Results 11 to 20 of about 444,519 (336)

Partitioning bases of topological spaces [PDF]

open access: yesElectronic Notes in Discrete Mathematics, 2013
We investigate whether an arbitrary base for a dense-in-itself topological space can be partitioned into two bases. We prove that every base for a T_3 Lindel f topology can be partitioned into two bases while there exists a consistent example of a first countable, 0-dimensional, Hausdorff space of size continuum and weight _1 which admits a point ...
Soukup, Dániel Tamás, Soukup, Lajos
openaire   +4 more sources

Omnidirectional Vision Based Topological Navigation [PDF]

open access: yesInternational Journal of Computer Vision, 2007
In this work we present a novel system for autonomous mobile robot navigation. With only an omnidirectional camera as sensor, this system is able to build automatically and robustly accurate topologically organised environment maps of a complex, natural environment.
Goedemé, Toon   +3 more
openaire   +3 more sources

Topological Design of a Mortar Base Plate under Impact Loads

open access: yesShock and Vibration, 2021
In this work, the topology optimization of a mortar base plate is analysed under impact loading conditions. Usually, in this case, only ordinary topology optimization under volume constraints is considered.
Fengfeng Wang, Guolai Yang
doaj   +1 more source

Hybrid topologies on the real line

open access: yesApplied General Topology, 2023
Given A ⊆ ℝ , the Hattori space H(A) is the topological space ( ℝ , τA  ) where each a ∈ A has a τA -neighborhood base { ( a − ε , a + ε ) : ε > 0 } and each b ∈ ℝ − A has a τA -neighborhood base { [ b , b + ε ) : ε > 0 } .
Tom Richmond
doaj   +1 more source

Topological-insulator-based terahertz modulator [PDF]

open access: yesScientific Reports, 2017
AbstractThree dimensional topological insulators, as a new phase of quantum matters, are characterized by an insulating gap in the bulk and a metallic state on the surface. Particularly, most of the topological insulators have narrow band gaps, and hence have promising applications in the area of terahertz optoelectronics.
X. B. Wang   +7 more
openaire   +3 more sources

Separation functions and mild topologies

open access: yesAnalysis and Geometry in Metric Spaces, 2023
Given MM and NN Hausdorff topological spaces, we study topologies on the space C0(M;N){C}^{0}\left(M;\hspace{0.33em}N) of continuous maps f:M→Nf:M\to N. We review two classical topologies, the “strong” and the “weak” topology. We propose a definition of “
Mennucci Andrea C. G.
doaj   +1 more source

VGAE-AMF: A Novel Topology Reconstruction Algorithm for Invulnerability of Ocean Wireless Sensor Networks Based on Graph Neural Network

open access: yesJournal of Marine Science and Engineering, 2023
Ocean wireless sensor networks (OWSNs) play an important role in marine environment monitoring, underwater target tracking, and marine defense. OWSNs not only monitor the surface information in real time but also act as an important relay layer for ...
Ying Zhang   +3 more
doaj   +1 more source

A universal approach to coverage probability and throughput analysis for cellular networks [PDF]

open access: yes, 2015
This paper proposes a novel tractable approach for accurately analyzing both the coverage probability and the achievable throughput of cellular networks.
Chen, Sheng   +4 more
core   +1 more source

Topology-based signal separation

open access: yesChaos: An Interdisciplinary Journal of Nonlinear Science, 2004
Traditional noise-filtering techniques are known to significantly alter features of chaotic data. In this paper, we present a noncausal topology-based filtering method for continuous-time dynamical systems that is effective in removing additive, uncorrelated noise from time-series data.
Robins, Vanessa   +2 more
openaire   +3 more sources

Design of a Broadband Amplifier for High Speed Applications [PDF]

open access: yes, 2002
This paper provides comprehensive insight into the design approach followed for an amplifier dedicated to high speed base band signals. To demonstrate the methodology, an amplifier consisting of nine PHEMT cascode cells within a distributed amplifier ...
Camargo, E.   +4 more
core   +1 more source

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