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We investigate how fully-passive electromagnetic skins (EMSs) can be engineered to enhance channel charting (CC) in dense urban environments. We employ two complementary state-of-the-art CC techniques, semi-supervised t-distributed…

信号处理 · 电气工程与系统科学 2025-11-04 Mahdi Maleki , Reza Agahzadeh Ayoubi , Marouan Mizmizi , Umberto Spagnolini

Radiotherapists require accurate registration of MR/CT images to effectively use information from both modalities. In a typical registration pipeline, rigid or affine transformations are applied to roughly align the fixed and moving images…

计算机视觉与模式识别 · 计算机科学 2023-07-10 Xiaoyu Bai , Fan Bai , Xiaofei Huo , Jia Ge , Tony C. W. Mok , Zi Li , Minfeng Xu , Jingren Zhou , Le Lu , Dakai Jin , Xianghua Ye , Jingjing Lu , Ke Yan

State-space models are ubiquitous in the statistical literature since they provide a flexible and interpretable framework for analyzing many time series. In most practical applications, the state-space model is specified through a…

统计方法学 · 统计学 2020-06-18 Thi Tuyet Trang Chau , Pierre Ailliot , Valérie Monbet

State Space Models (SSMs) have emerged as powerful architectures in computer vision, yet improving their computational efficiency remains crucial for practical and scalable deployment.While token reduction serves as an effective approach…

计算机视觉与模式识别 · 计算机科学 2025-08-20 Jinyoung Park , Minseok Son , Changick Kim

Reconfigurable distributed antenna and reflecting surface (RDARS) is a promising architecture for future sixth-generation (6G) wireless networks. In particular, the dynamic working mode configuration for the RDARS-aided system brings an…

信号处理 · 电气工程与系统科学 2025-10-17 Chengwang Ji , Kehui Li , Haiquan Lu , Qiaoyan Peng , Jintao Wang , Feifei Gao , Shaodan Ma

Existing deep image watermarking methods follow a fixed embedding-distortion-extraction pipeline, where the embedder and extractor are weakly coupled through a final loss and optimized in isolation. This design lacks explicit collaboration,…

计算机视觉与模式识别 · 计算机科学 2025-12-23 Fei Ge , Ying Huang , Jie Liu , Guixuan Zhang , Zhi Zeng , Shuwu Zhang , Hu Guan

Region-based methods have proven necessary for improving segmentation accuracy of neuronal structures in electron microscopy (EM) images. Most region-based segmentation methods use a scoring function to determine region merging. Such…

计算机视觉与模式识别 · 计算机科学 2018-04-04 Ting Liu , Miaomiao Zhang , Mehran Javanmardi , Nisha Ramesh , Tolga Tasdizen

Expectation maximisation (EM) is an unsupervised learning method for estimating the parameters of a finite mixture distribution. It works by introducing "hidden" or "latent" variables via Baum's auxiliary function $Q$ that allow the joint…

机器学习 · 计算机科学 2022-05-19 Graham W. Pulford

Particle-based shape modeling (PSM) is a popular approach to automatically quantify shape variability in populations of anatomies. The PSM family of methods employs optimization to automatically populate a dense set of corresponding…

计算机视觉与模式识别 · 计算机科学 2024-11-26 Hong Xu , Shireen Y. Elhabian

The stacked intelligent metasurface (SIM) emerges as an innovative technology with the ability to directly manipulate electromagnetic (EM) wave signals, drawing parallels to the operational principles of artificial neural networks (ANN).…

信号处理 · 电气工程与系统科学 2025-09-26 Xiaolei Yang , Jiayi Zhang , Enyu Shi , Ziheng Liu , Jun Liu , Kang Zheng , Bo Ai

High-fidelity electromagnetic (EM) simulations are indispensable for the design of microwave and wave devices, yet repeated full-wave evaluations over high-dimensional design spaces are often computationally prohibitive. While neural…

计算工程、金融与科学 · 计算机科学 2026-03-23 Mingze Sun , Liang Li , Xile Zhao , Zheng Tan , Yulu Hu , Xing Li , Bin Li

Algorithm unrolling methods have proven powerful for solving the regularized least squares problem in computational magnetic resonance imaging (MRI). These approaches unfold an iterative algorithm with a fixed number of iterations,…

图像与视频处理 · 电气工程与系统科学 2025-10-21 Junno Yun , Yaşar Utku Alçalar , Mehmet Akçakaya

We propose convenient inferential methods for potentially nonstationary multivariate unobserved components models with fractional integration and cointegration. Based on finite-order ARMA approximations in the state space representation,…

计量经济学 · 经济学 2020-11-10 Tobias Hartl , Roland Weigand

Metasurface-based radar absorbing structures (RAS) are highly preferred for applications like stealth technology, electromagnetic (EM) shielding, etc. due to their capability to achieve frequency selective absorption characteristics with…

计算机视觉与模式识别 · 计算机科学 2025-05-15 Vineetha Joy , Aditya Anand , Nidhi , Anshuman Kumar , Amit Sethi , Hema Singh

This paper proposes a unified approach for designing stochastic optimization algorithms that robustly scale to the federated learning setting. Our work studies a class of Majorize-Minimization (MM) problems, which possesses a linearly…

机器学习 · 计算机科学 2025-07-24 Aymeric Dieuleveut , Gersende Fort , Mahmoud Hegazy , Hoi-To Wai

Recently, foundation models have been introduced demonstrating various tasks in the field of computer vision. These models such as Segment Anything Model (SAM) are generalized models trained using huge datasets. Currently, ongoing research…

计算机视觉与模式识别 · 计算机科学 2023-06-23 Shurong Chai , Rahul Kumar Jain , Shiyu Teng , Jiaqing Liu , Yinhao Li , Tomoko Tateyama , Yen-wei Chen

Electromagnetically reconfigurable fluid antenna systems (ER-FAS) introduce additional degrees of freedom in the electromagnetic (EM) domain by dynamically steering per-antenna radiation patterns, thereby enhancing power efficiency in…

信号处理 · 电气工程与系统科学 2025-09-01 Alireza Fadakar , Yuchen Zhang , Hui Chen , Musa Furkan Keskin , Henk Wymeersch , Andreas F. Molisch

State-space models (SSMs) have recently attention as an efficient alternative to computationally expensive attention-based models for sequence modeling. They rely on linear recurrences to integrate information over time, enabling fast…

机器学习 · 计算机科学 2026-01-01 Mahdi Karami , Ali Behrouz , Peilin Zhong , Razvan Pascanu , Vahab Mirrokni

Expectation maximisation (EM) is usually thought of as an unsupervised learning method for estimating the parameters of a mixture distribution, however it can also be used for supervised learning when class labels are available. As such, EM…

机器学习 · 计算机科学 2022-06-01 Graham W. Pulford

We propose a new, harmonically enriched multiscale coarse space (HEM) for domain decomposition methods. For a coercive high contrast model problem, we show how to enrich the coarse space so that the method is robust against any variations…

数值分析 · 数学 2015-12-17 Martin J. Gander , Atle Loneland , Talal Rahman