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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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Lightpath reconfiguration management system for IP-over-CWDM networks with ROADMs, based on equivalent graph method

Lightpath reconfiguration management system for IP-over-CWDM...

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IEEE Region 10 International Conference TENCON

作者： Raja Zahilah Soichiro Nishiuma Md. Nooruzzaman Nguyen Thi Thanh Thuy Osanori Koyama Yutaka Katsuyama Faculty of Computer Science and Information System Universiti Teknologi Malaysia Malaysia Johor Bahru Johor Malaysia Graduate School of Engineering Osaka Prefecture University Sakai Osaka Japan

Lightpath reconfiguration management system has been designed and implemented for IP-over-CWDM networks with ROADMs. The system can search possible lightpaths made by ROADMs with specified switch states. The function is based on an equivalent graph method proposed for representing the ROADMs, and can output lightpaths in the network together with the total loss values. The system enables the network administrators to manage the lightpath reconfigurations effectively without errors by avoiding making unlinked lightpaths through routes with higher losses to connect nodes, before the reconfiguration.

关键词： Optical fiber networks Optical switches Optical losses Transceivers Optical fiber couplers computer network management engineering management Power system management Communication system traffic control Communication system control

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Voltage control scheme in distribution network with double feed induction generator wind farm

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WSEAS Transactions on Circuits and systems 2009年第8期8卷 709-718页

作者： Zhao, Jingjing Li, Xin Hao, Jutao State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University 400044 Chongqing China School of Optical-Electrical and Computer Engineering University of Shanghai for Science and Technology 200093 Shanghai China

This paper presents the particle swarm optimization (PSO) for reactive power and voltage control (Volt/Var Control) in distribution system considering DFIG wind farm. In this paper, the reactive power output of DFIG wind farm has been considered as the control variables in the Volt/Var Control scheme by considering the reactive power compensation capability of DFIG. The minimization of total system real power loss and voltage deviation are utilized as an objective and the PSO is used to determine the reactive power output of DFIG wind farm, tap positions of load tap changer transformers (LTC) and numbers of the capacitor banks. Finally, the proposed scheme is applied to the 33-node distribution system. The results indicate that the proposed Volt/Var control scheme can improve the voltage profiles of distribution networks on a large scale.

关键词： Wind turbines

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An Intelligent Context-Aware Spatial Routing system in Mobile Environment

An Intelligent Context-Aware Spatial Routing System in Mobil...

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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Dejian Meng Stefan Poslad Yapeng Wang School of Electronic Engineering and Computer Science Queen''s Mary University of London London UK MPI-QMUL Information System Research Centre Macao Polytechnic Institute Macao China

The rapid growth and development of wireless communication and networking technologies coupled with far more powerful and energy efficient mobile computing systems enable more intelligent behaviours such as user-centric and self-reflection to be used so that mobile user applications can leverage dynamic context information to provide customized services. In this research, an architectural model for the deployment of intelligent context-aware service adaptation process is introduced. A mobile spatial routing application is exploited to demonstrate the improved flexibility and robustness of the new system model.

关键词： Routing Context Mobile computing Context-aware services Wireless communication Communications technology Energy efficiency computer networks Intelligent systems Intelligent networks

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