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Missing data in spatiotemporal systems presents a significant challenge for modern applications, ranging from environmental monitoring to urban traffic management. The integrity of spatiotemporal data often deteriorates due to hardware…

Machine Learning · Computer Science 2025-06-10 Wenying He , Jieling Huang , Junhua Gu , Ji Zhang , Yude Bai

Statistical heterogeneity severely limits the performance of federated learning (FL), motivating several explorations e.g., FedProx, MOON and FedDyn, to alleviate this problem. Despite effectiveness, their considered scenario generally…

Machine Learning · Computer Science 2024-06-04 Ziqing Fan , Jiangchao Yao , Ruipeng Zhang , Lingjuan Lyu , Ya Zhang , Yanfeng Wang

Federated learning (FL) is an important paradigm for training global models from decentralized data in a privacy-preserving way. Existing FL methods usually assume the global model can be trained on any participating client. However, in…

Machine Learning · Computer Science 2022-07-19 Ruixuan Liu , Fangzhao Wu , Chuhan Wu , Yanlin Wang , Lingjuan Lyu , Hong Chen , Xing Xie

As systems are getting more autonomous with the development of artificial intelligence, it is important to discover the causal knowledge from observational sensory inputs. By encoding a series of cause-effect relations between events,…

Machine Learning · Computer Science 2020-01-16 Yuhao Wang , Vlado Menkovski , Hao Wang , Xin Du , Mykola Pechenizkiy

In a standard multi-output classification scenario, both features and labels of training data are partially observed. This challenging issue is widely witnessed due to sensor or database failures, crowd-sourcing and noisy communication…

Machine Learning · Computer Science 2019-12-20 Giancarlo Fissore , Aurélien Decelle , Cyril Furtlehner , Yufei Han

The integration of multimodal data including pathology images and gene profiles is widely applied in precise survival prediction. Despite recent advances in multimodal survival models, collecting complete modalities for multimodal fusion…

Machine Learning · Computer Science 2025-03-25 Yingxue Xu , Fengtao Zhou , Chenyu Zhao , Yihui Wang , Can Yang , Hao Chen

A core task in multi-modal learning is to integrate information from multiple feature spaces (e.g., text and audio), offering modality-invariant essential representations of data. Recent research showed that, classical tools such as {\it…

Machine Learning · Computer Science 2024-10-02 Subash Timilsina , Sagar Shrestha , Xiao Fu

Missing modality issues are common in real-world applications, arising from factors such as equipment failures and privacy concerns. When fine-tuning pre-trained models on downstream datasets with missing modalities, performance can degrade…

Machine Learning · Computer Science 2025-03-04 Zirun Guo , Shulei Wang , Wang Lin , Weicai Yan , Yangyang Wu , Tao Jin

Multimodal models integrating natural language and visual information have substantially improved generalization of representation models. However, their effectiveness significantly declines in real-world situations where certain modalities…

Computer Vision and Pattern Recognition · Computer Science 2025-11-17 Jiajun Chen , Sai Cheng , Yutao Yuan , Yirui Zhang , Haitao Yuan , Peng Peng , Yi Zhong

Federated learning (FL) enables multiple clients to collaboratively train a global model while keeping local data decentralized. Data heterogeneity (non-IID) across clients has imposed significant challenges to FL, which makes local models…

Machine Learning · Computer Science 2025-04-22 Yuting He , Yiqiang Chen , XiaoDong Yang , Hanchao Yu , Yi-Hua Huang , Yang Gu

Multimodal learning often outperforms its unimodal counterparts by exploiting unimodal contributions and cross-modal interactions. However, focusing only on integrating multimodal features into a unified comprehensive representation…

Machine Learning · Computer Science 2025-05-15 Sehwan Moon , Hyunju Lee

In Federated Learning (FL), multiple clients collaboratively train a model without sharing raw data. This paradigm can be further enhanced by Differential Privacy (DP) to protect local data from information inference attacks and is thus…

Machine Learning · Computer Science 2024-12-10 Jianan Chen , Qin Hu , Fangtian Zhong , Yan Zhuang , Minghui Xu

Federated Learning (FL) is a distributed machine learning approach that enables devices to collaboratively train models without sharing their local data, ensuring user privacy and scalability. However, applying FL to real-world data…

Machine Learning · Computer Science 2024-08-14 Jieming Bian , Lei Wang , Jie Xu

Existing multimodal sentiment analysis tasks are highly rely on the assumption that the training and test sets are complete multimodal data, while this assumption can be difficult to hold: the multimodal data are often incomplete in…

Computer Vision and Pattern Recognition · Computer Science 2024-01-26 Xianbing Zhao , Soujanya Poria , Xuejiao Li , Yixin Chen , Buzhou Tang

The imputation of missing values represents a significant obstacle for many real-world data analysis pipelines. Here, we focus on time series data and put forward SSSD, an imputation model that relies on two emerging technologies,…

Machine Learning · Computer Science 2023-05-09 Juan Miguel Lopez Alcaraz , Nils Strodthoff

Cognitive diagnosis model (CDM) is a fundamental and upstream component in intelligent education. It aims to infer students' mastery levels based on historical response logs. However, existing CDMs usually follow the ID-based embedding…

Artificial Intelligence · Computer Science 2024-10-22 Yuanhao Liu , Shuo Liu , Yimeng Liu , Jingwen Yang , Hong Qian

Medical multimodal representation learning aims to integrate heterogeneous data into unified patient representations to support clinical outcome prediction. However, real-world medical datasets commonly contain systematic biases from…

Machine Learning · Computer Science 2026-05-19 Xiaoguang Zhu , Linxiao Gong , Lianlong Sun , Yang Liu , Haoyu Wang , Jing Liu

Federated Learning (FL) enables multiple nodes to collaboratively train a model without sharing raw data. However, FL systems are usually deployed in heterogeneous scenarios, where nodes differ in both data distributions and participation…

Machine Learning · Computer Science 2026-02-13 Hongliang Zhang , Jiguo Yu , Guijuan Wang , Wenshuo Ma , Tianqing He , Baobao Chai , Chunqiang Hu

Federated Learning (FL) enables distributed optimization without compromising data sovereignty. Yet, where local label distributions are mutually exclusive, standard weight aggregation fails due to conflicting optimization trajectories.…

Machine Learning · Computer Science 2026-03-18 Andrea Moleri , Christian Internò , Ali Raza , Markus Olhofer , David Klindt , Fabio Stella , Barbara Hammer

Finding appropriate low dimensional representations of high-dimensional multi-modal data can be challenging, since each modality embodies unique deformations and interferences. In this paper, we address the problem using manifold learning,…

Signal Processing · Electrical Eng. & Systems 2018-08-23 Tal Shnitzer , Mirela Ben-Chen , Leonidas Guibas , Ronen Talmon , Hau-Tieng Wu