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SICE Annual Conference

作者： Takuto Komiyama Kazuyuki Kobayashi Kajiro Watanabe Tomoyuki Ohkubo Yosuke Kurihara Department of Systems and Control Engineering Faculty of Engineering Hosei University Tokyo Japan Faculty of Engineering Hosei University Koganei Tokyo Japan Faculty of Science and Technology Seikei University Musashino Tokyo Japan

ISBN: (纸本)9781457707148

In recent years, visible light communication is attracting growing interest for wireless communications since it is low-cost and easily maintained by using high-speed switchable LEDs. We have developed a prototype to demonstrate wireless visible light communications using RGB LEDs as both transmitter and light source. The RGB LEDs enable parallel signal communications, and a PSoC microcontroller is used to control them, thus significantly reducing the need for extra circuits and allowing rapid modification of communication software. A prototype system was developed and its validity was confirmed.

关键词： Light emitting diodes Image color analysis Modulation Educational institutions Wireless communication Light sources

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Estimation of thermal constriction resistance for simple thermal network analysis of electronic components

Estimation of thermal constriction resistance for simple the...

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International Microsystems, Packaging, Assembly and Circuits Technology (IMPACT)

作者： Toshio Tomimura Masaru Ishizuka Department of Advanced Mechanical Systems Graduate School of Science and Technology Kumamoto University Kumamoto Japan Department of Mechanical Systems Engineering Faculty of Engineering Toyama Prefectural University Imizu Japan

Related to the thermal contact resistance, lots of studies have been done on the thermal constriction resistance, which is a measure of the additional temperature drop at the contact interface [1]. And almost all of those studies have been conducted based on the two-dimensional cylindrical coordinates system. In the same way, the additional thermal resistance associated with the geometrical constriction is often encountered in the electronic components like relay circuits, the printed circuit boards, and so on. In these cases, however, heat is frequently transferred through a thin and narrow passage, which should be treated by two-dimensional rectangular coordinates system.

关键词： Thermal resistance Thermal analysis Heating Isothermal processes Electronic components Thermal engineering

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Least square application on frequency weighted model reduction technique

Least square application on frequency weighted model reducti...

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International Conference on Modeling, Simulation and Applied Optimization (ICMSAO)

作者： Shafishuhaza Sahlan Mashitah Shikh Maidin Norhaliza Wahab Control and Systems Engineering Department (CIED) Faculty of Electrical Engineering Universiti Teknologi Malaysia Skudai Johor Malaysia Faculty of Science Universiti Putra Malaysia Selangor Malaysia

In this paper, we present new results on frequency weighted balanced truncation technique based on vec and Kronecker Product. This technique is applied to single-sided case and an extension to double-sided case is als... 详细信息

关键词： Equations Mathematical model Reduced order systems controllability Observability Least squares methods Stability analysis

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Multi-channel template extraction for automatic EEG spike detection

Multi-channel template extraction for automatic EEG spike de...

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IEEE/ICME International Conference on Complex Medical engineering, CME

作者： Zhanfeng Ji Takenao Sugi Satoru Goto Xingyu Wang Masatoshi Nakamura Department of Automation East China University of Science and Technology Shanghai China Department of Advanced Systems Control Engineering Saga University Saga Japan Research Institute of Systems Control Saga Japan

A multi-channel template extraction method is proposed for automatic EEG spike detection. The template is extracted automatically without any prior knowledge. The template extraction algorithm consists of three steps. Firstly, all possible spike events are detected. Secondly, the focus channels are identified for each event. Thirdly, the multi-channel template is extracted for each focus channel. The algorithm produces template adapted to not only individual patient, but also individual focus. The method was evaluated using the recordings from two epilepsy patients. The results suggested that template method should be of multi-channel for spike detection.

关键词： Correlation Nickel

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Comparative study of affordance-based navigation and model-based navigation: Experimental analysis of learning ability of mobile robot that taps objects with a stick for navigation

Comparative study of affordance-based navigation and model-b...

