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Learning from class imbalanced datasets poses challenges for many machine learning algorithms. Many real-world domains are, by definition, class imbalanced by virtue of having a majority class that naturally has many more instances than its…

Machine Learning · Computer Science 2021-11-08 Mohammed Temraz , Mark T. Keane

The advancement of Artificial Intelligence (AI) has created opportunities for e-learning, particularly in automated assessment systems that reduce educators' workload and provide timely feedback to students. However, developing effective…

Computers and Society · Computer Science 2025-02-11 Long Zhang , Meng Zhang , Wei Lin Wang , Yu Luo

Multimodal sentiment analysis relies on textual, acoustic, and visual signals, yet real-world data often suffer from modality missing and quality imbalance. Existing methods generate features for modality missing from available ones, but…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Chenglizhao Chen , Yuchen Cao , Xinyu Liu , Mengke Song , Guisheng Zhang , Xiaomin Yu

The proliferation of sophisticated AI-generated deepfakes poses critical challenges for digital media authentication and societal security. While existing detection methods perform well within specific generative domains, they exhibit…

Computer Vision and Pattern Recognition · Computer Science 2025-05-26 Naseem Khan , Tuan Nguyen , Amine Bermak , Issa Khalil

While Multi-modal Language Models (MLMs) demonstrate impressive multimodal ability, they still struggle on providing factual and precise responses for tasks like visual question answering (VQA). In this paper, we address this challenge from…

Artificial Intelligence · Computer Science 2023-12-13 Shitian Zhao , Zhuowan Li , Yadong Lu , Alan Yuille , Yan Wang

Recent advances in generative models have sparked research on improving model fairness with AI-generated data. However, existing methods often face limitations in the diversity and quality of synthetic data, leading to compromised fairness…

Computer Vision and Pattern Recognition · Computer Science 2025-03-10 Zengqun Zhao , Ziquan Liu , Yu Cao , Shaogang Gong , Ioannis Patras

Context-aware processing mechanisms have increasingly become a critical area of exploration for improving the semantic and contextual capabilities of language generation models. The Context-Aware Semantic Recomposition Mechanism (CASRM) was…

Computation and Language · Computer Science 2025-03-27 Richard Katrix , Quentin Carroway , Rowan Hawkesbury , Matthias Heathfield

Recent advancements in multimodal models highlight the value of rewritten captions for improving performance, yet key challenges remain. For example, while synthetic captions often provide superior quality and image-text alignment, it is…

Computer Vision and Pattern Recognition · Computer Science 2024-10-04 Zhengfeng Lai , Vasileios Saveris , Chen Chen , Hong-You Chen , Haotian Zhang , Bowen Zhang , Juan Lao Tebar , Wenze Hu , Zhe Gan , Peter Grasch , Meng Cao , Yinfei Yang

Time series data is essential in various applications, including climate modeling, healthcare monitoring, and financial analytics. Understanding the contextual information associated with real-world time series data is often essential for…

Artificial Intelligence · Computer Science 2025-03-11 Geon Lee , Wenchao Yu , Kijung Shin , Wei Cheng , Haifeng Chen

This paper explores how large language models can leverage multi-level contextual information to predict group coordination patterns in collaborative mixed reality environments. We demonstrate that encoding individual behavioral profiles,…

Human-Computer Interaction · Computer Science 2025-11-19 Diana Romero , Xin Gao , Daniel Khalkhali , Salma Elmalaki

Long-context modeling is one of the critical capabilities of language AI for digesting and reasoning over complex information pieces. In practice, long-context capabilities are typically built into a pre-trained language model~(LM) through…

Computation and Language · Computer Science 2024-10-15 Luyu Gao , Yunyi Zhang , Jamie Callan

Psychological defense mechanisms (PDMs) are unconscious cognitive processes that modulate how individuals perceive and respond to emotional distress. Automatically classifying PDMs from text is clinically valuable but severely hindered by…

Computation and Language · Computer Science 2026-05-15 Hoang-Thuy-Duong Vu , Quoc-Cuong Pham , Huy-Hieu Pham

We present the first systematic study of when target context helps molecular property prediction, evaluating context conditioning across 10 diverse protein families, 4 fusion architectures, data regimes spanning 67-9,409 training compounds,…

Machine Learning · Computer Science 2026-04-09 Bryan Cheng , Jasper Zhang

Real-world categorization is severely hampered by class imbalance because traditional ensembles favor majority classes, which lowers minority performance and overall F1-score. We provide a unique ensemble technique for imbalanced problems…

Computation and Language · Computer Science 2026-04-14 Mohamed Ehab , Ali Hamdi , Khaled Shaban

Retrieval-Augmented Generation (RAG) models frequently produce answers grounded in parametric memory rather than the retrieved context, undermining the core promise of retrieval augmentation. A fundamental obstacle to fixing this…

Computation and Language · Computer Science 2026-04-30 Li Ju , Junzhe Wang , Qi Zhang

Nowadays, data augmentation through synthetic data has been widely used in the field of Grammatical Error Correction (GEC) to alleviate the problem of data scarcity. However, these synthetic data are mainly used in the pre-training phase…

Computation and Language · Computer Science 2024-06-26 Yixuan Wang , Baoxin Wang , Yijun Liu , Qingfu Zhu , Dayong Wu , Wanxiang Che

Prosody is an integral part of communication, but remains an open problem in state-of-the-art speech synthesis. There are two major issues faced when modelling prosody: (1) prosody varies at a slower rate compared with other content in the…

Audio and Speech Processing · Electrical Eng. & Systems 2021-02-15 Zack Hodari , Alexis Moinet , Sri Karlapati , Jaime Lorenzo-Trueba , Thomas Merritt , Arnaud Joly , Ammar Abbas , Penny Karanasou , Thomas Drugman

Multi-task and few-shot time series forecasting tasks are commonly encountered in scenarios such as the launch of new products in different cities. However, traditional time series forecasting methods suffer from insufficient historical…

Machine Learning · Computer Science 2025-06-25 Pengpeng Ouyang , Dong Chen , Tong Yang , Shuo Feng , Zhao Jin , Mingliang Xu

Deep generative models such as GANs have driven impressive advances in conditional image synthesis in recent years. A persistent challenge has been to generate diverse versions of output images from the same input image, due to the problem…

Computer Vision and Pattern Recognition · Computer Science 2021-06-18 Shichong Peng , Alireza Moazeni , Ke Li

Fine-tuning tabular foundation models (TFMs) under data scarcity is challenging, as early stopping on even scarcer validation data often fails to capture true generalization performance. We propose CausalMixFT, a method that enhances…

Machine Learning · Computer Science 2026-01-22 Magnus Bühler , Lennart Purucker , Frank Hutter