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Biomedical subjects

Mark Mackenzie

Publications and source records attributed to Mark Mackenzie.

2 recordsLinked to original sources
PubMed2004

Gaussian filters and filter synthesis using a Hermite/Laguerre neural network.

A neural network for calculating the correlation of a signal with a Gaussian function is described. The network behaves as a Gaussian filter and has two outputs: the first approximates the noisy signal and the second represents the filtered signal. The filtered output provides improvement by a factor of ten in the signal-to-noise ratio. A higher order Gaussian filter was synthesized by combining several Hermite functions together.

Neural Networks, Computer↗
PubMed2004

Asymmetric kernel regression.

Kernel regression is one model that has been applied to explain or design radial-basis neural networks. Practical application of the kernel regression method has shown that bias errors caused by the boundaries of the data can seriously effect the accuracy of this type of regression. This paper investigates the correction of boundary error by substituting an asymmetric kernel function for the symmetric kernel function at data points close to the boundary. The asymmetric kernel function allows a much closer approach to the boundary to be achieved without adversely effecting the noise-filtering properties of the kernel regression.

Neural Networks, Computer↗