Strong-loop, weak-loop, jump and invisible tasks are ubiquitous between tasks in the business process, and mining them from the event logs is a problem to be solved.

In recent years "invisible gold" occurring in sulfide minerals of the Carlin disseminated type gold deposits has attracted wide attention.

The advance in research on the occurrence of invisible gold is reviewed, including gold occurrence in the Carlin-type gold deposits, some other types of mesothermal gold deposits and associated gold in some base metal massive sulfide deposits, and experiments on the synthesis of gold-bearing minerals and adsorption of gold onto minerals.

The experimental results show that not only does this algorithm make the watermark invisible, but the imbeded watermark also has the strong robust upon the geometry distortion in the spa.

Method of Reconciling Automatically Robustness and Imperceptibility of Embedded Watermarking In wavelet Transform Domain

The blind detection is used,and the algorithm can achieve a good imperceptibility.

This paper proposes a new image watermarking scheme in order to solve the contradiction between imperceptibility and robustness.

Based on a pre-demarcation bombing principle, this paper briefly deals with a bombing principle for targets in invisible area.