Carlos Porcel

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In this paper, we present a procedure to estimate missing preference values when dealing with pairwise comparison and heterogeneous information. The procedure attempts to estimate the missing information in an expert's incomplete fuzzy preference relation using only the preference values provided by that particular expert. Our procedure to estimate missing(More)
An evaluation methodology based on fuzzy computing with words aimed at measuring the information quality of Web sites containing documents is presented. This methodology is qualitative and user oriented because it generates linguistic recommendations on the information quality of the content-based Web sites based on users’ perceptions. It is composed of two(More)
As in the Web, the growing of information is the main problem of the academic digital libraries. Thus, similar tools could be applied in university digital libraries to facilitate the information access by the students and teachers. In [46] we presented a fuzzy linguistic recommender system to advice research resources in university digital libraries. The(More)
0020-0255/$ see front matter 2011 Elsevier Inc doi:10.1016/j.ins.2011.08.026 ⇑ Corresponding authors. E-mail addresses: (C. Porcel) (E. Herrera-Viedma). Recommender systems could be used to help users in their access processes to relevant information. Hybrid recommender systems represent a promising solution for multiple(More)
Information Retrieval Systems (IRSs) based on an ordinal fuzzy linguistic approach present some problems of loss of information and lack of precision when working with discrete linguistic expression domains or when applying approximation operations in the symbolic aggregation methods. In this paper, we present a new IRS model based on the 2-tuple fuzzy(More)
0957-4174/$ see front matter 2009 Elsevier Ltd. A doi:10.1016/j.eswa.2009.04.038 * Corresponding author. E-mail addresses: (C. Porcel), jmm (E. Herrera-Viedma). The Web is one of the most important information media and it is influencing in the development of other media, as for example, newspapers, journals, books, and(More)
Nowadays, the patients and physicians use the health-related websites as an important information source and, therefore, it is critical the quality evaluation of healthrelated websites. The quality assessment of health-related websites becomes especially relevant because their use imply the existence of a wide range of threats which can affect people’s(More)
0957-4174/$ see front matter 2008 Elsevier Ltd. A doi:10.1016/j.eswa.2008.06.038 * Corresponding author. E-mail addresses: (C. Porcel), vied Viedma). Nowadays, the increasing popularity of Internet has led to an abundant amount of information created and delivered over electronic media. It causes the information access by the users is a(More)
Recommender systems evaluate and filter the great amount of information available on the Web, so they could be used in an academic environment to help users in their searches of relevant information. In the literature, a lot of approaches for generating personalized recommendations of information items in such environment can be found. Usually, these(More)
Information retrieval is an activity that implies to achieve documents that better fulfil the user information needs. For achieving this activity an Information Retrieval System uses matching functions which specify the degree of relevance of a document with respect to a user query. Assuming linguistic weighted queries we present a new linguistic matching(More)