang, Bo Li, Nan Liu

In this paper, we deduce the influence of $\epsilon$ on utility private learning models through strict mathematical derivation, and propose a novel approximate approach for estimating the utility of any $\epsilon$ value.

BIG-bench Machine Learning

A Blockchain-based Decentralized Federated Learning Framework with Committee Consensus

1 code implementation2 Apr 2020 Yuzheng Li, Chuan Chen, Nan Liu, Huawei Huang, Zibin Zheng, Qiang Yan

To address these security issues, we proposed a decentralized federated learning framework based on blockchain, i. e., a Blockchain-based Federated Learning framework with Committee consensus (BFLC).

Federated Learning

FASPell: A Fast, Adaptable, Simple, Powerful Chinese Spell Checker Based On DAE-Decoder Paradigm

1 code implementation WS 2019 Yuzhong Hong, Xianguo Yu, Neng He, Nan Liu, Junhui Liu

We propose a Chinese spell checker {--} FASPell based on a new paradigm which consists of a denoising autoencoder (DAE) and a decoder.

Chinese Spell Checking Denoising +1

Time-sync Video Tag Extraction Using Semantic Association Graph

no code implementations3 May 2019 Wenmian Yang, Kun Wang, Na Ruan, Wenyuan Gao, Weijia Jia, Wei Zhao, Nan Liu, Yunyong Zhang

Finally, we gain the weight of each word by combining Semantic Weight (SW) and Inverse Document Frequency (IDF).

TAG

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