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According to chaotic characteristics, a method for studying on chaos by using Poincare sections is proposed. The method can study on sensitivity to parameters and initial conditions for chaotic system. A lot of experiments based on Chua's chaotic circuit have been done. The simulation results demonstrate the effectiveness of this method.
This poster records the various methods historically used to accurately calculate the Schottky-Nordheim barrier functions used in tunnelling theory. This can now be done via a spreadsheet. Electronic copies of a suitable spreadsheet can be made available. This extended abstract also contains some underlying basic theory.
In 2009, J. Li and P. Jiang proposed a provably secure identity-based signature scheme using bilinear pairings, which is claimed secure in the standard model. However, we present that any attacker can forge the private key of an identity or a signature if the second part of an identity's private key is not certificated by the Private Key Generator (PKG). Therefore, the signature-based binding of the...
Frequency estimation is a useful technology for analyzing oscillatory phenomena. In these days, there is a demand for rapid and highly accurate frequency estimator. Though various frequency estimation methods have been proposed, most of them can not respond to the demand. An algebraic approach is succeeded in achieving the demand but it requires a lot of multiple integrations due to eliminating differential...
Aiming at improving the efficiency of the objects ranking in ordered information system, the problem of sorting is researched in this paper. Then a novel framework based on rough set theory is proposed, the key idea of which is compressing the original data by attribute and value reduction. In the new approach the information table is simplified firstly by rough set theory after transforming an ordered...
The essence and process of attribute value reduction is analyzed from the view of logic. Then a new algorithm for attribute value reduction based on rough set is proposed by constructing a discernible matrix and the correctness and feasibility is proved. In addition, the experiment shows that the algorithm is effective and it is easy to be realized by programming. Not only it can get more concise...
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