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2011 International Conference on Advanced Materials and Computer Science(ICAMCS 2011)

作者： Han Fengying Zhu Congxu Liu Changsheng Changsha Aeronautical Vocational and Technical College Information Science and Engineering College South Central University

A compound chaos encryption algorithm for digital images is designed in this paper. Lorenz Chaotic system and Logistics map are linked in cascade to generate chaos sequences. Then the permutation matrix is constructed to encrypt the digital image. The new algorithm can expand the key space and improve anti-aggressive ability. Matlab7.0 is used for simulation testing of the image encryption. Experimental results show that the algorithm is feasible and it can satisfy the security requirement for image transmission and storage. The compound chaos algorithm can be also used for color digital image encryption.

关键词： Encryption Scheme Digital Image chaos algorithm

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Resource Scheduling Simulation Design of Firefly algorithm Based on chaos Optimization in Cloud Computing

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INTERNATIONAL JOURNAL OF GRID AND DISTRIBUTED COMPUTING 2014年第6期7卷 221-228页

作者： Miao, Yue China West Normal Univ Sch Comp Nanchong 637002 Sichuan Peoples R China

The problem of resources under the environment of cloud computing has always been the focus of research. In this paper;the Artificial Firefly algorithm is studied, on the basis of which the chaos algorithm is introduced to improve the algorithm with regard to the problem of the subsequent search and optimization precision deficiency cause by the lack of initialization of firefly position in the firefly algorithm. Meanwhile, the updating of luciferin is improved. The improved algorithm is enhanced greatly in accuracy and performance. Through the simulation platform Cloudsim, it is found that under the cloud computing model, the algorithm presented in this paper can effectively reduce the average time spent by subtasks in processing request tasks, and thus improve the efficiency of task processing and achieve a rational allocation of resources.

关键词： Artificial Firefly algorithm cloud computing resource allocation chaos algorithm

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Research of Resource Allocation in Cloud Computing Based on Improved Dual Bee Colony algorithm

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INTERNATIONAL JOURNAL OF GRID AND DISTRIBUTED COMPUTING 2015年第5期8卷 117-125页

作者： Wu Ju-Hua Xinxiang Univ Comp & Informat Engn Coll Xinxiang 453000 Henan Peoples R China

The allocation of resources in cloud computing has always been the focus of research, and as for how to improve the implementation speed, response time and utilization rate of system, a resource allocation scheduling optimization method in cloud computing based on improved double bee colony algorithm is proposed in this paper To introduce difference algorithm in artificial ant colony and improve its double bee colony can avoid the bee colony to fall into local optimum, while by introducing chaos algorithm, the convergence speed and precision of the optimal solution in the improved algorithm can be accelerated and the best resources in clouding computing can be found quickly to a certain extent. The simulation experiments show that the algorithm in this paper has improved the algorithm performance efficiently, which not only optimizes the resource allocation ability in cloud computing system, but also improves the resource utilization rate in cloud computing.

关键词： Resource Allocation in Cloud Computing Double Bee Colony chaos algorithm Difference algorithm

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Data Acquisition and Pretreatment of Gastric Magnetic Signal Based on the Giant Magneto Impedance Effect

Data Acquisition and Pretreatment of Gastric Magnetic Signal...

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2015 International Conference on Computer Information Systems and Industrial Applications(CISIA2015)

作者： A.N.Wang Z.B.Yu C.Zhang Z.J.Huang College of Information Science and Engineering Northeastern University

ISBN: (纸本)9781510805750

Surface gastric electromagnetic signal is an important basis for the study of gastrointestinal *** electrode method can only collects the gastric slow wave which is the characterization of gastric contraction *** it can collect the gastric electrical fast signal which is the characterization of the contraction strength of *** the fat layer has the filtering effect on gastric electric *** the permeability of the fat layer is approximate to 1,the feature of gastric electrical fast wave can be acquired by measuring the gastric magnetic *** solve this problem,this paper puts forward a method of using the sensor base on the giant magneto impedance effect(GMI) to measure the gastric magnetic *** use GMI sensor,and design a gastric magnetic signal collection system,according to the actual data analysis of the noise sources,and put forward gastric magnetic signal de-noising algorithms based on wavelet analysis and chaos theory to remove the corresponding noise,which provides the basis for the extraction of gastric electrical fast wave signal.

关键词： GMI gastric electromagnetic signal labview chaos algorithm

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Optimization of Hydropower Reservoir Using Evolutionary algorithms Coupled with chaos

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WATER RESOURCES MANAGEMENT 2013年第7期27卷 1963-1979页

作者： Jothiprakash, V. Arunkumar, R. Indian Inst Technol Dept Civil Engn Mumbai 400076 Maharashtra India

Over the past decade, several conventional optimization techniques had been developed for the optimization of complex water resources system. To overcome some of the drawbacks of conventional techniques, soft computing techniques were developed based on the principles of natural evolution. The major difference between the conventional optimization techniques and soft computing is that in the former case, the optimal solution is derived where as in the soft computing techniques, it is searched from a randomly generated population of possible solutions. The results of the evolutionary algorithm mainly depend on the randomly generated initial population that is arrived based on the probabilistic theory. Recent research findings proved that most of the water resources variables exhibit chaotic behavior, which is a projection depends upon the initial condition. In the present study, the chaos algorithm is coupled with evolutionary optimization algorithms such as genetic algorithm (GA) and differential evolution (DE) algorithm for generating the initial population and applied for maximizing the hydropower production from a reservoir. The results are then compared with conventional genetic algorithm and differential evolution algorithm. The results show that the chaotic differential evolution (CDE) algorithm performs better than other techniques in terms of total annual power production. This study also shows that the chaos algorithm has enriched the search of general optimization algorithm and thus may be used for optimizing complex non-linear water resources systems.

