neural concepts and methods for process control and their use in the paper industry are discussed and illustrated. A basic problem in the paper industry is to produce pulp of optimal quality. A neural net has been use...
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neural concepts and methods for process control and their use in the paper industry are discussed and illustrated. A basic problem in the paper industry is to produce pulp of optimal quality. A neural net has been used to predict the optimal time for the cooking process. The neural net prediction model was found to give more accurate predictions than the originally used analytic model.
The modeling abilities of radial basis function networks were tested on a real plant. A training algorithm which allows an on-line adaptation of the neural plant model was developed. The results obtained during contro...
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The modeling abilities of radial basis function networks were tested on a real plant. A training algorithm which allows an on-line adaptation of the neural plant model was developed. The results obtained during control experiments were satisfactory in spite of the inverse model inaccuracy.
The paper outlines a general scheme for implementing neurofuzzy algorithms and emphasizes their desirable features for on-line and off-line learning. Examples will be used to show how these techniques can be used for ...
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The paper outlines a general scheme for implementing neurofuzzy algorithms and emphasizes their desirable features for on-line and off-line learning. Examples will be used to show how these techniques can be used for nonlinear modelling, reinforcement learning and on-line control.
The paper describes the application of the Kohonen feature map (KFM) for analyzing and splitting extensive load databases. The objective is to get separate clusters of load shapes for making short term load forecast (...
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The paper describes the application of the Kohonen feature map (KFM) for analyzing and splitting extensive load databases. The objective is to get separate clusters of load shapes for making short term load forecast (STLF) models with high accuracy. The forecast models are based on feedforward neuralnetworks.
Hypersonic aircraft require a high degree of system integration. Design tools are needed to provide rapid, accurate calculations of complex fluid flows. The paper discusses the application of neuralnetworks to the ca...
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Hypersonic aircraft require a high degree of system integration. Design tools are needed to provide rapid, accurate calculations of complex fluid flows. The paper discusses the application of neuralnetworks to the calculation of fluid flow and heat transfer in a heat exchanger panel for the National AeroSpace Plane (NASP).
The training speeds of Batch Backpropagation using steepest descent, Conjugate Gradient and Quasi-Newton algorithms for a feedforward neural network are compared. Results illustrating the advantages of the Hessian-bas...
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The training speeds of Batch Backpropagation using steepest descent, Conjugate Gradient and Quasi-Newton algorithms for a feedforward neural network are compared. Results illustrating the advantages of the Hessian-based techniques are given and issues affecting speed discussed.
The Local Model network extension to Basis Function networks is especially important for practical application of learning systems to real modelling problems. This is because of the architecture's representational...
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The Local Model network extension to Basis Function networks is especially important for practical application of learning systems to real modelling problems. This is because of the architecture's representational ability, as well as for its transparency and its compatibility with conventional modelling methods - the model is often already in a form which engineers can understand by using conventional analysis to examine individual local models.
The TACOMA (TAsk decomposition, COrrelation Measures and local Attention neurons) learning architecture is proposed for growing complex artificial neuralnetworks. The algorithm generates a feed forward network bottom...
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The TACOMA (TAsk decomposition, COrrelation Measures and local Attention neurons) learning architecture is proposed for growing complex artificial neuralnetworks. The algorithm generates a feed forward network bottom up by cyclically inserting cascaded hidden layers. Inputs of a hidden layer unit are locally restricted with respect to the input space by using a new kind of activation function, combining the local characteristics of radial basis function units with sigmoid units.
A primary proposal for the application of FuzzyArt Map to process control and a comparison using a classic PI controller have been carried out. The results obtained are clearly superior as far as the speed and exactne...
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A primary proposal for the application of FuzzyArt Map to process control and a comparison using a classic PI controller have been carried out. The results obtained are clearly superior as far as the speed and exactness of the time response are concerned, showing a stability improvement in critical situations and ample tolerance when faced with noisy estimations. For this reasons, the neural net can be used in control applications, acting as identification, estimation and control blocks.
Simulations performed demonstrated the following qualitative difference between the regular Backpropagation (BP) and the algorithm with averaging. The trajectory of the averaged estimates is `smoother' because it ...
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Simulations performed demonstrated the following qualitative difference between the regular Backpropagation (BP) and the algorithm with averaging. The trajectory of the averaged estimates is `smoother' because it takes prehistory into account by using arithmetic mean of preceding points. Also, the same reason makes the averaged estimates converge faster when in the neighborhood of the solution. On the other hand, utilization of nonoptimaly decreasing stepsize γn in the basic algorithm slows down attainability of the neighborhood by the method with averaging.
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