Recent experiments have shown that silane pyrolysis in a gas-solids fluidized bed may be an attractive way to produce ultra-pure silicon. Such a process would possess the general advantages of fluidized bed technology, namely, good contacting, thermal homogeneity, thorough mixing of particles, easy solids handling, and low pressure drop. Such a fluidized bed reactor is simulated using the two-f...

In this paper, the mechanical behavior of three-phase inhomogeneous materials is modeled using the meso-scale model with lattice beams for static and dynamic analyses. The Timoshenko beam theory is applied instead of the classical Euler-Bernoulli beam theory and the mechanical properties of lattice beam connection are derived based on the continuum medium using the non-local continuum theory. T...

Multiphase machines have been recognized in the last few years like an attractive alterna‐ tive to conventional three-phase ones. This is due to their usefulness in a niche of applica‐ tions where the reduction in the total power per phase and, mainly, the high overall system reliability and the ability of using the multiphase machine in faulty conditions are required. Electric vehicle and rail...

Lappeenranta University of Technology Acta Universitatis Lappeenrantaensis 570 Samuli Kallio Modeling and Parameter Estimation of Double-Star Permanent Magnet Synchronous Machines Lappeenranta 2014 68 p. ISBN 978-952-265-563-9 ISBN 978-952-265-564-6 (PDF) ISSN-L 1456-4491, ISSN 1456-4491 The power rating of wind turbines is constantly increasing; however, keeping the voltage rating at the low-v...

A number of electric and magnetic signals have been observed on La Fournaise volcano, attributed to electrokinetic effects. A simple model is proposed here to check this hypothesis. The volcano is idealized as a 2d heterogeneous structure composed of a fractured zone located between two porous zones through which meteoritic waters flow downwards; flow occurs predominantly in the fractured zone ...

Entity Attribute Value (EAV) storage model is extensively used to manage healthcare data in existing systems, however it lacks search efficiency. This study examines an entity attribute value style modeling approach for standardized Electronic Health Records (EHRs) database. It sustains qualities of EAV (i.e., handling sparseness and frequent schema evolution) and provides better performance fo...

CNT nanocomposites used for thin-film transistors (TFTs) provide one of the first technologically-relevant test beds for 2D heterogeneous percolating systems. The characteristics of these TFTs are predicted by considering the physics of heterogeneous finite-sized networks and interfacial traps at the CNT/gate-oxide interface. Close agreement between our numerical results and different experimen...

Because of diversity, complexity and poor information about non-layered orebody, it is difficult to be accurately described by regular geometry model. Mining engineers couldn’t accurately estimate the space distribution law of orebody's grade, quality and the total reserve according to the traditional 2-dementional (2D)graphics. So it is necessary to accurately establish non-layered orebody mod...