Results 41 to 50 of about 318,704 (275)

A GtoG Direct Coding Mapping Method for Multi-Type Global Discrete Grids Based on Space Filling Curves

ISPRS International Journal of Geo-Information, 2022
DGGS (Discrete Global Grid System) has many subdivision models and coding methods. Due to the lack of underlying consistency of different DGGS codes, most of them are converted through longitude–latitude, which greatly reduces the interoperability ...
Yalu Li, Xuesheng Zhao, Wenbin Sun, Guangsong Wang, Fuli Luo, Zheng Wang, Yuanzheng Duan   +6 more
doaj   +1 more source

An Efficient Policy Iteration Algorithm for Dynamic Programming Equations [PDF]

, 2013
We present an accelerated algorithm for the solution of static Hamilton-Jacobi-Bellman equations related to optimal control problems. Our scheme is based on a classic policy iteration procedure, which is known to have superlinear convergence in many ...
Alla, Alessandro, Falcone, Maurizio, Kalise, Dante   +2 more
core   +3 more sources

Efficient Distortion Mitigation and Partition Reduction in Mapping Global Geodata: Dual Orthogonal Equidistant Cylindrical Projection Approach

ISPRS International Journal of Geo-Information, 2023
The rapid growth in Earth’s global geospatial data necessitates an efficient system for organizing the data, facilitating data fusion from diverse sources, and promoting interoperability.
Aleksandar Dimitrijević, Aleksandar Milosavljević, Dejan Rančić   +2 more
doaj   +1 more source

Segmentation and Restoration of Images on Surfaces by Parametric Active Contours with Topology Changes

, 2015
In this article, a new method for segmentation and restoration of images on two-dimensional surfaces is given. Active contour models for image segmentation are extended to images on surfaces.
Benninghoff, Heike, Garcke, Harald
core   +1 more source

W-Hilbert: A W-shaped Hilbert curve and coding method for multiscale geospatial data index

International Journal of Applied Earth Observations and Geoinformation, 2023
Space-filling curves (SFCs) are commonly used in discrete global grid systems (DGGSs) and applied to efficient indices and queries of massive geospatial data.
Yi Lei, Xiaochong Tong, Dali Wang, Chunping Qiu, He Li, Youwei Zhang   +5 more
doaj   +1 more source

The Construction of a Partially Regular Solution to the Landau-Lifshitz-Gilbert Equation in $\mathbb{R}^2$

, 2004
We establish a framework to construct a global solution in the space of finite energy to a general form of the Landau-Lifshitz-Gilbert equation in $\mathbb{R}^2$.
Blaine Lawson H, Hélein F, Joy Ko, Ladyzhenskaya O A, Melcher C, Struwe M, Wu X   +6 more
core   +1 more source

Polynomial mechanics and optimal control

, 2015
We describe a new algorithm for trajectory optimization of mechanical systems. Our method combines pseudo-spectral methods for function approximation with variational discretization schemes that exactly preserve conserved mechanical quantities such as ...
Srinivasan, Akshay, Venkadesan, Madhusudhan   +1 more
core   +1 more source

Harnessing Fungal Biowelding for Constructing Mycelium‐Engineered Materials

Advanced Engineering Materials, EarlyView.
Mycelium‐bound composites (MBCs) offer low‐carbon alternatives for construction, yet interfacial bonding remains a critical challenge. This review examines fungal biowelding as a biocompatible adhesive, elucidating mycelium‐mediated interfacial mechanisms and their role in material assembly. Strategies to optimize biowelding are discussed, highlighting
Xue Brenda Bai, Xinrui Sarah Niu, Zhao Qin   +2 more
wiley   +1 more source

Numerical evolution of axisymmetric, isolated systems in General Relativity [PDF]

, 2002
We describe in this article a new code for evolving axisymmetric isolated systems in general relativity. Such systems are described by asymptotically flat space-times which have the property that they admit a conformal extension.
A. Ashtekar, B. Gustafsson, H. Friedrich, H. Friedrich, H. Friedrich, J. Bičák, J. Bičák, J. Carot, J. Frauendiener, J. Frauendiener, J. Frauendiener, J. Frauendiener, J. Wilson, J. Winicour, Jörg Frauendiener, M. Alcubierre, Matthias Hein, P. Hübner, P. Hübner, S.A. Teukolsky   +19 more
core   +2 more sources

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source