abstract precipitation as the most important factor plays the main role in many application researches which are based on climatic parameters. many researches in the field of hydrology, hydrometeorology and agriculture employs rain-gauges (such as synoptic and climatologic stations) data. precipitation characteristics, such as rainfall intensity and duration, usually exhibit significant spatial...

For data satisfying certain generalized convexity conditions, the existence and uniqueness of a piecewise quadratic curvature continuous parametric spline interpolant in IR 2 is proved. Convexity is preserved by the interpolation, and the numerical construction of the interpolant can be carried out eeciently. The interpolation is 4{th order accurate, and a number of examples shows both the appl...

In a recent paper, Y. Xu proposed a set of Chebyshev-like points for polynomial interpolation on the square [−1, 1]. We have recently proved that the Lebesgue constant of these points grows like log of the degree (as with the best known points for the square), and we have implemented an accurate version of their Lagrange interpolation formula at linear cost. Here we construct non-polynomial Xu-...

Nowadays, the rapid growth of technology delivers many new concepts and notations that aim to increase efficiency comfort human life. One these techniques is Internet Things (IoT). The IoT has been used achieve efficient operation management, cost-effective operations, better business opportunities, etc. However, there are challenges facing implementing an smart environment. most critical chall...