Based on a brief description of Corrected Smoothed Particle Hydrodynamics (CSPH) method, the discretization scheme of conservation equations in axisymmetric coordinate systems is developed and a method to determine the number of particles in the computational domain is proposed. Numerical examples for hypervelocity impact are carried out and the results clearly show that CSPH is not only a suitable method for the simulation of large deformation problems in impact dynamics, but also a new method with the advantages that can not be replaced by finite element/ finite difference method.

First principle method is used to study the electronic properties of doped nanotubes. Compared with the pure carbon nanotube, the carbon nanotube doped with one Fluorine atom can exist stably and has better properties in field emission. This material design is on atomic level.

Fast evaluation of frequency domain free surface Green Function with sufficient accuracy is the key of frequency domain approach for solving hydrodynamic problems.In this paper,the fast caculation of free surface Green Function and its derivatives (frequency domain,infinite depth) is investigated and discussed.This approach is shown to be applicable and efficient.