In order to explore the change of pseudo-density to the effect of material rigidity and set up the relation between them for density variable method, we presented FEM to deal with the problem.

为了探讨变密度法中伪密度的变化对材料刚度的影响，并建立两者之间的力学关系，本文采用有限元法研究这一问题。

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The amount of force needed is inversely proportional to the rigidity of the material.

需要的力度与材料的硬度成反比。

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The rigidity of the reinforced material influences the failure mode of the reinforced earth wall, so it also affects the design method.

加筋材料的刚度影响着加筋土挡墙的破坏形式，从而也就影响着其设计方法。

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Mr Mahdavi says his technique could control the size and positioning of the bubbles in such foam, and so determine the material's strength and rigidity.

ECONOMIST: MONITOR