1,720,963 research outputs found
Evaluation and ranking of intuitionistic fuzzy qualities
No full textWe deal with the problem of evaluating and ranking intuitionistic fuzzy quantitities (IFQs). We call IFQ an intuitionistic fuzzy set (IFS) described by a pair of fuzzy quantities, where a fuzzy quantity is defined as the union of two, or more, convex fuzzy sets that may be non-normal. We suggest an evaluation defined by a pair index based on "value" & "ambiguity" and a ranking method based on them. This new formulation contains as particular cases the ones proposed by Fortemps and Roubens [13], Yager and Filev [24, 25] and follows a completely different approach. © Springer International Publishing 2013
A New Proposal of Parametric Similarity Measures with Application in Decision Making
No full textWe introduce a general equality index for two fuzzy values, proposing a parametric family of similarity measures between two fuzzy vectors, and investigating the mathematical properties. Subsequently we construct a class of parametric similarity measures, showing how the proposed approach extends and generalizes previously proposed framework in the context of decision making problem. The proposed approach can support decision maker under complex situations. An application of the proposed method is also given
A Cluster Analysis Approach for Rule Base Reduction
No full textIn this paper we propose an iterative algorithm for fuzzy rule base simplification based on cluster analysis. The proposed approach uses a dissimilarity measure that allows to assign different importance to values and ambiguities of fuzzy terms in antecedent and consequent parts of fuzzy rules
Non-optimal exercise of perpetual American put options and expected loss return
No full textQuaderno del Dipartimento di Scienze Economiche e Matematico-Statistiche, Collana di Matematica, Università del Salento, vol. 133/2
Multi-criteria and medical diagnosis for application to health insurance systems: a general approach through non-additive measures
No full textIn this contribution, we propose a healthcare decision support system. Nowadays, it is commonly recognized that quantitative tools and decision support can increase the benefits and the performances of healthcare systems, and for this, different multiple criteria methods were proposed in many branches of medicine. The approach we propose is based on non-additive measures and the Choquet integral. This methodology has been intensively applied in many real-world applications, given its capability to represent interactions among criteria, and thus to model a wide range of preference structures. Considering that the diagnosis procedure needs also to take the clinical expertise into account, this method appears particularly tailored for a diagnosis support, mainly when statistical models cannot be applied and/or available data are scarce and knowledge can be inferred by physicians’ opinions. In particular, we propose a disease risk evaluation and compute some associated indicators. Furthermore, an error estimation is performed. As an application, a cardiovascular risk diagnosis model is presented. The proposed methodology, that allows to quantify the disease risk taking into account individual’s medical conditions, can be used for improving healthcare service quality or for pricing and reserving health insurance policies. An application to health insurance pricing is provided
Una analisi stocastica delle presenze turistiche nel Salento
No full textQuesto volume è l'omaggio, da parte di amici e colleghi, alla memoria di Michela Specchiarello, Professore Ordinario di Scienze Merceologiche presso il Dipartimento di Scienze dell'Economia dell'Università del Salento, prematuramente scomparsa il 22 dicembre 2010. Il tema dell'opera, lo Sviluppo Sostenibile, si prospetta nelle economie moderne come un obiettivo condiviso ed eticamente imprescindibile per ogni cittadino che voglia promuovere consapevolmente, nel territorio in cui vive, la crescita economica assieme al progresso sociale, mediante il miglioramento diffuso della qualità della vita. Un tale risultato è ottenuto salvaguardando l'ambiente, facendo un uso razionale delle risorse, favorendo l'innovazione e assicurando la qualità su cui si fonda la soddisfazione dei diversi portatori d'interesse. Non a caso, Ambiente, Risorse, Innovazione e Qualità costituiscono le quattro Sezioni in cui si articola il presente volume, che ripercorre le tracce dei lavori di Michela Specchiarello, sinteticamente riassunti all'inizio di ciascuna. Alla luce della sua articolata struttura multidisciplinare, questo libro - scritto con l'apporto di tutti i docenti del Dipartimento si Scienze Economiche dell'Università del Salento - fornisce un quadro variegato degli aspetti quantitativi e qualitativi connessi al concetto di sviluppo, che possono essere d'ausilio tanto agli studiosi di scienze economiche e manageriali, quanto a coloro che vogliano guardare lontano, secondo uno sforzo produttivo di cross-fertilization, desiderosi di ricevere spunti di riflessione e stimoli scientifici per successivi approfondimenti
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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