关键词： chaos algorithm Differential evolution algorithm Genetic algorithm Optimization Hydropower system

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Optimal Coordination of Multiple ESS-based Stabilizers and PSS in Multi-machine Power System for Damping Improvement

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IFAC Proceedings Volumes 2014年第3期47卷 7284-7289页

作者： Linjun Shi Jiajia Zhou Lei Zhang Kwang Y. Lee College of Energy and Electrical Engineering HoHai University Nanjing 210098 China (Tel: 086-*** Jiangsu Electric Power Company Nanjing 210024 China Department of Electrical & Computer Engineering Baylor University Waco TX USA (Tel: (254) 710-4188

This paper proposes to optimally coordinate multiple Energy Storage System (ESS) based stabilizers and Power System Stabilizers (PSS) to increase damping in a multi-machine power system using an improved particle swarm optimization (IPSO). The IPSO has the strong and global searching ability and high efficiency by applying chaos initialization and simulated annealing (SA) algorithm in iteration. All eigenvalues, including both electromechanical and non-electromechanical modes, that meet the stability requirements in a wide range of operating conditions have been included in the objective function. In the 4-machine power system, the power system oscillations are effectively suppressed at different operating conditions by multiple ESS-based stabilizers and PSSs coordinated by IPSO, where the damping effect is better with the stabilizers designed by the IPSO than with the stabilizers tuned individually by the conventional compensation method. The results show the validity, robustness and superiority of the IPSO design.

关键词： Power system oscillation stability Energy Storage System (ESS) Power System Stabilizer (PSS) Particle Swarm Optimization (PSO) chaos algorithm Simulated Annealing (SA) algorithm

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Discussion of chaos algorithm apply in RFID authentication protocol

Discussion of Chaos Algorithm apply in RFID authentication p...

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International Conference on Computer and Communications Security

作者： Li Heng Gao Fei Xue Yanming Feng Shuo Beijing Inst Technol Informat & Electron Coll Beijing 100081 Peoples R China

ISBN: (纸本)9780769539065

Enhancement and promotion of RFID technology, making RFID a growing range of application areas, for cost and technical considerations, the current RFID system, the security of information transmitted under consideration, for people to develop a variety of authentication protocol, for information security to a certain extent improved However, the current authentication protocols are still some gaps, so we are considering the introduction of the existing authentication protocol chaotic algorithm, the plaintext information transmitted encrypted, thus increasing the RFID system's information security.

关键词： RFID security authentication protocol chaos algorithm

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Study on Wavelet Transform Digital Watermaking Technology with Improved an Chaotic algorithm

Study on Wavelet Transform Digital Watermaking Technology wi...

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2010 Third Pacific-Asia Conference on Web Mining and Web-based Application (WMWA 2010)

作者： Li-nan FAN,Chao-hai CHANG,Bo ZHANG,Dao-jing LI College of Information Engineering Shenyang University Shenyang,China

This paper mainly uses chaos algorithm and wavelet decomposition method to implement digital image watermarking ***,scramble the watermarking digital images by using the chaos algorithm,and then,the scrambled watermark digital images will be embedded into the image which is broken down by the wavelet *** experimental results show that the algorithm has good robustness for common signal attack and cropping attacks.

关键词： digital watermark information hiding chaos algorithm wavelet transform

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Model for predicting reference evapotranspiration based on genetic programming with chaos algorithm

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Shuili Xuebao/Journal of Hydraulic Engineering 2006年第4期37卷 499-503页

作者： Duan, Chun-Qing Qiu, Lin Huang, Qiang Chen, Xiao-Nan Xi'an University of Technology Xi'an 710048 China North China Institute of Water Conservancy and Hydroelectric Power Zhengzhou 450008 China

A model of genetic programming with chaos algorithm is established to predict reference evapotranspiration. The model integrates the merits seeking for a global optimum solution by using chaos algorithm and the powerful capacity seeking for structure of model by using genetic programming. Many digital experiments are carried out and the correlative influences of factors on forecasting precision of model are studied. The application of the proposed model shows that the problem of some parameters will be screened out due to the other parameters has not been optimized, and it will be solved by using chaos algorithm. The model is effective and possessing high accuracy.

关键词： chaos algorithm Evapotranspiration Genetic programming Prediction

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Method for least squares circle fitting based on chaotic optimization algorithm

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology 2008年第8期30卷 101-104页

作者： Wang, Xiu-Mei Qin, Ti-Heng Foundation Department Henna Mechanical and Electrical Engineering College Xinxiang 453002 China

A mathematical model of roundness error was presented based on least square circles. An improved chaotic optimization algorithm was proposed by synthesizing the merit in SWIFT algorithm and chaos algorithm, and constrained optimization problems were transformed into unconstrained optimization to solve the model. Application example of processing data of measuring roundness error showed that the algorithm can achieve global optimization and can also be promoted to process data of other measuring method.

关键词： chaos algorithm Least square circles Roundness error SWIFT algorithm

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