Nowadays, big data is coming to the force in a lot of applications. Processing skyline query on more than linear time by far too expensive and often even may be slow. It obviously not possible compute an exact solution sublinear time, since itself have size. Fortunately, many situations, fast approximate useful slower solution. This paper proposes two sampling-based algorithms for processing qu...

  P redicting the amount of country imports toward assessing trade balance and its effect on the balance of payments (BOP) and finally money supply, general level of prices and the rate of economic growth is of paramount importance. Therefore, economic policymakers seriously need a model which cannot only predict the volume of imports well but also be capable of re...