Because stiff tissue deforms less than soft tissue under the same external compression, elastography can provide relative stiffness information of biological tissue. However, elastography suffers from artifact noise which may come from two dominant sources: decorrelation error and amplitude modulation error. In order to reduce artifacts and improve the quality of ultrasonic elastography, this p...

Abstract—The output error of the globoidal cam mechanism can be considered as a relevant indicator of mechanism performance, because it determines kinematic and dynamical behavior of mechanical transmission. Based on the differential geometry and the rigid body transformations, the mathematical model of surface geometry of the globoidal cam is established. Then we present the analytical express...

This paper investigates the Frequency Modulation Continuous Wave (FMCW) radar sensor for multi-target displacement measurement in Structural Health Monitoring (SHM). The principle of three-dimensional (3-D) displacement measurement of civil infrastructures is analyzed. The requirements of high-accuracy displacement and multi-target identification for the measuring sensors are discussed. The fun...

Random walks are studied on disordered cellular networks in 2-and 3dimensional spaces with arbitrary curvature. The coefficients of the evolution equation are calculated in term of the structural properties of the cellular system. The effects of disorder and space-curvature on the diffusion phenomena are investigated. In disordered systems the mean square displacement displays an enhancement at...

In this paper, a differential phase-modulated interferometer (DPMI) is proposed to compensate for the rotational error precision displacement measurement. DPMI, reference sharing same arm with measurement constructed. Using two interferometers differentially measure displacement, unbalanced environmental disturbance on can be minimized. An integrated 2 × array photodetector (APD) adopted in DPM...

To enable an accurate simulation of manufacturing processes, it is essential to characterise and model the mechanical behaviour sheet metals up large deformations. However, after onset necking, deformation becomes highly heterogeneous stress triaxial. By combining full-field measurements inverse methods, possible calibrate beyond necking. A possibility use virtual fields method, by extending it...