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解译.关键词:探地雷达；无单元法；随机介质模型Element free method forward modeling of GPR based on random medium modelDAI Qian-wei, WANG Hong-hua(School of Geosciences and Info-Physics, Central South University, Changsha... according to the theory of spectral factorization in stochastic processes and mixed autocorrelation function. Application of element free method in GPR forward modeling was introduced in detail......
Deformation behavior of A6063 tube with initial thickness deviation in free hydraulic bulging YANG Lian-fa(杨连发)1, 2, GUO Cheng (郭 成)1, DENG Yang(邓 洋)2 1. School of Mechanical Engineering... 2006 Abstract: Experiment on seamless tubes of aluminum alloy A6063 with initial thickness deviation of 0–20% was conducted through a free hydraulic bulging with tube ends free. The influence of initial......
="ChDivSummary" name="ChDivSummary">The essence of oxidation wear machanism of cenmented carbide tool was studied based on thermodynamics. Standard Gibbs free energy of possible reactions in cutting process at different temperature was calculated using substance Gibbs free energy function methods, and the sequence of reaction possibility order was researched as well as characteristics of every reaction......
Analysis of free vibration characteristic of steel-concrete composite box-girder considering shear lag and slipZHOU Wang-bao(周旺保)1, JIANG Li-zhong(蒋丽忠)1, 2, YU Zhi-wu(余志武)1, 2(1. School of Civil... decreases. The proposed approach provides theoretical basis for further research of free vibration characteristics of steel-concrete composite box-girder.Key words:steel-concrete composite box-girder......
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纳米尺度下体系自由能对扩散模型的影响 曹保胜1,何洋洋2,董斌1 (1.大连民族学院理学院,大连,116600;2.杜伊斯堡埃森大学物理系,杜伊斯堡,47057) 摘要:讨论了纳米尺度下体系自由能的改变对扩散模型的影响.随着体系尺度的逐渐减小,扩散模型由Fick扩散定律转变为Cahn-Hilliard扩散方程和非均匀体系非线性动力学扩散模型,原子的扩散系数也随体系自由能的变化呈现出与局部原子浓度紧密相关的趋势.纳米尺度下体系自由能的变化是导致扩散模型改变的根本原因,体系非均匀性对自由能的贡献越大导致需采用非均匀体系非线性动力学扩散模型描述扩散. 关键词:纳米扩散; 自由能; Cahn-Hilliard扩散方程; 非线性动力学扩散模型; nano diffusion; free energy; Cahn-Hilliard equation; nonlinear kinetic......
at about 60-90 ℃[11]. So, the formation of the P-containing free radical with P=O and -OH needs higher energy, i.e. the reaction between α-olefin and H3PO2 requires higher initiating temperature...复辉)2, LI Guo-bao(李国宝)2 1. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China; 2. Beijing National Laboratory for Molecular Sciences, Beijing 100080, China; 3......
(刘江维)1, ZENG Ping-wang(曾萍旺)1, RAO Zheng-hua(饶政华)1, ZHANG Tian-li(张天理)2 1. School of Energy Science and Engineering, Central South University, Changsha 410083, China; 2. School of Materials Engineering.... A transient 3D model including heat transfer, fluid flow and tracking of free surface is built in this study. The transport phenomena are investigated by calculating the temperature and velocity fields......
J. Cent. South Univ. Technol. (2007)06-0858-06 DOI: 10.1007/s11771-007-0163-4 Buckling analysis of super-long rock-socketed filling piles in soft soil area by element free Galerkin..., and a newly invented numerical analysis method, i.e. the element-free Galerkin method (EFGM), was introduced to consider the non-concordant deformation and nonlinearity of the pile-soil interface......
angles of glycerol, benzene and diiodomethane on the main minerals in red mud from alumina production were measured, and the corresponding surface free energy values were estimated by Owens two liquids... mud; surface free energy; Owens two liquids method; sedimentation ability; goethite 赤泥是氧化铝生产中的残渣,物相复杂,主要有赤铁矿,针铁矿,水合铝硅酸钠(方钠石),硅酸二钙,水化石榴石,钛酸钙,石灰石以及少量未溶出的氧化铝水合物等[1-4].氧化铝工业一般采用絮凝沉降的方法将赤泥与溶液进行分离.但随着铝土矿资源的日......
