Results 81 to 90 of about 144,156 (294)

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

Policy Options for Connecting Remote Communities to Air Transportation Networks [PDF]

NITC-1550, 69A3551747112Passenger aviation is a driver of the US economy, contributing over 4% to US GDP every year. While most large metropolitan areas in the United States have easy access to global air transportation networks through major hub ...
National Institute for Transportation and Communities (NITC), Drukker, Austin, University of Arizona   +2 more
core  

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

Optimization of Deep Belief Network Based on Sparrow Search Algorithm for Rolling Bearing Fault Diagnosis

IEEE Access
This study addresses the randomness of training parameters in the Deep Belief Network (DBN) and proposes an optimization method for rolling bearing fault diagnosis based on the Sparrow Search Algorithm (SSA).
Donghao Xu, Cheng Li
doaj   +1 more source

Implementation of the mathematical model of interaction of passenger transport modes for sustainable economic development [PDF]

MATEC Web of Conferences
As part of a research, the study of the level of solving the scientific problem of transport flow management in large cities was carried out as a component of the integrated information-intelligent transport system of the city.
Vasylenko Igor, Ozerova Olha, Pron Svitlana, Valko Alla, Lytvynenko Larysa, Maliarenko Dasha   +5 more
doaj   +1 more source

Centrality anomalies for the domestic air transportation networks in the USA: an empirical benchmark. [PDF]

Eur Phys J Plus, 2023
Sun LL, Hu YP, Zhu CP.
europepmc   +1 more source

Planar Solid‐State Nanopores Toward Scalable Nanofluidic Integration Based on CMOS Technology

Advanced Engineering Materials, EarlyView.
We present a scalable silicon‐based fabrication strategy for planar solid‐state nanopores to enable their integration with complex nanofluidic systems. Prototype devices demonstrate normal voltage‐current characteristics, good noise performance, and appreciable streaming currents. Our CMOS‐compatible fabrication process offers precise geometric control
Ngan Hoang Pham, Chenyu Wen, Mohammad Hadi Khaksaran, Won‐Yong Lee, Javier Cruz, Klas Hjort, Dongping Wu, Shi‐Li Zhang   +7 more
wiley   +1 more source

How to become a commuter air carrier [PDF]

Under Title 49 of the United States Code ("the Statute"), anyone who wants toprovide air transportation service as an air carrier must first obtain twoseparate authorizations from the Department of Transportation: "safety"authority in the form of an Air ...
United States. Department of Transportation. Air Carrier Fitness Division
core  

Practical Predefined-Time Fractional-Order Sliding Mode Control for Quadrotors with Variable Exponential Coefficients

Applied Sciences
This article addresses the trajectory tracking control problem for quadrotor unmanned aerial vehicles (UAVs) subject to complex external disturbances and parameter uncertainties.
Zhenyong Luo, Yongping Li, Xinhan Li, Liting Zhu   +3 more
doaj   +1 more source

On the Lightweight Potential of Laser Additive Manufactured NiTi Triply Periodic Minimal Sheet Lattices

Advanced Engineering Materials, EarlyView.
This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo, Shuo Qu, Shiming Gao, Xu Song   +3 more
wiley   +1 more source