Nonlocal absorption of gold and silver nanostructures is studied with ADE-FDTD method. A Drude-Lorentz model of metal material is discretized and iterative coefficients are deduced in detail. Absorption characteristics of one-, two- and three-dimensional gold and silver nanostructures are studied. It shows that the nonlocal layered films conforms to the equivalent medium theory. In one- and two-dimensional cases, nonlocal absorption peaks are related to the nano scale and have no relation with the material. The nonlocal absorption properties of three-dimensional nanostructures are related to nanoscale, and to material as well. Nonlocal effect of three-dimensional nano structures is the strongest, and the blue shift of the absorption peak is larger. Therefore, three-dimensional gold and silver nano structures are expected to play a role in nano devices.

Adsorption characteristics of magnesium atoms on phosphorus-doped single-walled silicon nanotubes (SWSiNTs) are studied using plane wave pseudopotential method with generalized gradient approximation based on density functional theory. Adsorption energies of magnesium atoms on pure,phosphorus-doped and deformation effects (compressive or tensile) (6,6) SWSiNTs are calculated. Bond and Mulliken population of both pure and phosphorus-doped SWSiNTs are also analyzed.It shows that covalent bond and ionic bond conexist in armchair silicon nanotube superlattices doped with phosphorus atoms by forming ionic bond of Mg-P and Si-P,and enhancing ionic bond of Si-Si. Adsorption energy of Mg atom on SWSiNTs are improved significantly by doping phosphorus atoms. Adsorption energy are also increased under compressive deformation at 0.25%,0.50%,1.00%,1.25% and tensile deformation at 1.00%,1.25%. It enhances adhesion of interface of silicon nanotubes as reinforce combined with matrix.

A scheme of convolutional perfectly matched layer (CPML) absorbing boundary condition (ABC) is proposed, which is used to truncate finite-difference time-domain (FDTD) method modeling transient electromagnetic (TEM) response. It derives specially CPML formulation dealing explicitly with divergence of magnetic induction and conceives an algorithm calculating convolutional term of z component. Then, the scheme is validated by numerical modeling of a homogeneous half-space model. The results indicate that efficient calculation of TEM is achieved.

A method to calculate far-zone scattering fields of a target in half-space excited by TE wave is proposed.Formulas of Green's function in a pair of vector potentials is derived,by which far-zone scattering field H_z can be calculated.Core of the method is calculation of electric and magnetic currents and their spatial phase in near-zone,which is elaborated.Far fields of an example are considered,which validates the method.Finally monostatic RCS of Type 96 armored vehicle is calculated.It is found that the maximum RCS is reached at head-in incidence case.

A kind of numerical simulation algorithms for instabilities of fluid interfaces,Ghost Fluid Method, is discussed.The setting of fluid variables in ghost regions is directly based on multiple dimensional cases.Moreover,non-splitting high resolution schemes are used to solve the fluid dynamic equations. At last, the algorithm is applied to the simulation of interface instabilities of fluid dyanmics,and satisfied numerical results are obtained.