Xiao-Pu Han et al 2008 EPL 83 28003 doi:10.1209/0295-5075/83/28003
Xiao-Pu Han1, Chun-Dong Hu2, Zhi-Min Liu2 and Bing-Hong Wang1,3
Show affiliationsThe tuning process of a large apparatus of many components could be represented and quantified by constructing parameter-tuning networks. The experimental tuning of the ion source of the neutral beam injector of the HT-7 Tokamak is presented as an example. Stretched-exponential cumulative degree distributions are found in the parameter-tuning networks. An active-walk model with eight walkers is constructed. Each active walker is a particle moving with friction in an energy landscape; the landscape is modified by the collective action of all the walkers. Numerical simulations show that the parameter-tuning networks generated by the model also give stretched exponential functions, in good agreement with experiments. Our methods provide a new insight to understand the action of humans in the parameter-tuning of experimental processes, and our model could be helpful for the experimental research and other optimization problems.
Issue 2 (July 2008)
Received 23 March 2008, accepted for publication 2 June 2008
Published 2 July 2008
Xiao-Pu Han et al 2008 EPL 83 28003
T. Das and S. Chakraborty 2008 EPL 83 48003
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