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The stability of high-order cohen-grossberg neural networks

Journal of Information and Computational science 2009年第3期6卷 1647-1652页

作者： Lei, Jingsheng Yan, Ping Lv, Teng School of Computer and Information Engineering Shanghai University of Electric Power Shanghai 200090 China College of Mathematics and System Science Xinjiang University Urumqi 830046 China Teaching and Research Section of Computer Artillery Academy Hefei 230031 China

In this paper, we study the stability of high-order Cohen-Grossberg neural networks with delays and reaction-diffusion terms. Some sufficient conditions are given to ensure the existence, uniqueness and globally exponential stability of the equilibrium point to the high-order Cohen-Grossberg neural networks. 1548-7741/ Copyright © 2009 Binary Information Press.

关键词： Diffusion in liquids

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Wind Farm Reactive Power Output Optimization for Loss Reduction and Voltage Profile Improvements

Wind Farm Reactive Power Output Optimization for Loss Reduct...

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第六届IEEE国际电力电子与运动控制会议 (2009 IEEE 6th International Power Electronics and Motion Control Conference-ECCE Asia

作者： C.L.Zhang J.J.Zhao X.Li J.P.Lu J.T.Hao State Key Laboratory of Transmission & Distribution Equipment and Power System Safety and New Techno School of Optical-Electrical and Computer Engineering University of Shanghai for Science and Technol

In recent years, the number of small size wind farms used as DG sources located within the distribution system are rapidly increasing. In this paper, wind farm made up with doubly fed induction generators (DFIG) is proposed as the continuous reactive power source to support system voltage control due to the reactive power control capability of DFIG. The particle swarm optimization (PSO) is utilized to find wind farm optimal reactive power output for distribution system losses reduction and voltage profiles improvement. Finally, the three feeder distribution system is used as a test case to evaluate the algorithm.

关键词： Wind farms Reactive power Reactive power control Induction generators Voltage control Wind energy generation Rotors Wind turbines Power system modeling Optical computing

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Ultra-low repetition rate SESAM-mode-locked linear-cavity erbium-doped fiber laser

Ultra-low repetition rate SESAM-mode-locked linear-cavity er...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Lingling Chen Meng Zhang Chun Zhou Yue Cai Ling Ren Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing China

We investigated linear-cavity with ultra-low repetition rate Erbium-doped fiber laser mode-locked by a high modulation depth SESAM. Output pulses were highly-chirped, at energy up to 14 nJ and minimum repetition rate ... 详细信息

ISBN: (纸本)9781424438303

关键词： Erbium-doped fiber lasers Laser mode locking Optical fiber polarization Optical pulses Optical fiber communication Laser stability Fiber lasers Laser theory Pulse amplifiers Ring lasers

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Sub-100khz repetition rate mode-locked dispersion managed erbium-doped fiber laser

Sub-100khz repetition rate mode-locked dispersion managed er...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Yue Cai Chun Zhou Lingling Chen Meng Zhang Ling Ren Peng Li Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Beijing Normal University Beijing China

A 91.4 kHz repetition rate Er-doped dispersion managed mode-locked fiber laser was demonstrated. The pulse energy was amplified to 790 nJ though single stage amplifier.

ISBN: (纸本)9781424438303

A 91.4 kHz repetition rate Er-doped dispersion managed mode-locked fiber laser was demonstrated. The pulse energy was amplified to 790 nJ though single stage amplifier.

关键词： Erbium-doped fiber lasers Laser mode locking Optical fiber polarization Pulse amplifiers Optical fiber communication Laser theory Optical pulses Space vector pulse width modulation Fiber lasers Wavelength division multiplexing

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Simplified cavity for erbium-doped fiber laser mode locked with spectral filtering

Simplified cavity for erbium-doped fiber laser mode locked w...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Yue Cai Chun Zhou Lingling Chen Meng Zhang Ling Ren Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Beijing Normal University Beijing China

We report a simplified mode-locked Er fiber laser in normal dispersion with birefringence filters compared with the one with nonlinear polarization evolution mechanism.

ISBN: (纸本)9781424438303

We report a simplified mode-locked Er fiber laser in normal dispersion with birefringence filters compared with the one with nonlinear polarization evolution mechanism.

关键词： Laser mode locking Erbium-doped fiber lasers Optical fiber polarization Filters Laser theory Birefringence Optical fiber communication Wavelength division multiplexing Filtering Optical pulses

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381 KHz repetition-rate operation of an ytterbium-doped fiber laser

381 KHz repetition-rate operation of an ytterbium-doped fibe...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Chun Zhou Lingling Chen Yue Cai Meng Zhang Ling Ren Peng Li Zhigang Zhang Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Beijing Normal University Beijing China

381 kHz repetition-rate operation of an Yb-doped fiber laser oscillator and amplifier was demonstrated. The single pulse energy was 734 nJ after the single stage amplification.

