而且，局部P加密的区域也集中在应力奇异的部位。
The local P-version adaptive zone is upgraded concentrate in stress-singularity zone.
图像是否受到篡改，并检测出图像受到篡改的部位。最后论文分析了当前在混沌加密与图像水印研究中存在的问题，并指出了进一步的研究方向。
Finally, the thesis is concluded by pointing out some open issues on the research of chaos based encryption and image watermarking as well as highlight some further research directions.
合成平均速度点的疏密主要由作图比例尺而定，在构造复杂的部位应适当地加密，以便控制速度的横向变化。
The velocity points at the part where geological structure is complicated should be appropriately densified in order to picture the lateral variation of velocity.
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