The choice of speed and clearance for RAS on 3D method

In this paper, a 3D source distribution technique is used to calculate the coupled motions between two ships which advance in the wave with the same speed. The numerical results of coupled motions for a frigate and a supply ship have a good agreement with the experimental results. Based on the 3D coupled motions of two ships, a spectral analysis is employed to clearly observe the effect of speed, clearance and wave heading on the significant relative motion amplitude (SRMA) of two ships. The method presented in this paper will be helpful to select suitable clearance, speed and wave heading for underway replenishment at sea(RAS).

Performance of biological phosphorus removal and characteristics of microbial community in the oxic-settling-anaerobic process by FISH analysis

Performance of biological phosphorus removal in the oxic-settling-anaerobic(OSA) process was investigated. Cell staining and fluorescent in situ hybridization(FISH) were used to analyze characteristics and microbial community of sludge. Experimental results showed that phosphorus removal efficiency was near 60% and the amount of biological phosphorus accumulation in aerobic sludge of the OSA system was up to 26.9 mg/g. Biological phosphorus removal efficiency was partially inhibited by carbon sources in the continuous OSA system. Contrasted to the OSA system,biological phosphorus removal efficiency was enhanced by 14% and the average total phosphorus(TP) contents of aerobic sludge were increased by 0.36 mg/g when sufficient carbon sources were supplied in batch experiments. Staining methods indicated that about 35% of microorganisms had typical characteristics of phosphorus accumulating organisms(PAOs) . FISH analysis demonstrated that PAOMIX-binding bacteria were predominant microbial communities in the OSA system,which accounted for around 28% of total bacteria.

Effect of Levorotatory Amlodipine on carotid atherosclerosis, inflammatory response and endothelial function in hypertensive patients

Objective: To investigate the effect of Levorotatory Amlodipine on carotid atherosclerosis, inflammatory response and endothelial function in hypertensive patients. Methods: A total of 180 cases of patients with essential hypertension were randomly divided into control group and observation group. In the control group, life intervention was treated, and the observation group was treated with l-amlodipine in addition to life intervention, and continued treatment for 5 months. The oxidative stress index, inflammatory factor, vascular endothelial function index and β2-microglobulin and PDGF-BB levels were compared before and after treatment. Results: There were no significant differences in the levels of oxidative stress indicators MDA, SOD, inflammatory factors TNF- , hs-CRP, vascular endothelial function markers ET-1, NO,β2-microglobulin and PDGF-BB before treatment. The levels of MDA, TNF-α, hs-CRP, ET-1, β2-microglobulin and PDGF-BB in the two groups were significantly lower than those in the same group before treatment. The levels of SOD and NO were significantly higher than those in the same group. The levels of TNF-α and hs-CRP in the observation group were (26.64±2.79) ng/L and (8.29±3.15) mg/L, respectively, which were significantly lower than those in the control group. The level of ET-1 in the observation group was (50.31±21.72) ng/L significantly lower than that in the control group, and the level of NO was (78.27±16.14)μmol/L was significantly higher than that in the control group. The observation group β2-microglobulin and PDGF-BB were (2.29±0.23) mg/L and (19.06±1.91) ng/mL, which were significantly lower than the control group. Conclusion: L-amlodipine in the treatment of hypertension can effectively reduce the level of oxidative stress, inhibit the release of inflammatory factors and significantly improve vascular endothelial function, which has certain clinical value.

Optimization of iron ore blending based on replacing Australian low alumina limonite

Mauritanian iron ore powder(OM)has advantages of high iron grade,low aluminum content,and low loss on ignition,which can be used as a new mineral to replace low alumina limonite that has been exhausted in Australia.However,it will have a certain negative impact on sintering because of its high SiO_(2) content.The mechanism of SiO_(2) content affecting the sintering behavior was first studied through FactSage 7.2.Then,the liquid fluidity,penetration,and high-temperature performance of different iron ore powders were compared.Finally,the optimization of ore blending structure was studied by the micro-sintering method and the sinter pot test.The results show that the increase in SiO_(2) content can reduce the assimilation temperature.The low penetration of OM can lead to an increase in the amount of liquid,and the high SiO_(2) content of OM increases the viscosity of the liquid phase.What is more,the increase in SiO_(2) also increases the formation of silicate and fayalite phase and inhibits the formation of silico-ferrite of calcium and aluminum(SFCA).To optimize ore blending structure,OM and the low SiO_(2) powder OD from Australia were used together,which improves the content of SFCA by 2.04%and decreases the contents of calcium silicate and fayalite by 0.63%and 4.99%,respectively.The results of the sinter pot test indicated that the properties of sinter have been improved.

Some Results on Spanning Trees

Some structures of spanning trees with many or less leaves in a connected graph are determined.We show(1) a connected graph G has a spanning tree T with minimum leaves such that T contains a longest path,and(2) a connected graph G on n vertices contains a spanning tree T with the maximum leaves such that Δ(G) =Δ(T) and the number of leaves of T is not greater than n D(G)+1,where D(G) is the diameter of G.

On Axioms Contituting the Foundation of Hypergraph Theory

Hypergraphs 是有限集合的系统，是最一般的结构在处理分离系统的紧凑的数学和强大的工具。一般来说，数学的一个分支在一些公理上被造。参考科学家介绍了非循环的公理 forhypergraphs。在这篇论文，我们首先有关非循环的亢奋的图列出几结果，以便显示出那非循环公理组成非循环的亢奋的图理论的基础。然后，我们给周期公理盖住的表演的基本定理非循环公理并且组成亢奋的图理论的基础。

Equitable Total Coloring of F_n ∨ W_n

V ∪ 的全部的独立分区集合的最小的数字图 G 的 E (V， E ) 被称为 χ t (G) 。如果任何二个全部的独立分区的数字的差别 V ∪ 设定E 是仅仅一个，然后，全部的独立分区的最小的数字 V ∪ 设定E 被称为 G 的公平全部的色彩的数字，由 χ et (G) 。在这篇论文，我们与一样的顺序获得扇子和车轮的 join 图的公平全部的色彩的数字。

On Defected Colourings of Graphs

A k-edge-coloring f of a connected graph G is a(λ1, λ2, ···, λβ)-defected k-edge-coloring if there is a smallest integer β with 1 ≤β≤ k 1 such that the multiplicity of each color j ∈ {1, 2, ···, β} appearing at a vertex is equal to λj≥ 2, and each color of {β + 1, β + 2, ···, k} appears at some vertices at most one time. The(λ1, λ2, ···, λβ)-defected chromatic index of G, denoted as χ(λ1, λ2, ···, λβ; G), is the smallest number such that every(λ1, λ2, ···, λβ)-defected t-edge-coloring of G holds t ≥χ(λ1, λ2, ···, λβ; G). We obtain(G) ≤χ(λ1, λ2, ···, λβ; G) +βi=1(λi 1) ≤(G) + 1, and introduce two new chromatic indices of G as: the vertex pan-biuniform chromatic index χpb(G), and the neighbour vertex pan-biuniform chromatic indexχnpb(G), and furthermore find the structure of a tree T having χpb(T) = 1.

On the Discovery of the Cycle-axiom of Hypergraphs

In this paper,the path through which the cycle axiom of hypergraphs was discovered will be retraced.The long process of discovery will be described,in particular how acyclic hypergraphs originated from the study of relational database schemes and how cycles of hypergraphs originated from the study of acyclic hypergraphs.