Duffing system was linearized by equivalent linearization method based on energy difference,then,the random response of the linear system was solved by combining the pseudo excitation method and four-order symplectic geometry algorithm.

Several different equivalent linearization methods including AASTO,JPWRI,and California standards and the experiential formulae suggested by Hwang,Iwan and Jara on the LRB-bridges design were discussed.

An equivalent linear method considering frequency-dependent soil properties for seismic response analysis;

Five equivalent linear methods for the seismic analysis of seismically isolated bridges have been compared.

The seismic response of nonlinear site involving a lenticle is calculated by an equivalent linear method considering the effects of the lenticle.

The effective method of identifying Cu(Ⅱ);

And that shows high-efficiency predominant bacteria is an effective approach to dispose industrial wastewater.

It has impor- tant actual values and long-term values that efficiently know the important and urgent nature of strengthening and improving their ideological and moral construction,and actively exploring the effective methods of strengthening and improving it.

Based on this topic, this paper introduces what is covered in teaching a new culture, and presents some effective methods to help students have a keen insight into another culture.