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Phosphorus fractions and phosphorus adsorption characteristics of Xuanwu Lake sediments were analyzed. In this study, according to the Standards, Measurements and Testing (SMT) protocol, the sediment phosphorus is fractionated into Cone. HCl-P, NaOH-P, HCl-P, organic P (OP), inorganic P (IP). The results show that the Cone. HCl-P content in the sediments ranges from 567.89 to 1196.89 mg kg-1. The...
A hybrid artificial neural network model combining particle swarm optimization (PSO) and back propagation (BP) was used for ice breakup date forecast in the top reach of the Yellow River, China. A comparison of PSO-BP model to other statistical models was also conducted to evaluate the performance of the PSO-BP model. The forecast results indicate a satisfactory performance in the ice breakup date...
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