The formation and variation of snow disaster vulnerability of animal husbandry is the output of the constant variation of the whole structure and function of snow disaster system.

Theory and practice on disaster system research in a fourth time;

Theory and practice on disaster system research in a fifth time

It was considered that the long period without severe flooding on the lower reaches of Yellow River during 70 -870 A D is assuredness based on the historical recordation and by using the disaster system analysis.

The characteristics and safety state index of a gas dynamic system are discussed on the basis of analysis of a gas hazard system.

Proceeding from the systematic theory, this paper analyses the main feature of natural hazard system in Chinese coastal zone.

Cellular Automata is mainly used to simulate hazard system and help people to reveal the evolution mechanism of landslides and fires etc.

According to the theory of disaster system, the patterns of fog disaster system and disaster chain are established, disaster chain of fog with airport and freeway as the exposure are put forward.

This paper summarizes the lessons drawn from the fact that this year′s snow and ice disaster has caused great harm to power network.

An extremely rare snow and ice disaster hit the south area of China in January,2008,seriously influencing people s production and life.

This article reflects the damages to the national electrical network caused by the snow and ice disaster in 2008.

The 110 kV and above voltage line faults occurred in Qujing Power System during the ice disaster in 2008 are retro-spect, showing that the single-phase breakdown is over 86% to the total.