Based on the fact that the material shows the characteristic of elastic-plastic deformation and asymmetrical hysteresis when compacted,a nonlinear dynamic model of the roller-material system is established with hyster...
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Based on the fact that the material shows the characteristic of elastic-plastic deformation and asymmetrical hysteresis when compacted,a nonlinear dynamic model of the roller-material system is established with hysteretic character Enlightening by the classical model of stress-strain for *** nonlinear differential equation is worked out partly adopting the method of subsection linearization and the higher harmonics, especially the second harmonic,in dynamic responses of the drum are found obviously through *** similarity of experimental results and numerical solutions indicates the validity of the present modeling *** addition,the ratio of amplitude of the second harmonic to that of the first harmonic is nearly proportion to the coefficient of material rigidity.
Obesity and its co-morbidities such as diabetes,coronary heart disease and cancer are a fast growing health threat in today' s *** great efforts,pharmacotherapy of obesity has achieved little success to ***,novel ...
Obesity and its co-morbidities such as diabetes,coronary heart disease and cancer are a fast growing health threat in today' s *** great efforts,pharmacotherapy of obesity has achieved little success to ***,novel targets for body weight control are a pressing need in order to fight this *** receptor subtype-3 (BRS3) is a G-protein coupled receptor whose natural ligand remains ***3 is primarily expressed in the brain,particularly in the hypothalamus,a key center from controlling energy *** devoid of the BRS3 gene (knock-out) develop obesity and *** discovered novel,potent and selective BRS3 agonists that enable exploration of BRS3 biological function in vivo.
System identification and damage detection for structural health monitoring of civil infrastructures have received considerable attention recently. Time domain analysis methodologies based on measured vibration data, ...
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System identification and damage detection for structural health monitoring of civil infrastructures have received considerable attention recently. Time domain analysis methodologies based on measured vibration data, such as the least-squares estimation and the extended Kalman filter, have been studied and shown to be useful. The traditional least-squares estimation method requires that all the external excitation data (input data) be available, which may not be the case for many structures. In this paper, a recursive least-squares estimation with unknown inputs (RLSE-UI) approach is proposed to identify the structural parameters, such as the stiffness, damping, and other nonlinear parameters, as well as the unmeasured excitations. Analytical recursive solutions for the proposed RLSE-UI are derived and presented. This analytical recursive solution for RLSE-UI is not available in the previous literature. An adaptive tracking technique recently developed is also implemented in the proposed approach to track the variations of structural parameters due to damages. Simulation results demonstrate that the proposed approach is capable of identifying the structural parameters, their variations due to damages, and unknown excitations.
A total of 147 species of macro-fungi were identified in the Huangzhulin Nature Reservation Zone of Fujian Province, of which 117 species were edible and 30 species were noxious. The ecological environment and the dis...
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A total of 147 species of macro-fungi were identified in the Huangzhulin Nature Reservation Zone of Fujian Province, of which 117 species were edible and 30 species were noxious. The ecological environment and the distribution of fungal resources of the reservation zone are discussed.
The dc voltage of traction power modules is provided by uncontrolled diode and phase-controlled thyristor rectifiers in the present feeding system of high-speed maglev vehicles, Shanghai. However, there are distinct a...
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