Results 111 to 120 of about 903 (207)

Transfer operators on graphs: spectral clustering and beyond

open access: yesJournal of Physics: Complexity
Graphs and networks play an important role in modeling and analyzing complex interconnected systems such as transportation networks, integrated circuits, power grids, citation graphs, and biological and artificial neural networks.
Stefan Klus, Maia Trower
doaj   +1 more source

Koopman Operator Methods in Structural Health Monitoring: A Systematic Review Towards Hybrid Physics–Data Frameworks

open access: yesApplied Sciences
Structural health monitoring (SHM) is essential for the safety and long-term performance of civil and mechanical infrastructure, yet traditional vibration-based approaches often struggle with nonlinear behavior and environmental variability.
Abiodun Victor Alagbada, Tom Lahmer
doaj   +1 more source

The 2‐D Orthogonal Packing Problem With Multiple Levels of Prioritization: A Spatial Optimization Perspective

open access: yesNaval Research Logistics (NRL), Volume 73, Issue 8, Page 1279-1300, December 2026.
ABSTRACT This paper addresses two‐dimensional orthogonal packing within a confined space, integrating bin packing principles with facility layout concepts to address scenarios in which items must not only fit but also be arranged according to spatial priorities.
William K. Kirschenman   +4 more
wiley   +1 more source

Partial Observation of Linear Systems With the Mori–Zwanzig Formalism

open access: yesProceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.
ABSTRACT The Mori–Zwanzig (MZ) formalism provides a systematic framework for deriving reduced‐order model of dynamical systems when only part of the state is observed, but its practical use is often limited by the complexity of the resulting computations.
Fan Wang, Peter Benner, Jan Heiland
wiley   +1 more source

Deep Embedding Koopman Neural Operator-Based Nonlinear Flight Training Trajectory Prediction Approach

open access: yesMathematics
Accurate flight training trajectory prediction is a key task in automatic flight maneuver evaluation and flight operations quality assurance (FOQA), which is crucial for pilot training and aviation safety management. The task is extremely challenging due
Jing Lu, Jingjun Jiang, Yidan Bai
doaj   +1 more source

Exact Principal Koopman Eigenfunctions of a Pendulum

open access: yesProceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.
ABSTRACT The Koopman operator framework offers a rigorous approach to representing nonlinear dynamical systems through linear (or bilinear) differential equations. For deterministic, dissipative systems, it guarantees the existence of global coordinate transformations that linearize autonomous systems and bilinearize input‐affine systems. Despite these
Ulrich Römer
wiley   +1 more source

Predicting the unseen: improving robustness in koopman surrogate models for crowd dynamics at a bottleneck

open access: yesActa Polytechnica CTU Proceedings
Crowds moving through bottlenecks form a dynamical system, with its density fluctuating in time and space. The system dynamics can be learned and predicted using the Koopman operator framework.
Sabrina Kern, Gerta Köster
doaj   +1 more source

The Climate Impasse: Disavowal, Exhaustion and Everyday Life in the Climate Crisis

open access: yesTransactions of the Institute of British Geographers, Volume 51, Issue 4, December 2026.
ABSTRACT The consequences of climate‐related disasters and emergencies are becoming increasingly stark. And yet in many places, consensus on climate action appears unattainable. I call this problem the climate impasse. In this paper, I draw on emerging theory on affect and negativity to characterise this impasse in three ways.
Nathaniel O'Grady
wiley   +1 more source

Learning Hamiltonian neural Koopman operator and simultaneously sustaining and discovering conservation laws

open access: yesPhysical Review Research
Accurately finding and predicting dynamics based on the observational data with noise perturbations is of paramount significance but still a major challenge presently.
Jingdong Zhang, Qunxi Zhu, Wei Lin
doaj   +1 more source

Feedback Linearisation with State Constraints

open access: yesInternational Journal of Robust and Nonlinear Control, Volume 36, Issue 17, Page 7579-7595, 25 November 2026.
ABSTRACT Feedback Linearisation (FBL) is a widely used technique that applies feedback laws to transform input‐affine nonlinear control systems into linear control systems, allowing for the use of linear controller design methods such as pole placement.
Songlin Jin, Yuanbo Nie, Morgan Jones
wiley   +1 more source

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