Abstract. In order to study the mechanical performance and the overall performance of the reinforced concrete frame structure with stairs under the earthquake action, this paper uses SAP2000 to model the reinforced concrete frame structure with and without staircase, calculate elastic seismic response of the models by response spectrum method and bottom shear method. The results show that the stairs have significant influence on the seismic lateral stiffness, vibration mode and internal force of frame beam column of the reinforced concrete frame structure.
The signature database of intrusion detection system is usually built by the short sequences of system call. The real-time efficiency and accuracy of intrusion detection is greatly influenced by the scale of signature database and the approach of intrusion data analysis. In this paper, a typical set method is provided to compress the normal signature database. Using the data set of UNM CERT sendmail for testing, the feasibility of typical set method is validated, and a proper rate of typical set for intrusion detection is proposed. Meanwhile, the LSM (Linux Security Modules) framework is presented to hook system calls and other audit data from operation system to build intrusion detection system signature database and identify intrusion activity. A system service process oriented detection idea is also introduced to make the intrusion detection more pertinent and accurate. Abnormal detection experiments results show good performance of our intrusion detection method.
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