Results 41 to 50 of about 77,866 (296)

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

Advanced Engineering Materials, EarlyView.
This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat, Guido Barale, John Stavridis, Ehsan Norouzi, Jin‐Yoo Suh, Dong‐Ik Kim, Luca Iuliano, Abdollah Saboori   +7 more
wiley   +1 more source

On Some Critical Issues of the LAGEOS-Based Tests of the Lense-Thirring Effect [PDF]

, 2010
We summarize some critical issues pertaining the tests of the general relativistic Lense-Thirring effect performed by I. Ciufolini and coworkers in the gravitational field of the Earth with the geodetic satellites LAGEOS and LAGEOS II tracked with the ...
Iorio, L.
core   +1 more source

Satellite laser ranging to GPS and GLONASS [PDF]

Journal of Geodesy, 2015
Satellite laser ranging (SLR) to the satellites of the global navigation satellite systems (GNSS) provides substantial and valuable information about the accuracy and quality of GNSS orbits and allows for the SLR-GNSS co-location in space. In the framework of the NAVSTAR-SLR experiment two GPS satellites of Block-IIA were equipped with laser ...
Sosnica, Krzysztof, Thaller, Daniela, Dach, Rolf, Steigenberger, Peter, Beutler, Gerhard, Arnold, Daniel, Jäggi, Adrian   +6 more
openaire   +2 more sources

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

Advanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

GNSS Real-Time ZTD/PWV Retrieval Based on PPP with Broadcast Ephemerides

Atmosphere
GNSS precise point positioning (PPP) plays an important role in retrieving atmospheric water vapor values and performing numerical weather prediction. However, traditional PPP relies on real-time orbits and clocks, which require continuous internet or ...
Zongqiu Xu, Shuhao Liu, Yantian Xu, Longjiang Tang, Nannan Yang, Gen Zhang   +5 more
doaj   +1 more source

Instrument data simulations for GRACE Follow-on: observation and noise models [PDF]

Earth System Science Data, 2017
The Gravity Recovery and Climate Experiment (GRACE) mission has yielded data on the Earth's gravity field to monitor temporal changes for more than 15 years.
N. Darbeheshti, H. Wegener, V. Müller, M. Naeimi, G. Heinzel, M. Hewitson   +5 more
doaj   +1 more source

A novel GNSS precise point positioning method based on spherical harmonic expansion

All Earth, 2023
The Global Navigation Satellite System (GNSS) precise point positioning (PPP) from carrier-phase data is influenced by complex elements. The error sources are divided into two categories according to their relation to the signal propagation path.
Yanchen Cao, Jinyun Guo, Hengyang Guo, Minghao Chang, Chunmei Zhao, Xin Liu   +5 more
doaj   +1 more source

Advancing Tests of Relativistic Gravity via Laser Ranging to Phobos [PDF]

, 2010
Phobos Laser Ranging (PLR) is a concept for a space mission designed to advance tests of relativistic gravity in the solar system. PLR's primary objective is to measure the curvature of space around the Sun, represented by the Eddington parameter $\gamma$
A Einstein, A Fienga, A Fienga, A Milani, André R. Girerd, AS Konopliv, B Bertotti, BA Ivanov, BG Bills, C.M. Will, CF Yoder, CF Yoder, CF Yoder, CM Will, CM Will, D Vokrouhlicky, DE Smith, DE Smith, DE Smith, DN Spergel, EG Adelberger, EG Adelberger, EM Standish, G Dvali, G Dvali, G Neukum, Hamid Hemmati, J Baer, J Müller, J Müller, James G. Williams, JBR Battat, JD Anderson, JD Bekenstein, JG Williams, JG Williams, JG Williams, JJ Degnan, JJ Degnan, JJ Degnan, John J. Degnan, JW Moffat, K Nordtvedt, K Nordtvedt, K Nordtvedt, M Chapront-Touzé, M Chapront-Touzé, M Efroimsky, MC Malin, MR Pearlman, N Arkani-Hamed, N Ashby, N Borderies, RA Jacobson, RD Reasenberg, RK Ulrich, RO Kuzmin, S Baeßler, S Godier, S Mouret, SG Turyshev, SG Turyshev, SG Turyshev, SG Turyshev, Slava G. Turyshev, SS Shapiro, T Damour, T Damour, T Damour, T Damour, T Damour, T Damour, T Damour, T Damour, TC Duxbury, TD Moyer, TD Moyer, TD Moyer, Thomas W. Murphy, TL Duvall, TL Duvall, TM Brown, TP Sotiriou, TW Murphy Jr, V Dikarev, V Lainey, VA Rubakov, VB Mendes, VB Mendes, William Farr, William M. Folkner, WK Hartmann, WM Folkner, WM Folkner, X Sun   +94 more
core   +2 more sources

Parameter Variation in Planetary Ball Milling of Titanium Aluminide Powder in XHV‐Adequate Atmosphere

Advanced Engineering Materials, EarlyView.
This study investigates the effects of milling parameters, including rotational speed, milling duration, and ball‐to‐powder ratio, on TiAl particle size and morphology in an XHV‐equivalent atmosphere. The creation of oxide‐free surfaces enhances the mechanical properties of green bodies.
Jytte Möckelmann, Armin Piwek, Julius Peddinghaus, Kai Brunotte, Bernd-Arno Behrens   +4 more
wiley   +1 more source

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

Advanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir, Jixing Lin, Yuncang Li, Li Zhu, Paul F. A. Wright, Cuie Wen   +5 more
wiley   +1 more source