Thinking about Chinese Supervision System from Enron event;

The alternative defensive ability of structures refers to their ability to adjust the internal forces automatically to avoid the continuation of damage and maintain the whole structure stability when local members failed unexpectedly due to abnormal events or severe local overloading.

In this paper,according to the distribution characters of dead and live load,as well as the character of abnormal event,the load effect combination applying to the analysis of alternative defensive ability is deduced on the base of probability theory and structural reliability.

The paper argues that identity can be proved by from appropriate probabicity problems,and identity can be obtained by making use of the fact that the probabicity of certain event is 1.

Visualization of security events is an important component of large-scale network security warning.

When processing large-scale network security events,a network security situation evaluation system can be useful and help user to deal with these security events.

Research of security event correlation approach based on attack-symptom;

The investigation and policy of endangering network security events;

Its idea is that mining security events from a large numbers of operation events by cooperative distributed security components, make effect evaluation to the CIA of information assets, then, realize automatically the cooperate between security domain and business domai.