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International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)

作者： H. Mizutani K. Ota R. Ishikawa K. Honjo Advanced Course of Production System Engineering Salesian Polytechnic Machida JAPAN University of Electro-Communications Graduate School of Informatics and Engineering Chofu JAPAN

In this paper, the novel active composite right/left-handed transmission lines (CRLH-TLs) are presented incorporating FETs for the reconfigurable antennas. The demonstrated CRLH-TL with three FETs has four states with respect to the bias combination of the FETs. The measured characteristics of the developed active CRLH-TL indicate two states of the radiation and the reflection with the bias combination. In the case of the radiation state, the backward radiations are observed from the EM simulation in the left-handed (LH) region. The proposed active CRLH-TLs incorporating FETs provide the reconfigurable characteristics for the leaky wave antenna.

关键词： Field effect transistors Loss measurement Photonic band gap Electromagnetics Equivalent circuits Propagation losses Metamaterials

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Bayesian Inference in Optical Measurement Due to Remote Sensing to Synthetic Aperture Radar Interferometry

Bayesian Inference in Optical Measurement Due to Remote Sens...

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International Conference on Control, Automation and systems

作者： Yohei Saika Shouta Akiyama Hiroki Sakaematsu Department of Information and Computer Engineering Gunma National College of Technology Maebashi 371-8530 Japan Advanced Production System Engineering Course Gunma National College of Technology Maebashi 371-8530 Japan

ISBN: (纸本)9781479905492

We investigated the Bayesian inferences using the maximize a posteriori (MAP) estimation for the problem of phase unwrapping in remote sensing using the synthetic aperture radar (SAR) interferometry. Then, in order to clarify performance of the Bayesian inference estimate, we carried out Monte Carlo simulation for a set of wave-fronts generated by an assumed true prior. Then, we clarified that optimal performance was achieved under the Bayes-optimal condition within statistical uncertainty. Then, we clarified that the present method was effective even for an artificial wave-front in remote sensing due to SAR interferometry. Also, we found that the Bayesian inference via the conjugate gradient method to derive the MAP solution for this problem. Using the numerical simulation for the wave-front, we found that the MAP estimation using the conjugate gradient method was effective for phase unwrapping as well as the MPM estimate approximately.

关键词： Bayesian inference phase unwrapping MPM estimate MAP estimation conjugate gradient method

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An interactive genetic algorithm-based image sharpening system considering user's liking

An interactive genetic algorithm-based image sharpening syst...

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IEEE Symposium on Computational Intelligence for engineering Solutions (CIES)

作者： Yoshiaki Ueda Yohei Kuramoto Ryosuke Kubota Noriaki Suetake Eiji Uchino Advanced Course of Production Systems Engineering Ube National College of Technology Ube Japan Graduate School of Science and Engineering Yamaguchi University Yamaguchi Japan Department of Intelligent System Engineering Ube National College of Technology Ube Japan

Nowadays, digital images can be easily obtained, recorded and processed in accordance with the widespread use of digital cameras and personal computers. There is an image enhancement as one of most general image processing techniques. In the image enhancement, unsharp masking (UM) has been used widely because its algorithm is very simple and can produce good results. However, over-enhancement occurs in edge parts of the image. Additionally UM also is easy to generate artifacts such as jaggy and halo. To cope with these problems, the authors proposed the selective UM method based on the edge-preserved smoothing filter. However, the image quality obtained by our method depends on values of the enhancement parameters, and their optimal values vary according to user's liking. In this paper, we propose an image enhancement system considering the user's liking by using an interactive genetic algorithm (IGA). In the proposed system, the IGA optimizes the parameters of the image enhancement. Further, a new genetic operation is introduced in order to achieve the effective search in the IGA of the proposed system. Through the experiments using some images, the effectiveness of the proposed system is verified.

关键词： Smoothing methods

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Simulation and experiment study for the navigation of the small autonomous weeding robot in paddy fields

Simulation and experiment study for the navigation of the sm...

