Results 41 to 50 of about 63,589 (182)

Microstructure evolution mechanisms and a physically-based constitutive model for an Al–Zn–Mg–Cu–Zr aluminum alloy during hot deformation

open access: yesJournal of Materials Research and Technology, 2023
High-temperature flow features of the Al−Zn−Mg−Cu−Zr aluminum alloy was revealed by hot compression tests. The evolution mechanisms of dislocation clusters, subgrain, and dynamic recrystallization (DRX) grains, are thoroughly explored by EBSD and TEM ...
Daoguang He   +5 more
doaj   +1 more source

Mode Selection, Resource Allocation and Power Control for D2D-Enabled Two-Tier Cellular Network

open access: yes, 2016
This paper proposes a centralized decision making framework at the macro base station (MBS) for device to device (D2D) communication underlaying a two-tier cellular network.
Durrani, Salman   +3 more
core   +1 more source

Systematic investigation of the microstructure evolution and dynamic recrystallization mechanisms of as-cast Fe–TiB2 composites under different hot deformation parameters

open access: yesJournal of Materials Research and Technology, 2023
Fe–TiB2 composite shows great potential in lightweight materials for automotive parts due to its lightweight, high strength and high specific modulus etc.
Kai-yao Wang   +6 more
doaj   +1 more source

Optimized LTE Data Transmission Procedures for IoT: Device Side Energy Consumption Analysis

open access: yes, 2017
The efficient deployment of Internet of Things (IoT) over cellular networks, such as Long Term Evolution (LTE) or the next generation 5G, entails several challenges.
Ameigeiras, Pablo   +4 more
core   +2 more sources

Synergistic effect of Mn + Sc additions on the microstructure evolution and mechanical properties of Mg-Gd-Y-Mn-Sc alloy

open access: yesJournal of Materials Research and Technology, 2022
Mg-Gd-Y-Mn-Sc alloys with different Mn + Sc contents were prepared by hot extrusion and ageing treatment. The effect of Mn + Sc additions on the microstructures, tensile properties, and corresponding strengthening mechanisms of the as-extruded and peak ...
Zhao Yang   +7 more
doaj   +1 more source

Diffusive Mobile Molecular Communications Over Time-Variant Channels

open access: yes, 2017
This letter introduces a formalism for modeling time-variant channels for diffusive molecular communication systems. In particular, we consider a fluid environment where one transmitter nano-machine and one receiver nano-machine are subjected to Brownian
Ahmadzadeh, Arman   +3 more
core   +1 more source

Dissolution and reprecipitation of 14H-LPSO structure accompanied by dynamic recrystallization in hot-extruded Mg89Y4Zn2Li5 alloy

open access: yesJournal of Magnesium and Alloys, 2023
We investigate the variation induced in long-period stacking ordered (LPSO) structures, dynamic recrystallization (DRX), and mechanical performance of hot-extruded Mg89Y4Zn2Li5 alloys fabricated at different extrusion speeds (Ve = 0.4, 0.8, 1.0, 1.2 mm/s)
Wei Liu   +5 more
doaj   +1 more source

Dynamic recrystallization behavior of as-cast AZ91 magnesium alloy during hot compressive

open access: yesJournal of Materials Research and Technology, 2022
This work systematically studies the dynamic recrystallization (DRX) behavior of as-cast AZ91 magnesium alloy under hot compression deformation at 350 °C.
Shiwei Xu   +4 more
doaj   +1 more source

Evolution of Dynamic Recrystallization in 5CrNiMoV Steel during Hot Forming

open access: yesAdvances in Materials Science and Engineering, 2020
The dynamic recrystallization (DRX) behavior of 5CrNiMoV steel was investigated through hot compression at temperatures of 830–1230°C and strain rates of 0.001–10 s−1.
Zhiqiang Hu, Kaikun Wang
doaj   +1 more source

Non-linear Symmetry-preserving Observer on Lie Groups

open access: yes, 2008
In this paper we give a geometrical framework for the design of observers on finite-dimensional Lie groups for systems which possess some specific symmetries. The design and the error (between true and estimated state) equation are explicit and intrinsic.
Bonnabel, S., Martin, P., Rouchon, P.
core   +3 more sources

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