Abstract:The time delay signature (TDS) properties in ring network of three mutually coupled semiconductor lasers (MCSLs) are investigated quantitatively. The evolution pattern of TDS, which is quantified via the auto-correlation function, for ring network with identical coupling delays as well as with heterogeneous coupling delays are discussed and compared. The effects of coupling strength, frequency detuning and injection current are mainly examined. The parameter regions contributing to successful TDS concealment are identified. It is found that, three sets of chaotic signals with TDS concealment can be simultaneously generated in ring network of three MCSLs under certain condition, and the TDS is mainly affected by injection current and coupling strength, but is not so sensitive to the frequency detuning. To obtain low TDS, larger injection current and smaller coupling strength are desired. Besides, by intentionally introducing heterogeneous coupling delays in the ring network, the TDS can be better concealed in much wider parameter regions compared to the network with identical coupling delays, which is highly desirable for the chaos-based random bit generators.

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	1. Simultaneous generation of multiple time-delay-signature eliminated chaos in ring network of coupled semiconductor lasers with heterogeneous delays
	XIANG Shuiying,WEN Aijun,LIN Lin,ZHANG Huixing,ZHANG Hao,GUO Xingxing,LI Jiafu
	Information Science and System Science 17 March 2016
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	Abstract:The time delay signature (TDS) properties in ring network of three mutually coupled semiconductor lasers (MCSLs) are investigated quantitatively. The evolution pattern of TDS, which is quantified via the auto-correlation function, for ring network with identical coupling delays as well as with heterogeneous coupling delays are discussed and compared. The effects of coupling strength, frequency detuning and injection current are mainly examined. The parameter regions contributing to successful TDS concealment are identified. It is found that, three sets of chaotic signals with TDS concealment can be simultaneously generated in ring network of three MCSLs under certain condition, and the TDS is mainly affected by injection current and coupling strength, but is not so sensitive to the frequency detuning. To obtain low TDS, larger injection current and smaller coupling strength are desired. Besides, by intentionally introducing heterogeneous coupling delays in the ring network, the TDS can be better concealed in much wider parameter regions compared to the network with identical coupling delays, which is highly desirable for the chaos-based random bit generators.
	TO cite this article:XIANG Shuiying,WEN Aijun,LIN Lin, et al. Simultaneous generation of multiple time-delay-signature eliminated chaos in ring network of coupled semiconductor lasers with heterogeneous delays[OL].[17 March 2016] http://en.paper.edu.cn/en_releasepaper/content/4681167


	2. Associative Memory via Memristive Neural Networks
	ZENG Zhigang,WEN Shiping
	Information Science and System Science 22 January 2014
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	Abstract:This paper investigates associative memory based on memristive neural networks. Based on the reproducible gradual resistance tuning in bipolar mode, a first-order voltage-controlled memristive model is employed with asymmetric voltage thresholds. Since memrisive devices are especially tiny to be densely packed in crossbar-like structures and possess long time memory needed by neuromorphic synapses, this paper shows how to approximate the behavior of synapses in neural networks using this memristive device. Certain neural networks are established and applied in associative memory.
	TO cite this article:ZENG Zhigang,WEN Shiping. Associative Memory via Memristive Neural Networks[OL].[22 January 2014] http://en.paper.edu.cn/en_releasepaper/content/4582391

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	3. Impulsive stabilization of a class of nonlinear system with bounded gain error
	MA Tiedong,ZHAO Feiya
	Information Science and System Science 24 December 2013
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	Abstract:This paper introduces impulsive gain error result from mechanical limitation or device restriction in practical application. Our new impulsive control method includes control gain error with an acceptable boundary is more practically applicable than previous existing impulsive analytical approaches. A sufficient criterion for global exponential stability of impulsive control system is derived without the need for precise impulsive gain by estimating impulsive differential inequality. The effectiveness of the proposed method is confirmed by theoretical analysis and numerical simulation.
	TO cite this article:MA Tiedong,ZHAO Feiya. Impulsive stabilization of a class of nonlinear system with bounded gain error[OL].[24 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4576685


	4. Robust Hybrid Projective Synchronization of Fractional-Order Chaotic Systems with Time-Delay
	MA Tiedong,XI Quan
	Information Science and System Science 16 December 2013
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	Abstract:The hybrid projective synchronization for fractional-order chaotic systems with time-delay and uncertain perturbation is investigated in this paper. Adaptive sliding mode control method is proposed to synchronize the fractional-order chaotic and hyperchaotic systems under time-delay and uncertain perturbation. Stability is analyzed by using stability theorem of fractional calculus. The simulation results show the feasibility and effectiveness of the proposed scheme.
	TO cite this article:MA Tiedong,XI Quan. Robust Hybrid Projective Synchronization of Fractional-Order Chaotic Systems with Time-Delay[OL].[16 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4575776


	5. Circuit simulation and implementation for synchronization between fractional-order modified Liu chaotic systems
	MA Tiedong,GUO Dong
	Information Science and System Science 28 October 2013
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	Abstract:For a novel modified fractional-order Liu chaotic system, this paper studies the circuit simulation for this system and its synchronization. Based on the approximation theory of fractional-order operator, an electronic circuit is designed to describe the dynamic behavior of the modified fractional-order system firstly, and then the synchronization between two identical fractional-order Liu systems is designed by given circuit. Our results are supported by numerical simulation and circuit implementation.
	TO cite this article:MA Tiedong,GUO Dong. Circuit simulation and implementation for synchronization between fractional-order modified Liu chaotic systems[OL].[28 October 2013] http://en.paper.edu.cn/en_releasepaper/content/4565866