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IEEE International Conference on Robotics and Biomimetics

作者： Taishi Yamashiro Kazuyuki Ito Graduate School of Systems and Control Engineering Hosei University Koganei Tokyo Japan Department of Electrical and Electronics Engineering Faculty of Science and Engineering Hosei University Koganei Tokyo Japan

Navigation is an important topic in robotics, and various approaches have been proposed thus far. Conventional methods are of two types: those that create and utilize a model of the environment, and those that employ the environment itself instead of a model. For autonomous robots that have learning ability, the difference between these approaches has a significant impact because the learning target differs fundamentally. In the former case, the learning target is to create a model of the environment. Hence, robots learn the positions of obstacles, walls, and so on. In the latter case, the learning target is to explore how the various properties of the environment can be used for navigation. In this paper, we discuss the difference between these two types of learning-based navigation. We employ reinforcement learning as a learning algorithm and conduct simulations and experiments. Consequently, we confirm that the latter mode exhibits a better performance, and in particular, we demonstrate the real-time learning and applicability of the obtained policy for different environments.

关键词： Navigation Biological system modeling Switches Learning Robot sensing systems Mathematical model

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Effects of elasticity of an obstacle wall on flow-induced sounds ~simultaneous measurement of fricative sounds and vibration of the obstacle wall using an in vitro oral cavity model~

Transactions of Japanese Society for Medical and Biological ...

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Transactions of Japanese Society for Medical and Biological engineering 2011年第6期49卷 864-869页

作者： Takimoto, Haruka Nozaki, Kazunori Nakamura, Masanori Fujigaki, Motoharu Wada, Shigeo Graduate School of Engineering Science Osaka University Japan The Center for Advanced Medical Engineering and Informatics Osaka University Japan Department of Mechanical Engineering Saitama University Japan Faculty of Systems Engineering Wakayama University Japan

It is reported that patients who have undergone dental surgery of implanting prosthetic teeth often suffer from pronunciation disorders. In reference to the past studies which report a correspondence of the peak in a frequency spectrum between the fricative sound and the vibration of anterior teeth, it was hypothesized that the postoperative pronunciation disorders were attributable to a change in the vibration mode of anteriorlyimplanted prosthetic teeth that have different elastic natures from natural teeth. The present study was designed to investigate effects of elastic properties of anteriorly-positioned prosthetic teeth on characteristics of its vibration and the emitted-sound. The flow channel was fabricated such that it morphologically simplified an oral cavity when sibilant/s/, one of the fricatives, is pronounced. An obstacle wall that is a model of anteriorly-positioned prosthetic teeth was made of four materials having different elasticity. The results demonstrated that the obstacle wall of different elasticity resulted in different modes of the vibration. However, the frequency spectrum of the emitted sound appeared to be almost the same irrespective of the elastic property of the teeth. Those results indicated less contributions of the teeth vibration to acoustic nature of the emitted sound, thereby suggesting that the postoperative pronunciation disorders is not due to a change in the vibration mode of prosthetic teeth at the anterior position.

关键词： Elasticity

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A novel type of trigonometric neural network trained by Extended Kalman Filter

A novel type of trigonometric neural network trained by Exte...

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International Workshop on advanced Computational Intelligence (IWACI)

作者： M. Norouzi M. Mansouri M. Teshnehlab M. Aliyari Shoorehdeli Faculty of Engineering Department of Computer Engineering Science and Research Branch Islamic Azad University Iran Intelligent System Laboratory (ISLAB) Faculty of Electrical Engineering Control Department K.N. Toosi University of Technology Tehran Iran Faculty of Electrical Engineering Department of Mechatronics Engineering Advanced Process Automation &Control Laboratory (APAC) K.N. Toosi University of Technology Tehran Iran

In this study, a new type of trigonometric neural network is presented by adding frequency and phase to trigonometric activation functions. The proposed trigonometric neural network has more flexibility in comparison with conventional trigonometric neural networks and even other types of neural networks. Due to the low convergence rate and high posibility of trapping in a local minimum of backpropagation algorithm, Extended Kalman Filter algorithm is used to train the neural network's parameters which they appear in a nonlinear form. The Simulation of the suggested neural network based on the prediction of Mackey-Glass time series and identification of a nonlinear dynamic ystem reveals the efficiency of the proposed network. To show the efficiency of this method, the results are compared with the results of the others.

关键词： Biological neural networks Kalman filters Equations Neurons Vectors Covariance matrix Mathematical model

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Degree of polarization of Mie scattered stationary partially coherent electromagnetic fields

Degree of polarization of Mie scattered stationary partially...

