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Diesel traction Locomotives are widely used in railway tunnels in the plateau of China. Harmful gases given out by internal combustion engines must be excluded from the tunnel for human safety on railway. In the present study, nitrogen dioxide (NO2) was taken into account as a representative harmful pollutant of the investigation object. Natural ventilation of diluting the concentration of NO2 pollutant...
In the previous studies on heat transfer performance of the flat-tube and multi-louvered fin heat exchangers, most of the numerical studies generally select a heat transfer unit as the computational domain for the effective realization of CFD (Computational Fluid Dynamics). The majority of the numerical studies usually simply treated the flat-tube water side as fixed wall temperature or convective...
This paper presents accurate analytical models to calculate the electrostatic gate capacitance of 1-D field-effect transistors (FETs) with multiple cylindrical conducting channels. Gate capacitance Cgg is decomposed into three major components: 1) capacitance Cgc between the gate and the parallel cylindrical conducting channels (the number of channels ges 1) in dual-layer dielectric materials; 2)...
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