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Three director profiles of nematic liquid crystal (NLC) cells are presented to elucidate the mechanism of light leakage induced by some defects hidden in NLC cells. In accordance with Landau-de Gennes theory, we simulated the dynamics of these defect profiles using the 2-D finite-difference iterative method and calculated their transmittance using the Jones calculus. Results show that light leakage...
In this paper, a wavelet-based neural network (WNN) is introduced for nonlinear system identification. The structure of the WNN is similar to that of multi-layer perceptron (MLP), except that here the activation function of the hidden nodes is replaced by a wavelet function. It will be proved that any function f ∊ L2(Rn) can be approximated on any bounded domain by the WNN. Employing the MLP-like...
Rapid urbanization has posed a considerable impact on the earth such as environment deterioration and resources degradation. Effectively predicting and evaluating the development trend of urban coordinated degree are key issues for urban sustainable development. In the paper, Important impact factors of coordinated development degree are obtained from grey relational analysis (GRA), and a Radial Basis...
Due to the complex structure of the large vertical quench furnace, it is difficult to establish its distributed parameter control model. In this paper, under the premise of high-precision temperature control accuracy, the furnace structure is simplified reasonably. By the simplification of component heating process in the multi-zone heating furnace, a second order partial differential equation of...
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