effective stress parameter(s)

例句：

1. 1.The engineer used the effective stress parameter to optimize the design of the bridge.
   工程师利用有效应力参数优化了桥梁的设计。
2. 2. The study found that the effective stress parameter had a significant impact on the performance of the material.
   研究发现，有效应力参数对材料的性能有显著影响。
3. 3. The researcher proposed a new method to calculate the effective stress parameter based on experimental data.
   研究者提出了一种新的方法，基于实验数据计算有效应力参数。