We prove that, for any given vertexν* in a series-parallel graph G, its edge set can be partitioned into k= min{k′(G) + 1,δ(G)} subsets such that each subset covers all the vertices of G possibly except forν*, wh...We prove that, for any given vertexν* in a series-parallel graph G, its edge set can be partitioned into k= min{k′(G) + 1,δ(G)} subsets such that each subset covers all the vertices of G possibly except forν*, whereδ(G) is the minimum degree of G and k′(G) is the edge-connectivity of G. In addition, we show that the results in this paper are best possible and a polynomial time algorithm can be obtained for actually finding such a partition by our proof.展开更多
为研究湿法氧化脱除烟气中NO的效果,采用实验测试和理论计算相结合的方法,选取了H_2O_2、NaClO_2和KMnO_43种氧化剂,在鼓泡反应装置中,测试氧化剂的氧化温度和浓度对脱硝效果的影响,确定了最优脱硝条件,在最优条件下分别进行了并联及串...为研究湿法氧化脱除烟气中NO的效果,采用实验测试和理论计算相结合的方法,选取了H_2O_2、NaClO_2和KMnO_43种氧化剂,在鼓泡反应装置中,测试氧化剂的氧化温度和浓度对脱硝效果的影响,确定了最优脱硝条件,在最优条件下分别进行了并联及串联的脱硝实验。结果表明,在30℃,1 000 m L浓度为0.045%的NaClO_2与40℃,500 m L浓度为0.2%的KMnO_4串联脱硝效率最高,达95%以上。而采用KMnO_4并联脱硝效率为83%,明显低于串联效果。得出结论:处理相同量的氮氧化物,串联比并联的脱硝效率高得多。展开更多
基金This work was partially supported by the National Natural Science Foundation of China(Grant No.10471078)the Special Research Foundation for the Doctoral Program of Higher Education of China(Grant No.20040422004)Hong Kong Research Grants Council(Grant No.CityU 1056/01E).
文摘We prove that, for any given vertexν* in a series-parallel graph G, its edge set can be partitioned into k= min{k′(G) + 1,δ(G)} subsets such that each subset covers all the vertices of G possibly except forν*, whereδ(G) is the minimum degree of G and k′(G) is the edge-connectivity of G. In addition, we show that the results in this paper are best possible and a polynomial time algorithm can be obtained for actually finding such a partition by our proof.
文摘为研究湿法氧化脱除烟气中NO的效果,采用实验测试和理论计算相结合的方法,选取了H_2O_2、NaClO_2和KMnO_43种氧化剂,在鼓泡反应装置中,测试氧化剂的氧化温度和浓度对脱硝效果的影响,确定了最优脱硝条件,在最优条件下分别进行了并联及串联的脱硝实验。结果表明,在30℃,1 000 m L浓度为0.045%的NaClO_2与40℃,500 m L浓度为0.2%的KMnO_4串联脱硝效率最高,达95%以上。而采用KMnO_4并联脱硝效率为83%,明显低于串联效果。得出结论:处理相同量的氮氧化物,串联比并联的脱硝效率高得多。
