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Mathematical Problems in Engineering
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Mathematical Problems in Engineering
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2012
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Article
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Tab 3
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Research Article
Sludge Bulking Prediction Using Principle Component Regression and Artificial Neural Network
Table 3
Eigenvalue and percentage variance of the 9 principle components for the prediction model.
PC
1
2
3
4
5
6
7
8
9
Eigenvalue
4.3
1.3
1.1
0.9
0.7
0.3
0.2
0.1
0.1
% variance
47.8
14.8
12.5
10.3
7.4
3.6
1.9
1.1
0.6