Abstract: For a periodic structure with finite unit cells, the range where eigenvalues existed was estimated based on the eigenproblem of the unit cell. A more precise estimate of the eigenvalue distriution range for a one dimensional periodic structure with finite unit cells was presented based on the energy...
Abstract: The unsteady vertical water-entry and water-exit cavities produced by a high-speed body were investigated theoretically, the mathematical models of the water-entry and water-exit cavities were proposed, and the solutions of the cavity shape varying with water depth were derived. Based on the solutio...
Abstract: The FitzHugh-Nagumo equation was studied with an approximate analytical method: the differential transform method. Peakon soliton solutions to this equation were presented. As a result, more new types of peakon solutions were obtained. The convergence region and rate of the differential transform me...
Abstract: Calcium silicate hydrate(C-S-H) is the key component to determine the performance of the Portland cement based material C-S-H is a continuous solid material in hydration products. It accounts for 50%~60% of the hydrated cement slurry volume. C-S-H is the main ingredient to decide the hardened cement...
Abstract: Aimed at the hypersonic aircraft X-43A in the research, the FE model was established. Natural frequency testing of the aircraft structure model was performed. The numerical values of natural frequency were compared with the experiment results, with errors at about 1%, which showed that the FE model ...
Abstract: A numerical model for three-dimensional flow induced vibration was proposed. It was conducted in order to further improve the solution of fluid-structure interaction problems, occurring in the nuclear power field such as the behavior of PWR fuel rod, stream generators and other heat exchangers’tubes...
Abstract: The stability of the slope with arc-shaped slip surface was studied based on the gradient-dependent non-local friction model and the gradient-dependent non-local material parameters were discussed. The material parameters, influence on the safety factor of slope stablity was analyzed from a microvie...
Abstract: When the ends are elastically constrained in vertical and rotation directions for the shallow arch, the natural frequencies and modes are quite different from those of the case of ideal hinged or fixed boundary condition, and the different constraint stiffness will change the nonlinear responses and...
Abstract: The bending problems for the Reissner plate with arbitrarily shaped inclusion or flaw were solved with the conformal transformation method and Faber series expanding. The analytical functions were expanded with Faber series, and the wave functions were expressed by n-order first-kind and second-kin...
Abstract: In order to deal with the great discrepancy between the expectations of users and the real performance in image retrieval, some improvement on building tree, retrieval and matching methods were made with great success both in accuracy and in efficiency. More precisely, a new clustering strategy was ...
Abstract: The solutions of a class of nonlinear inequalities were studied.The nonlinear inequalities were approximated by a family of parameterized optimization problems with twice continuously differentiable objective functions, then a smoothing trust region method with dogleg steps was applied to solve the ...
