The availability of wildland fire propagation models with parameters estimated in an accurate way starting from measurements fronts is crucial to predict the evolution and allocate resources for firefighting. Thus, we propose approach estimate a model combining empirical rate spread level set methods describe front over time space. estimation affecting performed by using shapes measured at diff...

In this paper, two different propagation models based on different topologies of email network are proposed. By analyzing the means and the characters of email virus spreading, the function of email virus propagation is given, and the maximum time of email virus propagation before the anti-virus software is calculated. The condition in which email virus propagation stops is also proved. The rel...