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We study free vibrations of a crystal plate of AT-cut quartz carrying a thin mass layer operating as a quartz crystal microbalance for mass sensing. The mass layer is imperfectly bonded to the crystal plate with its interface described by the so-called shear-slip model that allows a discontinuity of the interface displacement. The effect of mass layer in-plane shear stiffness is also considered. The...
According to the particularity of cold-region for its geographical and climatic environments where the oil-pipeline is laid, the author adopts suitably physical parameters and mathematical-physical models involved in the oil-pipeline system, to simulate the boundary conditions of ground surfaces and the region where oil-pipeline is located, constructing finite element (FE) analysis models of the coupled...
The TFR (Tampered Failure Rate) model was Proposed by Bhattacharyya and Soejoeti (1989) for step-stress accelerated life tests. This paper point out that the strategy provided in for seeking parameter estimates under normal stresses in step-stress Completely accelerated tests using the usual regression analysis is unreasonable, and offers a method of estimating Parameters under a normal stress. For...
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