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Husniddin Khayrullaev, Issa Omle and Endre Kovács
We systematically investigate the performance of numerical methods to solve Fisher?s equation, which contains a linear diffusion term and a nonlinear logistic term. The usual explicit finite difference algorithms are only conditionally stable for this eq...
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Zhiyuan Hu, Peng Yu, Guohua Xu, Yongjie Shi, Feng Gu and Aijun Zou
Tiltrotors permit aircrafts to operate vertically with lift, yet convert to ordinary forward flight with thrust. The challenge is to design a tiltrotor blade yielding maximum lift and thrust that converts smoothly without losing integrity or efficiency. ...
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Firas Daghistani, Abolfazl Baghbani, Hossam Abuel Naga and Roohollah Shirani Faradonbeh
This study aimed to examine the shear strength characteristics of sand?granular rubber mixtures in direct shear tests. Two different sizes of rubber and one of sand were used in the experiment, with the sand being mixed with various percentages of rubber...
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Omar Khalil, Hany El-Sharkawy, Maha Youssef and Gerd Baumann
We propose a new method of adaptive piecewise approximation based on Sinc points for ordinary differential equations. The adaptive method is a piecewise collocation method which utilizes Poly-Sinc interpolation to reach a preset level of accuracy for the...
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Lin Liu, Xiumei Zhang, Yunjia Ji and Xiuming Wang
A knowledge of wave propagation in boreholes with gas hydrate-bearing sediments, a typical three-phase porous medium, is of great significance for better applications of acoustic logging information on the exploitation of gas hydrate. To study the wave p...
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Saeid Taghizadeh and Robert Sean Dwyer-Joyce
When two rough surfaces are loaded together contact occurs at asperity peaks. An interface of solid contact regions and air gaps is formed that is less stiff than the bulk material. The stiffness of a structure thus depends on the interface conditions; t...
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Javad Enferadi, Mohammad Tavakolian
Pág. 107 - 114
Dynamics of a highly stiff parallel machine tool is the subject of this paper. High stiffness, good accuracy, relatively large workspace and free of singularities on the whole workspace makes the manipulator suitable for machining applications as an XY-T...
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H. S. Mikhalchenko,V. M. Yazykov,V. S. Kossov,O. V. Spirov
Pág. 139 - 142
Results of detailed simulation of motion of the freight locomotive equipped with original three axle bogies with the radial steering mechanism designed by VNIKTI are given. The simulation was performed with the help of the program UM Loco developed at BS...
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