This paper presents a novel method of stroke fragmentation, which combines geometric features and HMM(hidden Markov model).

The otherness of fatality rate in every calculated unit interior and between the units applying different mining technologies are analyzed, a dualistic analysis calculation model is established to calculate fatality rate per million man hour and per million tons adopting different mining methods like mechanized and non mechanized mining methods or the like.

Improvement of pixel unmixing technique of multi-spectral remote sensing in urban area;

Linear pixel unmixing is a straightforward and efficient approach to spectral decomposition of remotely sensed data.

Tetrahedral mesh optimization method combining sliver decomposition and Laplacian smoothing;