1,563 research outputs found
Clustering stock market companies via chaotic map synchronization
A pairwise clustering approach is applied to the analysis of the Dow Jones
index companies, in order to identify similar temporal behavior of the traded
stock prices. To this end, the chaotic map clustering algorithm is used, where
a map is associated to each company and the correlation coefficients of the
financial time series are associated to the coupling strengths between maps.
The simulation of a chaotic map dynamics gives rise to a natural partition of
the data, as companies belonging to the same industrial branch are often
grouped together. The identification of clusters of companies of a given stock
market index can be exploited in the portfolio optimization strategies.Comment: 12 pages, 3 figure
Hausdorff clustering of financial time series
A clustering procedure, based on the Hausdorff distance, is introduced and
tested on the financial time series of the Dow Jones Industrial Average (DJIA)
index.Comment: 9 pages, 3 figure
Universality of three-body systems in 2D: parametrization of the bound states energies
Universal properties of mass-imbalanced three-body systems in 2D are studied
using zero-range interactions in momentum space. The dependence of the
three-particle binding energy on the parameters (masses and two-body energies)
is highly non-trivial even in the simplest case of two identical particles and
a distinct one. This dependence is parametrized for ground and excited states
in terms of {\itshape supercircles} functions in the most general case of three
distinguishable particles.Comment: 3 pages, 1 figure, published versio
Complex network modelling of origin–destination commuting flows for the COVID-19 epidemic spread analysis in Italian Lombardy Region
Currently the whole world is affected by the COVID-19 disease. Italy was the first country to be seriously affected in Europe, where the first COVID-19 outbreak was localized in the Lombardy region. The further spreading of the cases led to the lockdown of the most affected regions in northern Italy and then the entire country. In this work we investigated an epidemic spread scenario in the Lombardy region by using the origin–destination matrix with information about the commuting flows among 1450 urban areas within the region. We performed a large-scale simulation-based modeling of the epidemic spread over the networks related to three main motivations, i.e., work, study and occasional transfers to quantify the potential contribution of each category of travellers to the spread of the epidemic process. Our findings outline that the three networks are characterised by different weight dynamic growth rates and that the network “work” has a critical role in the diffusion phenomenon showing the greatest contribution to the epidemic spread
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