Results 21 to 30 of about 909,795 (277)

Longitudinal stability augmentation of seaplanes in planing [PDF]

open access: yes, 2015
The towing tank experiments conducted at Yokohama National University from November 30 to December 9 in 2005 suggested a new way of suppressing a dangerous coupled motion between heave and pitch called porpoising. The research in this paper was developed
Brent Richard P.   +10 more
core   +2 more sources

Are spasticity, weakness, selectivity, and passive range of motion related to gait deviations in children with spastic cerebral palsy? A statistical parametric mapping study

open access: yesPLoS ONE, 2019
This study aimed to identify the relationships between clinical impairments and gait deviations in children with cerebral palsy (CP). A retrospective convenience sample of 367 children with CP was selected (3–18 years old) and divided in two groups based
E. Papageorgiou   +5 more
semanticscholar   +1 more source

Parametric Sparse SAR Imaging of Ground Moving Targets Integrated With Motion Compensation

open access: yesIEEE Access, 2018
Using the array technique, the multi-channel synthetic aperture radar (SAR) has the capability of high-resolution imaging, detection, and location of the ground moving targets, which is a powerful tool during the remote sensing of smart city.
Gang Xu   +5 more
doaj   +1 more source

Controlling spherical mobile robot in a two-parametric friction model

open access: yes, 2017
The theoretical mechanical model of the spherical robot with the flywheels located in a sphere is considered. The described design is intended for the motion control of a sphere on various trajectories.
G. Terekhov, V. Pavlovsky
semanticscholar   +1 more source

Nonrelative sliding gear mechanism based on function-oriented design of meshing line functions for parallel axes transmission

open access: yesAdvances in Mechanical Engineering, 2018
In this article, the design of a nonrelative sliding gear mechanism for parallel axes transmission is presented. First, the general meshing line functions were actively designed for the nonrelative sliding transmission between parallel axes.
Zhen Chen, Huafeng Ding, Ming Zeng
doaj   +1 more source

Influence of Joint Stiffness and Motion Time on the Trajectories of Underactuated Robots

open access: yesApplied Sciences, 2023
Underactuated robots have fewer actuators than degrees of freedom (DOF). Nonactuated joints can be equipped with torsional springs. Underactuated robots can be controlled in a point-to-point motion if they have a particular mass distribution that makes ...
Michele Tonan   +3 more
doaj   +1 more source

Entangling the motion of two optically trapped objects via time-modulated driving fields [PDF]

open access: yes, 2014
We study entanglement of the motional degrees of freedom of two tethered and optically trapped microdisks inside a single cavity. By properly choosing the position of the trapped objects in the optical cavity and driving proper modes of the cavity it is ...
Abdi, Mehdi, Hartmann, Michael J.
core   +2 more sources

Comparison of Motion Smoothing Strategies for Video Stabilization using Parametric Models

open access: yesImage Processing On Line, 2017
This paper is devoted to a rigorous implementation and to an exhaustive comparison of video stabilization techniques. These techniques aim at removing the undesirable effects of camera shake.
Javier Sánchez
semanticscholar   +1 more source

The Inverse Compositional Algorithm for Parametric Registration

open access: yesImage Processing On Line, 2016
We present an implementation of the inverse compositional algorithm for parametric motion estimation. It computes a global motion between two images using a non-linear least square technique.
Javier Sánchez
doaj   +1 more source

Quantum dynamics of a driven parametric oscillator in a Kerr medium

open access: yesScientific Reports, 2023
In this paper, we first analyze a parametric oscillator with both mass and frequency time-dependent. We show that the evolution operator can be obtained from the evolution operator of another parametric oscillator with a constant mass and time-dependent ...
E. Bolandhemmat, F. Kheirandish
doaj   +1 more source

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