With the fast growth of computer documents and the expanding internet access to ideas, articles, and other technical documents are much easier and more convenient.. This resulted in the rapid exchange of the information, and a vast growth of plagiarism. .Since in universities and other educational establishments, scientific resources are more easily accessible to users, therefore plagiarism is in use by some users. Based on the importance of this issue and the copy right law to protect the individuals, writers and scholar from the fraud use of other people research results, a lot of research has been done on the subject of plagiarism, in recent years. As a result, the researchers have found ways to detect plagiarism in texts such as dissertations, papers and other scientific reports. And these efforts have directed the researchers to increase the accuracy and efficiency of these methods. There are two important and controversial issues in the detection of plagiarism. The first issue is the number of texts that are compared. The number of texts are sometimes very high which could be more than a few thousand text to be compared. Therefore, the first step is to find texts that are more likely to be suspicious text. One way of reducing the number of comparisons, is to justify; TEXT-INDENT: 14.2pt; MARGIN: 0cm 0cm 0pt; mso-line-height-alt: .7pt; tab-stops: 10.0cm 18.0cm" In this thesis, a two-phase approach, is used which consists of several steps in order to detect plagiarism. In the first phase, a neural network justify; TEXT-INDENT: 14.2pt; MARGIN: 0cm 0cm 0pt; mso-line-height-alt: .7pt; tab-stops: 10.0cm 18.0cm" In this research the method proposed to detect fraud and fraud in the context of their verbatim or with low ambiguity is presented. To compare this work to related research ,the work is carried out in two phases. In the first phase, proposed justify; MARGIN: 0cm 0cm 0pt; mso-line-height-alt: .7pt; tab-stops: 10.0cm 18.0cm" Keywords justify; TEXT-INDENT: 14.2pt; MARGIN: 0cm 0cm 0pt; mso-line-height-alt: .9pt; mso-layout-grid-align: none"
