Results 31 to 40 of about 22,046,683 (361)
Machines, 2023 Mesh phasing has a dramatic impact on the static and dynamic behaviours of planetary gear systems. This research investigates the coupled phase-tuning mechanism of two-stage planetary gear systems and the corresponding relationship with the coupled ...
Pengfei Yan +4 more
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Outside the Safe Operating Space of the Planetary Boundary for Novel Entities
Environmental Science and Technology, 2022 We submit that the safe operating space of the planetary boundary of novel entities is exceeded since annual production and releases are increasing at a pace that outstrips the global capacity for assessment and monitoring. The novel entities boundary in
L. Persson +13 more
semanticscholar +1 more source
Planetary mass function and planetary systems [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 7 pages, MNRAS ...
openaire +4 more sources
Fault diagnosis method of shearer planetary gear transmission systemunder variable speed conditions
Gong-kuang zidonghua, 2021 When the shearer cuts the coal seam, the planetary gear transmission system of the traction unit is in a variable speed working condition, and the structure of the planetary gear transmission system is complicated.
MAO Qinghua1,2, +5 more
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Applied Sciences, 2022 As the foundation and core of various heavy aircraft transmission systems, the reliability level of large-scale aviation planetary mechanism restricts the economic affordability and service safety for the aircraft to a great extent.
Ming Li, Yuan Luo, Liyang Xie
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Planetary systems in star clusters [PDF]
Proceedings of the International Astronomical Union, 2014 AbstractIn the solar neighborhood, where the typical relaxation timescale is larger than the cosmic age, at least 10% to 15% of Sun-like stars have planetary systems with Jupiter-mass planets. In contrast, dense star clusters, characterized by frequent close encounters, have been found to host very few planets.
Kouwenhoven, M.B.N. +3 more
openaire +6 more sources
Machines, 2023 Planetary gear systems have many advantages over other gear systems. Previous studies on its dynamic characteristics mostly used Earth as the reference system, which is inconsistent with the actual working conditions of many planetary gear systems, such ...
Bingwei Gao, Yongkang Wang, Guangbin Yu
doaj +1 more source
Kepler detection of a new extreme planetary system orbiting the subdwarf-B pulsator KIC 10001893 [PDF]
, 2014 KIC 10001893 is one out of 19 subdwarf-B (sdB) pulsators observed by the Kepler spacecraft in its primary mission. In addition to tens of pulsation frequencies in the g-mode domain, its Fourier spectrum shows three weak peaks at very low frequencies ...
R. Silvotti +9 more
semanticscholar +1 more source
The HU Aqr planetary system hypothesis revisited [PDF]
, 2014 We study the mid-egress eclipse timing data gathered for the cataclysmic binary HU Aquarii during the years 1993-2014. The (O-C) residuals were previously attributed to a single ~7 Jupiter mass companion in ~5 au orbit or to a stable 2-planet system with
K. Goździewski +14 more
semanticscholar +1 more source
Conceptual Design of Rover’s Mobility System for Ground-Based Model [PDF]
Journal of Astronomy and Space Sciences, 2009 In recent years, lots of studies on the planetary rover systems have been performed around space advanced agencies such as NASA, ESA, JAXA, etc. Among the various technologies for the planetary rover system, the mobility system, navigation algorithm ...
Youn-Kyu Kim +4 more
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