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J. Cent. South Univ. (2021) 28: 1747-1764 DOI: https://doi.org/10.1007/s11771-021-4730-x Rotation forest based on multimodal genetic algorithm XU Zhe(徐喆)1, 3, NI Wei-chen(倪维晨)2, JI Yue-hui(吉月辉)1, 3... the multi-objective optimization algorithm, there is only one single optimization objective in the GA-based multimodal optimization method. Figure 2 (a) Decision boundary before data rotation;(b......
the predominant phase despite the use of aluminate-based electrolytes. The silicon in the present coatings comes from the electrolyte; however, regardless of its origin, the presence of Si in the coating.... 5(b)) shows that the aluminate coating is dense and single- layered, with a thickness of ~28 μm. The coating/Al layer interface is nearly parallel to the horizontal direction, which is different......
MgH2和Mg2FeH6的晶体结构示意图 Fig.2 Schematic diagram of crystal structures for MgH2 and Mg2FeH6: (a) MgH2; (b) Five-times unit of MgH2; (c) Mg2FeH6 表1 MgH2晶格常数(a, c, a/c)的比较 Table 1  .... 表2 晶体和超胞模型的平衡晶格常数(a),(c)以及总能量 Table 2 Equilibrium lattice constant (a), (c) and total energies of crystal and supercell model Mg2FeH6的晶胞结构(Mg8Fe4H24)如图2(c)所示,为反CaF2结构,仅由晶格常数a决定,空间群为......
reported. Based on corresponding works in recent years, key trends and roles of solution redox potential in copper hydrometallurgy, including its definition, effect and maintenance, have been... based on the above-mentioned as following: formation of a sulfur (S0) layer [79, 86-89], formation of a copper polysulfide (Sn2-) product [16, 30, 90, 91], and formation of insoluble sulfate (SO42......
合金析出相成分及晶体结构[21] Table 3 Composition and crystal structure of some precipitated phases in Al-Cu series alloys[21] 实际使用的Al-Cu-Mn合金主要在富Al区,Al-Cu-Mn三元合金的平衡相图如图3所示,合金系包含了一些稳定相...成的耐热相对高温强度增强的贡献更大.Al-Cu-Mn-Ni合金时效处理过程中形成的θ″相可作为高温下的耐热强化相.有力地证实了一种新的观点:通过固溶处理过程中形成的小分散颗粒和时效处理过程中形成的细小沉淀来增强基质应引起更多关注. 导致Al-Cu合金耐热性能和抗蠕变性能下降的原因主要是亚稳相在高温时会发生粗化,因此通常会采用合金化方法使析出相的尺寸减小,数量增加,例如加入Sc,Zr等元素.LI等......
starts to propagate, the cracking rate becomes dependent on the applied stress intensity. However, based on strong changes in the stress intensity dependence, the cracking rate vs stress intensity graph... to increasing in size of matrix precipitate and the associated changes from GP zone to semi-coherent and in coherent precipitates. It has been reported that a single step aging to the T73 and T76 regarded......
adopted a number of screening methods: cost per unit property method [10], chart method [11-16], questionnaire method [10], knowledge base systems [17-22], case based reasoning [23], neural networks... and material alternatives have also been delineated in Appendix 1. JEE et al [48] used the TOPSIS method to develop an interactive program based on Visual Basic programming language. The interactive program......
of composite was studied based on the thermodynamic calculation and microstructure analysis. Toughening mechanisms of composite were investigated by analyzing its mechanical properties and crack propagation... was based on data of thermodynamic software FactSage (5.4.1, Canada) and Gibbs-Helmholtz equation [15]. For a reaction: aA+bB=cC+dD, the Gibbs free energy change of the reaction can be expressed......
: Electrochemical stability of single particles[J]. J Power Sources, 2000, 90(1): 109-115. [6] GNANARAJ J S, POL V G, GEDANKEN A, AURBACH D. Improving the high-temperature performance of LiMn2O4 spinel......
, ZHANG X H, WANG B W, NI X Y. Effect of diopside addition on sintering and mechanical properties of alumina [J]. Ceramics International, 2009, 35: 1321-1325. [12] WANG C J, HUANG C Y. Effect of TiO2... conductivity of BeO single crystals [J]. Journal of Applied Physics, 1971, 42(12): 4713-4717. [28] 高陇桥. 大功率真空电子器件实用的高导热率陶瓷的进展[J]. 真空电子技术, 1999, 2: 27-31.GAO Long-qiao. The progress of the practical high thermal......