A novel backward elimination algorithm (BEA) based on the energy contributions of the non-orthogonal (coupled) regressor vectors is introduced for radial basis function (RBF) neural network construction. This algorithm builds RBF model by eliminating the minimum contribution regressor term among all candidates according to mean predictedresidual- sums-of-squares (PRESS) error. It first generates an initial model using computationally affordable batch learning and then updated it by a sequent learning with new training samples arriving. During the whole learning, the network architecture always remains the most optimal. This also can assure a better RBF network even if the RBF original basis is non-orthogonal. The effectiveness of new algorithm is demonstrated by the simulated results.
Dispersion compensation with a wavelength selective switch-based reconfigurable optical add/drop multiplexer is experimentally realized in an optical transport network testbed. Through considering various dispersion compensation scenarios (including different fiber types, different wavelength ranges, and single- and multi-channel cases), we show that without deploying new optical components, a wavelength selective switch can successfully compensate for chromatic dispersion in its dispersion control range.
We propose a simple and novel solution for 40G and higher rate optical transport. It elaborately employs state
of polarization without relying on complicated receiver structures, such as Stokes receivers, polarization
controllers. By altering both polarizations and phase of lightwave, it can increase the spectral efficiency. As a
constant power modulation format and an alternative polarization modulation format, D-mPSK-PolSK is highly
tolerant to fiber nonlinearity.
Coherent optical DFT-Spread OFDM is a promising technology, which not only includes the
advantage of coherent optical OFDM, but also presents low PAPR value. We experimentally
demonstrate 1.45-Tb/s single channel coherent optical DFT-Spread OFDM over 480-km SSMF
transmission.
This article introduces technical achievement, equipment exploitation, experimental test and project application of the national item "32×10Gb/s SDH Wavelength Division Multiplex system" which is undertook by Wuhan Research Institute of Post and Telecommunications.
The auto-fluorescence of breast cancer cells, early malignant cells of cystic mazoplisis and simple mazoplisis cells is researched with a confocal laser scanning microscope. It is found that there is a correlation between the cell malignant degree and its auto-fluorescence intensity: the auto-fluorescence in the plasma of breast cancer cells is most intensive, in the plasma of early malignant cells of cystic mazoplisis is less and there is no auto-fluorescence observed in the plasma of simple mazoplisis cells. This auto-fluorescence characteristic may provide an important basis for early diagnosis of tumor.
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