Results 91 to 100 of about 306,106 (208)

Reassessing Sub-Neptune Structure, Radii, and Thermal Evolution

open access: yesThe Astrophysical Journal
We present a novel python-based 1D sub-Neptune evolution model that emphasizes the thermal evolution and potential solidification of the rock/iron core and the structure of the radiative atmosphere. This model explores planetary structure from the molten
Yao Tang   +5 more
doaj   +1 more source

双模式机电复合无级传动功率分流特性分析

open access: yesJixie chuandong, 2014
Electro-mechanical variable transmission(EVT)system can enhance the fuel economy by adjusting the engine operating points,and take full advantage of high efficiency of the mechanical transmission.So it is a good solution for applying the hybrid ...
吉雅太   +3 more
doaj  

Stable Stratification of the Helium Rain Layer Yields Vastly Different Interiors and Magnetic Fields for Jupiter and Saturn

open access: yesThe Planetary Science Journal
At sufficiently high pressures (∼Mbar) and low temperatures (∼10 ^3 –10 ^4 K), hydrogen and helium become partly immiscible. Interpretations of Jupiter’s and Saturn’s magnetic fields favor the existence of a statically stable layer near the Mbar pressure
S. Markham, T. Guillot
doaj   +1 more source

Research on Jupiter's magnetic field: Review and prospect

open access: yes地球与行星物理论评
The internal structure and dynamics of different planets are different, so some planets have an intrinsic magnetic field, and some have not yet found an intrinsic magnetic field.
Weidong Gu   +6 more
doaj   +1 more source

A bibliography of planetary geology principal investigators and their associates, 1982 - 1983 [PDF]

open access: yes
This bibliography cites recent publications by principal investigators and their associates, supported through NASA's Office of Space Science and Applications, Earth and Planetary Exploration Division, Planetary Geology Program.
Plescia, J. B.
core   +1 more source

圆形活齿与摆线针轮行星传动的动力学仿真及性能研究

open access: yesJixie chuandong, 2013
The circle movable tooth planetary transmission is a new movable tooth planetary transmission by using profile alternative theory to replace cycloidal tooth profile,on the basis of the structure of pin-cycloid transmission.The virtual prototype model is ...
韩敏, 徐艳妮, 刘坤, 王军洁
doaj  

Analysis of the Fatigue Characteristic of 2K-H Wind Power Helical Planetary Gear Train

open access: yesJixie chuandong, 2020
In order to accurately estimate the fatigue life of the wind power planetary gear train under actual working conditions, the 1.5 MW 2K-H helical gear planetary gear train is taken as the research object.
Mingming Su, Mutellip Ahmat, Xingwei Tao
doaj  

Structure and Melting of Fe, MgO, SiO2, and MgSiO3 in Planets: Database, Inversion, and Phase Diagram

open access: yesThe Planetary Science Journal
We present globally inverted pressure–temperature ( P – T ) phase diagrams up to 5000 GPa for four fundamental planetary materials, Fe, MgO, SiO _2 , and MgSiO _3 , derived from logistic regression and supervised learning, together with an experimental ...
Junjie Dong   +4 more
doaj   +1 more source

Research of the Transmission Characteristic of Planetary Gear Train based on the Signal Flow Graph Method

open access: yesJixie chuandong, 2018
Based on the transmission principle of planetary gear train,a method by using the signal flow graph is proposed to calculate the torque of complex planetary gear train.
Zhou Xintao   +3 more
doaj  

Can Jupiter’s Atmospheric Metallicity Be Different from the Deep Interior?

open access: yesThe Astrophysical Journal
Updated formation and structure models of Jupiter predict a metal-poor envelope. This is at odds with the two to three times solar metallicity measured by the Galileo probe. Additionally, Juno data imply that water and ammonia are enriched.
Simon Müller, Ravit Helled
doaj   +1 more source

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