Biphotons, generated from a hot atomic vapor via the process of spontaneous four-wave mixing (SFWM), have following merits: Stable and tunable frequencies as well linewidth. Such merits are very useful in application long-distance quantum communication. However, hot-atom SFWM biphoton sources previously had far lower values generation rate per linewidth, i.e., spectral brightness, compared with...

in this study, a hybrid intelligent model has been designed to predict groundwater inflow to a mine pit during its advance. novel hybrid method coupling artificial neural network (ann) with genetic algorithm (ga) called ann-ga, was utilised. ratios of pit depth to aquifer thickness, pit bottom radius to its top radius, inverse of pit advance time and the hydraulic head (hh) in the observation w...