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2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012

作者： Ratsamee, Photchara Mae, Yasushi Ohara, Kenichi Takubo, Tomohito Arai, Tatsuo Division of Systems Science and Applied Informatics Graduate School of Engineering Science Osaka University Japan Faculty of Systems Science and Applied Informatics Osaka University Japan

ISBN: (纸本)9781467312776

Prediction and observation of human motion are essential functions for robots co-existing with humans in everyday environments. We propose a people motion tracking and prediction approach by using the advantage of detailed 3D information about the positions of body joints. Using the shoulder position displayed in a geometrical skeleton diagram of a human's upper body part, the body pose from the proposed human kinematic model is estimated. Human motion tracking and path prediction are achieved via the extended Kalman Filter. The proposed method is verified in an indoor environment where humans pass by each other. Experiment results demonstrate that walking people and their body pose are robustly tracked and predicted accurately, with less occlusions compared to traditional human tracking. © 2012 IEEE.

关键词： Kalman filters

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Interpolation capability of the periodic radial basis function

Interpolation capability of the periodic radial basis functi...

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2005 Fifth International Conference on Information, Communications and Signal Processing

作者： Abe, Yoshinori Iiguni, Youji Division of Systems Science and Applied Informatics Dept. of Systems Innovation Osaka University Toyonaka Japan

ISBN: (纸本)0780392833

A periodic radial basis function (RBF) network is proposed based on the regularization approach. The periodic RBF network can interpolate discrete data more efficiently than the conventional one since the coefficients of the network can be computed by using the fast Fourier transform (FFT). For the evaluation of the interpolation capability, the frequency response of the periodic RBF network is analyzed. It is then shown that the frequency response is asymptotically equivalent to the ideal sine interpolation, and that the periodic RBF network is closer to the ideal sine interpolation than the cubic spline and Lanczos interpolations. © 2005 IEEE.

关键词： Radial basis function networks

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Finite element analysis of multi-turn magnetoplated coils using homogenization method

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IEEJ Transactions on Power and Energy 2017年第3期137卷 223-229页

作者： Fujita, Shogo Igarashi, Hajime Applied Electromagetics Lab. Research Group of Informatics for System Synthesis Division of Systems Science and Informatics Graduate School of Information Science and Technology Hokkaido University Kita 14 Nishi 9 Kita-ku Sapporo060-0814 Japan

Magnetoplated wires (MPW) are effective to reduce eddy current losses in power devices such as converters and contactless power transfer systems. In the convenient finite element (FE) analysis of MPW, elements must be sufficiently smaller than the skin depth. This results in large number of unknowns. This paper proposes a homogenization method using complex permeability for FE analysis of MP-coils so as to circumvent this problem. The coil impedances obtained by the proposed method with coarse elements are shown to agree well with those computed in the conventional FE analysis with fine elements. © 2017 The Institute of Electrical Engineers of Japan.

关键词： Finite element method

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Time-Domain Finite Element Analysis of Multi-turn Coil with Elliptic Cross Section using based on Homogenization Method

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IEEJ Transactions on Power and Energy 2020年第5期140卷 402-408页

In this paper, a homogenized finite element method for transient analysis of electric apparatus including a multi-turn coil with elliptic cross-section. The tensor-type complex permeability of the multi-turn coil is expanded into partial fractions, which can then be transformed into time-domain. The convolution integral is effectively evaluated using the RC method which does not need large memory storage. It is shown that the power computed by the proposed method is in good agreement with that computed by the conventional finite element method without homogenization. © 2020 The Institute of Electrical Engineers of Japan.

关键词： Finite element method

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Adding Search Queries to Picture Lifelogs for Memory Retrieval

Adding Search Queries to Picture Lifelogs for Memory Retriev...

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2016 IEEE/WIC/ACM International Conference on Web Intelligence, WI 2016

作者： Kubota, Akira Tominaga, Tomu Hijikata, Yoshinori Sakata, Nobuchika Division of Systems Science and Applied Informatics Graduate School of Engineering Science Osaka University 1-3 Machikaneyama Toyonaka Japan

ISBN: (纸本)9781509044702

A picture lifelog is a type of lifelog that consists of pictures, mainly taken by the user. Recently, users have been able to easily create picture lifelogs because many portable devices such as smart phones have a camera. When a user sees a picture in their picture lifelog, it is sometimes difficult to recall the events related to the picture. Therefore, we proposed to combine search queries on a picture lifelog in order to support memory retrieval. Search queries are input into a web search engine to satisfy a user's need for information. Recently, because of the prevalence of smart phones, the opportunity to input search queries has increased to anytime and anywhere. Search queries are stored in a cloud user database such as Google search history. In addition, those search queries imply what the user was thinking at the time. We investigated whether search queries enable a user to recall their thoughts regarding picture lifelogs. Thus, we conducted an experiment to ascertain whether search queries reminded a user of past events. As a result, we reveal that displaying a picture with search queries performed around the time it was taken tends to improve users' memories better than its time, location, or emails sent during that time. © 2016 IEEE.

