Results 121 to 130 of about 14,077 (306)
NANUQ: a method for inferring species networks from gene trees under the coalescent model
Algorithms for Molecular Biology, 2019 Species networks generalize the notion of species trees to allow for hybridization or other lateral gene transfer. Under the network multispecies coalescent model, individual gene trees arising from a network can have any topology, but arise with ...
Elizabeth S. Allman +2 more
doaj +1 more source
Topologic proofs of some combinatorial theorems
Journal of Combinatorial Theory, Series A, 1974 AbstractDuring the last 50 years several combinatorial theorems have been proved which have provided elegant proofs of a number of fundamental results in topology. These include Sperner's Lemma, Tucker's Lemma, and Kuhn's Cubical Sperner Lemma, which have been applied to the Brouwer Fixed Point Theorem, as well as a number of results involving ...
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Twin Crystal Moiré Metasurfaces for Crossing Flat‐Band Transport
Advanced Functional Materials, EarlyView.This study introduces twin crystal moiré metasurfaces, breaking in‐plane symmetry to enable reconfigurable acoustic wave manipulation. By adjusting the twin angle and interlayer twist angle, various combinations of hyperbolic, flat bands, and elliptic states can be synthesized in the system.
Shida Fan +9 more
wiley +1 more source
Topology and combinatorial structures of arrangements of hyperplanes.
, 1993 Topology and combinatorial structures of arrangements of ...
Tan. Jiang (7996340)
core
Low‐Profile, High‐Gain GRIN RF Lenses via Multi‐Material Vat Photopolymerization
Advanced Functional Materials, EarlyView.We investigate the opportunity of leveraging multi‐material vat photopolymerization printing to manufacture intricate lenses exhibiting permittivity gradients that can increase signal gain in transmitted radiofrequency signals in the X‐ and Ku‐bands. Lenses produced with more distinct low‐loss materials (up to 5) can deliver an 18 dB signal gain with a
Lawrence Romangsuriat +3 more
wiley +1 more source
International Journal of Electrical Power & Energy SystemsAggregated flexible loads offer a promising solution for secondary frequency regulation (SFR) in power systems with increasing intermittent renewable energy sources.
Mengtong Chen +5 more
doaj +1 more source
Review of Thermally Activated Twisted Coiled Polymer Actuators: A Materials Science Perspective
Advanced Functional Materials, EarlyView.Thermally activated twisted and coiled polymer actuators (TCPAs) combine lightweight design, large deformation, and scalable fabrication for soft robotic and wearable applications. This review connects polymer structure, processing history, helix geometry, and thermomechanical characterization to actuator performance, highlighting current challenges in
Nadja Schenk +3 more
wiley +1 more source
AlgorithmsThe gas-gathering pipeline network is a critical infrastructure for collecting and conveying natural gas from the extraction site to the processing facility. This paper introduces a design optimization model for a star–tree gas-gathering pipeline network
Yu Lin +6 more
doaj +1 more source
A SHORT TOPOLOGICAL PROOF OF A COMBINATORIAL RESULT
The Quarterly Journal of Mathematics, 1983 The author gives a topological proof of the following combinatorial theorem which easily implies a theorem of \textit{M. Talagrand} [Isr. J. Math. 40, 324-330 (1981; Zbl 0488.46016)] concerning the existence of copies of \(\ell^ 1_{\alpha}\) in closed subspaces of C(K), separating the points of K, for a compact space K which can be mapped continuously ...
openaire +3 more sources