Results 21 to 30 of about 22,626 (299)

JIGSAW-GEO (1.0): locally orthogonal staggered unstructured grid generation for general circulation modelling on the sphere [PDF]

open access: yesGeoscientific Model Development, 2017
An algorithm for the generation of non-uniform, locally orthogonal staggered unstructured spheroidal grids is described. This technique is designed to generate very high-quality staggered Voronoi–Delaunay meshes appropriate for general circulation ...
D. Engwirda, D. Engwirda
doaj   +1 more source

HOSVD-Based Algorithm for Weighted Tensor Completion

open access: yesJournal of Imaging, 2021
Matrix completion, the problem of completing missing entries in a data matrix with low-dimensional structure (such as rank), has seen many fruitful approaches and analyses.
Zehan Chao   +2 more
doaj   +1 more source

Closed Sets and Operators thereon: Representations, Computability and Complexity [PDF]

open access: yesLogical Methods in Computer Science, 2018
The TTE approach to Computable Analysis is the study of so-called representations (encodings for continuous objects such as reals, functions, and sets) with respect to the notions of computability they induce.
Carsten Rösnick-Neugebauer
doaj   +1 more source

Saturated Visual-Servoing Control Strategy for Nonholonomic Mobile Robots With Experimental Evaluations

open access: yesIEEE Access, 2021
A novel saturated visual control strategy for nonholonomic mobile robots is presented. The principal focus is to deal with the stabilization problem. The saturation bounds for the control actions avoid exceeding the physical restrictions of the actuators.
Ricardo Perez-Alcocer   +3 more
doaj   +1 more source

Uniform reconstruction of continuous functions with the RAFU method

open access: yesApplied General Topology, 2017
The RAFU (radical functions) method can be used to obtain the uniformreconstruction of a continuous function from its values at some ofthe points of partitions of a closed interval.
Eduardo Corbacho Cortés
doaj   +1 more source

-openness of non-uniform hyperbolic diffeomorphisms with bounded -norm [PDF]

open access: yesErgodic Theory and Dynamical Systems, 2019
We study the $C^{1}$-topological properties of the subset of non-uniform hyperbolic diffeomorphisms in a certain class of $C^{2}$ partially hyperbolic symplectic systems which have bounded $C^{2}$ distance to the identity. In this set, we prove the stability of non-uniform hyperbolicity as a function of the diffeomorphism and the measure, and the ...
CHAO LIANG, KARINA MARIN, JIAGANG YANG
openaire   +1 more source

Permanence for a class of non-autonomous delay differential systems

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2018
We are concerned with a class of $n$-dimensional non-autonomous delay differential equations obtained by adding a non-monotone delayed perturbation to a linear homogeneous cooperative system of delay differential equations.
Teresa Faria
doaj   +1 more source

Rate‐compatible systematic polar codes

open access: yesIET Communications, 2021
Puncturing and shortening are two common ways to achieve rate‐compatible non‐systematic polar codes (NSPCs). Systematic polar codes (SPCs) have been shown to outperform NSPCs with the same encoding and decoding complexity.
Hongfei Zhu   +3 more
doaj   +1 more source

Non-uniformity issues and workarounds in bounded-size sampling

open access: yesThe VLDB Journal, 2013
A variety of schemes have been proposed in the literature to speed up query processing and analytics by incrementally maintaining a bounded-size uniform sample from a dataset in the presence of a sequence of insertion, deletion, and update transactions.
Gemulla, Rainer   +2 more
openaire   +3 more sources

Deterministic and stochastic primal-dual subgradient algorithms for uniformly convex minimization

open access: yesStochastic Systems, 2014
We discuss non-Euclidean deterministic and stochastic algorithms for optimization problems with strongly and uniformly convex objectives. We provide accuracy bounds for the performance of these algorithms and design methods which are adaptive with ...
Anatoli Juditsky, Yuri Nesterov
doaj   +1 more source

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