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2010 International Conference on computer Application and System Modeling, ICCASM 2010

作者： Meng, Baoguo Zhang, Zhenrong Peng, Shuping Zhong, Yucheng Li, Zhengbin He, Yongqi Zhu, Lixin Xu, Anshi Zhang, Yanmei State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing 100871 China School of Information Engineering China University of Geosciences Beijing 100083 China School of Computer Electronics and Information Guangxi University Nanning 530004 China

ISBN: (纸本)9781424472369

Based on a multi-channel unidirectional ring network test bed, a data transmission model is established and tested. The settings and the implementation of the model are introduced in detail. Finally, the model is tested based on the test bed. The results from both the sending and the receiving transmission platforms show the data transmission model can work effectively. © 2010 IEEE.

关键词： Data transfer

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Studying the impact of synchronization frequency on scheduling tasks with dependencies in heterogeneous systems

Studying the impact of synchronization frequency on scheduli...

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作者： Andronikos, Theodore Ciorba, Florina M. Riakiotakis, Ioannis Papakonstantinou, George Chronopoulos, Anthony T. Department of Informatics Ionian University Corfu Greece Computing Systems Laboratory Department of Electrical and Computer Engineering National Technical University of Athens Greece Center for Advanced Vehicular Systems Mississippi State University MS United States Department of Computer Science University of Texas at San Antonio 6900 N. Loop 1604 West San Antonio TX 78249 United States

In this work, we develop and evaluate a theoretical model, which we then use to study the impact of the synchronization frequency on the performance of dynamic self-scheduling algorithms. These algorithms are used to parallelize loops with data dependencies on heterogeneous systems. The proposed model uses a formula to estimate the parallel time as a function of the synchronization frequency. Inter-node communication has been proven to be the dominant factor for the performance degradation of applications containing loops with data dependencies. The synchronization mechanism therefore requires careful fine-tuning in order to give the best possible performance. The proposed model determines the optimal synchronization frequency that results in the minimum parallel time. We use this model to study the impact of the synchronization frequency on the parallel execution of a computational kernel from image processing. For this kernel, the synchronization frequency giving the minimum parallel time predicted by our theoretical model was very close to the synchronization frequency giving the least parallel time in practice. We validate our model by extensive comparisons of the theoretically predicted parallel time and synchronization frequency against those obtained from practical experiments. The comparisons show that the proposed model is highly accurate, its predictions for the optimal synchronization frequency being within 0.0250% of the experimentally optimal synchronization frequency in the best case, and within 0.1750% of the experimentally optimal synchronization frequency in the worst case. Finally, the comparisons show that the proposed model improves on a previously existing model in heterogeneous systems, whereas it gives similar results in homogeneous systems. © 2010 Elsevier B.V. All rights reserved.

关键词： Synchronization

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Performance evaluation of MB-OFDM ultra-wideband over fiber transmission using a low cost electro-absorption modulator integrated laser

Performance evaluation of MB-OFDM ultra-wideband over fiber ...

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2010 IEEE International Topical Meeting on Microwave Photonics, MWP 2010

作者： Sui, Chengwen Hraimel, Bouchaib Zhang, Xiupu Wu, Ke Liu, Taijun Xu, Tiefeng Nie, Qiuhua Advanced Photonic Systems Laboratory Department of Electrical and Computer Engineering Concordia University Montreal QC H3G1M8 Canada Polygrames Research Center Ecole Polytechnique de Montreal Montreal QC Canada College of Information Science and Engineering Ningbo University Zhejiang 315211 China

ISBN: (纸本)9781424478255

The performance of Multiband-Orthogonal Frequency Division Multiplexing (MB-OFDM) Ultra-WideBand (UWB) signal over single mode fiber system using a low cost Electro-Absorption Modulator (EAM) integrated laser (EML) is studied experimentally. Error Vector Magnitude (EVM) measurement is carried out to evaluate the system performance considering the effect of bias voltage, bias current temperature and optical modulation index of the EML, and fiber length. The experiment results showed that by using an EML, the UWB signal transmission over fiber can be cost effectively implemented. ©2010 IEEE.

关键词： Single mode fibers

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A goal-oriented fuzzy reactive control for mobile robots with automatic rule optimization

A goal-oriented fuzzy reactive control for mobile robots wit...

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2010 IEEE/RSJ International Conference on Intelligent Robots and systems

作者： Anmin Zhu Simon X. Yang School of Computer Science and Software Engineering Shenzhen University China Advanced Robotics and Intelligent Systems ARIS) Laboratory School of Engineering University of Guelph Canada

To realize real-time goal-oriented navigation for a mobile robot in unpredictable environments, a fuzzy reactive system is proposed in this paper. Besides the establishment of the fuzzy logic system, this paper focuses on the the physical meaning of the parameters in the fuzzy system, and proposes a systematic method to automatically suppress redundant fuzzy rules from the rule base. Under the control of the proposed system with automatic redundant fuzzy rule removal, the mobile robot can preferably avoid obstacles autonomously, and generate reasonable trajectories toward the target in various situations. The effectiveness and efficiency of the proposed approach are demonstrated by simulation and experimental studies.

关键词： Mobile robots Robot sensing systems Wheels Fuzzy logic Navigation

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Astronomy and Cosmology

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IEEE SIGNAL PROCESSING MAGAZINE 2010年第1期27卷 13-+页

作者： Leshem, Amir Kamalabadi, Farzad Kuruoglu, Ercan Engin van der Veen, Alle-Jan Center for Engineering Systems Advanced Research Computer Science and Mathematics Division Oak Ridge National Laboratory Oak Ridge TN USA

This special issue is devoted to advanced signal processing techniques used in astronomy and cosmology that enable progress in solving the major problems in observational *** first part of this special issue deals with digital interferometry in the radio and optical domains, while the second part deals with applications of signal processing to cosmology.

