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Conference on Lasers and Electro-Optics (CLEO)

作者： Kenichi L. Ishikawa Shao Fang Takashi Tanigawa Naoki Karasawa Mikio Yamashita Photon Science Center School of Engineering CREST-JST University of Tokyo Bunkyo Tokyo Japan Department of Applied Physics CREST-JST Hokkaido University Sapporo Hokkaido Japan Department of Opt-Electronic System Engineering Chitose Institute of Science and Technology Chitose Hokkaido Japan

By optimizing two-color laser fields using genetic algorithm where the duration of the generated high-harmonic pulse is directly taken as a target function, we show that an isolated 40 attosecond pulse is created.

ISBN: (纸本)9781557528896

关键词： Pulse generation Genetic algorithms Optical pulse generation Space vector pulse width modulation Laser theory Supercontinuum generation Delay Power generation Genetic engineering Physics

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Energy efficient trajectory generation for a state-space based JPL Aerobot

Energy efficient trajectory generation for a state-space bas...

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2010 IEEE/RSJ International Conference on Intelligent Robots and systems

作者： Weizhong Zhang Tamer Inanc Alberto Elfes Department of Automation University of Electronic Science and Technology Chengdu China Electrical and Computer Engineering University of Louisville KY USA Faculty of Electrical and Computer Engineering University of Louisville KY USA NASA Jet Propulsion Laboratory CA USA

The 40th anniversary of Apollo 11 project with man landing on the moon reminds the world again by what science and engineering can do if the man is determined to do. However, a huge step can only be achieved step by step which may be relatively small at the beginning. Robotic exploration can provide necessary information needed to do the further step safely, with less cost, more conveniently. Trajectory generation for a robotic vehicle is an essential part of the total mission planning. To save energy by exploiting possible resources such as wind will assist a robotic explorer extend its life span and perform tasks more reliably. In this paper, we propose to utilize Nonlinear Trajectory Generation (NTG) methodology to generate energy efficient trajectores for the JPL Aerobot by exploiting wind. The Aerobot model is decoupled into longitudinal and lateral dynamics with control inputs as elevator deflection δ e , thrust demand δ T , vectoring angle δ v for the longitudinal motion, aileron deflection δ a , rudder deflection δ r for the lateral motion. The outputs are the velocities and orientation of the Aerobot. The Aerobot state space model parameters are obtained from experimental identification on AURORA Airship since the actual JPL Aerobot is similar to the AURORA Airship. In this paper, the results show that with the state-space model, the proposed trajectory generation method can guide the Aerobot to take advantage of previously known wind profile to generate an energy-efficient trajectory.

关键词： Trajectory Robots Atmospheric modeling Elevators Three dimensional displays Planets Mathematical model

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Use of carbon nanotubes in potential electronics packaging applications

Use of carbon nanotubes in potential electronics packaging a...

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2010 10th IEEE Conference on Nanotechnology, NANO 2010

作者： Liu, Johan Wang, Teng Fu, Yifeng Ye, Lilei Department of Microtechnology and Nanoscience Chalmers University of Technology SE-412 96 Göteborg Sweden Key Laboratory of New Displays and System Applications and SMIT Center School of Mechanical Engineering and Automation Shanghai University Box 282 No. 149 Yan Chang Road 200072 Shanghai China SHT Smart High-Tech AB Fysikgränd 3 Se 412 96 Göteborg Sweden

ISBN: (纸本)9781424470334

Packaging of electronics is an important technology to interconnect, power, cool and protect the components in highly integrated systems. Continuous size shrinking and function integration of future electronics are expected to be driven mainly by the advances in packaging technology. Carbon nanotubes (CNTs) are proposed for many novel packaging solutions thanks to their unique electrical, thermal, and mechanical properties. This paper introduces potential use of CNTs in electronics packaging, in both interconnection and thermal management applications. The challenges of fully exploiting the great potential of CNTs in this field are also discussed. ©2010 IEEE.

