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; Abstract: Based on Thomas-Fermi model, the interior potential boundary condition with the effect of electric field was defined, the calculation method of free energy for atom cluster under... of lithium, and with the increasing of electric field intensity the free energy margin of two kinds of solid solution becomes bigger. Key words: free energy; electric field; Thomas-Fermi model; Al-Cu-Li......
Thomas-Fermi模型含外电场作用的铝镁合金熵能的计算 刘霞1,张建军1,王永欣1,陈铮1 (1.西北工业大学,陕西,西安,710072) 摘要:本文基于Thomas-Fermi(TF)模型,提出外势场与原子内势场的作用,确定外势场对体系势场边界条件的影响,建立了外电场作用下的原子势场外边界条件.应用体积相加法,把单原子TF模型推广到化合物和固溶体.并以Al,Mg,Li等元素的单原子,Al-Mg固溶体,Mg5Al8化合物为例,计算和分析了电场作用对体系的熵能的影响.结果表明:熵能在整个电场区域内呈先减小后增大的变化趋势,并且边界势下和极板电压下的整体变化趋势一致,但零点处熵能的变化趋势不同. 关键词:Thomas-Fermi模型; 静电场; 铝镁合金; 熵能; [全文内容正在添加中] ......
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Spatiotemporal model of open-pit based on 3-D deposit modelXIA Chun-lin1, ZHOU Hui1, LI Qing-yuan2, MA Zhen-li3(1. School of Geomatics, Liaoning Technical University, Fuxin 123000, China; 2. State... method was put forward to make up the three-dimensional deposit model, and the spatiotemporal models of open-pit with temporal dynamics were also studied combined with the corrected models......
A dynamic model for railway freight overbookingFENG Fen-ling(冯芬玲), ZHANG Jia-qi(张佳琪), GUO Xiao-feng(郭晓峰) (School of Traffic and Transportation Engineering, Central South University, Changsha 410075, China)Abstract:In order to apply overbooking idea in Chinese railway freight industry to improve revenue, a Markov decision process (dynamic programming) model for railway freight reservation......
J. Cent. South Univ. (2017) 24: 2010-2018 DOI: https://doi.org/10.1007/s11771-017-3610-x Development of dynamic-mathematical model of hydraulic excavator Vujic Dragoljub1, Lazarevic Olgica2, Batinic... deals with analysis of dynamic behaviour of hydraulic excavator on the basis of developed dynamic-mathematical model. The mathematical model with maximum five degrees of freedom is extended by new......
Ribbon model based path tracking method for autonomous ground vehiclesCHEN Qing-yang(陈清阳), SUN Zhen-ping(孙振平), LIU Da-xue(刘大学), LI Xiao-hui(李晓辉) (College of Mechatronic Engineering and Automation... out and an important conclusion was got. The vehicle-road model is crucial for path following. Based on the conclusion, a new vehicle-road model named "ribbon model" was constructed with consideration......
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J. Cent. South Univ. (2016) 23: 3100-3107 DOI: 10.1007/s11771-016-3375-7 Catalytic cracking mechanisms of tar model compounds CHEN Bo(陈波)1, SHI Zhang-ming(时章明)1, JIANG Shao-jian(蒋绍坚)1, TIAN Hong(田红... model compound. Phenol, toluene and benzene were selected as the tar model compounds and CaO was selected as the catalyst. The pathways of tar compound radical absorbed by CaO were determined firstly......