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9th International Conference on Big Data Analytics, ICBDA 2024

作者： Nishimura, Kazuki Ishida, Akio Murakami, Jun Yamamoto, Naoki National Institute of Technology Kumamoto College Advanced Course of Electronics and Information Systems Engineering Kumamoto Japan National Institute of Technology Kumamoto College Faculty of Liberal Arts Kumamoto Japan National Institute of Technology Kumamoto College Faculty of Electronics and Information Systems Engineering Kumamoto Japan

ISBN: (纸本)9798350352962

Gait analysis is used in a wide range of fields, including clinical applications such as diagnosis and rehabilitation, investigation of gender and racial differences, and personal identification, which is important in forensic investigations and security. In recent years, gait data can be obtained from force plates, 3D motion capture, RGB cameras, and so on. In this study, we applied principal component analysis (PCA) to gait data captured with an RGB camera and analyzed the main data characteristics. However, the data used here is joint information whose posture is estimated using neural networks (NN) from gait videos taken with the camera. Furthermore, we created a NN model for personal identification using data whose dimensionality was reduced using PCA and attempted the identification. © 2024 IEEE.

关键词： Phishing

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Color prediction in an lcd using rgb-led backlights 49th

Color prediction in an lcd using rgb-led backlights

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49th SID International Symposium, Seminar and Exhibition, dubbed Display Week, 2012

作者： Choi, Seo Young Park, Du Sik Kim, Chang Yeong Schanda, Janos Kranicz, Balazs Csuti, Peter Advanced Media Lab SAIT Samsung Electronics Yongin-si Korea Republic of Dept. of Electrical Engineering and Information System Univ. of Pannonia Hungary

The CIE standard color matching function is used in the description of color characteristics for stimuli reproduced on displays given that these represent visual sensitivity accurately. If this is not the case, the consequent estimation using the functions would be deviated from what we perceive. This study demonstrates the significant errors caused by applying the current standard color matching function for predicting visual results of color stimuli displayed on an LCD monitor equipped with RGB-LED backlights. The modified version of the standard color matching function is also introduced with its verification results in the reduction of prediction errors. © 2012 SID.

关键词： Forecasting

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Creating 3DCG Animation with a Network of 3D Depth Sensors

Creating 3DCG Animation with a Network of 3D Depth Sensors

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2016 International Conference on Sustainable Energy, Environment and information engineering (SEEIE 2016)

作者： Ning-ping SUN Yohei YAMASHITA Ryosuke OKUMURA Dept. of Human-Oriented Information System Engineering Kumamoto College Advanced Electronics and Information Systems Engineering Course National Institute of TechnologyKumamoto College

The motion capture is a useful technique for creating animations instead of manual labor,but the expensive camera based devices restrict its practical application. The emerging of inexpensive small size of depth-sensing devices provides us opportunities to reconstitute motion capture *** introduced a network of 3D depth sensors into the production of real time 3DCG *** to the existing system, the new system works well for data communication and anime rendering. We discuss below server how communicate with a group of sensors, and how we operate a group of sensors in the rendering of animation. Some results of verification experiments are provided as well.

关键词： Depth sensor Network 3D computer graphics Animation production

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Research on Metamaterial Technology for Microwave Wireless Power Transfer

Research on Metamaterial Technology for Microwave Wireless P...

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2024 International Symposium on Antennas and Propagation, ISAP 2024

作者： Yamamoto, Tsunayuki Kobashi, Takeo Maruyama, Tamami Department of Integrated Science and Technology National Institute of Technology Tsuyama College Tsuyama-shi Japan Advanced Electronics and Information System Engineering Course National Institute of Technology Tsuyama College Tsuyama-shi Japan Department of Production Systems Engineering Institute of Technology Hakodate College Hakodate-shi Japan

ISBN: (纸本)9798350364774

In this paper, two technologies of metamaterial for microwave wireless power transfer are shown. One is a zeroth-order resonance for a microwave snow melting system, and another one is a focusing reflector for realizing of a highly efficient wireless power transfer space. A zeroth-order resonance leads a uniformed microwave heating and a flexibility of feeding in a snow melting system. Focusing reflector can make some electromagnetic hot and null points in a space. These are expected to be required technologies for highly efficient wireless power transfer. © 2024 IEEE.