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SICE Annual Conference

作者： Kentaro Kameyama Yuta Umeda Yuki Hashimoto Department of Mechanical Engineering Fukui National College of Technology Geshi Sabae Fukui Japan Advanced Course of the Production and System Engineering Fukui National College of Technology Geshi Sabae Japan Sabae Murata Manufacturing Co. LTD. Technology Fukui Japan

ISBN: (纸本)9781479914951

In this paper, the autonomous weeding robot for the paddy field is developed. Developed robot is the small two-wheel robot which weeds by running around the paddy field by using the information given from the direction sensor and the GPS receiver. For this robot, the traveling model that take into account the influences of the soil and the GPS error as the w.G.n. and the Wiener process is derived and the conditions for these are investigated by experiments. Behaviors of the robot under the noisy conditions are tested by numerical examples.

关键词： Mobile robots Global Positioning system Robot kinematics Robot sensing systems Wheels Noise

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Heat Transfer Efficiency Evaluation for Outward and Inward Multi-Flame-Hole Gas Burner

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Journal of Thermal Science 2012年第2期21卷 189-195页

作者： Shin-ichi MORITA Yasutaka HAYAMIZU Takashi KATAYAMA Hideo INABA Department of Mechanical Engineering Yonago National College of Technology 4448 Hikona-cho Yonago city Tottori 683-8502 Japan Department of System Production Engineering Yonago National College of Technology Advanced Course 4448 Hikona-cho Yonago city Tottori 683-8502 Japan Tsuyama National College of Technology 624-1 Numa Tsuyama city Okayama 708-8509 Japan

The purpose of this study is to understand the factor that influence the heating efficiency of the outward and inward multi-hole gas burner. The flame-hole angle and the distance from flame hole to heating object are chosen as the experimental parameters. The measurement of the flame temperature distribution is carried out on each experimental condition. The observation of combustion flame, by the Schlieren method, is done from the purpose to understand the combustion phenomenon on the heating efficiency. LPG (Liquefied petroleum gas) is used for the test fuel gas. The compositions of LPG are propane 97.5vol%, butane 0.2vol% and methane + ethylene 2.3vol%. The optimum ranges of the flame-hole angle and the distance from flame hole to heating object are clarified. The experimental correlation equations for the outward and inward multi-flame-hole gas burner are proposed.

关键词： Burner Heat Transfer Design Thermal Efficiency Energy Saving

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A trial of flapping water turbine

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japa...

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Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B 2011年第779期77卷 1445-1456页

作者： Iwagishi, Chiso Nakamura, Takahiko Honmura, Shinji Nakagawa, Koji Hakodate National College of Technology Advanced Course of Production System Engineering Tokura 14-1 Hakodate Hokkaido 042-8501 Japan

A flapping water turbine is a kind of power generating machine which extracts mechanical energy from flowing water by swing of blade motion. In this study, we carried out numerical simulation of blade motion and experiment on river. In the simulation, we made numerical integration of momentum equation about roll angle and compared the result with experiment in water channel. The disagreement in roll angle between the simulation and the result of experiment were discussed by using analytical model and basic data of blade fluid dynamic characteristics. The result of river experiment showed that flapping water turbine can extract energy from stream with rippling surface and turbulence. © 2011 The Japan Society of Mechanical Engineers. © 2012 The Japan Society of Mechanical Engineers.

关键词： Rivers

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"Ee-class"- Interactive lecture support system using the Wii remote

"Ee-class"- Interactive lecture support system using the Wii...

