Parameter-tuning Networks: Experiments and Active Walk Model

Details Parameter-tuning Networks: Experiments and Active Walk Model Parameter-tuning Networks: Experiments and Active Walk Model

2008-01-18

arxiv.org/abs/0801.2802v2

Published at Europhys. Lett. 83 (2008) 28003

Physics

Plasma Physics

4 pages, 5 figures

Scientific paper

10.1209/0295-5075/83/28003

The 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 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 way and a new insight to understand the action of humans in the parameter-tuning of experimental processes, is helpful for experimental research and other optimization problems.

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