Results 31 to 40 of about 9,835 (134)

Non-Gaussianity in Two-Field Inflation

, 2010
We derive semi-analytic formulae for the local bispectrum and trispectrum in general two-field inflation and provide a simple geometric recipe for building observationally allowed models with observable non-Gaussianity.
Peterson, Courtney M., Tegmark, Max
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Minimal Solvers for Monocular Rolling Shutter Compensation under Ackermann Motion

, 2017
Modern automotive vehicles are often equipped with a budget commercial rolling shutter camera. These devices often produce distorted images due to the inter-row delay of the camera while capturing the image.
Purkait, Pulak, Zach, Christopher
core   +1 more source

Sizing criterial for traction drives [PDF]

, 1983
A simplified traction drive fatigue analysis which was derived from the Lundberg-Palmgren theory is measured and the effects of rotational speed, multiplicity of contacts, and variation in the available traction coefficient on traction drive system life,
Coy, J. J., Loewenthal, S. H., Rohn, D. A.   +2 more
core   +1 more source

On the rotational dynamics of the Rattleback

, 2012
The Rattleback is a very popular science toy shown to students all over the world to demonstrate the non-triviality of rotational motion. When spun on a horizontal table, this boat-shaped object behaves in a peculiar way.
A Encinas-Oropesa, A I Akhiezer, A V Chumak, B A Kalinikos, C G Hu, C Mathieu, D Grundler, F G Aliev, G N Kakazei, J Jorzick, K Yu Guslienko, Kh Zakeri, M Bauer, M R Freeman, P F Carcia, R Arias, R D Averitt, R D Averitt, R P Stapele van, R Skomski, S M Chérif, T M Crawford, V V Kruglyak, V V Kruglyak, V V Kruglyak   +24 more
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滚轮轴线空间夹角检测方法探讨

Jixie chuandong, 2005
The ideal position of axes of roll and disk is parallel to each other in rolling drive.But,in fact,there is a skew angle between axes of roller and disk due to the mounting errors.The skew angle will infect the drive precision.For this reason,three ...
王国民, 姚正秋, 李国平, 马礼胜, 王建涛   +4 more
doaj  

Trajectory generation for the N-trailer problem using Goursat normal form [PDF]

, 1995
Develops the machinery of exterior differential forms, more particularly the Goursat normal form for a Pfaffian system, for solving nonholonomic motion planning problems, i.e., motion planning for systems with nonintegrable velocity constraints.
Murray, Richard M., Sastry, S. Shankar, Tilbury, Dawn   +2 more
core   +2 more sources

Research on Forming Quality of GH4169 Superalloy Multi-Step Hollow Turbine Shaft by Three-roll Skew Rolling

Journal of Modern Mechanical Engineering and Technology
Abstract: This paper innovatively proposes a three-roll skew rolling process for flexible forming of hollow turbine shaft, which solves the problems of long manufacturing process and low material utilization of hollow turbine shaft, the core component of aeroengine.
Si-Yuan Chen, Xue-Dao Shu, Yong-Ming Xu, Qian Chen, Hai-Jie Xu, Bao-Shou Sun, Ying Wang, Yi-Min Deng   +7 more
openaire   +1 more source

Effects of asymmetry on the dynamic stability of aircraft [PDF]

The oblique wing concept for transonic aircraft was proposed to reduce drag. The dynamic stability of the aircraft was investigated by analytically determining the stability derivatives at angles of skew ranging from 0 and 45 deg and using these ...
Fantino, R. E., Parsons, E. K., Powell, J. D., Shevell, R. S.   +3 more
core   +1 more source

Roller bearing geometry design [PDF]

A theory of kinematic stabilization of rolling cylinders is extended and applied to the design of cylindrical roller bearings. The kinematic stabilization mechanism puts a reverse skew into the rolling elements by changing the roller taper.
Pinkston, B. H. W., Savage, M.
core   +1 more source

Rolling Factors Deformations and Extensions of Canonical Curves

, 2000
A tetragonal canonical curve is the complete intersection of two divisors on a scroll. The equations can be written in `rolling factors' format. For such homogeneous ideals we give methods to compute infinitesimal deformations.
Stevens, Jan
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