关键词： Astronomy Uniform resource locators Biomedical signal processing Acoustic signal processing Dark energy Signal processing algorithms Optical signal processing Optical interferometry Array signal processing Frequency

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Constellation Design for Odd-Bit Quadrature Amplitude Modulation

Constellation Design for Odd-Bit Quadrature Amplitude Modula...

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IEEE Wireless Communications and Networking Conference Workshops (WCNCW)

作者： Yiling Wu Yuping Zhao Hongbin Li State Key Laboratory of Advanced Optical Communication Systems & Networks School of Electronics Engineering and Computer Science Peking University Beijing China

ISBN: (纸本)9781424464050;9781424464067

In this paper, we study the constellation design of quadrature amplitude modulations (QAMs) with odd number of bits per symbol. A square constellation, which adopts symmetrical Gray labeling, is proposed. Simplified mapping and demapping methods are also designed for it. Performance of the proposed square constellation is compared with that of conventional rectangular and cross constellations. As simulation results show, the proposed square constellation obtains better BER performance when channel coding is used in communication systems. Moreover, it achieves much lower realization complexity than cross constellation by using the proposed mapping and demapping method.

关键词： Quadrature amplitude modulation Labeling Peak to average power ratio Bit error rate Design methodology Channel coding Frequency estimation Optical design Laboratories Optical fiber communication

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Truly random number generation based on measurement of phase noise of a laser

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Physical Review E 2010年第5期81卷 051137-051137页

作者： Hong Guo Wenzhuo Tang Yu Liu Wei Wei CREAM Group State Key Laboratory of Advanced Optical Communication Systems and Networks (Peking University) and Institute of Quantum Electronics School of Electronics Engineering and Computer Science Peking University Beijing 100871 China

We present a simple approach to realize truly random number generator based on measuring the phase noise of a single-mode vertical cavity surface emitting laser. The true randomness of the quantum phase noise originates from the spontaneous emission of photons and the random bit generation rate is ultimately limited only by the laser linewidth. With the final bit generation rate of 20 Mbit/s, the truly random bit sequence guaranteed by the uncertainty principle of quantum mechanics passes the three standard randomness tests (ENT, Diehard, and NIST Statistical Test Suites). Moreover, a continuously generated random bit sequence, with length up to 14 Gbit, is verified by two additional criteria for its true randomness.

关键词： Phase noise

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Highly Sensitive Intensity Sensor Based on Interference between Coupled Microring Resonators

Highly Sensitive Intensity Sensor Based on Interference betw...

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Photonics and Optoelectronics, SOPO

作者： Huaxiang Yi Zhiping Zhou D. S. Citrin State Key Laboratory on Advanced Optical Communication Systems and Networks PU Beijing China School of Electrical and Computer Engineering GIT Atlanta USA

The coupled microring resonators interference is discussed and applied to intensity sensing. Relaxed from the requirement of high quality factor, better performance of the coupled MR intensity sensor compared with con... 详细信息

关键词： Interference Transmission line matrix methods Optical coupling Q factor Optical waveguides Optical resonators Resonance Optical sensors Fabrication Waveguide junctions

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Micro preconcentrator for handheld diagnostics of cancer biomarkers in breath

Micro preconcentrator for handheld diagnostics of cancer bio...

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IEEE SENSORS

作者： Bassam Alfeeli Masoud Agah VT MEMS Laboratory Department of Electrical and Computer Engineering Virginia Tech and Department of Advanced Systems Kuwait Institute for Scientific Research Kuwait VT MEMS Laboratory Department of Electrical and Computer Engineering Virginia Technology Blacksburg VA USA

This paper introduces, for the first time, Maltese-cross pillar design implemented in a 7 mm × 7 mm × 0.35 mm cavity for high-performance microfabricated preconcentrators (μPCs). This high-aspect ratio design provides more surface area over the previously reported basic geometric shapes. Results showed that Maltese-cross provided 27% increases in performance. Moreover, reducing the pillar spacing from 100 μm to 10 μm and arranging the pillars in staggered fashion have resulted in 145% and 85% increase in performance, respectively. Therefore, it was concluded that both surface area and flow pattern contribute significantly to the device performance. These μPCs achieved high adsorption capacity making them suitable for handheld breath analyzers to concentrate and identify trace-level (low ppm) volatile compounds (cancer biomarkers) found in human breath.

关键词： Cancer Performance evaluation Shape Silicon compounds Biomarkers Temperature measurement Fabrication

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A survey on intelligent interaction and cooperative control of multi-robot systems

A survey on intelligent interaction and cooperative control ...

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International Conference on Control and Automation (ICCA)

作者： Anmin Zhu Simon X. Yang School of Computer Science and Software Engineering Shenzhen University China Advanced Robotics and Intelligent Systems (ARIS) Laboratory School of Engineering University of Guelph Guelph ONT Canada

Multi-robot systems have drawn the attention of many different research communities, such as physics, electronics, control, computer science, mathematics, and biology. Motivated by the growing popularity of multi-robot system and related coordination approaches, this paper surveys and analyzes the relevant literature, including six classification dimensions: system architectures, communication and robotic sensor networks, swarm intelligence and swarm robotics, cooperation among robots, applications, and research projects.

关键词： Control systems Multirobot systems Robot sensing systems Robot kinematics Intelligent robots Physics Communication system control Biological control systems computer science Mathematics

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