The growth rate of different economies in Europe depends strongly on the production and, especially, on the consumption of energy resources. As an empirical rule, the development of such economies is closely interrelated with a consistent CO2 emission into atmosphere. However, this aspect has a...

In a previous study, (Stefanescu, P., Stefanescu, St., 2006) we suggested two possible estimators for the unknown value of the parameter q which characterize a homographic type HG(q) distribution. In the current paper we shall prove that the proposed estimators of q based on the median of the...

The paper emphasizes the specific manner to perform the arithmetic operations in the computer as always it is possible to have "rounding errors". Neglecting the influence of the computer rounding errors could affect a right conclusion, for example, in the case of an account balance verification.

The iterative deterministic optimization method could not more find multiple global minima of a given objective function ( [6] ). Generally, the probabilistic optimization algorithms have not this restrictive behaviour, to determine only a single global minimum point. In this context we’ll...

We develop Dobrescu’s ideas (2011, 2013) to discover the main characteristics of an economic or social system. Many classifications of models, based on different dissimilarity measures, were taken into consideration. Also a practical example, which analyzes the relations among some indicators...