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International Conference on Quantum Electronics (IQEC)

作者： Madara L. Marasinghe Malin Premaratne David M. Paganin Advanced Computing and Simulation Laboratory (AL) Department of Electrical and Computer Systems Engineering Faculty of Engineering Monash University Clayton VIC Australia School of Physics Faculty of Science Monash University Clayton VIC Australia

The polarization of non-paraxial partially coherent light scattered from nanospheres cannot be described easily. We utilize the degree of polarization to quantify Mie scattered partially coherent light and demonstrate... 详细信息

ISBN: (纸本)9780977565771

关键词： Polarization Lattices Electromagnetic fields Optics Coherence Dielectrics

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The development of magnetic navigation system for home use of repetitive Transcranial Magnetic Stimulation

Transactions of Japanese Society for Medical and Biological ...

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Transactions of Japanese Society for Medical and Biological engineering 2011年第1期49卷 122-131页

作者： Fukushima, Taishi Nishikawa, Atsushi Miyazaki, Fumio Sekino, Masaki Yasumuro, Yoshihiro Matsuzaki, Taiga Hosomi, Koichi Saitoh, Youichi Department of Mechanical Science and Bioengineering Graduate School of Engineering Science Osaka University Japan Department of Neuromodulation and Neurosurgery Center for Advanced Science and Innovation Osaka University Japan Division of Applied Biology Faculty of Textile Science and Technology Shinshu University Japan Department of Electrical Engineering and Information Systems Graduate School of Engineering University of Tokyo Japan Faculty of Environmental and Urban Engineering Kansai University Japan Home Healthcare Research and Development Department Teijin Pharma Limited Japan

Repetitive Transcranial Magnetic Stimulation (rTMS) is effective for intractable diseases of the nervous system. As the effects of rTMS last only several hours, rTMS therapies need to be continued daily. Under present circumstances, it is difficult to use rTMS in patients' home, because only experienced physicians in limited hospitals can use the expensive and complicated rTMS system. Therefore, we developed a magnetic navigation system for home use of rTMS. The proposed system uses inexpensive and small magnetic sensors;hence it is suitable for home use. By using the proposed method, even people who have no medical knowledge and technique can easily navigate the coil to the optimal position preliminarily specified by expert physicians. Our system needs to collect some dataset which consists of magnetic field and the corresponding position of the coil at the patients' initial visit. Since it is bothersome to collect a large number of dataset, we reduced the dataset by approximation using multi-regression analysis.

关键词： Regression analysis

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Poloidal magnetic flux profile control in tokamaks via normalized coprime factorization robust control

Poloidal magnetic flux profile control in tokamaks via norma...

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IEEE Conference on control Technology and Applications (CCTA)

作者： Justin Barton Yongsheng Ou Chao Xu Eugenio Schuster Michael Walker Department of Mechanical Engineering and Mechanics Lehigh University Bethlehem PA USA Center for Intelligent and Biomimetic Systems Shenzhen Institute of Advanced Technology Shenzhen China Department of Control Science and Engineering Institute of Cyber-Systems and Control Zhejiang University Hangzhou China General Atomics San Diego CA USA

The potential steady-state operation of a fusion tokamak, with good confinement and a high fusion gain, is related to setting up a suitable current density profile in the device. Experiments at the DIII-D tokamak focus on creating the desired current profile during the plasma current ramp-up and early flat-top phases of the discharge with the aim of maintaining this target profile throughout the subsequent phases of the discharge. The time evolution of the current density profile in a tokamak is related to the time evolution of the poloidal magnetic flux profile, which is modeled in normalized cylindrical coordinates by a partial differential equation referred to as the magnetic diffusion equation. Extremum seeking and nonlinear programming techniques have been employed to find optimal open-loop (feedforward) solutions to the finite time control problem during the ramp-up and early flat-top phases. In order to reject the effects of external disturbances to the system, we propose an optimal H ∞ feedback control input that is added to the optimal feedforward control input to regulate the poloidal flux profile around the desired reference trajectories of the system. The combined feedforward + feedback, model-based controller is then tested through simulation.

关键词： Mathematical model Tokamaks Feedforward neural networks Uncertainty Toroidal magnetic fields Equations

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