Results 61 to 70 of about 33,641 (337)
A New Method for Isomorphism Identification of Planetary Gear Train based on Improved Hamming Number
Jixie chuandong, 2020 The isomorphism identification is one of the indispensable processes in structure synthesis of planetary gear train.It is of great significance for the creation of novel planetary gear train with excellent transmission characteristics.A new method for ...
Sun Wei +4 more
doaj
Dynamics of early planetary gear trains [PDF]
A method to analyze the static and dynamic loads in a planetary gear train was developed. A variable-variable mesh stiffness (VVMS) model was used to simulate the external and internal spur gear mesh behavior, and an equivalent conventional gear train ...
August, R. +3 more
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Ecography, EarlyView.Correlative species distribution models (SDMs) are quantitative tools in biogeography and macroecology. Building upon the ecological niche concept, they correlate environmental covariates to species presence to model habitat suitability and predict species distributions.
Moritz Klaassen +3 more
wiley +1 more source
Jixie chuandong, 2012 Taking the three planetary differential gear train of crawler walking mechanism as an example,the mechanism power dividing and transmission ratio formula are derived by analytical method,the inherent laws and fast calculation method of planetary ...
冯仲
doaj
Vibration in Planetary Gear Systems with Unequal Planet Stiffnesses [PDF]
An algorithm suitable for a minicomputer was developed for finding the natural frequencies and mode shapes of a planetary gear system which has unequal stiffnesses between the Sun/planet and planet/ring gear meshes.
August, R., Frater, J. L., Oswald, F. B.
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Ecography, EarlyView.The rapid adoption of environmental DNA (eDNA) methods has drastically changed biodiversity monitoring efforts. It is often claimed that eDNA methods are more sensitive and efficient than conventional biodiversity monitoring methods, but it is often unclear what metrics support this claim.
Nicholas J. Iacaruso +4 more
wiley +1 more source
Gear tooth stress measurements of two helicopter planetary stages [PDF]
Two versions of the planetary reduction stages from U.S. Army OH-58 helicopter main rotor transmissions were tested at NASA Lewis. One sequential and one nonsequential planetary were tested.
Krantz, Timothy L.
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People and Nature, EarlyView.Abstract A keystone species is one whose influence is disproportionate to its abundance, the absence of which would change the dynamics of an ecological or human community. Despite its widespread use in the scientific literature, there is a limited understanding of how the keystone concept is defined or measured, or applied in practice, and especially ...
Natasha R. Serrao +5 more
wiley +1 more source
Selection of the optimal two-speed planetary gear train for fishing boat propulsion [PDF]
FME Transactions, 2020 Planetary gear trains (PGTs) offer numerous benefits when compared to conventional gear trains, e. g. multi-carrier planetary gear trains may be built by linking the shafts of different component planetary gear trains.
Troha Sanjin +3 more
doaj
Expansion of epicyclic gear dynamic analysis program [PDF]
The multiple mesh/single stage dynamics program is a gear tooth analysis program which determines detailed geometry, dynamic loads, stresses, and surface damage factors.
Boyd, Linda Smith, Pike, James A.
core +1 more source