this paper might be of interest to some of you,
http://arxiv.org/ftp/physics/papers/0703/0703223.pdf
your comments are welcome.
Cheers.
Bin
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Bin Jiang
Department of Land Surveying and Geo-informatics
The Hong Kong Polytechnic University
Hung Hom, Kowloon, Hong Kong.
Tel: (852) 2766 4335, Fax: (852) 2330 2994
Email: [log in to unmask]
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