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J. Cent. South Univ. (2012) 19: 1399-1410 DOI: 10.1007/s11771-012-1156-5 Dynamic analysis of dam-reservoir-foundation interaction using finite difference technique M. Abdollahi, R. Attarnejad School...-foundation interaction was conducted using finite difference method (FDM). The Timoshenko beam theory and the Euler-Bernoulli beam theory were implemented to draw out governing equation of beam......
A NOVEL APPROACH FOR THE PREDICTION OF SURFACE PROFILE OF OUTGOING WORKPIECE AND THE CALCULATION OF MEAN ROLL RADIUS IN ALLOY BAR ROLLING Y.G. Dong1,W.Z. Zhang1,J.F. Song2 (1.College of Mechanical... spread. Then the curvature radius of stress free surface and the "critical point on the contact boundary" have been solved, the surface profile of outgoing workpiece has been obtained. Furthermore......
Chemical leaching mechanism of chalcopyrite with difference mineralizationJing Bai,Jian-Kang Wen,Song-Tao Huang,Biao WuNational Engineering Laboratory of Biohydrometallury, General Research Institute for Nonferrous Metals摘 要:This paper presents the effect of mineralization on chalcopyrite chemical leaching in very simple H2SO4 solution systems at pH 1.0......
the real-time requirement. One-dimensional finite difference method could realize real-time control in the case of neglecting both the circumferential and radical heat exchange, but the over-simplified modes resulted in poor accuracy. And two-dimensional full explicit difference was also limited in practical application since its time step was restricted to keep the model stable. Consequently, a new......
直接进样-冷原子吸收光谱法测定矿产品中汞余淑媛1,陈向阳2,冯均利2,李彬2,张珠福2,任聪2,刘志红2,吴景武2,王宏菊2,邹春海2(1.广东省深圳市 深圳出入境检验检疫局2.深圳出入境检验检疫局,广东深圳 518045)摘 要:无需离线的化学前处理而直接进样,热解汞齐化后在波长253.65 nm处用冷原子吸收光谱法进行汞的测定.对取样量,样品测定方式及背景值控制,仪器分析条件的选择等进行了探讨.方法的线性范围为0.1600 ng,检出限为0.000 7μg/g.将该方法用于两个参考矿产样中汞的测定,结果与参......
Ni75AlxCr25-x合金时效组织演变行为微观相场模拟张济祥1,陈铮1,来庆波1,赵彦1(1.陕西省西安市西北工业大学材料科学与工程学院)摘 要:利用三元微观相场动力学模型,结合原子图像,有序相颗粒半径和和体积分数等手段模拟研究不同浓度的Ni75AlxCr25-x合金973K下的时效组织演变行为.结果表明,x=6,8,10三种Ni75AlxCr25-x合金时效过程中均析出DO22和L12两种有序相.随着Al含量的增加,L12相颗粒的尺寸增大,体积分数增加,相应的DO22相颗粒的尺寸减小,体积分数减少.无论D......
for Au-Cu [13-15], Ag-Cu and Ti-Al systems through the study of volume and energy functions associated with electronic structures of alloys. 4) The difference values between partial and average atomic... Relationship between partial and average atomic volumes of components in Au-Ni alloys XIE You-qing1, 2 1. School of Materials Science and Engineering, Central South University, Changsha 410083......
Efects of Die Corner Radius and Temperature on the Formability of AA7075-T6 AlloyHatice Evlen,brahim Kad,Mustafa Ya sarTechnology Faculty, Karabuk University摘 要:radius......
cutting mechanical model of disc cutter was established and the influence of installation radius, the phase difference and the cutter space on the mechanics of disc cutter were analyzed. The results... is a polyline and its height is determined by phase angle and penetration of cutting tools. Both phase difference and the installation radius between adjacent disc cutters have little effect on the vertical force......
Fractal Behaviour of Atomic Scale Microstructures:an Introduction沙维摘 要:<正> The properties of all materials depend largely on their chemical compositions.Compositional analysisby using the atom probe suggests that it is necessary to invent new parameters to describe some aspects ofmicrostructures.Experimental and calculation work indicates......