Especially,in long period structures,displacement is mainly controlled by transient vibration.

In the light of being short of broadband strong seismic records in aseismic design of long period structures at present, using reflectance, contour integral and other methods of synthetic earthquake ground motion, the character of long period for earthquake ground motion is approached.

The simulation results also indicate that the destruction or collapse of long period structure does not happen at the appearing instant of the greatest intensity of earthquake ground motion,but frequently at the final stage of earthquake ground motion,or even after the earthquake ground motion completely ends,which can provide scientific basis for the structure design and safety.

Effect of solidification conditions on the formation and structures of long period stacking structures in the Mg-Zn-Y alloys;

Formation of long period stacking structures in Mg-Gd-Y-Zn alloy studied by in-situ quasi-dynamic back-scattering electron microscopy;

The characteristics of long period stacking structures(LPS)formed in these alloys were studied by TEM and SEM.

83C martensite aged at room temperature, indicating the existence of long-period ordered phase.

We mainly studied the extraordinary optical transmission through subwavelength periodic structure in metallic film.

Preparation and Optical Property of PZT Ferroelectric Thin Films/LaNiO_3 Thin Films Periodic Structure;

Theoretical analysis showed that under well specified conditions, electromagnetic slow wave can interact stationary with moving periodic structure,based on that the a working principle can be proposed for a class of MEMS motor and actuator.

As a result, waves can propagation along the periodic structures only with in specific frequency bands called the “Pass bands” and wave propagate is completely blocked with other frequency bands called the “Stop Bands”.

Study on Mechanical and Electromagnetic Dynamic Characteristics of Materi/als with Periodic Structures;

After analyzing the coefficient matrices of periodic structures resulted from the finite element method(FEM), a FEM with partial assemblage was put forward.

In this paper, the problem of the superposition of two film systems with periodic structures is discussed theoretically, reaching a conclusion that the cut off of the superposition has non-interference characteristics of each film system.