Results 81 to 90 of about 491,261 (311)

Near‐Field Electrospinning Micro‐Printhead Achieves Precise Control of Nanofiber Deposition

Advanced Engineering Materials, EarlyView.
A micro‐printhead for near‐field electrospinning enables reproducible deposition of polymer nanofibers with diameters below 50 nm. Systematic parameter studies uncover the mechanisms linking operating conditions to fiber morphology, paving the way for precise and low‐cost nanoscale 3D manufacturing.As a high‐resolution, cost‐effective, and rapid ...
Han Xu, Dario Mager, Jan G. Korvink
wiley   +1 more source

Layered multi-group steered space-time shift-keying for millimeter-wave communications

, 2016
We propose a novel multi-user Multiple-Input Multiple-Output (MIMO) technique termed as the Layered Multi-Group Steered Space-Time Shift Keying (LMG-SSTSK) for the downlink of millimeter wave (mmWave) communications, which combines the concepts of Multi ...
El-Hajjar, Mohammed, Hanzo, Lajos, Hemadeh, Ibrahim, Won, Seunghwan   +3 more
core   +1 more source

Super-orthogonal space-time-frequency trellis coded OFDM

IET Communications, 2007
Super-orthogonal space-time trellis codes (SOSTTCs) given in the literature are full rate and provide full spatial diversity with high coding gain in narrowband quasistatic fading channels. The high number of parallel transitions in their trellis structure restricts their performance in wideband channels where the code performance suffers from ...
Kenan Aksoy, Ümit Aygölü
openaire   +1 more source

Rafting of Ni‐Based Superalloys Under Multiaxial Load as Understood by Phase‐Field Simulations and Critical Experiments

Advanced Engineering Materials, EarlyView.
Phase‐field simulations coupled with dislocation‐density‐based crystal plasticity modeling reproduce γ′ rafting behavior in single‐crystal Ni‐based superalloys under varied loading conditions. The model captures both macroscopic creep and microscopic morphology evolution, with results matching high‐temperature creep experiments.
Micheal Younan, David Bürger, Gunther Eggeler, Oleg Shchyglo, Ingo Steinbach, Muhammad Adil Ali   +5 more
wiley   +1 more source

Rethink delay Doppler channels and time-frequency coding

Journal of Information and Intelligence
In this paper, we rethink delay Doppler channels (also called doubly selective channels). We prove that no modulation schemes (including the current active VOFDM/OTFS) can compensate a non-trivial Doppler spread well. We then discuss some of the existing
Xiang-Gen Xia
doaj   +1 more source

MIMO-OFDM/OCDM low-complexity equalization under a doubly dispersive channel in wireless sensor networks

International Journal of Distributed Sensor Networks, 2020
In this article, three novel systems for wireless sensor networks based on Alamouti decoding were investigated and then compared, which are Alamouti space–time block coding multiple-input single-output/multiple-input multiple-output multicarrier ...
Ahmad AA Solyman, Hani Attar, Mohammad R Khosravi, Baki Koyuncu   +3 more
doaj   +1 more source

Ultra-stable clock laser system development towards space applications [PDF]

, 2016
International audienceThe increasing performance of optical lattice clocks has made them attractive for scientific applications in space and thus has pushed the development of their components including the interrogation lasers of the clock transitions ...
Bize, Sébastien, Bode, Sebastian, Bongs, Kai, Holleville, David, Häfner, Sebastian, Kulosa, André, Le Targat, Rodolphe, Lisdat, Christian, Lodewyck, Jérôme, Rasel, Ernst Maria, Singh, Yeshpal, Sterr, Uwe, Venon, Bertrand, Vogt, Stefan, Świerad, Dariusz   +14 more
core   +5 more sources

A Simple Variational Bayes Detector for Orthogonal Time Frequency Space (OTFS) Modulation [PDF]

IEEE Transactions on Vehicular Technology, 2019
The emerging orthogonal time frequency space (OTFS) modulation technique has shown its superiority to the current orthogonal frequency division multiplexing (OFDM) scheme, in terms of its capabilities of exploiting full time-frequency diversity and ...
W. Yuan, Zhiqiang Wei, Jinhong Yuan, Derrick Wing Kwan Ng   +3 more
semanticscholar   +1 more source

Multimodal Data‐Driven Microstructure Characterization

Advanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang, Santiago Benito, Özge Özgün, Sebastian Weber, Markus Stricker   +4 more
wiley   +1 more source

Overview of OTFS Based Channel Estimation Techniques in LEO Satellite Communication

天地一体化信息网络, 2022
With the development of science and technology and the continuous improvement of related technologies, low earth orbit (LEO) satellite communication has become a hot technology that countries all over the world are chasing.The advantages of orthogonal ...
Xinjie ZHAO, Ziwei LIU, Gengxin ZHANG
doaj   +2 more sources