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—The theory of fuzzy sets has been recognized as a suitable tool to model several kinds of patterns that can hold in data. In this paper, we are concerned with the development of a general model to discover association rules among items in a (crisp) set of fuzzy transactions. This general model can be particularized in several ways; each particular instance(More)
Quanti®ed statements are used in the resolution of a great variety of problems. Several methods have been proposed to evaluate statements of types I and II. The objective of this paper is to study these methods, by comparing and generalizing them. In order to do so, we propose a set of properties that must be ful®lled by any method of evaluation of(More)
Fuzzy numbers, and more generally linguistic values, are approximate assessments, given by experts and accepted by decision-makers when obtaining more accurate values is impossible or unnecessary. To simplify the task of representing and handling fuzzy numbers, several authors have introduced real indices in order to capture the information contained in a(More)
OBJECTIVE The description of three cases of reflex sympathetic dystrophy. DESIGN Retrospective clinical observations. SETTING Gòtic basic Health Area, Barcelona. PATIENTS AND OTHER PARTICIPANTS Two women and a man (aged 75, 65 and 56) with mechanical pain and inflammation in the extremities. Two of the cases had a case history of trauma. Radiological(More)