The regional evaluation of monitoring stations for water resources can be of great importance due to its role in finding appropriate locations for stations, the maximum gathering of useful information and preventing the accumulation of unnecessary information and ultimately reducing the cost of data collection. Based on the theory of discrete entropy, this study analyzes the density of rain gag...

Many applications require data base systems with the capability to manage large amounts of data and to answer complex queries, especially those with several attributes, such as range queries and more particularly, spatial and temporal queries. Consequently, new access methods, with good performance for these types of operations associated with medium-high dimensionality, are needed. From this p...

The Simpliied Adaptive Resonance Theory (SART) class of networks is proposed to handle problems encountered in Adaptive Resonance Theory 1 (ART 1)-based algorithms when detection of binary and analog patterns is performed. The basic idea of SART is to substitute ART 1-based \unidirectional" (asymmetric) activation and match functions with \bidirectional" (symmetric) function pairs. This substit...

We propose a single-index diiusion model in this paper. This model can avoid thècurse of dimensionality' in estimating a multivariate nonparametric conditional variance. We adopt an absolute deviation estimation method to estimate the model. Comparing with the commonly used estimators, the absolute deviation estimator is more stable and ef-cient. Some simulations and applications to real data a...