For practical engineering structures, it is usually difficult to measure external load distribution in a direct manner, which makes inverse identification important. Specifically, typical problem, for the models (e.g., response matrix) are often ill-posed, resulting degraded accuracy and impaired noise immunity of identification. This study aims at identifying loads stiffened plate structure, t...

Optical beam shaping plays a key role in optics and photonics. In this work, meta-q-plate featured by arbitrarily space-variant optical axes is proposed and demonstrated via liquid crystal photoalignment based on a polarization-sensitive alignment agent and a dynamic micro-lithography system. Meta-q-plates with multiple-, azimuthally/radially variant topological charges and initial azimuthal an...

We demonstrate optical manipulation with an optical beam generated by a fractral zone plate (FZP). The experimental results show that the FZP beam can simultaneously trap multiple particles positioned in different focal planes of the FZP beam, owing to the multiple foci and self-reconstruction property of the FZP beam. The FZP beam can also be used to construct three-dimensional optical tweezer...

Abstract We present a semi-analytical method for computing the reflection and transmission coefficients at joints connecting an arbitrary number of semi-infinite orthotropic plates based on line-junction approximation. use wave approach describe reflection, mode conversion between eigenmodes vibro-acoustic equations plates. A detailed derivation is presented here first time meeting junction wit...

The tympanic plate is a small part of the temporal bone that separates the mandibular condyle from the external auditory canal. Fracture of this small plate is rare and usually associated with other bony fractures, mainly temporal and mandibular bone. There is a limited amount of literature on this subject, which increases the chance of cases being overlooked by physicians and radiologists. Thi...

This study is devoted to vibration and acoustic radiation of stiffened plates in the presence in-plane normal shear loads using finite element method. In structural modelling, plate stiffeners are treated as separate elements strain kinetic energies with an elastic boundary introduced. The results show good agreement those obtained other methods. Parametric studies that forces have obvious infl...