With the development of the web, large numbers of documents are available on the Internet. Digital libraries, news sources and inner data of companies surge more and more. Automatic text categorization becomes more and more important for dealing with massive data. However the major problem of text categorization is the high dimensionality of the feature space. At present there are many methods ...

equitable distribution of health system resources has been a serious challenge for long ago among the health policy makers. conducted studies have mostly ever had emphasis on equality rather than equity. in this paper we have attempted to examine both equality and equity in resources distribution.this is an applied and descriptive study in which we plotted lorenz and concentration curves to des...

In text classification, the purity of the Gini index can be used. When purity value is greater, the characteristic of the information contained in the attribute is higher, and the feature distinguishing capability is stronger. But using the Gini purity formula on feature weight, the classification result is not very good, one of the main reasons is those rare words only appearing in one categor...

Gini index is a widely used measure of economic inequality. This article develops a theory and methodology for constructing a confidence interval for Gini index with a specified confidence coefficient and a specified width without assuming any specific distribution of the data. Fixed sample size methods cannot simultaneously achieve both specified confidence coefficient and fixed width. We deve...

This study analyzed the spatial distribution of dengue in Rio de Janeiro, Brazil, in 2006, and associations between the incidence per 100,000 inhabitants and socio-environmental variables. The study analyzed reported dengue cases among the city's inhabitants, rainfall, Breteau index (for Aedes aegypti and Aedes albopictus), Gini index, and social development index. We conducted mapping and used...

The Gini index is one of the most used indicators of social and economic inequality. In this paper we characterize the Gini index as the unique function that satis…es the properties of scale independence, symmetry, standardization and separability. Furthermore, we propose a simpler way to compute it. Keywords: Gini index; income inequality; axiomatization. JEL Classi…cation: D31, D63, I31. 1 In...

As a fundraising method, Initial Coin Offering (ICO) has raised billions of dollars for thousands startups. Existing ICO mechanisms place more emphasis on the short-term benefits maximal while ignoring problem unbalanced token allocation, which negatively impacts subsequent and bad effects introducing new investors resources. We propose mechanism uses concept Gini index very first time as desig...

This paper proposes and proves the important equivalence between the Gini index and the area under the Kolmogorov-Smirnov (KS) distribution curve. The proof’s rationale is similar to that used in the proof of equivalence between AUC_ROC and AUC_KS. But different from that, this one uses a transformation that preserves the 1-to-1 correspondence between the ideal classifier on the KS and Lorenz c...

The Gini index is a measure of the inequality of a distribution that can be derived from Lorenz curves. While commonly used in, e.g., economic research, it suffers from ambiguity via lack of Lorenz dominance preservation. Here, investigation of large sets of empirical distributions of incomes of the World's countries over several years indicated firstly, that the Gini indices are centered on a ...