Results 151 to 160 of about 25,027 (314)
Advanced Materials, EarlyView.Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje +7 more
wiley +1 more source
Space-Time Coding for Large Antenna Arrays
, 2006 Multiple-input multiple-output (MIMO) systems can greatly improve the capacity and performance of wireless communications. In particular, space-time coding techniques have received much attention in recent years as an efficient approach to achieving the ...
Yu, Xinying
core
Characteristics of the Radiating Element of a Planar Vivaldi Antenna Array with Improved Bandwidth
Известия высших учебных заведений России: РадиоэлектроникаIntroduction. The conventional approach to extending the operating frequency band of Vivaldi antenna arrays consists in increasing the radiating element length. However, this inevitably leads to an increase in the mass of the entire array, and, therefore,
I. V. Bobkov, Yu. V. Yukhanov
doaj +1 more source
Multi-feed, loop-dipole combined dielectric resonator antenna arrays for human brain MRI at 7 T. [PDF]
MAGMA, 2023 Wenz D, Dardano T.
europepmc +1 more source
Radioengineering, 1993 The presented program is devoted to the analysis of general ekvidistant antenna arrays. "The Antenna Array" computes gain, radiation resistance and directivity patterns of antenna systems.
openaire +2 more sources
Advanced Materials, EarlyView.Highly water‐soluble dicationic bis(indolium) dyes have been prepared, showing excellent two‐photon absorption and light emission. Their fluorescence behavior discloses an unusual increasing blue shift with increasing solvent polarity, which, in parallel, is beneficial for enhanced detection in biological media.
Carlos Benitez‐Martin +5 more
wiley +1 more source
, 2002 The performance of different direction finding algorithms for the circular arrays is investigated in this paper. Several direction estimation algorithms are studied with their pros and cons discussed.
Nix, AR +5 more
core
A universal space-time architecture for multiple-antenna aided systems
, 2012 In this tutorial, we first review the family of conventional multiple-antenna techniques, and then we provide a general overview of the recent concept of the powerful Multiple-Input Multiple-Output (MIMO) family based on a universal Space-Time Shift ...
Sugiura, Shinya +2 more
core +1 more source
Research on Development 3D Ground Penetrating Radar Acquisition and Control Technology for Road Underground Diseases with Dual-Band Antenna Arrays. [PDF]
Sensors (Basel), 2023 Fang L, Yang F, Xu M, Liu F.
europepmc +1 more source
A Functional 2D Carbon Allotrope Combining Nanoporous Graphene and Biphenylene Segments
Advanced Materials, EarlyView.The synthesis of a novel nanoporous graphene (NPG) is reported with biphenylene segments via thermal fusion of 12‐armchair porous graphene nanoribbons grown on gold surfaces. Characterization using STM, AFM, and DFT reveals low‐defect semiconducting behaviour and tunable band gaps.
Paula Angulo‐Portugal +14 more
wiley +1 more source