摘要：AbstractThis article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).This article has been retracted at the request of the Editor.The authors have plagiarized a paper that had already appeared in the Proceedings of the5th International Technology, Education and Development Conference(INTED2011), pp. 970–976.http://library.iated.org/view/LOPES2011TEA. One of the conditions of submission of a paper for publication is that authors declare explicitly that their work is original and has not appeared in a publication elsewhere. Re-use of any data should be appropriately cited. As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the publication that this was not detected during the ×submission process.
