Results 51 to 60 of about 2,072 (163)

Ionosphere comparison study of VGOS and global maps of Total Electron Content

open access: yes, 2021
Ionosphere comparison study of VGOS and global maps of Total Electron Content.Nataliya Zubko, Minghui Xu, Niko Kareinen, Tuomas Savolainen, Markku Poutanen. Total Electron Content (TEC) of the ionosphere is an important characteristic whose accurate
N. Zubko   +4 more
semanticscholar   +1 more source

VGOS Wideband Reception and Emerging Competitor Occupations of the VLBI Spectrum [PDF]

open access: yes, 2019
The VGOS wideband receivers cover a spectrum from 2 to 14 GHz. In this range, many frequencies are allocated to other services. VGOS provides up to four 1 GHz wide sub-bands, which can be tuned to frequencies where detrimental radio frequency ...
Winkel, Benjamin   +7 more
core  

Compactly supported detail field for high quality neural implicit surfaces

open access: yesComputer Graphics Forum, EarlyView.
Abstract Neural implicit surfaces are a powerful tool for encoding a surface as the zero level set of a neural function. Trained using gradient‐descent based optimizers, these methods however suffer from a low‐frequency bias that prevents them to fit fine details of the surface.
Guillaume Coiffier, Justine Basselin
wiley   +1 more source

Evidence of a non-equipartition energy regime in 1803+784 Core-shift and Faraday rotation measurements from simultaneous multi-frequency polarimetric VGOS observations [PDF]

open access: yes
Context. Compact jets from active galactic nuclei (AGN) are commonly assumed to be in equipartition between particle and magnetic-field energy densities at the regions where the radio emission dominates at centimetre wavelengths.
V. P'erez-D'iez   +3 more
semanticscholar   +1 more source

How to register a VGOS radio telescope at ITU and why it is important [PDF]

open access: yes, 2016
VGOS radio telescopes enable observations in the range of 2-14 GHz and are much more receptive for unwanted radio frequency interference. Some space-borne transmitters may cause detrimental radiation to VGOS receivers.
Hase,Hayo   +2 more
core  

Fluid Control with Localized Spacetime Windows

open access: yesComputer Graphics Forum, EarlyView.
Abstract We present a physics‐based fluid control method utilizing localized spacetime windows, extending force‐based fluid control to substantially larger simulation scales. In many practical editing scenarios, user‐specified objectives affect only a small region of an otherwise satisfactory simulation, resulting in optimal control force distributions
Y. Chen, D. I. W. Levin, T. R. Langlois
wiley   +1 more source

Selective Conversion of Polyolefin Waste to Branched Alkanes via Methane‐Free Tandem Hydrocracking–Isomerization

open access: yesAdvanced Science, Volume 13, Issue 21, 13 April 2026.
Scheme illustrating the selective conversion of plastic waste to isomerized C4‐C12 products using RuSZ1 under different reaction conditions. ABSTRACT In recent years, catalytic hydrocracking has emerged as a promising waste‐to‐feedstock solution for processing plastic waste.
Xinbang Wu   +8 more
wiley   +1 more source

Learning hydrocracking reaction dynamics via neural ODEs: A data‐driven, gradient‐interpretable lumped modelling framework

open access: yesThe Canadian Journal of Chemical Engineering, Volume 104, Issue 3, Page 1372-1386, March 2026.
This work demonstrates the application of neural ordinary differential equations (neural ODEs) for learning hydrocracking reaction kinetics directly from data, achieving robust predictions under noise and sparsity while preserving mechanistic interpretability through gradient‐based analysis of temperature‐ and concentration‐dependent reaction rates ...
Souvik Ta   +2 more
wiley   +1 more source

Kinetic Modeling of Vacuum Gas Oil Hydrotreatment using a Molecular Reconstruction Approach Modélisation cinétique de l’hydrotraitement de distillats sous vide utilisant une approche de reconstruction moléculaire

open access: yesOil & Gas Science and Technology, 2010
Vacuum Gas Oils (VGO) are heavy petroleum cuts (boiling points ranging from 350 to 550 ˚C) that can be transformed into valuable fuels (gasolines, diesels) by fluid catalytic cracking or hydrocracking.
Charon-Revellin N.   +3 more
doaj   +1 more source

RFI measurements at Bosscha observatory to prepare a new VGOS station

open access: yesJournal of Physics, Conference Series
A new VGOS (VLBI Global Observing System) radio telescope will be constructed at Bosscha Observatory Lembang, West Java, in cooperation between Shanghai Astronomical Observatory (SHAO) and Institut Teknologi Bandung.
S. Ramadhan   +4 more
semanticscholar   +1 more source

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