Results 31 to 40 of about 2,580 (178)

Modèle de confinement pour les colonnes de section circulaire en béton armé confiné avec des enveloppes en polymère renforcé de fibres de carbone Confinement model for circular RC columns wrapped with CFRP composite

open access: yesMATEC Web of Conferences, 2012
Un programme experimental comprenant des essais sur 30 cylindres 160×320 mm a ete mene en vue de determiner le gain de resistance et de ductilite du beton confine par collage externe de tissu de polymere renforce de fibres de carbone (PRFC).
Benzaid R., Mesbah H-A.
doaj   +1 more source

Compósitos cimentícios de alto desempenho para aplicação como substrato de transição em vigas

open access: yesRevista ALCONPAT, 2016
Compuestos cementíceos de alto desempeño para su aplicación como sustrato de transición en vigas RESUMEN Este estudio muestra el desarrollo y análisis del comportamiento de los materiales compuestos de cemento reforzado con fibras de alto rendimiento ...
V. J. Ferrari   +2 more
doaj   +1 more source

Energy Efficiency and Asymptotic Performance Evaluation of Beamforming Structures in Doubly Massive MIMO mmWave Systems

open access: yes, 2017
Future cellular systems based on the use of millimeter waves will heavily rely on the use of antenna arrays both at the transmitter and at the receiver.
Buzzi, Stefano, D'Andrea, Carmen
core   +1 more source

Performances des colonnes en béton confiné avec des enveloppes externes en composites « PRFC »

open access: yes, 2011
Un programme expérimental comprenant des essais sur 30 cylindres 160x320 mm a été mené en vue de déterminer le gain de résistance et de ductilité du béton confiné par collage externe de tissu de polymère renforcé de fibres de carbone (PRFC). Les variables étudiées sont la résistance à la compression du béton non confiné f’co, le niveau de confinement ...
Benzaid, Riad   +2 more
openaire   +3 more sources

Scalable and Energy-Efficient Millimeter Massive MIMO Architectures: Reflect-Array and Transmit-Array Antennas

open access: yes, 2018
Hybrid analog-digital architectures are considered as promising candidates for implementing millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) systems since they enable a considerable reduction of the required number of costly radio ...
Fischer, Georg   +4 more
core   +1 more source

Hybrid MIMO Architectures for Millimeter Wave Communications: Phase Shifters or Switches?

open access: yes, 2015
Hybrid analog/digital MIMO architectures were recently proposed as an alternative for fully-digitalprecoding in millimeter wave (mmWave) wireless communication systems.
Alkhateeb, Ahmed   +4 more
core   +1 more source

Hybrid Analog-Digital Millimeter-Wave MU-MIMO Transmission with Virtual Path Selection [PDF]

open access: yes, 2016
In this letter, we propose a low-complexity hybrid precoding and combining design for the mmWave MUMIMO transmission, applicable to both fully-connected and subconnected structures.
Li, A, Masouros, C
core   +1 more source

Phylogenetic Analysis of Allorhizobium vitis Strains in the Okanagan Valley, British Columbia, Canada

open access: yesPlant Pathology, Volume 75, Issue 2, March/April 2026.
Four clades containing Okanagan Valley Allorhizobium vitis strains formed following phylogenetic analysis, displaying both genetic similarity and dissimilarity with similar grapevine host origins. ABSTRACT Grapevine crown gall (GCG), characterised by the formation of galls and root necrosis, is an economically devastating disease that affects ...
Portiaa McGonigal   +4 more
wiley   +1 more source

How are we choosing species for direct seeding restoration in megadiverse neotropical landscapes? Recommendations from projects implemented in Brazil

open access: yesRestoration Ecology, Volume 34, Issue 3, March 2026.
Direct seeding for ecological restoration is a cost‐effective and scalable method, but its effectiveness largely relies on choosing the appropriate species. Understanding the criteria used to select species is critical for optimizing restoration outcomes, especially in the face of limited resources and ongoing environmental changes.
Mariane C. Inocente   +6 more
wiley   +1 more source

PERFORMANCE OF TURBO CODED SIGNALS OVER PARTIAL RESPONSE FADING CHANNELS WITH IMPERFECT PHASE REFERENCE

open access: yesElectrica, 2011
In this paper, the performance of turbo coded signals are investigated over a new channelmodel, denoted as 1± Dn / Partial Response Fading Channels (PRFC) with imperfect phasereference.
Osman N. Ucan, Onur Osman, Aykal Gumus
doaj   +2 more sources

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