Seismic waves propagation with an oblique angle to the tunnel axis will cause asynchronous motions and have a significant effect on axial response. A high-precision 2.5D finite element method is established in frequency domain simulate 3D seismic response of tunnel. This avoids disturbance caused by truncation longitudinal direction. Meanwhile, zigzag-paraxial boundary derived further improve c...

in this paper a guided tabu search (gts) is utilized for optimal nodal ordering of finite element models (fems) leading to small profile for the stiffness matrices of the models. the search strategy is accelerated and a graph-theoretical approach is used as guidance. the method is evaluated by minimization of graph matrices pattern equivalent to stiffness matrices of finite element models. comp...

On the verge of the Constitutionalist Revolution in Iran, the three social forces existing in the socio-political arena were competing with each other and at the same time, struggling with the Monarchy to increase their share of power: independent intellectuals, traditional followers of religion, and merchants. This rivalry set the scene for a discursive battle in which, each social force was t...

The diffusion quantum Monte Carlo DMC method is the most accurate approach available for calculating the total energies of solids and large molecules.1 Energy gradients are also of great significance in quantum mechanical calculations, because they give the forces on atoms which may be used to relax structures and perform molecular dynamics simulations. Progress in such calculations using DMC m...

Assessing the geomagnetic hazard to power systems requires reliable modelling of the geomagnetically induced currents (GIC) produced in the power network. This paper compares the Nodal Admittance Matrix method with the Lehtinen–Pirjola method and shows them to be mathematically equivalent. GIC calculation using the Nodal Admittance Matrix method involves three steps: (1) using the voltage sourc...

on the verge of the constitutionalist revolution in iran, the three social forces existing in the socio-political arena were competing with each other and at the same time, struggling with the monarchy to increase their share of power: independent intellectuals, traditional followers of religion, and merchants. this rivalry set the scene for a discursive battle in which, each social force was t...