Numerical calculation show that the implicit gradient model can simulate commendably the speciality of damage for concrete,and its distributing of damage and carrying capacity is no sensitivity to mesh- diminished.

Based on the two problems associated with numerical simulation for concrete material zero consumption of energy and mesh dependence in the classical local damage model, the implicit gradient damage model is introduced.

In this paper,a moving objects segmentation algorithm based on gradient model in compressed domain is proposed.

4, and it fuses intensity gradient model and color histogram model to track human heads, and the method of calculating the similarity between the template and the image to be detected using the two models is also given.