In this paper, rod-like Bi2S3 nanoparticles have been synthesized using gelatin as a capping agent by a one-pot solvothermal method. Furthermore, some samples were further characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), Raman spectroscopy, and other means. The results demonstrate that the Bi2S3 nanoparticles are rod-like with good purity. Furthermore, the prepared Bi2S3 nanostructures show high efficiency in the photodegradation of rhodamine B.
For the boring bar’s chatter, based on the built-in damping boring bar, a type of magnetorheological semi-active dynamic vibration absorbing boring bar component was proposed. And a nonlinear dynamical model of absorbing boring bar was established. An analytical solution for the system's dynamical response is obtained by the multi-scale method, which is verified by the numerical solution, and the changes in the boring bar system parameters on the effect of dynamic characteristic was explored, the results provide the basis for the monitored control of the boring bar’s cutting chatter.
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