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Approximate nearest neighbor (ANN) search in high-dimensional metric spaces is a fundamental problem with many applications. Over the past decade, proximity graph (PG)-based indexes have demonstrated superior empirical performance over…

Data Structures and Algorithms · Computer Science 2026-02-05 Binhong Li , Xiao Yan , Shangqi Lu

Supervised machine learning methods for geological mapping via remote sensing face limitations due to the scarcity of accurately labelled training data that can be addressed by unsupervised learning, such as dimensionality reduction and…

Machine Learning · Computer Science 2024-09-24 Sandeep Nagar , Ehsan Farahbakhsh , Joseph Awange , Rohitash Chandra

We focus on the utilisation of reactive trajectory imitation controllers for goal-directed mobile robot navigation. We propose a topological navigation graph (TNG) - an imitation-learning-based framework for navigating through environments…

Robotics · Computer Science 2021-05-17 Povilas Daniusis , Shubham Juneja , Lukas Valatka , Linas Petkevicius

Diffusion geometry is a manifold learning framework that uses random walks defined by Markov transition matrices to characterize the geometry of a dataset at multiple scales. We use diffusion geometry for neural representations,…

Machine Learning · Computer Science 2026-05-18 Atharva Khandait , Jan E. Gerken

Graph Foundation Models (GFMs) have achieved remarkable success in generalizing across diverse domains. However, they mainly focus on Text-Attributed Graphs (TAGs), leaving Multimodal-Attributed Graphs (MAGs) largely untapped. Developing…

Machine Learning · Computer Science 2026-02-05 Sicheng Liu , Xunkai Li , Daohan Su , Ru Zhang , Hongchao Qin , Ronghua Li , Guoren Wang

Water temperature can vary substantially even across short distances within the same sub-watershed. Accurate prediction of stream water temperature at fine spatial resolutions (i.e., fine scales, $\leq$ 1 km) enables precise interventions…

Machine Learning · Computer Science 2025-05-06 Yingda Fan , Runlong Yu , Janet R. Barclay , Alison P. Appling , Yiming Sun , Yiqun Xie , Xiaowei Jia

Accurate water level forecasting is crucial for managing ecosystems such as the Everglades, a subtropical wetland vital for flood mitigation, drought management, water resource planning, and biodiversity conservation. While recent advances…

Machine Learning · Computer Science 2025-08-08 Rahuul Rangaraj , Jimeng Shi , Rajendra Paudel , Giri Narasimhan , Yanzhao Wu

Accurate fine-grained geospatial scene classification using remote sensing imagery is essential for a wide range of applications. However, existing approaches often rely on manually zooming remote sensing images at different scales to…

Computer Vision and Pattern Recognition · Computer Science 2025-03-17 Yansheng Li , Yuning Wu , Gong Cheng , Chao Tao , Bo Dang , Yu Wang , Jiahao Zhang , Chuge Zhang , Yiting Liu , Xu Tang , Jiayi Ma , Yongjun Zhang

We propose a geometry-driven quantum-inspired classification framework that integrates Correlation Group Structures (CGR), compact SWAP-test-based overlap estimation, and selective variational quantum decision modelling. Rather than…

The underwater environment presents unique challenges, including color distortions, reduced contrast, and blurriness, hindering accurate analysis. In this work, we introduce MuLA-GAN, a novel approach that leverages the synergistic power of…

Computer Vision and Pattern Recognition · Computer Science 2023-12-27 Ahsan Baidar Bakht , Zikai Jia , Muhayy ud Din , Waseem Akram , Lyes Saad Soud , Lakmal Seneviratne , Defu Lin , Shaoming He , Irfan Hussain

Accelerated Cardiovascular Magnetic Resonance (CMR) image reconstruction remains a critical challenge due to the trade-off between scan time and image quality, particularly when generalizing across diverse acquisition settings. We propose…

Image and Video Processing · Electrical Eng. & Systems 2025-10-30 Kian Anvari Hamedani , Narges Razizadeh , Shahabedin Nabavi , Mohsen Ebrahimi Moghaddam

This study explores the use of a digital twin model and deep learning method to build a global terrain and altitude map based on USGS information. The goal is to artistically represent various landforms while incorporating precise elevation…

Image and Video Processing · Electrical Eng. & Systems 2023-05-25 Mohsen Ahmadi , Ahmad Gholizadeh Lonbar , Mohammadsadegh Nouri , Amir Sharifzadeh Javidi , Ali Tarlani Beris , Abbas Sharifi , Ali Salimi-Tarazouj

Reconstructing the structural geology and mineral composition of the first few kilometers of the Earth's subsurface from sparse or indirect surface observations remains a long-standing challenge with critical applications in mineral…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 Simon Ghyselincks , Valeriia Okhmak , Stefano Zampini , George Turkiyyah , David Keyes , Eldad Haber

Multi-source spatial point data prediction is crucial in fields like environmental monitoring and natural resource management, where integrating data from various sensors is the key to achieving a holistic environmental understanding.…

Machine Learning · Computer Science 2024-07-02 Dazhou Yu , Xiaoyun Gong , Yun Li , Meikang Qiu , Liang Zhao

Robust matching of side-scan sonar imagery remains a fundamental challenge in seafloor mapping due to view-dependent backscatter, shadows, and geometric distortion. This paper proposes a novel matching framework that combines physical…

Instrumentation and Detectors · Physics 2025-11-24 Can Lei , Hayat Rajani , Nuno Gracias , Rafael Garcia , Huigang Wang

Long-horizon navigation in unstructured environments demands terrain abstractions that scale to tens of km$^2$ while preserving semantic and geometric structure, a combination existing methods fail to achieve. Grids scale poorly; quadtrees…

We propose a scalable and cost-efficient framework for deploying Graph-based Retrieval-Augmented Generation (GraphRAG) in enterprise environments. While GraphRAG has shown promise for multi- hop reasoning and structured retrieval, its…

Artificial Intelligence · Computer Science 2025-12-19 Congmin Min , Sahil Bansal , Joyce Pan , Abbas Keshavarzi , Rhea Mathew , Amar Viswanathan Kannan

Two important tasks in the field of Topological Data Analysis are building practical multifiltrations on objects and using TDA to detect the geometry. Motivated by the tasks, we build multiparameter filtrations by operators on images named…

Computer Vision and Pattern Recognition · Computer Science 2024-11-28 Jiaxing He , Bingzhe Hou , Tieru Wu , Yue Xin

Hydrogeological flow and transport strongly depend on the connectivity of subsurface properties. Uncertainty concerning the underlying geological setting, due to a lack of field data and prior knowledge, calls for an evaluation of…

Geophysics · Physics 2019-01-30 Guillaume Pirot , Emanuel Huber , James Irving , Niklas Linde

We use TensorNetwork [C. Roberts et al., arXiv: 1905.01330], a recently developed API for performing tensor network contractions using accelerated backends such as TensorFlow, to implement an optimization algorithm for the Multi-scale…

Computational Physics · Physics 2019-07-01 Martin Ganahl , Ashley Milsted , Stefan Leichenauer , Jack Hidary , Guifre Vidal
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