15 research outputs found
Buckling of an orthotropic cylindrical thin shell with continuously varying thickness under a dynamic loading
365-370The buckling of
an orthotropic composite cylindrical shell with variable thickness, subjected to
a dynamic loading, is reported here. At first, the fundamental relations and Donnell
type dynamic buckling equation of an orthotropic cylindrical shell with
variable thickness have been obtained. Then, employing Galerkin's method, these
equations have been reduced to
a time dependent
differential equation with variable coefficients. Finally, for different
initial conditions and approximation functions, applying the Ritz type
variational method, analytical expression has been found for the dynamic
factor. Using these results, the effect of the variations of the power of time in
the external pressure expression, the loading parameter and
the ratios of the
Young's moduli on the dynamic factor are studied numerically for the case when the
thickness of the cylindrical shell varies as a power and exponential functions.
It has been observed that these effects change the dynamic factor of the
problem in the heading appreciably
Capturing Hand Motion with an RGB-D Sensor, Fusing a Generative Model with Salient Points
Hand motion capture has been an active research topic in recent years, following the success of full-body pose tracking. Despite similarities, hand tracking proves to be more challenging, characterized by a higher dimensionality, severe occlusions and self-similarity between fingers. For this reason, most approaches rely on strong assumptions, like hands in isolation or expensive multi-camera systems, that limit the practical use. In this work, we propose a framework for hand tracking that can capture the motion of two interacting hands using only a single, inexpensive RGB-D camera. Our approach combines a generative model with collision detection and discriminatively learned salient points. We quantitatively evaluate our approach on 14 new sequences with challenging interactions