Results 51 to 60 of about 3,435,507 (205)
The planetary commons: A new paradigm for safeguarding Earth-regulating systems in the Anthropocene
Proceedings of the National Academy of Sciences of the United States of AmericaThe Anthropocene signifies the start of a no-analogue trajectory of the Earth system that is fundamentally different from the Holocene. This new trajectory is characterized by rising risks of triggering irreversible and unmanageable shifts in Earth ...
J. Rockström +21 more
semanticscholar +1 more source
Analysis of the Dynamic Load Sharing Characteristic of Two-stage Planetary Transmission
Jixie chuandong, 2016 To study the dynamic load sharing characteristics of two- stage planetary gear train,a translation- torsion coupling dynamics model is established by taking the nonlinear factors like time- varying mesh stiffness,position error,eccentric error,gear ...
Li Siqian, Wu Shijing, Wang Xiaosun
doaj
Resonant planetary dynamics: Periodic orbits and long-term stability
, 2013 Proceedings of 10th HSTAM International Congress on Mechanics, Chania, Crete, Greece, 25-27 May ...
Voyatzis, George +2 more
openaire +3 more sources
Jixie chuandong, 2011 Using 3D modeling software,geometric model of the wheel planetary gear reducer structure is established,based on heavy-duty truck wheel reducer planetary gear structure and the loading characteristics,a planetary gear structure of three-dimensional ...
王铁, 柴少彪
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Ocean dynamics shape marine heatwaves and their predictability
Nature CommunicationsMarine heatwaves have become more frequent and intense under anthropogenic warming, posing increasing threats to marine ecosystems and coastal societies, necessitating a better understanding of their mechanism and predictability.
Xianglin Ren, Wei Liu, Liping Zhang
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Alberta wildfire 2016: Apt contribution from anomalous planetary wave dynamics
Scientific Reports, 2018 In May-June 2016 the Canadian Province of Alberta suffered one of the most devastating wildfires in its history. Here we show that in mid-April to early May 2016 the large-scale circulation in the mid- and high troposphere of the middle and sub-polar ...
V. Petoukhov +5 more
semanticscholar +1 more source
Dynamics of [WR] Planetary Nebulae [PDF]
Symposium - International Astronomical Union, 2003 The formation of PNe around [WC] stars is modelled with a numerical hydrodynamics code. It is found that the PN around [WC] are expected to expand faster, and be more turbulent. It is shown that the observed lack of differences with ‘normal’ PNe, can have implications for models of the origin of asphericity in PNe.
openaire +1 more source
Jixie chuandong, 2018 Aiming at the problem of the low efficiency of NGWN-type planetary gear transmission with high speed ratio,the low-loss gear design that is optimizing modification coefficients and addendum coefficients simultaneously,reducing the contact ratio to reduce
Wang Jianxiang, Qin Datong
doaj
The Astrophysical JournalThe GJ 1148 system has two Saturn-mass planets orbiting around an M dwarf star on hierarchical and eccentric orbits, with orbital period ratio of 13 and eccentricities of both planets of 0.375. The inner planet is in the regime of eccentric warm Jupiters.
Longhui Yuan, Man Hoi Lee
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Fluid dynamics of planetary differentiation
Comptes Rendus. PhysiqueThe basic structure of the terrestrial planets—an iron-rich metallic core surrounded by a silicate mantle—was established during their accretion, when widespread melting allowed the metal and silicate phases to separate. The transfer of chemical elements
Deguen, Renaud +5 more
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