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| 2008, Vol. 15(1): 50-53 DOI: | ||
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| WANG Li1, ZHOU Xin-Dong2 | ||
| 1. Department of Computer and Electronic Engineering, Hunan Business College, Changsha 410205, China; 2. Changsha Research Institute of Mining and Metallurgy, Changsha 410012, China | ||
| Received null Revised null | ||
| Supporting info | ||
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