Modelling of Rolling and Aging Processes in Copper Alloy by Levenberg-Marquardt BP Algorithm

2005 ◽  
pp. 185-189 ◽  
Author(s):  
Juanhua Su ◽  
Hejun Li ◽  
Qiming Dong ◽  
Ping Liu
Keyword(s):  
Copper Alloy ◽  
Bp Algorithm ◽  
Levenberg Marquardt

Prediction of Oilfield Cementing Quality Based on Levenberg-Marquardt BP Algorithm

2011 ◽  
Vol 217-218 ◽  
pp. 1032-1035
Author(s):  
Yu Xue Wang ◽  
Shao Hua Zhou
Keyword(s):  
Neural Network ◽  
Bp Neural Network ◽  
Bp Algorithm ◽  
Levenberg Marquardt ◽  
Lm Algorithm ◽  
Improved Algorithm

In this paper an improved algorithm of BP neural network --- Levenberg-Marquardt (LM) algorithm is introduced, and the simulation predictions of oilfield cementing quality is done by using this method. Finally, a practical example verified the feasibility of the presented method.

Research on the Prediction of Drug Sales Based on Levenberg-Marquardt Algorithm

2012 ◽  
Vol 198-199 ◽  
pp. 1452-1456 ◽  
Author(s):  
Xue Feng Jiang
Keyword(s):  
Neural Network ◽  
Prediction Model ◽  
Production Planning ◽  
Bp Neural Network ◽  
Bp Algorithm ◽  
Experimental Results ◽  
Drug Production ◽  
Drug Sales ◽  
Marquardt Algorithm ◽  
Levenberg Marquardt

Prediction of drug sales trend is very important for the drug production planning and inventory. The paper studies the BP neural network and presents a kind of method based on reformative neural network to solve the issue of prediction of drug sales. Compare with traditional BP algorithm, the result reveals that this algorithm has structure rationalization and rapid constringency velocity. The experimental results demonstrate that the prediction model based on Levenberg_Marquardt algorithm is good at predicting drug sales.

Determining whiskering properties of tin-copper alloy solder-dipped platings

2010 ◽  
Vol 54 (3-4) ◽  
pp. 107
Author(s):  
Barbara Horváth ◽  
Balázs Illés ◽  
Tadashi Shinohara ◽  
Gábor Harsányi
Keyword(s):  
Copper Alloy ◽  
Alloy Solder

A Romanesque crucifix from Macewen's Castle, Loch Fyne, Mid Argyll

1989 ◽  
Vol 16 (1) ◽  
pp. 81-84
Author(s):  
J. G. Scott
Keyword(s):  
Copper Alloy ◽  
12Th Century ◽  
Made In

Summary This copper alloy crucifix was found during excavation at Macewen's Castle in Argyll in 1968 and closely resembles others known to date from the 12th century; it may have been made in Belgium. The arms could have been bent back to aid concealment in the 17th or 18th centuries.

Between Centre and Periphery: Early Egyptian and Nubian Copper Alloy Artefacts in the Collection of the Kunsthistorisches Museum Vienna (KHM)

2018 ◽  
Vol 28 ◽  
pp. 419-456
Author(s):  
Martin Odler ◽  
Katharina Uhlir ◽  
Marie Jentsch ◽  
Martina Griesser ◽  
Regina Hölzl ◽  
...  
Keyword(s):  
Copper Alloy

Balanço de radiação utilizando métodos de estimativa da radiação solar em cultivo de cana-de-açúcar

Agrometeoros ◽  
2020 ◽  
Vol 27 (1) ◽  
Author(s):  
Joana Madeira Krieger ◽  
Isabella Siqueira Vieira ◽  
Wellerson De Oliveira Alves da Silva ◽  
José Leonaldo Souza ◽  
Guilherme Bastos Lyra ◽  
...  
Keyword(s):  
Levenberg Marquardt

 Devido à dificuldade de medidas contínuas e de qualidades das componentes do balanço de radiação, existe a necessidade de desenvolver modelos para estimá-las. Este trabalho ajustou os coeficientes dos métodos de Hargreaves-Samani (HaS) e Bristow-Campbell (BrC) para estimava da radiação solar global (Rs), assim como o albedo (α) e os coeficientes de um modelo de balanço de ondas longas (Rnl) em cultivo de cana-de açúcar na região de Rio Largo/AL. Medições das componentes do balanço (Rn) de radiação foram realizadas no período de 03 a 27/06/2006 por um saldo radiômetro. Os coeficientes foram ajustados por meio de técnicas de problemas inversos (Levenberg-Marquardt). Após o ajuste, os modelos de balanço de ondas curtas (Rns), Rnl e Rn obtidos em função de Rs estimado por HaS e BrC foram comparados com observações dessas componentes. O método de BrC ajustado (β0 = 0,478, β1 = 0,016 e β2 = 2,78) teve maior precisão e exatidão que o método de HaS (kt = 0,172). Os métodos de Rs ajustados quando usados na estimava de Rns, Rnl e Rn tiveram estimativas acuradas. Os erros dos modelos quando usados Rs estimados por HaS e BrC foram em sua maioria, repasse dos erros obtidos na estimativa de Rs. Entretanto, os erros dos modelos, principalmente do Rnl, têm baixo impacto no Rn.

Sign in / Sign up

Export Citation Format

Share Document