关键词： Carbon nanotubes

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Effects of algorithmic parameters on swarm robotic search

Effects of algorithmic parameters on swarm robotic search

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International Conference on Information and automation (ICIA)

作者： Ying Tan Songdong Xue Jianchao Zeng Jengshyang Pan Tienszu Pan Complex System and Computational Intelligence Laboratory Taiyuan University of Science and Technology No. 66 Waliu Road Shanxi 030024 China Department of Electronic Engineering National Kaohsiung University of Applied Sciences 807 Taiwan

As one of valid modeling and coordinated controlling tools, the particle swarm optimization algorithm can be extended for applying to task of swarm robotic search. To gain an insight into effects of key parameters on distributed swarm search, a series of simulations are conducted. In such control algorithm, main parameters including communication range, detection radius, and swarm size are paid close attentions. Similar to ideal “particles”, swarm robots are modeled at an abstract level with the extended particle swarm optimization method. Also, individual robots are designed to be controlled under three-state finite state machine mechanism having SingleSearch, SwarmSearch, and Declaration states. Then, control strategy and algorithm are developed. The statistical results from simulating data indicate the validity of modeling approach. Further, the effects of three parameters on overhead and efficiency of system running come out in compared analysis both of different size swarms and of specific size swarm.

关键词： Robot kinematics Robot sensing systems Particle swarm optimization Communication system control Orbital robotics Cognitive robotics Motion control Intelligent robots Robot control Mobile robots

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Average consensus of multi-agent systems with multiple time-delays and jointly-connected topologies

Average consensus of multi-agent systems with multiple time-...

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Chinese Control Conference (CCC)

作者： Peng Lin Hongmei Zhao Man Sun The Institute of Astronautics and Aeronautics University of Electronic Science and Technology of China Chengdu P. R. China Department of Mathematics Stockholm University Stockholm Sweden The Department of Automation and Engineering Northeastern University at Qinhuangdao Qinhuangdao P. R. China

This paper investigates average consensus problem in networks of continuous-time agents with delayed information and jointly-connected topologies. A lemma is derived by extending the Barbalat's Lemma to piecewise continuous functions, which provides a new analysis approach for switched systems. Then based on this lemma, a sufficient condition in terms of linear matrix inequalities (LMIs) is given for average consensus of the system by employing a Lyapunov approach, where the communication structures vary over time and the corresponding graphs may not be connected. Finally, simulation results are provided to demonstrate the effectiveness of our theoretical results.

关键词： Topology Multiagent systems Trajectory Network topology Switches Protocols Matrix decomposition

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Rhythmic component extraction considering phase alignment and the application to motor imagery-based brain computer interfacing

Rhythmic component extraction considering phase alignment an...

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International Joint Conference on Neural Networks (IJCNN)

作者： Hiroshi Higashi Toshihisa Tanaka Yasue Mitsukura Department of Electrical and Electronic Engineering Tokyo University of Agriculture슠and슠Technology Japan Laboratory for Advanced Brain Signal Processing RIKEN Brain Science Institute Japan Graduate School of Bio-Applications and System Engineering Tokyo University of Agriculture슠and슠Technology Japan

We propose a novel method for extracting a rhythmically oscillating signal from EEG recordings including multiple source signals which have similar frequencies. The main application of this method is brain computer interfaces (BCI), which use rhythmically oscillating signals such as alpha, mu, and beta waves, as feature signals. It is difficult to separate those components and/or extract an command-related component when these feature signals span the same frequency band. The main idea is to assume that signals generated in different brain parts have different phases, even though they have the same frequency. This hypothesis is effectively incorporated with the previously proposed rhythmic component extraction (RCE) method, which successfully extracts a signal oscillating at a certain frequency from multi-channel sensor signals in the BCI application. The signal model is firstly given and then this novel extraction method is formulated as an optimization problem. We apply the proposed method for the classification of multi-channel EEG signals between imaginary left/right hand movement. Our experiment suggests that the proposed method is effective in feature extraction for motor-imagery based BCI.

关键词： Feature extraction Electroencephalography Electrodes Brain modeling Cost function Eigenvalues and eigenfunctions Rhythm

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Parameters Extraction of Pseudo-Code PM Combined with SFM Signal Based on QMFBT Techniques

Parameters Extraction of Pseudo-Code PM Combined with SFM Si...

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International Conference on Multimedia technology

作者： Jing Liu Hui-chang Zhao Shu-ning Zhang Department of Electronic Engineering and Optoelectronic Technology Nanjing University of Science and Technology of PLA Nanjing China Institute for System Programming Russian Academy of Sciences Moscow Russia Computational Math and Cybernetics Dept. Moscow State University Moscow Russia

To extract feature parameters of Pseudo-code binary phase modulation combined with sine frequency modulation continuous wave(PRBC-SFMCW), the linear decomposition techniques using Quadrature Mirror Filter Bank Tree (QMFBT) is adopted. With this method, the intercepted signal is decomposed and analyzed by QMFBT. Then according to the feature of PRBC-SFMCW signal contained in different time-frequency layers the algorithm of feature parameter extraction on an appropriate time-frequency layer is presented. The analysis and simulation results show that the SNR of PRBC-SFMCW signal is improved after decomposition. At the same time, the across section disappear and parameters can be estimated accurately in a low SNR condition.

