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    ABSTRACT: Chen, Cybenko, Funahashi, Babri, Gorban, Barron and others studied function approximation capabilities by feed forward neural networks. Ramakrishnan and his collaborators introduced the left sigmoidal and right sigmoidal signals to prove some function approximation theorems in continuous functions. In this paper, the right sigmoidal signal is used to establish function approximation theorems using infimum and supremum operators.
    Machine Learning and Applications (ICMLA), 2010 Ninth International Conference on; 01/2011
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    ABSTRACT: In this study, Finite-Difference Time-Domain (FDTD) method is used to calculate the Specific Absorption Rate (SAR) distribution in a human head near a hand-held cellular phone. Progress in computer technology enables us to use FDTD method to numerically calculate the interactions of human head and mobile. The biological effects of Radio Frequency (RF) energy are proportional to the rate of energy absorption. A novel method for the modeling of human head is carried out using the MATLAB 7.2 Software, which employs FDTD method for the SAR calculations. A three dimensional FDTD algorithm is built in Cartesian coordinates. Perfectly Matched Layer (PML) which is one of the most flexible and efficient ABCs is implemented to avoid reflections. It is a popular method for mesh termination at a radiation boundary using FDTD. A discrete human head model is located within FDTD volume together with a discrete hand-held receiver model. FDTD simulations are carried out for Digital European Cordless Telephone (DECT) operating at 1.8 GHz system. SAR distributions over the human head are calculated and are shown to agree with results available in literature. Particular attention has been given for accurate power calculations. The computational results are interpreted in terms of international safety guidelines for human health. This paves the way to model cell phones with appropriate SAR.
    Electromagnetic Interference & Compatibility, 2008. INCEMIC 2008. 10th International Conference on; 12/2008

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International Journal of Heat and Mass Transfer 01/2009; 52:3009-3023.
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