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›› 2002, Vol. 2 ›› Issue (3): 0-0.

• 3 •    

DOBD Algorithm for Training Neural Network: Part II. Application

WU Jian-yu(吴建昱),HE Xiao-rong(何小荣)   

  1. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • 出版日期:2002-06-20 发布日期:2002-06-20

Enzymatic Kinetics of Immobilized L-aminoacylase and Its Continuous Resolution of DL-methionine

WANG Shu-hao, LI Xiao-feng, WU Yan-ling, SONG Zheng-xiao, MA Zhong-hai, YUAN Ying-jin   

  1. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • Online:2002-06-20 Published:2002-06-20

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摘要： In the first part of the article, a new algorithm for pruning networkDynamic Optimal Brain Damage(DOBD) is introduced. In this part, two cases and an industrial application are worked out to test the new algorithm. It is verified that the algorithm can obtain good generalization through deleting weight parameters with low sensitivities dynamically and get better result than the Marquardt algorithm or the cross-validation method. Although the initial construction of network may be different, the finial number of free weights pruned by the DOBD algorithm is similar and the number is just close to the optimal number of free weights. The algorithm is also helpful to design the optimal structure of network.

关键词: neural network, DOBD algorithm, Marquardt method, overfitting, pruning, training, application

Abstract: In the first part of the article,a new algorithm for pruning network Dynamic Optimal Brain Damage(DOBD) is introduced. In this part, two cases and an industrial application are worked out to test the new algorithm. It is verified that the algorithm can obtain good generalization through deleting weight parameters with low sensitivities dynamically and get better result than the Marquardt algorithm or the cross-validation method. Although the initial construction of network may be different, the finial number of free weights pruned by the DOBD algorithm is similar and the number is just close to the optimal number of free weights.The algorithm is also helpful to design the optimal structure of network.

Key words: immobilized, Aspergillus oryzae, L-aminoacylase, kinetics, resolution, L-methionine

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