Neural network based identification of hysteresis in human meridian systems

• Autorzy: Yonghong Tan , Ruili Dong , Hui Chen , Hong He
• Języki publikacji: EN

Abstrakty

EN

Developing a model based digital human meridian system is one of the interesting ways of understanding and improving acupuncture treatment, safety analysis for acupuncture operation, doctor training, or treatment scheme evaluation. In accomplishing this task, how to construct a proper model to describe the behavior of human meridian systems is one of the very important issues. From experiments, it has been found that the hysteresis phenomenon occurs in the relations between stimulation input and the corresponding response of meridian systems. Therefore, the modeling of hysteresis in a human meridian system is an unavoidable task for the construction of model based digital human meridian systems. As hysteresis is a nonsmooth, nonlinear and dynamic system with a multi-valued mapping, the conventional identification method is difficult to be employed to model its behavior directly. In this paper, a neural network based identification method of hysteresis occurring in human meridian systems is presented. In this modeling scheme, an expanded input space is constructed to transform the multi-valued mapping of hysteresis into a one-to-one mapping. For this purpose, a modified hysteretic operator is proposed to handle the extremum-missing problem. Then, based on the constructed expanded input space with the modified hysteretic operator, the so-called Extreme Learning Machine (ELM) neural network is utilized to model hysteresis inherent in human meridian systems. As hysteresis in meridian system is a dynamic system, a dynamic ELM neural network is developed. In the proposed dynamic ELM neural network, the output state of each hidden neuron is fed back to its own input to describe the dynamic behavior of hysteresis. The training of the recurrent ELM neural network is based on the least-squares algorithm with QR decomposition.

Słowa kluczowe

EN

acupuncture point; hysteresis; identification; neural networks; human meridian; traditional Chinese medicine

• Wydawca: University of Zielona Gora Press
• Czasopismo: International Journal of Applied Mathematics and Computer Science
• Rocznik: 2012
• Tom: 22
• Numer: 3
• Strony: 685-694

Daty

wydano

2012

otrzymano

2011-03-11

poprawiono

2011-11-24

poprawiono

2012-05-12

Twórcy

autor

Yonghong Tan

• College of Mechanical and Electronic Technology, Shanghai Normal University, #100 Guilin Road, Shanghai, 200234, China

autor

Ruili Dong

• College of Mechanical and Electronic Technology, Shanghai Normal University, #100 Guilin Road, Shanghai, 200234, China

autor

Hui Chen

• Department of Automation, Southeast University, #2 Si-Pai-Lou Street, Nanjing, 210096, Nanjing, China

autor

Hong He

• College of Mechanical and Electronic Technology, Shanghai Normal University, #100 Guilin Road, Shanghai, 200234, China

Bibliografia

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Identyfikatory

DOI

10.2478/v10006-012-0051-4