关键词： Search engines

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Simple method for generating dynamic object map

Simple method for generating dynamic object map

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2008 IEEE International Conference on Robotics and Biomimetics, ROBIO 2008

作者： Ishizuka, Yuusuke Mae, Yasushi Ohara, Kenichi Takubo, Tomohito Arai, Tatsuo Division of Systems Science and Applied Informatics Department of Systems Innovation Graduate School of Engineering Science Osaka University 1-3 Machikaneyama Toyonaka Osaka560-8531 Japan

ISBN: (纸本)9781424426799

In the present paper, we propose a simple generation method of a dynamic object map by the person who does not have professional knowledge about sensors. In the method, a user attaches ultrasonic sensors with RF-ID tags to corners of objects. More than 2 sets of receivers can measure their 3D positons. Dynamic object map is generated by the measurements in real time. The method is evaluated by the inexperience users act to build the map according to the simple procedure. © 2008 IEEE

关键词： Ultrasonic sensors

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Communication analysis of remote collaboration system with arm scaling function

Communication analysis of remote collaboration system with a...

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15th International Conference on Human-Computer Interaction, HCI International 2013

作者： Sakata, Nobuchika Kobayashi, Tomoyuki Nishida, Shogo Division of Systems Science and Applied Informatics Graduate School of Engineering Science Osaka University 1-3 Machikaneyama-cho Toyonaka-city Osaka 560-8531 Japan

ISBN: (纸本)9783642393297

This research focuses on the remote collaboration in which a local worker works with real objects by a remote instructor. In this research area, there are some systems which consist of the ProCam system consisting of a camera and a projector at the work environment and the tabletop system consisting of a display, a depth sensor and a camera at remote instructor environment. As the function enhancement, the system using the scaling method of the embodiment exists. The system makes it possible for instructor to instruct smoothly even to small objects and has an effect on task completion time in the user study of putting smaller block clusters than the size of fingers. We first analyzed the movie of previous experiment again, and then find out the problems the previous work could not solve, and proposed their solution. © 2013 Springer-Verlag.

关键词： Cameras

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Interoperable RT component for object detection and 3D pose estimation for service robots

Interoperable RT component for object detection and 3D pose ...

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2009 IEEE/RSJ International Conference on Intelligent Robots and systems

作者： Jaeil Choi Hideyasu Takahashi Yasushi Mae Kenichi Ohara Tomohito Takubo Tatsuo Arai Division of Systems Science and Applied Informatics Osaka University Japan

Finding objects and tracking their poses are essential functions for service robots, in order to manipulate objects and interact with humans. We present an approach for object detection and 3D pose estimation for autonomous mobile robots, that is suitable for general uses in a modularized robot control system. Our approach extracts local features from the input images, searches for the reference pattern, and then produces the 3D pose in camera coordinate system, using only a single reference image and the 6-DOF pose in it. We have created an RT (Robot Technology) component that can be used in any RT-based system, and developed an algorithm that can extend the range of detection and produce robust pose estimation. For evaluation, we have integrated our vision component in an autonomous robot system with a search-and-grasp task, and tested it with several objects that are found in ordinary domestic environment. We present the details of our approach, the design of our modular component design, and the results of the experiments in this paper.

关键词： Object detection Service robots Robot vision systems Robot kinematics Humans Mobile robots Robot control Feature extraction Cameras Robustness

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An application meta-model to support the execution and benchmarking of scientific applications in multi-cloud environments

An application meta-model to support the execution and bench...

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2017 IEEE SmartWorld Ubiquitous Intelligence and Computing, Advanced and Trusted Computed, Scalable Computing and Communications, Cloud and Big Data Computing, Internet of People and Smart City Innovation, SmartWorld/SCALCOM/UIC/ATC/CBDCom/IOP/SCI 2017

作者： Ullrich, Markus Lassig, Jorg Aida, Kento Sun, Jingtao Tanjo, Tomoja Gaedke, Martin Department of Computer Science University of Applied Sciences Zittau/Görlitz Germany Information Systems Architecture Science Research Division National Institute of Informatics Germany Department of Computer Science Technische Universität Chemnitz Germany

ISBN: (纸本)9781538604342

Cloud computing has proven its importance to scientists around the globe on many occasions already. However, as it is still a rather new technology for many users, the cloud represents another layer of complexity in any workflow. As a lot of research confirms, especially the efficient provision and management of resources in the cloud is a very complex but also very rewarding task. Upon surveying the research in this area we observed many differences in applied methodologies and application cases which impede not only the comparison of these approaches but also the collective usage of the obtained results, e.g. for more accurate resource estimation algorithms that require less additional benchmarks. We propose a novel application and resource meta-model to model not only applications but also the underlying resource infrastructure for application benchmarks in a generic manner. We show how the meta-model is defined and how it can be used to model an application, using a simple web application as an example. We conclude with highlighting the potential benefits of applying this model in different scenarios but also its limits and how it could be expanded in the future. © 2017 IEEE.

关键词： Benchmarking

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Interpolation capability of the periodic radial basis function

Interpolation capability of the periodic radial basis functi...

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International Conference on Information, Communications and Signal Processing

作者： Y. Abe Y. Iiguni Division of Systems Science and Applied Informatics Osaka University Toyonaka Japan

关键词： Interpolation Radial basis function networks Frequency response Computer networks Spline Function approximation Image sampling informatics Technological innovation Fast Fourier transforms

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