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Neural network programming in bioprocess variable estimation and state prediction
Linko, Pekka ; Zhu, Yihong
Journal of biotechnology, 1991-12, Vol.21 (3), p.253-269
[Periódico revisado por pares]
Lausanne: Elsevier B.V
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Título:
Neural network programming in bioprocess variable estimation and state prediction
Autor:
Linko, Pekka
;
Zhu, Yihong
Assuntos:
Algorithms
;
back propagation
;
biochemistry
;
Biological and medical sciences
;
Biotechnology
;
Biotechnology - methods
;
computer applications
;
Computer Simulation
;
Fundamental and applied biological sciences. Psychology
;
General aspects
;
Kinetics
;
machine learning
;
Mathematics
in biology. Statistical analysis. Models. Metrology. Data processing in biology (general aspects)
;
Neural network
;
neural networks
;
Neural Networks (Computer)
;
process
engineering
;
State prediction
;
Variable estimation
É parte de:
Journal of biotechnology, 1991-12, Vol.21 (3), p.253-269
Notas:
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ObjectType-Article-1
ObjectType-Feature-2
Descrição:
A neural network program with efficient learning ability for bioprocess variable estimation and state prediction was developed. A 3 layer, feed-forward neural network architecture was used, and the program was written in Quick C ver 2.5 for an IBM compatible computer with a 80486/33 MHz processor. A back propagation training algorithm was used based on learning by pattern and momentum in a combination as used to adjust the connection of weights of the neurons in adjacent layers. The delta rule was applied in a gradient descent search technique to minimize a cost function equal to the mean sqaure difference between the target and the network output. A non-linear, sigmoidal logistic transfer function was used in squashing the weighted sum of the inputs of each neuron to a limited range output. A good neural network prediction model was obtained by training with a sequence of past time course data of a typical bioprocess. The well trained neural network estimated accurately and rapidly the state variables with or without noise even under varying process dynamics.
Editor:
Lausanne: Elsevier B.V
Idioma:
Inglês
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