نتایج جستجو برای: fixed reference frame

تعداد نتایج: 549875  

Journal: :Symposium - International Astronomical Union 1995

2013
Yi Liao Mei Yu Wencheng Yang

According to investigating impact of complexity of stereoscopic frame pairs on stereoscopic video coding and transmission, a new rate control algorithm is presented. The proposed rate control algorithm is performed on three levels: stereoscopic group of pictures (SGOP) level, stereoscopic frame (SFrame) level and frame level. A temporal-spatial frame complexity model is firstly established, in ...

Journal: :Cognition 2012
Nicolas Davidenko Stephen J Flusberg

Visual processing is highly sensitive to stimulus orientation; for example, face perception is drastically worse when faces are oriented inverted vs. upright. However, stimulus orientation must be established in relation to a particular reference frame, and in most studies, several reference frames are conflated. Which reference frame(s) matter in the perception of faces? Here we describe a sim...

Journal: :I. J. Bifurcation and Chaos 2011
Slawomir Zólkiewski

The problem considered in this paper is one of damped vibrations of the beam in transportation. The dynamical analysis of systems in motion is a very well-known issue, but many detailed cases have not been published yet. The considered case is applied with the double-sided fixed beams placed on a rotational disk. The disk treated as a rigid one is rotated with a constant angular velocity in the...

Journal: :Journal of biomechanics 2008
Hippolite O Amadi Ulrich N Hansen Andrew L Wallace Anthony M J Bull

The aim of this study was to define a body-fixed coordinate frame for the scapula that minimises axes variability and is closely related to the clinical frame of reference. Medical images of 21 scapulae were used to quantify 14 different axes from identifiable landmarks. The plane of the blade of the scapula was defined. The orientations of the quantified axes were calculated. The angular relat...

1995
W. Stamps Howard Milos Zefran Vijay Kumar

In this paper, methods of differential geometry and properties of Lie groups are used to show that in any conservative system subjected to a non zero external load, if one examines motions in SE(3), the special Euclidean group of rigid body motions in three dimensions, the resulting 6 ́6 stiffness matrix is asymmetric in any inertial (fixed) or body-fixed reference frame. We prove that in any su...

2003
J. Chen A. Behal D. M. Dawson W. E. Dixon

In this paper, we design an adaptive kinematic controller that asymptotically regulates a robot end-effector to a desired position and orientation under visual feedback (of points located on a fixed reference frame) from a camera mounted on the end-effector. This task is accomplished despite lack of depth measurements as well as uncertainty in the camera intrinsic parameter matrix.

2015
Chuan Xue Blerta Shtylla Anthony Brown

To calculate the RDF, for each time frame we used the centers of the neurofilaments in the domain [−0.2μm, 0.2μm] × [−0.2μm, 0.2μm] as reference points. We chose to use reference points in a smaller domain in order to avoid boundary effects. For each reference point we binned the center-to-center distances (r) between the reference neurofilament and all other neurofilaments with a bin size ∆r =...

2008
Gianluca U. Sorrento Denise Y.P. Henriques

The aim of this study was to further understand how the brain represents spatial information for shaping aiming movements to targets. Both behavioral and neurophysiological studies have shown that the brain represents spatial memory for reaching targets in an eye-fixed frame. To date, these studies have only shown how the brain stores and updates target locations for generating a single arm mov...

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