Results 21 to 30 of about 729 (216)
Methods for determining the phase difference of the output signals for the receiving elements of a phased antenna array in a radiophoton circuit with parallel and series pairwise connection of electro-optical modulators [PDF]
Научно-технический вестник информационных технологий, механики и оптики, 2021 Obtaining accurate phase values of the output signals for the receiving elements of a phased array antenna is one of the crucial issues relating to radio-photon technologies in radar and radio communication.
Yaroslav N. Gusenitsa +3 more
doaj +1 more source
IEEE AccessAtmospheric turbulence degrades long-range electro-optical (EO) imagery with geometric warping, blur, and temporal jitter. We present a CPU-only, registration-free, tile-wise multi-frame fusion operator specifically tailored for embedded mission systems ...
Zuhal Hancer +2 more
doaj +1 more source
AI-based defect detection and self-healing in metal additive manufacturing
Virtual and Physical PrototypingThis pilot study develops a process to evaluate in-situ defect detection and self-healing in Ti-6Al-4V fabricated using laser-based powder bed fusion.
Jan Akmal +9 more
doaj +1 more source
Electro-optics of confined systems
Journal of Colloid and Interface ScienceConfinement in microenvironments occurs in many natural systems and technological applications. However, little is known about the behaviour of the immersed nanoparticles. In this work we show that their diffusion, electro-orientation and electric field induced polarization can be determined through electric birefringence experiments.
Ana Cazorla +3 more
openaire +3 more sources
Electro-Optical Modulator Requirements for 1 Tb/s per Channel Coherent Systems
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2021 The electro-optical bandwidth and extinction ratio requirements of in-phase and quadrature modulators to enable 1 Tb/s per channel optical transmission rates are evaluated through numerical simulations.
Sandro Marcelo Rossi +3 more
doaj +1 more source
Journal of Materials Research and TechnologyThis study examines the effect of Gaussian and ring-shaped laser beam profiles on the microstructural development and mechanical properties of the PBF-LB/M processed nickel-based alloy Inconel 718 in its as-built and post-heat-treated conditions.
Matjaž Godec +11 more
doaj +1 more source
European Journal of Materials, 2022 Additive manufacturing (AM) by laser powder bed fusion (LPBF) involves melting of layers of powder onto a substrate, called a building platform. Due to cost or convenience considerations, building platform materials rarely match the LPBF material ...
Abdul Shaafi Shaikh +3 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar +2 more
wiley +1 more source
Design of programmable multi-wavelength tunable filter on lithium niobate
Results in Physics, 2019 Tunable optical filters have a wide range of applications, especially in optical sensing systems and optical communication systems. In this letter, a programmable multi-wavelength tunable filter on Lithium Niobate (LN) is designed.
Yuan Yao +6 more
doaj +1 more source
In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy
Advanced Engineering Materials, EarlyView.A Ni–Cr–Al–Nb superalloy with a bimodal γ′–γ″ precipitate distribution is developed. Composite precipitate assemblies form through heterogeneous nucleation, effectively impeding dislocation motion. Micropillar compression reveals high strength at room and elevated temperatures, governed by precipitate shearing, with coupled faulting mechanisms ...
Ujjval Bansal +4 more
wiley +1 more source