Modern Portfolio Theory in Information Science
With the advancement of new technologies and information technologies, the volume of resources published on the web and databases is increasing daily. The web network has become one of the most important sources for accessing information. Therefore, retrieving information related to the user’s needs is of great importance. such a way that the purpose of databases and search engines is to provide the right information to the right users at the right time, however, identifying useful sites and information sources is very difficult for users.
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