1)  Scattering model

1.
A bistatic scattering model is presented based on perturbation theory and empirical formula in this paper, and the relations between the bistatic scattering strength and the frequency, the wind speed, the sound speed, the angles(the grazing angle, the scattering angle and the bistatic angle) are analyzed by means of computer simulatio.

2.
The model is applied to shallow water with a reverse thermocline and the curves of reverberation loss calculated by the model are compared when applying four different bottom scattering models.

3.
In order to study bistatic ocean reverberation,three bistatic scattering models are developed.

2)  Discretely scattering model

3)  GTD scattering model
GTD散射模型
1.
Firstly,the range parameter of scattering centers is obtained by matrix-pencil method,and the type parameter of scattering centers is estimated based on approximation of GTD scattering model,and then the amplitude parameter of scattering centers can be estimated by least-squares method.

4)  scattering model

1.
Review the ultrasonic scattering model for inhomogeneous soft tissue;

5)  scattering point model

1.
According to the principle of the radar imaging,it is discussed the relations of the scattering points between the length direction’s displacements and the phase separation based on the scattering point model.

6)  scatter model

1.
Based on analyzing the principle of the multipath effect of the approaching landing system,a simulation method of the multipath effect was proposed by the scatter model-database design and ray tracing theory.

 弹性散射和非弹性散射elastic scattering and inelastic scattering    使用粒子间碰撞来研究粒子的性质、相互作用和内部结构的两种情况。如果碰撞过程中两粒子间只有动能的交换，粒子类型、其内部运动状态和数目并无变化，则称为弹性散射或弹性碰撞。如果碰撞过程中除了有动能交换外，粒子的数目、类型和内部状态有所改变或转化为其他粒子，则称为非弹性散射或非弹性碰撞。   散射过程的研究对于了解许多物理现象具有很重要的意义。例如E.卢瑟福对a粒子被物质散射的研究，提出原子的有核模型；J.弗兰克和G.L.赫兹的电子与原子碰撞实验证实了N.玻尔的定态假设；建造高能加速器就是利用被加速粒子的散射过程来研究粒子的性质、相互作用和相互转化的规律。60年代末到70年代初利用高能轻子对质子和中子的深度非弹性散射的实验，发现质子和中子内部存在点状结构。