Fasa University

Evaluation of a robust and asymmetric class of nonlinear regression models under censoring

Abstract Censored nonlinear regression models are often based on Gaussian errors for analytical convenience. However, real data—such as income levels, HIV viral loads, or agricultural yields—often exhibit asymmetry, heavy tails, outliers, and censored observations, making classic...

Integrated Hydrogeochemical Characterization, Drinking Water Quality Assessment, and Spatial Analysis of Groundwater Using GIS and Multivariate Statistics: A Case Study of Fars Province, Iran

Groundwater quality in semi-arid regions is influenced by interacting geological, climatic, and human factors. This study integrated hydrochemical analysis, ionic relationships, multivariate statistics, Water Quality Index (WQI), and GIS-based spatial analysis to evaluate groundw...