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The optical properties of nanostructures with nonlocal effects is analysied by the finite element method method. The nonlocal effects can be described by a spatially nonlocal dielectric function with Drude model plus two Lorentz pole oscillator dielectric model. The optical properties of Au nanotubes with different radii, distance of junctions, can be determined by tuning the corresponding parameters...
The finite-difference time-domain (FDTD) method is proposed to model Maxwell-Bloch equations with a four-level quantum system for investigating the nano-structures incorporated with gain materials. To understand the lasing behavior and loss compensation mechanism of the gain material, a self-consistent computational scheme is presented. Comparisons between optical and homogeneous Pumping are given...
The dynamic characteristics of side bearing are one of the key factors for further study on the overall behaviour of the dynamic track stabilizer. The constitutive parameters of rubber spring were determined by the static experiment. Based on the parameters, the finite element model of side bearing was built and the reliability of side bearing model was verified by experiment. The vertical dynamic...
Electric fields with double compensatory anticathode in the sea were formulated and simulated on the basis of one compensatory anticathode mathematical model and distribution of electric field was analyzed. Number position and current of compensatory anticathode were optimized base on evolutionary programming arithmetic; also electric fields compensated and uncompensated were compared. It shows that...
This paper proposes a Stackelberg differential game model of the higher government's subsidy for the lower government's investment in setting up an effective, perfect E-government system. The higher government, as a Stackelberg leader, controls his subsidy rate for the lower government, and the lower government, as a follower, controls his investment level in E-government system. We give the steady...
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