Results 1 to 10 of about 3,077,333 (252)

A bound-constrained formulation for complex solution phase minimization [PDF]

Geoscientific Model Development
Prediction of mineral phase assemblages is essential to better understand the dynamics of the solid Earth, such as metamorphic processes, magmatism and the formation of mineral ore deposits.
N. Riel, N. Riel, B. J. P. Kaus, B. J. P. Kaus, B. J. P. Kaus, A. de Montserrat, E. Moulas, E. Moulas, E. Moulas, E. C. R. Green, H. Dominguez   +10 more
doaj   +1 more source

A Hybrid Approach to Enhanced SGP4 for Galileo Constellations

Applied Sciences
An up-to-date catalog of residents space objects orbiting Earth requires a critical balance between computational efficiency and orbital prediction precision.
Edna Segura, Rosario López, Iván Pérez, Martín Lara, Juan Félix San-Juan   +4 more
doaj   +1 more source

Orbit Rendezvous Maneuvers in Cislunar Space via Nonlinear Hybrid Predictive Control

Dynamics
The NASA’s Artemis project intends to bring humans back to the Moon in the next decade. A key element of the project will be the Lunar Gateway, a space station placed in a peculiar, near rectilinear Halo orbit in the vicinity of a collinear libration ...
Dario Sanna, David Paolo Madonna, Mauro Pontani, Paolo Gasbarri   +3 more
doaj   +1 more source

Crystal chemistry and trace-element behaviour in tourmalines from Minas Gerais, Brazil [PDF]

European Journal of Mineralogy
A series of 17 museum tourmaline samples from several pegmatites of Minas Gerais, Brazil, were investigated by several techniques including single-crystal X-ray structure refinements, electron microprobe, and laser ablation inductively coupled plasma ...
F. Bomal, F. Hatert, S. Philippo, M. Guennou, M. Depret, H. Wang, P. Lefèvre, M. Erambert   +7 more
doaj   +1 more source

Data‐Driven Insights into Rare Earth Mineralization: Machine Learning Applications Using Functional Material Synthesis Data

Advanced Intelligent Systems
Understanding rare‐earth element (REE) mineralization mechanisms is essential for developing efficient separation strategies. Although the geochemical pathways that generate REE deposits are qualitatively known, quantitative links between specific ...
Juejing Liu, Xiaoxu Li, Yifu Feng, Zheming Wang, Kevin M. Rosso, Xiaofeng Guo, Xin Zhang   +6 more
doaj   +1 more source

Interplanetary Mission Performance Assessment of a TANDEM Electric Thruster-Based Spacecraft

Applied Sciences
The aim of this paper is to analyze the transfer performance of a spacecraft equipped with a TANDEM electric propulsion system in a classical interplanetary mission scenario targeting Mars, Venus, or a near-Earth asteroid. The TANDEM concept is a coaxial,
Alessandro A. Quarta
doaj   +1 more source

Virtual Element Method for Saturated Unconfined Seepage Flow Analysis

工程科学与技术
ObjectiveLocal mesh modification is one of the important approaches for solving the saturated unconfined seepage model when the fixed mesh method is used.
JIANG Wei, YANG Ting, OUYANG Ye, WU Yi, CHENG Yong, ZHENG Hong   +5 more
doaj  

Nature, origin and significance of a clayey cave deposit: Relationship between karst and Oligocene/Miocene tephra (NW Dinarides)

The Depositional Record
A limestone cave filled with montmorillonite clay was found in a hill above the karst plateau on the north‐eastern edge of the Adriatic Sea. The cave fill shows no correlation with sediments found in the surrounding caves or other known caves of the ...
Nadja Zupan Hajna, Pavel Bosák, Andrej Mihevc, Michał Banaś, Jiří Filip, Lukáš Krmíček, Lenka Lisá, Šárka Matoušková, Jan Rohovec, Roman Skála, Jiří Sláma, Martin Šťastný, Jaromír Ulrych   +12 more
doaj   +1 more source

Five Classical Elements: Earth, Wood, Fir, Air, Quintessence

, 2016
A series of artefacts exploring the classical elements of the universe, earth, sun, air, wood, and quintessence, challenge the emotional connection, awareness, sustainable design and material research approaches. The elements are historical, sociological, philosophical and essential matters.
openaire   +1 more source

Research on the simplified calculation method of non-limit active earth pressure of limited soil mass in adjacent foundation pits. [PDF]

PLoS One
Zhang Z, Wang Z, Xu F, Wu F, Liu Z, Chen X, Kang J.   +6 more
europepmc   +1 more source