Results 21 to 30 of about 239 (123)

Ri-sets, pseudo-contractibility and weak contractibility on hyperspaces of continua

open access: yes, 2018
In this paper we discuss the notions of pseudo-contractibility and weak contractibility on hyperspaces of (Hausdorff) continua. Also we prove that if a continuum X contains an Ri-set then it is not pseudo-contractible.
Capulín, Félix   +5 more
core   +1 more source

Induced mappings between quotient spaces of n-fold hyperspaces of continua

open access: yes, 2016
For a continuum X the hyperspace of nonempty closed subsets of X with at most n components is called the n-fold hyperspace Cn(X) and if m < n then Cm(X) ⊂ Cn(X) so it is possible to form a quotient space Cn(X)/Cm(X) identifying the set Cm(X) to a point ...
Capulín, Félix   +7 more
core   +1 more source

A Sensitivity Analysis Workflow for Power Series Compounded Lifetime Models: Evidence From Weibull Power Series Fits

open access: yesQuality and Reliability Engineering International, EarlyView.
ABSTRACT We propose a practical procedure to quantify the time varying influence of parameters on hazard functions for power series compounded lifetime models. The procedure combines likelihood based fitting with a two stage sensitivity analysis and applies to a range of baselines and compounding laws.
Yuancheng Si, Saralees Nadarajah
wiley   +1 more source

Hyperspaces of Continua [PDF]

open access: yes, 1990
Several properties of Hausdorff continua are considered in this paper. However, the major emphasis is on developing the properties of the hyperspaces 2x and C(X) of a Hausdorff continuum X. Preliminary definitions and notation are introduced in Chapter I.
Simmons, Charlotte
core  

More on T-closed sets

open access: yesApplied General Topology
We consider properties of the diagonal of a continuum that are used later in the paper. We continue the study of T-closed subsets of a continuum X. We prove that for a continuum X, the statements: ΔX  is a nonblock subcontinuum of X2, ΔX is a shore ...
Javier Camargo, Sergio Macías
doaj   +1 more source

Towards practical oscillation detection in wind farms: Comparative study of AI models, novel metrics, and edge implementations

open access: yesEnergy Conversion and Economics, EarlyView.
Abstract Fast oscillations observed in wind farms and other renewable energy systems interfaced with power grids must be addressed promptly to prevent devastating shutdown and damage. Existing approaches mainly target high‐magnitude oscillations using data‐intensive convolutional neural networks (CNNs), leading to delayed detection and overlooking mild
Shyam Yathirajam   +8 more
wiley   +1 more source

Arc-smoothness in hyperspaces

open access: yes, 1983
Let X be a metric continuum and 2x (C(X)) denote the hyperspace of closed subsets (subcontinua) of X. The concept of arc-smoothness, which is a special type of contractibility, is investigated in 2x and C(X).
Goodykoontz, Jack T.
core   +1 more source

The Validity of ICD‐10 Codes in Recording the Incidence of Traumatic Dental Injuries

open access: yesDental Traumatology, EarlyView.
ABSTRACT Background/Aim Traumatic dental injuries (TDIs) significantly affect quality of life and healthcare costs. Large administrative datasets using ICD codes offer opportunities for epidemiological research; however, the accuracy of International Classification of Diseases, Tenth Revision (ICD‐10) codes for TDIs remains unclear. This study aimed to
Ehsan N. Azadani   +3 more
wiley   +1 more source

Beyond 5G and Non‐terrestrial Network (NTN) Integrated Architecture: Access Challenges for Expanding Artificial Intelligence of Things (AIoT)

open access: yesInternational Journal of Satellite Communications and Networking, Volume 44, Issue 4, Page 378-393, July/August 2026.
ABSTRACT This study analyzes the architecture of the beyond 5G‐NTN (Non‐terrestrial Network) integrated network and presents the technical, legal, and regulatory challenges and considerations for expanding the Artificial Intelligence of Things (AIoT) ecosystem.
Byung Woon Kim, Ga Eun Choi
wiley   +1 more source

Uniqueness of hyperspaces for Peano continua

open access: yesRocky Mountain Journal of Mathematics, 2013
For a continuum (i.e., a nondegenerate compact connected metric space) \(X\) and a positive integer \(n\), let \(C_n (X)\) denote the space of all nonempty closed subsets of \(X\) with at most \(n\) components, whose topology is endowed with the Hausdorff metric. A continuum \(X\) is said to have unique hyperspace \(C_n(X)\) provided that the following
Hernández-Gutiérrez, Rodrigo   +2 more
openaire   +3 more sources

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