Artificial neural network coupled with robust principal components in near infrared spectroscopic analysis

2012 ◽  
Author(s):  
Kim Seng Chia ◽  
Herlina Abdul Rahim ◽  
Ruzairi Abdul Rahim
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Principal Components ◽  
Near Infrared ◽  
Spectroscopic Analysis ◽  
Infrared Spectroscopic Analysis ◽  
Infrared Spectroscopic ◽  
Artificial Neural

scholarly journals Artificial neural network and partial least square in predicting blood hemoglobin using near-infrared spectrum

2019 ◽  
Vol 16 (2) ◽  
pp. 701
Author(s):  
Mohd Nazrul Effendy Mohd Idrus ◽  
Kim Seng Chia
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Latent Variables ◽  
Near Infrared ◽  
Spectroscopic Analysis ◽  
Partial Least Square ◽  
Least Square ◽  
Coefficient Of Determination ◽  
Artificial Neural ◽  
Artificial Neural Network Ann

<p>Predictive models is crucial in near-infrared (NIR) spectroscopic analysis. Partial least square - artificial neural network (PLS-ANN) is a hybrid method that may improve the performance of prediction in NIR spectroscopic analysis. This study investigates the advantage of PLS-ANN over the well-known modelling in spectroscopy analysis that is partial least square (PLS) and artificial neural network (ANN). The results show that ANN that coupled with first order SG derivatives achieved the best prediction with root mean square error of prediction (RMSEP) of 0.3517 gd/L and coefficient of determination ( ) of 0.9849 followed by PLS-ANN with RMSEP of 0.4368 gd/L and  of 0.9787, and PLS with RMSEP of 0.4669 gd/L and  of 0.9727. This suggests that the spectrum information may unable to be totally represented by the first few latent variables of PLS and a nonlinear model is crucial to model these nonlinear information in NIR spectroscopic analysis.</p>

scholarly journals Effect of Reconstruction Algorithm on the Identification of 3D Printing Polymers Based on Hyperspectral CT Technology Combined with Artificial Neural Network

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1963 ◽  
Author(s):  
Zheng Fang ◽  
Renbin Wang ◽  
Mengyi Wang ◽  
Shuo Zhong ◽  
Liquan Ding ◽  
...  
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
3D Printing ◽  
Principal Components ◽  
Reconstruction Technique ◽  
Ct Reconstruction ◽  
Training Set ◽  
X Ray ◽  
Test Sets ◽  
Artificial Neural

Hyperspectral X-ray CT (HXCT) technology provides not only structural imaging but also the information of material components therein. The main purpose of this study is to investigate the effect of various reconstruction algorithms on reconstructed X-ray absorption spectra (XAS) of components shown in the CT image by means of HXCT. In this paper, taking 3D printing polymer as an example, seven kinds of commonly used polymers such as thermoplastic elastomer (TPE), carbon fiber reinforced polyamide (PA-CF), acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), ultraviolet photosensitive resin (UV9400), polyethylene terephthalate glycol (PETG), and polyvinyl alcohol (PVA) were selected as samples for hyperspectral CT reconstruction experiments. Seven kinds of 3D printing polymer and two interfering samples were divided into a training set and test sets. First, structural images of specimens were reconstructed by Filtered Back-Projection (FBP), Algebra Reconstruction Technique (ART) and Maximum-Likelihood Expectation-Maximization (ML-EM). Secondly, reconstructed XAS were extracted from the pixels of region of interest (ROI) compartmentalized in the images. Thirdly, the results of principal component analysis (PCA) demonstrated that the first four principal components contain the main features of reconstructed XAS, so we adopted Artificial Neural Network (ANN) trained by the reconstructed XAS expressed by the first four principal components in the training set to identify that the XAS of corresponding polymers exist in both of test sets from the training set. The result of ANN displays that FBP has the best performance of classification, whose ten-fold cross-validation accuracy reached 99%. It suggests that hyperspectral CT reconstruction is a promising way of getting image features and material features at the same time, which can be used in medical imaging and nondestructive testing.

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