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Chaotic dynamics theory provides an analytical method for securities price in a stock. In this paper the Shanghai Composite Index is selected to analyze the nonlinear characteristics of price fluctuations. Through processing the data with the logarithmic-eliminating trend method, the chaotic attractor of Shanghai Stock Index is computed. The results show that Chinese securities market is an obvious...
There are lots of multimedia data files in the network, which have their own features separated from text files. Combing with the good characteristics, such as stronger pseudo-randomness, of hyperchaotic, a new kind of image survivable storage scheme is proposed. The scheme can be proved that it can realized the security and the disater recovery of the stored image. In addition, some optimization...
In this paper, the finite-time stable control problem for the chaotic system of permanent magnet synchronous motor is studied. An active control method with dynamic active compensation is proposed, which makes the closed-loop system achieve approximately finite-time stable control. And a new observer is designed to solve the uncertainty. The approximate finite-time stability of the closed-loop system...
Roll eccentricity is one of the most important factors that affect the quality of the steel plate and strip products. In this paper, Mill eccentric model is established and analyzed. New idea that is proposed that roll eccentricity disturbance on gauge is chaotic during rolling. Fuzzy controller is used to control the chaotic system. A new variable universe fuzzy controller based on improved ant colony...
This paper presents a new parallel chaos optimization algorithm with the number of variables reduced. The idea of this algorithm is to use several chaos variables to search in the search space at first. Then reduce the common search space of all chaos variables according to search results and reduce the number of chaos variables according to the size the common search space reduced. After that, continue...
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