关键词： Reflection

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A design of bilateral servo system with self-tuning function

A design of bilateral servo system with self-tuning function

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International Conference on advanced Mechatronic systems (ICAMechS)

作者： Hirofumi Ohtsuka Tomoaki Nakamura Dept. of Control and Information System Engineering Kumamoto National College of Technology Kumamoto Japan Kumamoto National College of Technology Advanced Course of Electronics and Information System Engineering Kumamoto Japan

Manual micromanipulation requires for operators to have enough experience and outstanding skill. A bilateral servo system attempts to convert difficult tasks so as to be felt easier for skilled operators. One of such a bilateral servo system, which reduces the displacement and expands the force, has been proposed by Kikuchi and Shiraishi[1]. However, concerning to the offset between a master manipulator's stiffness and a slave manipulator's one, its adverse effects of the operation stability becomes remarkable for the change of operator's dynamics. In an actual use, such offset may cause a heavy damage of the manipulated object by the operation. In this study, we propose a self-tuning mechanism which can eliminate such offset problem. And we have confirmed the effectiveness of the proposed method by numerical simulation.

关键词： Manipulators Force Numerical simulation Servomotors Steady-state

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Research on applied technology with a continues method for unit commitment problem

Research on applied technology with a continues method for u...

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2nd International Conference on Mechanics, Dynamic systems and Material engineering, MDSME 2014

作者： Yang, Lin Feng Li, Jie Ge, Zhi Hui Guangxi Key Laboratory of Manufacturing System and Advanced Manufacturing Technology School of Computer and Electronics and Information Guangxi University Nanning 530004 Guangxi China Department of Computer Electronics and Information Engineering Guangxi Polytechnic Nanning 530226 Guangxi China

ISBN: (纸本)9783038351337

A continue method based on relaxation is applied to solve the unit commitment problem (UCP). At first, the primal UCP is reformulated as a simple mixed integer quadratic programming (MIQP), and then the MIQP is solved by interior point method (IPM) and commercial software CPLEX. The first continues problem, UCP without integer constraints, can be solved by IPM to get the no integer solution. The second continues problem, an equivalent continues problem of UCP, can be solved starting from the solution obtained in first problem. © (2014) Trans Tech Publications, Switzerland.

关键词： Integer programming

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Generation of 47 fs Pulses from an Er:Fiber Amplifier

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Chinese Physics Letters 2017年第7期34卷 101-104页

作者：欧尚明刘关玉雷卉张志刚张庆茂 School of Information Optoelectronics Science and Technology South China Normal University Guangzhou 510006 State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing 100871 Guangzhou Research Institute Of O-M-E Technology Guangzhou 510663

We demonstrate a self-starting erbium fiber oscillator-amplifier system based on the nonlinear polarization rota- tion mode-locked mechanism. The direct output pulse from the amplifier is 47fs with an average power of 1.22 W and a repetition rate of 50 MHz, corresponding to a pulse energy of 24 nJ. The full width at half-maximum of the spectrum of the output pulses is approximately 93nm at a central wavelength of 1572nm so that the transform- limited pulse duration is as short as 39 fs. Due to the imperfect dispersion compensation, we compress the pulses to 47fs in this experiment.

