This work developed a method that uses single monochrome high-speed camera without sacrificing the spatial resolution to measure both in-plane and out-of-plane full-field vibrations. By using two-dimensional digital image correlation (2D-DIC) algorithm, first extracts displacement field from measured virtual strains. Then it retrieves after eliminating motion-induced component. For validation, ...

Although a two-dimensional (2D) valve has excellent performance, the processing of its spiral groove high cost and is time-consuming. This paper proposes novel torque motor based on an annulus air gap (TMAAG) to replace negative feedback function reduce machining difficulty. In order study change law TMAAG, permeance was analyzed, then qualitative analytical model established. Orthogonal tests ...

The purpose of this study was to evaluate the use of 2D ultrasound elastography to assess tendon tissue motion and strain under axial loading conditions. Four porcine flexor tendons were cyclically loaded to 4% peak strain using a servo hydraulic test system. An ultrasound transducer was positioned to image a longitudinal cross-section of the tendon during loading. Ultrasound radiofrequency (RF...

BACKGROUND It is well documented that epidural adhesion is associated with spinal pain. However, the underlying mechanism of spinal pain generation by epidural adhesion has not yet been elucidated. OBJECTIVES To elucidate the underlying mechanism of spinal pain generation by epidural adhesion using a two-dimensional (2D) non-linear finite element (FE) analysis. STUDY DESIGN A finite element...

many earthquakes occur in iran every year and some of these earthquakes cause loss of life and property. consequently earthquake is one of challenging topics not only in iran but also in other active tectonic regions in the world. investigating the mechanism of earthquake as a natural disaster is the first and important step. to study earthquakes, different information such as geometry and beha...

Spruce wood, as all biosourced materials, is very sensitive to relative humidity changes, which can cause dimensional variations. In some cases, it leads eccentricity, degradation and deterioration of the wooden structures. The 3D methods evaluation spruce wood hydric behavior needs important financial resources investigation. That’s why, main objective this study develop technics 2D digital im...

We study the electronic transport in lowest Landau level of disordered two-dimensional semimetals placed a homogeneous perpendicular magnetic field. The material system is modeled by Bernevig-Hughes-Zhang Hamiltonian, which has zero energy modes due to material's intrinsic Berry curvature. These turn out be crucially important for density states and static conductivity system. develop an analyt...

This study aimed to evaluate the influence of loading on a maxillary central incisor with the periodontal ligament (PDL) represented by 2D elastic beam elements using a 2D finite element analysis. Two models (M) were built varying the PDL representation: Mh (homogeneous PDL) and Mht (heterogeneous PDL with beam3 elements). Stress and displacements were determined for three loading conditions (L...

Abs t rac t . A robust method is introduced for computing the camera motion (the ego-motion) in a static scene. The method is based on detecting a single planar surface in the scene directly from image intensities, and computing its 2D motion in the image plane. The detected 2D motion of the planar surface is used to register the images, so that the planar surface appears stationary. The result...

Whether and how fracture mechanics needs to be modified for small length scales and in systems of reduced dimensionality remains an open debate. Here, employing in situ transmission electron microscopy, atomic structures and dislocation dynamics in the crack tip zone of a propagating crack in two-dimensional (2D) monolayer MoS2 membrane are observed, and atom-to-atom displacement mapping is obt...