Various methods, including firstand second-order perturbation theory and variational methods have been proposed for calculating the normal modes of a laterally heterogeneous earth. In this paper, we test all three of these methods for a simple one-dimensional example for which the exact solution is available: an initially homogeneous "string" in which the density and stiffness are increased in ...

The main objective of this study is to propose a methodology to build a parametric linear model of Flexible Multibody Systems for control design. This approach uses a combined Finite Element State Space Approach based on component modes synthesis and double-port approach. The proposed scheme offers the advantage of automatic assembly of substructures, preserving the elastic dynamical behavior o...

A calibration pattern detection method is proposed wherein a bimodal distribution is approximated for the intensity histogram of the calibration pattern. Because the histogram of the calibration pattern, such as black and white squares, is assumed to be bimodal, pattern detection is employed to determine the best threshold separating the two modes of the histogram. As most real images may inclu...

This paper presents the effects of intermediate location and time-varying end mass on the dynamic response of flexible robot manipulator with rotating-prismatic joint in tracing multi-straight-line path. The tip end of the flexible robot manipulator traces a multi-straight-line path under the action of external driving torque and axial force. Flexible arm which consist of a rotating-prismatic j...

The belief K-modes method (BKM) approach is a new clustering technique handling uncertainty in the attribute values of objects in both the cluster construction task and the classification one. Like the standard version of this method, the BKM results depend on the chosen initial modes. So, one selection method of initial modes is developed, in this paper, aiming at improving the performances of...

In this paper dynamic damping properties of a nominated flexible structural adhesive have been identified using an extended-direct modal based joint identification method. It has been revealed that damping characteristics of adhesive are correlated to both frequency and mode shape. Young’s and shear moduli increase with frequency but damping on the other hand, decrease. The results showed that ...

roy adaptation model in hemodialysis patients: a mixed method research hassani p[1]*, otaghi m[2] received: 17 may, 2012 accepted: 13aug, 2012 abstractbackground & aims: ram is used in ersd patients. nurses play important role in their adaptation. the goal of the study is to explain the adaptive and ineffective responses of hemodialysis patients based on ram in qualitative part, and to compare ...