Through summarizing the main causes of some big crowd accidents,this paper works out a crowd safety protection system for large scale social activities which covers the whole period of the activities.

It is summarized that the characteristics of stampede accident and the high-incidence areas in outdoor large-scale social activities based on statistics analysis concerned with global gathering place of the crowded stampede accident happening from 2000 to 2007.

Treatment of anterior crossbite of severe crowd in maxilla with non-extraction during growth spurt of puberty;

By distinguishing the high density and crowd,this paper argues that it should be careful to use high-den.

Change in the Contents of Lipid Peroxide,and Activity of Antioxidant Enzymes in the Liver of Mice under Crowding Stress;

From the point of view of trend toll control, study on transfer of highway network crowding degree, analyse the effect of trend toll on highway network crowding degree, and a function considering the toll influences is presented,thus a new method to solve the problem of highway network crowding is put forward.

By combining fitness sharing method and crowding method in selection stage and replacement stage of genetic algorithms respectively, a fitness sharing crowding genetic algorithms is proposed.

Research on fuzzy evaluation method and solutions for traffic congestion in urban road sections;

Analysis on Congestion in Cities and Road Pricing;

Theory connotation of the congestion of production factors;