Evolution of Word-updating Dynamical Systems (WDS) on Directed Graphs

This paper continues the research on theoretical foundations for computer simulation.We introduce the concept of word-updating dynamical systems(WDS)on directed graphs,which is a kind of generalization of sequential dynamical systems(SDS)on graphs.Some properties on WDS,especially some results on NOR-WDS,which are different from that on NOR-SDS,are obtained.

生物炭固定黄假单胞菌剂SBR降解污染物动力学

利用水稻秸秆生物炭为载体,将黄假单胞菌(Pseudomonas flava WD-3)剂进行固定化,并应用到序批式活性污泥法(SBR)系统,研究系统其优化运行参数、去除效率和降解污染物动力学。结果表明,优化的生物炭固定化黄假单胞菌剂投加量和HRT分别为42 mg/L和3 d,在此条件下,生物炭固定化黄假单胞菌剂对SBR系统废水中TN、NH_4^+-N、TP和COD的去除率较游离菌时有显著的提高,分别为游离菌的1.39、1.51、1.47、1.28倍,且净化效果稳定。SBR系统中生物降解过程符合1级反应动力学模型,生物炭固定化黄假单胞菌剂的投加量、HRT与污染物的去除率呈正相关的1级反应关系。