impacted fracture

Temperature impacted on the fracture stress and elastic modulus of the material obviously. Elevated temperature will lead to low fracture stress and smaller elastic modulus.

温度对断裂应力和弹性模量的影响也比较明显，高温会导致低的断裂应力和小的弹性模量。

Conclusion Fixation of distal femoral fractures with a retrograde intramedullary screwing nail is new effecting methods, with simply the operation and fastness fixation, little impacted on fracture.

结论股骨旋入针逆行穿针固定治疗股骨下段骨折，手术操作简单，固定牢固，对骨折端的血运影响小，是一种新的有效的治疗方法。

The main work of the thesis and achievement are summed up as follows: ( 1) Research on meso-structure of fractured porous media, the mathematical model of fractured porous media is established and the four main factors were found which impacted fracture porous media fluid flow.

论文主要工作和成果归纳如下：（1）通过对裂隙-孔隙介质细观结构的研究，找出了影响裂隙-孔隙介质内流体流动的四个主要因素，建立了裂隙-孔隙介质研究的数学模型。