	6. A Novel Stream Encryption Scheme with Avalanche Effect
	MIN Le-Quan,CHEN Guan-Rong
	Information Science and System Science 21 January 2013
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	Abstract:The strict key avalanche effect requires that whenever any bit of the key is changed , theciphertext should have a change with the probability ofone-half. This paper proposes a novel stream encryption scheme withavalanche effect. Using this scheme and an ideal pseudorandom numbergenerator (PRNG) to generate $d$-bit segment binary key streams, onecan encrypt a plaintext such that by using any key stream generatedfrom a different seed to decrypt the ciphertext, the decryptedplaintext will become an avalanche-like text which has 2d- 1 consecutive one's with a high probability. A correspondingavalanche-type encryption theorem is established.As an application, two chaotic PRNGs are designed based on adiscrete Chua circuit and a discrete Chen equation. FIPS 140-2 testson the two PRNGs show that the generated key streams have soundrandomness. SESAE is then used with key streams generated by the twoPRNGs, RC4 PRNG and Matlab PRNG, to encrypt and decrypt two RGBimages, respectively. Results show that the encrypted images haveavalanche effects similar to the ideal d-bit segment binary PRNG,which is not achieved by the images encrypted using the Matlab PRNG.
	TO cite this article:MIN Le-Quan,CHEN Guan-Rong. A Novel Stream Encryption Scheme with Avalanche Effect[OL].[21 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4514960


	7. Optimization-based Structure Identification of Complex Dynamical Networks
	He Tao ,Lv Xiliang ,Wu Xiaoqun,Lu Junan ,Zheng Weixing
	Information Science and System Science 08 April 2012
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	Abstract:The topological structure of a complex network plays a pivotal part in itsproperties, dynamics and control. Thus, understanding and modeling thestructure of a complex network will lead to a better knowledge of itsevolutionary mechanisms and to a better cottoning on its dynamical andfunctional behaviors. However, in many practical situations, thetopological structure of a complex network is usually unknown or uncertain.Thus, exploring the underlying topological structure of a complex networkis of great value. In recent years, there has been a growing interest instructure identification of complex dynamical networks. As a result, variousmethods for identifying the network structure have been proposed. However,in most of the previous work, few of them were discussed in the perspectiveof optimization. In this paper, an optimization algorithm based on theprojected conjugate gradient method is proposed to identify a networkstructure. It is straightforward and applicable to networks with or withoutobservation noise. Furthermore, the proposed algorithm is also applicable tocomplex networks with partially observed component variables for eachmultidimensional node. Numerical experiments are conducted to illustrate thegood performance and universality of the new algorithm.
	TO cite this article:He Tao ,Lv Xiliang ,Wu Xiaoqun, et al. Optimization-based Structure Identification of Complex Dynamical Networks[OL].[ 8 April 2012] http://en.paper.edu.cn/en_releasepaper/content/4474570


	8. $1/f^{alpha}$ noise in spectral fluctuations of complex networks
	Ye Bin
	Information Science and System Science 29 March 2010
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	Abstract:$1/f^{alpha}$-noise or $1/f^{alpha}$-phenomenon is widely considered as the signature of complexity. We demonstrate the existence of this phenomenon in various model networks, namely random, small-world, scale-free complex networks. Taking the eigenvalues of the adjacency matrix as a discrete time series, the Fourier power spectrum of the fluctuations of these eigenvalues are analyzed in terms of their frequency. An approximately $1/f^{2}$ type power-law behavior is found in these model networks. We also present our analysis for the real-world interconnected electrical power grid. Our present work provides a new perspective to understand the complex network structures.
	TO cite this article:Ye Bin. $1/f^{alpha}$ noise in spectral fluctuations of complex networks[OL].[29 March 2010] http://en.paper.edu.cn/en_releasepaper/content/41270


	9. On Multifractal Spectrum of Hidden Markov Processes
	Shuangping Chen
	Information Science and System Science 05 January 2010
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	Abstract:The hidden Markov processes (HMP) have been shown to be related to Cantor set which is a typical fractal. Statistical methods have been introduced to compute the multifractal spectrum of HMPs, and an example of applying the methods on a binary hidden Markov process was provided. The multifractal spectrum is a very useful tool for evaluating parameters and output of HMPs.
	TO cite this article:Shuangping Chen. On Multifractal Spectrum of Hidden Markov Processes[OL].[ 5 January 2010] http://en.paper.edu.cn/en_releasepaper/content/38447


	10. A new multistage chaos synchronized system for secure communications
	AN Xinlei,Yu JianNing,Zhang JianGang,ZHANG Li
	Information Science and System Science 12 March 2009
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	Abstract:Based on Lyapunov stabilization theorem, considering the diffusionless chaotic system, a method is proposed for global chaos synchronization among three identical systems. Meanwhile, the method of three different structures chaotic systems global synchronization is shown. Then this method is applied to secure communication through chaotic masking, used three coupled identical system, propose a novel method of chaos encryption, after encrypting in the first two coupled systems, do it again in the later two coupled systems. Simulation results show that the method can realize monotonous synchronization. Further more, the information signal can be recovered undistorted when applying this method to secure communication.
	TO cite this article:AN Xinlei,Yu JianNing,Zhang JianGang, et al. A new multistage chaos synchronized system for secure communications[OL].[12 March 2009] http://en.paper.edu.cn/en_releasepaper/content/30178

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