关键词： Frequency modulation Time frequency analysis Feature extraction Filter bank Signal resolution Signal to noise ratio Parameter extraction

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A method of automatic integration test case generation from UML-based scenario

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WSEAS Transactions on Information Science and Applications 2010年第4期7卷 598-607页

作者： Ogata, Shinpei Matsuura, Saeko Course of Functional Control Systems Graduate School of Engineering Shibaura Institute of Technology 307 Fukasaku Minuma-ku Saitama-City Saitama 337-8570 Japan Department of Electronic Information Systems College of System Engineering and Science Shibaura Institute of Technology 307 Fukasaku Minuma-ku Saitama-City Saitama 337-8570 Japan

One key to success for high quality enterprise information systems development is to validate the customers' requirements sufficiently at the early stage. Scenarios are an effective means to an end because they make it possible to represent various situations of system usage. Most scenarios are defined by using a natural language or such a formal language as Unified Modeling Language (UML) and describe normal, alternative, and exceptional service flows from the point of view of system usage. As a result, scenarios make it easy for the customers to confirm their requirements intuitively because of the concreteness. On the other hand, based on the V-model, which is well-known software development process and denotes the correspondence of requirement analysis stage to integration test stage, it is desirable that the testers should test the system by using the test cases derived from the validated scenarios. We have proposed a UML-based requirements analysis (RA) model with automatic prototype system generation for enterprise Web application development. This paper proposes a way to efficiently create reliable test cases from the scenarios that have been validated by the customers using the prototype system which was generated by the RA model.

关键词： Integration testing

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Evaluation of a use-case-driven requirements analysis tool employing web UI prototype generation

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WSEAS Transactions on Information Science and Applications 2010年第2期7卷 273-282页

It has been widely acknowledged that ambiguous or incomplete customer requirements are a major reason for the failure of software development projects. A key example of this is the inconsistency between implementation image and specifications provided in the early stages of software development. To address this, we propose a method for automatic generation of user interface prototypes for developing Web-based business applications, based on the requirements specifications defined in the Unified Modeling Language (UML). In this study, we compare the proposed method with traditional use case modeling to evaluate the effectiveness of the proposed method.

关键词： Unified Modeling Language

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Effective connectivities of cortical regions for top-down face processing: A Dynamic Causal Modeling study

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Brain Research 2010年 1340卷 40-51页

作者： Li, Jun Liu, Jiangang Liang, Jimin Zhang, Hongchuan Zhao, Jizheng Rieth, Cory A. Huber, David E. Li, Wu Shi, Guangming Ai, Lin Tian, Jie Lee, Kang Life Sciences Research Center School of Life Sciences and Technology Xidian University Xi'an 710071 China School of Electronic Engineering Xidian University Xi'an 710071 China School of Computer and Information Technology Beijing Jiaotong University Beijing 100044 China Institute of Automation Chinese Academy of Sciences Beijing 100190 China Developmental Cognitive Neuroscience Laboratory Northwestern University IL United States Department of Neuroimaging Beijing Tiantan Hospital Capital Medical University Beijing 100050 China Department of Psychology University of California San Diego La Jolla CA United States Institute of Child Study University of Toronto Toronto Ont. Canada

To study top-down face processing, the present study used an experimental paradigm in which participants detected non-existent faces in pure noise images. Conventional BOLD signal analysis identified three regions involved in this illusory face detection. These regions included the left orbitofrontal cortex (OFC) in addition to the right fusiform face area (FFA) and right occipital face area (OFA), both of which were previously known to be involved in both top-down and bottom-up processing of faces. We used Dynamic Causal Modeling (DCM) and Bayesian model selection to further analyze the data, revealing both intrinsic and modulatory effective connectivities among these three cortical regions. Specifically, our results support the claim that the orbitofrontal cortex plays a crucial role in the top-down processing of faces by regulating the activities of the occipital face area, and the occipital face area in turn detects the illusory face features in the visual stimuli and then provides this information to the fusiform face area for further analysis. © 2010 Elsevier B.V. All rights reserved.

关键词： Bottom-up processing Dynamic Causal Modeling (DCM) Face processing Orbitofrontal cortex (OFC) Top-down processing

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