Einsteinian neural network for spectrum estimation

1997 ◽  
Vol 10 (9) ◽  
pp. 1541-1546 ◽  
Author(s):  
Leonid I. Perlovsky ◽  
Charles P. Plum ◽  
Peter R. Franchi ◽  
Elihu J. Tichovolsky ◽  
David Choi ◽  
...  
Author(s):  
Catur Atmaji ◽  
Zandy Yudha Perwira

In this study, observation on the differences in features quality of EEG records as a result of training on subjects has been made. The features of EEG records were extracted using two different methods, the root mean square which is acquired from the range between 0.5 and 5 seconds and the average of power spectrum estimation from the frequency range between 20 and 40Hz. All of the data consists of a 4-channel recording and produce good quality classification on artificial neural network, with each of which generates training data accuracy over 90%. However, different results are occured when the trained system is tested on other test data. The test results show that the two systems which are trained using training data with object with color background produce higher accuracy than the other two systems which are trained using training data with object without background color, 63.98% and 60.22% compared to 59.68% and 56.45% accuracy respectively. From the use of the features on the artificial neural network classification system, it can be concluded that the training system using EEG data records derived from the visualization of object with color background produces better features than the visualization of object without color background.


Author(s):  
Keisuke Kinoshita ◽  
Marc Delcroix ◽  
Haeyong Kwon ◽  
Takuma Mori ◽  
Tomohiro Nakatani

2009 ◽  
pp. 256-283 ◽  
Author(s):  
Naoyuki Morita

The author proposes an automatic estimation method for nuclear magnetic resonance (NMR) spectra of the metabolites in the living body by magnetic resonance spectroscopy (MRS) without human intervention or complicated calculations. In the method, the problem of NMR spectrum estimation is transformed into the estimation of the parameters of a mathematical model of the NMR signal. To estimate these parameters, Morita designed a complex- valued Hopfield neural network, noting that NMR signals are essentially complex-valued. In addition, we devised a technique called sequential extension of section (SES) that takes into account the decay state of the NMR signal. Morita evaluated the performance of his method using simulations and shows that the estimation precision on the spectrum improves when SES is used in combination the neural network, and that SES has an ability to avoid the local minimum solution on Hopfield neural networks.


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