000048138 001__ 48138 000048138 005__ 20210121114517.0 000048138 0247_ $$2doi$$a10.1103/PhysRevE.92.012811 000048138 0248_ $$2sideral$$a93481 000048138 037__ $$aART-2015-93481 000048138 041__ $$aeng 000048138 100__ $$0(orcid)0000-0001-6859-099X$$aFiasconaro, A.$$uUniversidad de Zaragoza 000048138 245__ $$aHybrid recommendation methods in complex networks 000048138 260__ $$c2015 000048138 5060_ $$aAccess copy available to the general public$$fUnrestricted 000048138 5203_ $$aWe propose two recommendation methods, based on the appropriate normalization of already existing similarity measures, and on the convex combination of the recommendation scores derived from similarity between users and between objects. We validate the proposed measures on three data sets, and we compare the performance of our methods to other recommendation systems recently proposed in the literature. We show that the proposed similarity measures allow us to attain an improvement of performances of up to 20% with respect to existing nonparametric methods, and that the accuracy of a recommendation can vary widely from one specific bipartite network to another, which suggests that a careful choice of the most suitable method is highly relevant for an effective recommendation on a given system. Finally, we study how an increasing presence of random links in the network affects the recommendation scores, finding that one of the two recommendation algorithms introduced here can systematically outperform the others in noisy data sets. 000048138 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/ 000048138 590__ $$a2.252$$b2015 000048138 591__ $$aPHYSICS, MATHEMATICAL$$b6 / 53 = 0.113$$c2015$$dQ1$$eT1 000048138 591__ $$aPHYSICS, FLUIDS & PLASMAS$$b10 / 30 = 0.333$$c2015$$dQ2$$eT2 000048138 592__ $$a1.183$$b2015 000048138 593__ $$aCondensed Matter Physics$$c2015$$dQ1 000048138 593__ $$aStatistical and Nonlinear Physics$$c2015$$dQ1 000048138 593__ $$aStatistics and Probability$$c2015$$dQ2 000048138 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000048138 700__ $$aTumminello, M. 000048138 700__ $$aNicosia, V. 000048138 700__ $$aLatora, V. 000048138 700__ $$aMantegna, R.N. 000048138 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada 000048138 773__ $$g92, 1 (2015), 012811 [10 p.]$$pPhys. rev., E$$tPhysical Review E$$x2470-0045 000048138 8564_ $$s548041$$uhttps://zaguan.unizar.es/record/48138/files/texto_completo.pdf$$yVersión publicada 000048138 8564_ $$s133838$$uhttps://zaguan.unizar.es/record/48138/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000048138 909CO $$ooai:zaguan.unizar.es:48138$$particulos$$pdriver 000048138 951__ $$a2021-01-21-11:00:23 000048138 980__ $$aARTICLE