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A hierarchical multi-criteria sorting approach for recommender systems

机译：推荐系统的分层多标准排序方法

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摘要

Classification problems refer to the assignment of alternatives to predefined categories. In this work we focus on ordered classification, called sorting, in which the predefined categories indicate several degrees of interest or suitability of alternatives for a certain user. The assignment of alternatives is based on multiple conflicting criteria. This multi-criteria sorting approach is specially interesting for recommender systems aimed at finding the most suitable alternatives for each user. First, we study the ELECTRE-TRI-B sorting method, which follows the outranking approach based on comparing the evaluations of alternatives with the profile limits separating the categories. The complexity of some recommenders systems requires the extension of the classical ELECTRE-TRI-B method to manage a taxonomical organization of the set of criteria. In this paper we consider a set of criteria in the form of a hierarchy. The intermediate criteria in such a hierarchy correspond to different aspects of the recommendation procedure, such as content, context or cost. At each of these criteria, a sorting problem must be solved. Therefore, we propose extending ELECTRE-TRI-B to handle assignments of alternatives on several levels of the hierarchy. A hierarchical procedure for sorting is proposed, called ELECTRE-TRI-B-H. Secondly, the paper explains the integration of ELECTRE-TRI-B-H into a recommender system of touristic activities related to wine, called GoEno-Tur. This system is developed for the region of Tarragona, Catalonia (Spain), which is a well-recognized area of wine and cava production.
机译：分类问题是指将替代方案分配给预定义的类别。在这项工作中，我们集中于有序的分类（称为排序），其中预定义的类别指示特定用户的兴趣程度或替代方案的适用性。替代方案的分配基于多个相互冲突的标准。对于希望为每个用户找到最合适的替代方案的推荐系统，这种多标准分类方法特别有趣。首先，我们研究ELECTRE-TRI-B排序方法，该方法遵循基于将替代方案的评估与分隔类别的配置文件限制进行比较的排序方法。某些推荐系统的复杂性要求扩展经典的ELECTRE-TRI-B方法来管理一组标准的分类组织。在本文中，我们考虑了层次结构形式的一组标准。这种层次结构中的中间标准对应于推荐过程的不同方面，例如内容，上下文或成本。在这些标准中的每一个上，必须解决分类问题。因此，我们建议扩展ELECTRE-TRI-B以处理层次结构几个级别上的替代项分配。提出了用于分类的分级过程，称为ELECTRE-TRI-B-H。其次，本文解释了将ELECTRE-TRI-B-H集成到与葡萄酒有关的旅游活动推荐系统GoEno-Tur中。该系统是为加泰罗尼亚（西班牙）塔拉戈纳地区开发的，该地区是公认的葡萄酒和卡瓦酒生产地区。

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