12 research outputs found
Performance of various training algorithms on scene illumination classification
The increasing number of training algorithms along with their convincing results will make this question that which algorithm will be more efficient. This study aims to perform some widespread tests on some well-known training algorithms (Levenberg-Marquardt, Resilient back propagation and Scaled conjugate gradient) to evaluate their performance for scene illumination classification. The results presented by this research can provide a reliable guide line for choosing the most appropriate training algorithm depends on the problem specification. The results of this study select the LM training method with the accuracy of 94.41% as the most accurate and RP as the most quick method with response time of 0.426 s
Kinetic analysis of enhanced biological phosphorus removal in a hybrid integrated fixed film activated sludge process
Hybrid integrated fixed film activated sludge is a promising process
for the enhancement of nitrification, denitrification and phosphorus
removal in conventional activated sludge systems that can be used for
upgrading biological nutrient removal, particularly when they have
space limitations or need modifications that will require large
monetary expenses. In this research, successful implementation of
hybrid integrated fixed film activated sludge process at temperate zone
wastewater treatment facilities has been studied by the placement of
fixed film media into aerobic, anaerobic and anoxic zones. The primary
objective of this study was to investigate the incorporation of
enhanced biological phosphorus removal into hybrid integrated fixed
film activated sludge systems and study the interactions between the
fixed biomass and the mixed liquor suspended solids with respect to
substrate competition and nutrient removal efficiencies. A pilot-scale
anaerobic-anoxic-oxic configuration system was used. The system was
operated at different mean cell residence times and influent chemical
oxygen demand/total phosphorus ratios and with split influent flows.
The experimental results confirmed that enhanced biological phosphorus
removal could be incorporated successfully into hybrid integrated fixed
film activated sludge system, but the redistribution of biomass
resulting from the integration of fixed film media and the competition
of organic substrate between enhanced biological phosphorus removal and
denitrification would affect performances. Also, kinetic analysis of
the reactor with regarding to phosphorus removal has been studied with
different kinetic models and consequently the modified Stover-Kincannon
kinetic model has been chosen for modeling studies and experimental
data analysis of the hybrid integrated fixed film activated sludge
reactor