Results 131 to 140 of about 16,005 (251)
Methods in Ecology and Evolution, Volume 17, Issue 5, Page 1617-1627, May 2026.Abstract Ecologists and evolutionary biologists are increasingly turning to 3D models to use in scientific research. Natural history museums are one of the primary sources for specimens used as 3D models, and efforts are underway to digitize their collections using methods like photogrammetry.
Jeremy D. Pustilnik, Genevieve S. Rios
wiley +1 more source
Analysis of Dynamics Characteristic of the Helical Gear Transmission in Helicopter
Jixie chuandong, 2015 The multiaxial helical gear transmission is widely used in helicopter for parallel operation. The dynamics model of the helical gear transmission is established for system inherent characteristic analysis,and the dynamic response is obtained.
Liu Tao, Li Jie, Dai Jinchun
doaj
Advanced Rotorcraft Transmission (ART) program summary [PDF]
The Advanced Rotorcraft Transmission (ART) Program was initiated to advance the state of the art for rotorcraft transmissions. The goal of the ART Program was to develop and demonstrate the technologies needed to reduce transmission weight by 25 pct. and
Kish, J. G., Krantz, T. L.
core +1 more source
Calculation of sub-surface-initiated fatigue fractures in gears [PDF]
, 2019 Power-transmitting gears are typically heat-treated, most often case-hardened, to improve the fatigue strength and therefore to ensure higher fatigue life.
Müller, Daniel +2 more
core
Jixie chuandong, 2010 A method to improve the dynamic characteristics of gear system is proposed through the selection of spiral angle of helical gear according to gear system dynamics theory.Based on the finite element theory,the laws of tooth load distribution in long ...
唐毅, 杨军
doaj
Jixie chuandong, 2011 Parametric design is to use parameters to describe sizes of parts.When the part is designed,the shape of parts is changed by modifying characteristic parameters to achieve the sizes to drive the graphics.Cylindrical involute helical gear is a part of ...
王书贤, 汪云, 邓利军, 张王进
doaj
Passive solar array orientation system /thermal heliotrope/ Final report, 23 Dec. 1968 - 23 Sep. 1969 [PDF]
Tracking requirement, design, and fabrication of passive solar array orientation system using bimetal ...
Byxbee, R. C., Lott, D. R.
core +1 more source
Jixie chuandong, 2009 In order to get the gear parameter model under the CAE software circumstances,it has formed the transverse profile of a helical gear at first.Then the parameterized model of the helical gear pair is generated directly by swept along helix with APDL in ...
袁安富, 郑祺
doaj
Lubricant Jet Flow Phenomena in Spur and Helical Gears with Modified Addendums; for Radially Directed Individual Jets [PDF]
This paper develops the mathematical relations for the Virtual Kinetic Model as an improvement over the vectorial model developed earlier. The model solution described provides the most energy efficient means of cooling gears, i.e., it requires the least
Akin, Lee S., Townsend, Dennis P.
core +1 more source
STRENGTH SIMULATION OF PLASTIC HELICAL GEARS IN NEW CAR DOOR LOCK BASED ON FINITE ELEMENT ANALYSIS
Jixie qiangdu, 2017 To study the stress of plastic helical gears in the new type car door lock under the working condition,establish the finite element model of helical gear mesh through ABAQUS,the contact process of plastic helical gears is simulated and analyzed based on ...
YANG Meng, KAN ShuLin, XIE Chao
doaj