髓核内的应力和位移变化相对较小。
The intra- stress and displacement of nucleus wascomparatively lesser.
结果：髓核摘除后椎间盘的高度和刚度降低，应变和位移加大；
Results: After nucleotomy, the height and strength of the disc were reduced and the stress and displacement were increased.
研究如何应用位移秩的方法有效地求出一个给定的结构矩阵的核空间中的一个非零元素。
The main problem considered in this paper is how to find efficiently a nonzero element in the kernel of a given structured matrix by the displacement approach.
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