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An improved hyper-chaotic system based on the hyper-chaos generated
from Chen's system is presented, and some basic dynamical properties
of the system are investigated by means of Lyapunov exponent
spectrum, bifurcation diagrams and characteristic equation roots.
Simulations show that the new improved system evolves into
hyper-chaotic, chaotic, various quasi-periodic or periodic orbits
when one parameter of the system is fixed to be a certain value
while the other one is variable. Some computer simulations and
bifurcation analyses are given to testify the findings. 相似文献
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Generalized reduced-order synchronization of chaotic system based on fast slide mode 总被引:1,自引:0,他引:1
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A new kind of generalized reduced-order synchronization of different chaotic
systems is proposed in this paper. It is shown that dynamical evolution of
third-order oscillator can be synchronized with the canonical projection of
a fourth-order chaotic system generated through nonsingular states
transformation from a cell neural net chaotic system. In this sense, it is
said that generalized synchronization is achieved in reduced-order. The
synchronization discussed here expands the scope of reduced-order
synchronization studied in relevant literatures. In this way, we can achieve
generalized reduced-order synchronization between many famous chaotic
systems such as the second-order D\"{u}ffing system and the third-order
Lorenz system by designing a fast slide mode controller. Simulation results
are provided to verify the operation of the designed synchronization. 相似文献
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The design of an efficient one-way hash function with good performance is a hot spot in modern cryptography researches. In this paper, a hash function construction method based on cell neural network with hyper-chaos characteristics is proposed. First, the chaos sequence is gotten by iterating cellular neural network with Runge Kutta algorithm, and then the chaos sequence is iterated with the message. The hash code is obtained through the corre- sponding transform of the latter chaos sequence. Simulation and analysis demonstrate that the new method has the merit of convenience, high sensitivity to initial values, good hash performance, especially the strong stability. 相似文献
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A finite-time controller is designed for a class of nonlinear systems
subject to sector nonlinear inputs. A novel and simple approach is suggested
based on the finite-time control principle. The designed sliding-mode
controller
can drive a chaotic system to track a smooth target signal in a
finite time.
The chaotic Duffing--Holmes oscillator is used for verification and
demonstration. 相似文献
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给出了有限阶段R/M(再制造/制造)系统集成库存模式,利用马尔科夫决策理论对库存容量有限、具有随机再制造零部件的R/M系统集成库存进行研究,考虑再制造零部件单位成本、新零部件可变费用和固定费用、超过库存容量的那部分再制造零部件的附加费用及有缺货赔偿的情况,给出了马尔科夫决策过程模型,得到了随机最优控制策略. 相似文献
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一种基于小波系数动态量化的鲁棒数字水印算法 总被引:1,自引:0,他引:1
提出了一种改进的基于动态量化小波系数的鲁棒水印算法.水印通过动态量化嵌入到载体图像小波变换的高频子带上,混沌优化用于搜索嵌入水印的最大可用块数,中国剩余定理用于安全地产生动态量化参数.该算法和Lin等人提出的数字水印方案相比,不仅具有良好的隐蔽性、安全性和不可感知性,同时,算法也具有良好的抗压缩攻击等鲁棒性能.仿真结果验证了算法的有效性. 相似文献
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