ISBN: (纸本)9781424438303

381 kHz repetition-rate operation of an Yb-doped fiber laser oscillator and amplifier was demonstrated. The single pulse energy was 734 nJ after the single stage amplification.

关键词： Fiber lasers Optical fiber polarization Laser mode locking Optical fiber communication Pulse amplifiers Space vector pulse width modulation Chemical lasers Optical pulses Laser theory Oscillators

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Range Matching without TCAM Entries Expansion for Packet Classification

Range Matching without TCAM Entries Expansion for Packet Cla...

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Japan-China Joint Workshop on Frontier of computer science and Technology (FCST)

作者： Yang Li Chengwei Wan Xiumei Fan School of Computer Science & Technology Beijing Institute of Technology Beijing China Engineering and Technology Research and Development Centre National Digital Switching System Zhengzhou Henan China

Packet classification has been widely used in network security protection. A number of the major techniques for network security protection, such as virtual private networks (VPN), firewalls, and network intrusion detection systems (NIDS), are all dependent on the speed and ability of packet classification. The complexity of multi-dimensional packet classification will result in large scale rule-sets, which makes it prohibitive for software implementation. Algorithms based on ternary content addressable memory (TCAM) can solve this problem but cause entries expansion during the range matching. Our paper introduces a new region encoding mechanism of range mapping which can eliminate the expansion. By adding a new regional code, which is used to encode the ranges spanning two regions or more, the improved mechanism is able to express all the ranges by only one entry. Simulation and characteristics analysis of real rule-sets verify this encoding mechanism's feasibility and efficiency in actual applications.

关键词： Protection Virtual private networks Intrusion detection computer science National security Multidimensional systems Encoding Routing Quality of service Wide area networks

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Advances in SESAM and carbon nanotube saturable absorber mode locked fiber lasers

Advances in SESAM and carbon nanotube saturable absorber mod...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Zhigang Zhang Meng Zhang Lingling Chen Yiyang Jiao Zhao Tu Ling Ren Yue Cai Chun Zhou Institute of Quantum Electronics State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Beijing Normal University Beijing China

The paper summarizes recent advances in Er and Yb doped mode locked fiber lasers with saturable absorbers such as semiconductor and carbon nanotube saturable absorbers.

ISBN: (纸本)9781424438303

The paper summarizes recent advances in Er and Yb doped mode locked fiber lasers with saturable absorbers such as semiconductor and carbon nanotube saturable absorbers.

关键词： Laser mode locking Carbon nanotubes Fiber lasers Optical fiber polarization Laser theory Absorption Optical fiber devices Semiconductor lasers Mirrors Optical fiber communication

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N-order difference heuristic model of fuzzy time series forecasting

N-order difference heuristic model of fuzzy time series fore...

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IEEE International Conference on Intelligent Computing and Intelligent systems (ICIS)

作者： Kai Chi Wen-Gang Che Pattern Recognition and Intelligent System School of Information Engineering and Automation Kunming University of Science and Technology China Key Laboratory of Computer Technology and Application of Yunnan Province Kunming University of Science and Technology China

Fuzzy time series forecasting model is an effective method to solve the nonlinear problems forecasting. However, most published fuzzy time series based models did not count the change trend implicit in historical datum. In this paper, authors proposed a novel method which applied heuristic information to the fuzzy time series model based on Fibonacci sequence. As an example, the USD/JPY exchange rate is tested in this model. The results show that this method not only improves the forecasting accuracy, but decreases the computational complexity.

关键词： Predictive models Technology forecasting Economic forecasting Uncertainty Fuzzy systems Pattern recognition Intelligent systems Automation Channel hot electron injection Laboratories

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Improving the Connectivity of Multi-providers Network with Protected Tunnel

Improving the Connectivity of Multi-providers Network with P...

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Pacific-Asia Conference on Circuits, Communications and systems, PACCS

作者： Hailong Ma Yunfei Guo Jianwei Zhang Technology Research Center National Digital Switching System Engineering and Technological Research and Development Center Zhengzhou China School of Computer Science and Communication Engineering Zhengzhou University of Light Industry Zhengzhou China

Maintaining connectivity is a key responsibility of any routing system, but successfully carrying it out can be challenging, especially for inter-domain paths. Many measurements indicate the links failures are fairly common in the Internet. During the period of failures, some destination would be unreachable and the corresponding services unavailable. Shrinking the convergence time window to improve connectivity of destination may cause routing instability when the majority of failures are transient. To improve failure resiliency without jeopardizing routing stability, we propose a fast reroute approach, called PT, which works by pre-established protected tunnel to react quickly to multi-providers network link failures so as to perform non-stop routing. Through simulation we demonstrate that PT is more resilient to multi-providers network link failures and the scale of exchanged messages is acceptable.

关键词： Protection Routing Internet Circuits Switching systems systems engineering and theory Convergence Stability Computational modeling computer network reliability

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