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13th IASTED International Conference on Computers and Advanced Technology in Education, CATE 2010

作者： Sugimoto, Masaki Kiyota, Kimiyasu Ezaki, Nobuo Advanced Course of Production System Engineering Toba National College of Maritime Technology 1-1 Ikegami-cho Toba-shi MIE 517-8501 Japan Department of Human-Oriented Information Systems Engineering Kumamoto National College of Technology 2659-2 Suya Koshi Kumamoto 861-1102 Japan

ISBN: (纸本)9780889868670

In recent years, lectures using electronic devices have been tried in various educational institutions. Using these electronic devices is effective as a means of active participation in lectures for students. The Wii remote is one of these devices. In this paper, we propose the "Eeclass," an interactive lecture support system which uses the Wii Remote. One feature of this system is that students can write in the air using Wii - remotes instead of a blackboard. Implemented functions are as follows: (1) Automatic attendance confirmation, (2) Additional writing on electronic blackboard using an electronic pen device, (3) Automatic counting of a show of hands, (4) Voting opinions, and (5) Writing letter in the air. From the experimental result for 1077 Japanese characters using this handwriting function, we confirmed that the recognition accuracy was 78.5% for the first test and for the 15th was 98.8%.

关键词： Students

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Detection of traffic light using structural information

Detection of traffic light using structural information

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International Conference on Signal Processing Proceedings (ICSP)

作者： Masako Omachi Shinichiro Omachi Advanced Course of Production System and Design Engineering Sendai National College of Technology Natori Japan Graduate School of Engineering University of Tohoku Sendai Japan

Driver support systems using images are paid attention and various researches on recognizing and understanding the road environment have been done. If it is possible to detect and recognize traffic lights, it will give useful information to a driver to understand the road environment. In this paper, a method of detecting a traffic light in a scene image is proposed. Considering the structure of a traffic light, we propose a method for detecting a traffic light based on the Hough transform. Experimental results using images including a traffic light taken by a digital camera through a windshield verifies the effectiveness of the proposed method.

关键词： Pixel Image edge detection Image color analysis Transforms Roads Accuracy

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Study on a Rejection Method of Common Mode Current Focusing on an Output transformer in an AFE Circuit

Study on a Rejection Method of Common Mode Current Focusing ...

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EMC Europe 2006 Barcelona, International Symposium on Electromagnetic Compatibility

作者： S. Saito Y Akeboshi S. Nitta Information Technology R&D Center Mitsubishi Electric 5-1-1 Ofuna Kamakura Kanagawa 247-8501 Japan Advanced Course of Production System Engineering Salesian Polytechnic 4-6-8 Koyamagaoka Machida Tokyo 194-0215 Japan

ISBN: (纸本)8468994383

It is known that the common mode current generated by an analog-front-end (abbr. AFE) of a modem is a main cause of radiation from external wires that are connected with the AFE. In this paper, the experiment and the analysis about the common mode current that mainly depends on an output transformer in an AFE circuit is carried out. As a result, the common mode current is generated mainly through coupling capacitances between primary and secondary windings of the output transformer. Current Transverse Conversion Loss (abbr. CTCL) is used for evaluation index for common mode current. It is confirmed that a shielded transformer with very small coupling capacitances between primary and secondary windings is not always a good solution to improve CTCL. That is because the capacitances between the windings and the intermediary shield layer connected to the ground are not balanced. Then, an output transformer with a balun is proposed for improving CTCL due to reducing the influence of the coupling capacitances.

关键词： Baluns Frequency measurement Couplings Capacitance Windings Resistors Current measurement Equivalent circuits Simulation Capacitors

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Soccer agents using inductive learning with Hand-coded rules

Soccer agents using inductive learning with Hand-coded rules

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IEEE International Conference on systems, Man and Cybernetics

作者： H. Sasaoka S. Muraki K. architecture Advanced Course of Production System Engineering Asahikawa National College of Technology Asahikawa JAPAN

This paper proposes a learning method for rules of soccer agents' actions in RoboCup Soccer. In general, soccer agents need to do high skilled actions in real time and they should have a mechanism to decide the actions. The soccer agents based on our method refer to some types of rules in order that they go into highly skilled actions. One type of them is the rules that are Hand-coded rules. Another type is the rules that are acquired using inductive learning and they are acquired from examples of actions, automatically. We describe the basic idea for them and indicate examples of rules.

关键词： Machine learning Games production systems systems engineering and theory Educational institutions Learning systems Humans Costs

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