Security System Verification Based on Information Flow Analysis;

Following the national requirements of the classified criteria for information security, this paper studies about the theory of developing high level security system, which consists of security policy model design, information flow analysis and etc.

The sky luminance distribution model is developed by information analysis methods with ant colony system.

This paper use time history analysis to analyze the seismic response of the parallel composite isolation system.

The paper introduces the basic ideas and process of the time history analysis in the seismic design,researches some aspects in selecting the seismic wave input,analyzes its calculation result.

Code for Seismic Design of Building(GB50011-2001) demands:two strong motion recordings are needed to choice in time history analysis method.

Author count a lot of actual earthquake record and devide them into groups, so produce the principle of importing earthquake wave in the time history analysis method and verify it.

According to the site condition,the fortified intensity,the duration,and the fitting degree between the response spectra of seismic records and those of the code,this paper presents one way of selecting seismic records for time history analysis method.