Search results for " trees"
showing 4 items of 214 documents
La influencia del estado del partido en la posesión del balón en el fútbol femenino de alto rendimiento
2020
[Abstract] The objective of this study was to examine the effect of the situational match status variable on the ball possession of the teams that participated in the 2015 FIFA Women’s World Cup. The 52 games played during the championship have been collected, and 3,740 ball possessions made by the teams were analyzed. The teams have been divided into successful and unsuccessful. Three types of analysis have been carried out: a univariate analysis for both groups with the categorical and continuous variables selected; a bivariate analysis, using chi-square tests and the exact Fischer test; and finally, a multivariable technique such as the decision trees was incorporated. The available resu…
Intelligent solutions for real-life data-driven applications
2017
The subject of this thesis belongs to the topic of machine learning or, specifically, to the development of advanced methods for regression analysis, clustering, and anomaly detection. Industry is constantly seeking improved production practices and minimized production time and costs. In connection to this, several industrial case studies are presented in which mathematical models for predicting paper quality were proposed. The most important variables for the prediction models are selected based on information-theoretic measures and regression trees approach. The rest of the original papers are devoted to unsupervised machine learning. The main focus is developing advanced spectral cluster…
Weighted and unweighted distances based decision tree for ranking data
2018
Preference data represent a particular type of ranking data (widely used in sports, web search, social sciences), where a group of people gives their preferences over a set of alternatives. Within this framework, distance-based decision trees represent a non-parametric tool for identifying the profiles of subjects giving a similar ranking. This paper aims at detecting, in the framework of (complete and incomplete) ranking data, the impact of the differently structured weighted distances for building decision trees. The traditional metrics between rankings don’t take into account the importance of swapping elements similar among them (element weights) or elements belonging to the top (or to …
Quando Gilgameš taglia i “cedri”. Gli alberi nell’immaginario mitologico mesopotamico
2021
In the Sumerian and Akkadian mythological literature, the ruler of the city of Uruk, Gilgameš, uproots and/or cuts down trees on several occasions: the ḫalub-tree (mahaleb cherry) linked to the goddess Inanna and the eren (juniper)/erēnu (cedar) trees of the Forest guarded by Ḫuwawa. These trees should be understood as elements of a wider "wilderness", with which they share a powerful and ambiguous ontological otherness, as opposed to the city and the country of Sumer. In order to become useful, this otherness must be conducted in the city and subject to processes of organization. This article illustrates the symbolic implications of the uprooting, cutting down and subsequent transport of t…