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A fractional-order control method is obtained to stabilize the point in chaos attractor of integer orders chaos systems. The control law has simple structure and is designed easily. Two examples are also given to illustrate the effectiveness of the theoretical result.

A survey and review of recent patents on electrochemical methods for corrosion monitoring from 1999 to 2009 are presented in this paper. The patents were classified into 4 groups according to different electrochemical theories, which are potential, polarization, electrochemical impedance and electrochemical noise. A future outlook of the development on new research aspects particularly on methods based on electrochemistry is prospected.

As a kind of environmentally friendly corrosion inhibitor, the extract from pomelo peel was evaluated for C38 carbon steel in 1 M HCl solution. The corrosion inhibiting performances of the extract from pomelo peel was confirmed using electrochemical method, weight loss measurement and scanning electron microscope (SEM) observation in the temperature range between 298 and 328 K. The inhibition efficiency was found to increase with the concentration of the extract from pomelo peel. Electrochemical impedance spectroscopy (EIS) measurement indicated that the corrosion process of the steel was inhibited by the adsorption of the extract from pomelo peel, following a Langmuir-type isotherm.

Based on the idea of tracking control and the stability theory of linear fractional-order system, chaotic synchronization between fractional-order chaotic system and chaotic system of integer orders is proposed. A compensation controller and a feedback controller are given. Synchronization between the fractional-order Chen chaotic system and the Loren chaotic system of integer orders is used to illustrate the effectiveness of the proposed synchronization approach. Numerical and circuit simulations coincide with the theoretical analysis.

Synchronization between fractional-order chaotic systems and integer orders chaotic systems (fractional-order chaotic systems) *Zhou Ping(周 平) a)b) † , Cheng Yuan-Ming(程元明) b) , and Kuang Fei(邝 菲) b)