scholarly journals Solar power integration, neural network, spinning reserve, Improved-Levenberg-Marquardt (ILM) algorithm

2019 ◽  
Keyword(s):  
Neural Network ◽  
Solar Power ◽  
Spinning Reserve ◽  
Levenberg Marquardt

Comparison of an Artificial Neural Network and a Multiple Linear Regression in Predicting the Heat of Combustion of Diesel Fuel Based on Hydrocarbon Groups

2020 ◽  
Vol 71 (6) ◽  
pp. 66-74
Author(s):  
Younis M. Younis ◽  
Salman H. Abbas ◽  
Farqad T. Najim ◽  
Firas Hashim Kamar ◽  
Gheorghe Nechifor
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Diesel Fuel ◽  
Back Propagation ◽  
Second Step ◽  
Heating Value ◽  
Network Training ◽  
Marquardt Algorithm ◽  
Levenberg Marquardt ◽  
Propagation Network

A comparison between artificial neural network (ANN) and multiple linear regression (MLR) models was employed to predict the heat of combustion, and the gross and net heat values, of a diesel fuel engine, based on the chemical composition of the diesel fuel. One hundred and fifty samples of Iraqi diesel provided data from chromatographic analysis. Eight parameters were applied as inputs in order to predict the gross and net heat combustion of the diesel fuel. A trial-and-error method was used to determine the shape of the individual ANN. The results showed that the prediction accuracy of the ANN model was greater than that of the MLR model in predicting the gross heat value. The best neural network for predicting the gross heating value was a back-propagation network (8-8-1), using the Levenberg�Marquardt algorithm for the second step of network training. R = 0.98502 for the test data. In the same way, the best neural network for predicting the net heating value was a back-propagation network (8-5-1), using the Levenberg�Marquardt algorithm for the second step of network training. R = 0.95112 for the test data.

Predicting Seepage of Earth Dams Using Neural Network and Genetic Algorithm

2011 ◽  
Vol 403-408 ◽  
pp. 3081-3085 ◽  
Author(s):  
Xin Ying Miao ◽  
Jin Kui Chu ◽  
Jing Qiao ◽  
Ling Han Zhang
Keyword(s):  
Neural Network ◽  
Genetic Algorithm ◽  
Field Data ◽  
Back Propagation ◽  
Earth Dam ◽  
Earth Dams ◽  
Gradient Descent Algorithm ◽  
Levenberg Marquardt ◽  
Lm Algorithm ◽  
Good Agreement

Measurements of seepage are fundamental for earth dam surveillance. However, it is difficult to establish an effective and practical dam seepage prediction model due to the nonlinearity between seepage and its influencing factors. Genetic Algorithm for Levenberg-Marquardt(GA-LM), a new neural network(NN) model has been developed for predicting the seepage of an earth dam in China using 381 databases of field data (of which 366 in 2008 were used for training and 15 in 2009 for testing). Genetic algorithm(GA) is an ecological system algorithm, which was adopted to optimize the NN structure. Levenberg-Marquardt (LM) algorithm was originally designed to serve as an intermediate optimization algorithm between the Gauss-Newton(GN) method and the gradient descent algorithm, which was used to train NN. The predicted seepage values using GA-LM model are in good agreement with the field data. It is demonstrated here that the model is capable of predicting the seepage of earth dams accurately. The performance of GA-LM has been compared with that of conventional Back-Propagation(BP) algorithm and LM algorithm with trial-and-error approach. The comparison indicates that the GA-LM model can offer stronger and better performance than conventional NNs when used as a quick interpolation and extrapolation tool.

scholarly journals KOMPARASI LEVENBERG-MARQUARDT (LM) DENGAN BROYDEN, FLETCHER, GOLDFARB, AND SHANNO QUASI-NEWTON (BFGS) BPNN UNTUK DIIMPLEMENTASIKAN PADA DATA KECEPATAN ANGIN

2017 ◽  
Vol 8 (2) ◽  
pp. 90
Author(s):  
HAJI SIRAJUDDIN
Keyword(s):  
Neural Network ◽  
Backpropagation Neural Network ◽  
Levenberg Marquardt ◽  
Quasi Newton

Penelitian ini dilakukan untuk mengkomparasi Levenberg-Marquardt (Lm) Dengan Broyden, Fletcher, Goldfarb, And Shanno Quasi-Newton (Bfgs)  pada Penerapan Backpropagation Neural Network (BPNN) untuk memprediksi data Kecepatan Angin rata-rata. Data yang digunakan pada penelitian ini adalah data kecepatan angin rata-rata harian pada bulan Januari 2010 sampai Desember 2014 di Banjarbaru, Kalimantan selatan . Kecepatan angin ditentukan oleh perbedaan tekanan udara antara tempat asal dan tujuan angin dan daerah yang dilaluinya, Prediksi salah satu teknik yang paling penting dalam mengetahui kecepatan angin yang dihasilkan. Hasil Komparasi analisis Levenberg-Marquardt (Lm) Dengan Broyden, Fletcher, Goldfarb, And Shanno Quasi-Newton (Bfgs)   menunjukkan bahwa Pada penelitian ini hasil terbaik yang didapatkan menggunakan Levenberg Marquardt (trainlm) dengan akurasi sebesar 95,93%, setelah dibandingkan dengan performance maksimum dari algoritma BPNN yang lain. model BPNN merupakan metode terbaik yang digunakan untuk prediksi kecepatan angin rata-rata harian dengan nilai RMSE sebesar 1,3378.Kata kunci : Kecepatan Angin, Backpropagation Neural Network, Broyden, Fletcher, Goldfarb, And Shanno Quasi-Newton , Levenberg-Marquardt

scholarly journals Solving Mixed Volterra - Fredholm Integral Equation (MVFIE) by Designing Neural Network

2019 ◽  
Vol 16 (1) ◽  
pp. 0116
Author(s):  
Al-Saif Et al.
Keyword(s):  
Neural Network ◽  
Integral Equation ◽  
Analytic Solution ◽  
Fredholm Integral Equations ◽  
Training Algorithm ◽  
Output Unit ◽  
Feed Forward Neural Network ◽  
Levenberg Marquardt ◽  
Hidden Layer ◽  
And Training

       In this paper, we focus on designing feed forward neural network (FFNN) for solving Mixed Volterra – Fredholm Integral Equations (MVFIEs) of second kind in 2–dimensions. in our method, we present a multi – layers model consisting of a hidden layer which has five hidden units (neurons) and one linear output unit. Transfer function (Log – sigmoid) and training algorithm (Levenberg – Marquardt) are used as a sigmoid activation of each unit. A comparison between the results of numerical experiment and the analytic solution of some examples has been carried out in order to justify the efficiency and the accuracy of our method.                                  

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