关键词： Generation of 47 fs Pulses from an Er:Fiber Amplifier

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On ambiguity in Coppersmith' attacking method against NIKS-TAS scheme

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IEICE TRANSACTIONS ON FUNDAMENTALS OF electronics COMMUNICATIONS AND COMPUTER SCIENCES 1996年第1期E79A卷 66-75页

作者： Tsujii, S Araki, K Kasahara, M Okamoto, E Sakai, R Maeda, Y Yagisawa, T Department of Information and System Engineering Chuo University Tokyo 112 Japan Department of Electrical and Electronics Engineering Saitama University Urawa-shi 344 Japan Department of Information Science and Design Kyoto Institute of Technology Kyotoshi 606 Japan Japan Advanced Institute of Science and Technology Ishikawa-ken 923-12 Japan Tokyo Institute of Technology Osaka Electro-communication University Artdink Co.

In this paper it is pointed out that although an elegant differential-like approach is developed, Coppersmith' attacking method on NIKS-TAS cannot succeed to forge a shared key of legitimate entities especially when p-1 contains highly composite divisors, as well as decomposibility-hard divisors. This is mainly due to a severe reduction of module size. Computer simulation results confirm this assertion. The ambiguity in the solutions to the collusion equations in the first phase can be analyzed by the elementary divisor theory. Moreover, two basis vectors, q(i),r(i) in the second phase, are found to be inadequate to represent the space spanned by x(i)-y(i) and u(i)-v(i) (i = 1,...,N), because q(i),r(i) exist frequently over the space with small module size. Then, the erroneous values of alpha(i),beta(i),...,epsilon(i) (i = 1,...,N) are derived from the inadequate basis vectors, q(i),r(i). Also, when the degeneracy in module size happens, the solutions to alpha(i),beta(i),...,epsilon(i) (i = 1,...,N) cannot be solved even by means of the exhaustive search over the small prime divisors of p-1.

关键词： modulo degeneracy cryptanalysis ID-based key sharing NIKS-TAS

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Highly Efficient Generation of Non-diffraction Bessel Beams with Metasurface 3

Highly Efficient Generation of Non-diffraction Bessel Beams ...

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3rd IEEE International Conference on Electronic information and Communication Technology, ICEICT 2020

作者： Zeng, Ting Deng, Li Li, Shufang Feng, Botao Beijing Laboratory of Advanced Information Networks Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China College of Electronics and Information Engineering Shenzhen University Shenzhen China

ISBN: (纸本)9781728190457

A reflection metasurface that can generate non-diffraction Bessel beams and achieve anomalous reflection with high efficiency at 5.8 GHz is proposed in this paper. The unit it utilizes has excellent amplitude and phase characteristics, greatly facilitating the construction of the proposed metasurface and laying a solid foundation for the improvement of efficiency. According to non-diffraction theory and anomalous reflection law, two metasurfaces are designed for comparison. The simulation results show that the designed metasurfaces successfully realize the non-diffractive beam with a focusing distance of 126 mm (2.44 λ0), and can bend the normally reflected wave to the direction 10° from the +z direction in a vertical plane 45° away from the +x direction. The average efficiency of the metasurface within the focusing range is as high as 84.5%, thus could be used as radio energy transmission, telecommunication multiplexing and accurate detection devices. © 2020 IEEE.

关键词： Diffraction

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Single-layer reflective metasurface for dual-band OAM multiplexing 4

Single-layer reflective metasurface for dual-band OAM multip...

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4th IEEE International Conference on Electronic information and Communication Technology, ICEICT 2021

作者： He, Xiaoyuan Deng, Li Feng, Botao Beijing Laboratory of Advanced Information Networks Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China College of Electronics and Information Engineering Shenzhen University Shenzhen China

ISBN: (纸本)9781665432030

In this paper, a general scheme is proposed for dual-band orbital angular momentum (OAM) multiplexing based on a single-layer reflective geometric metasurface. As an OAM multiplexer, the proposed metasurface can distinguish different incidences featuring different incident angles, transform them into OAM waves with different topological charges (TCs) and control their reflection angle by modifying the k-space of the incidences simultaneously. In this way, the incidences can be combined into a coaxial beam without mutual interference because of the inherent orthogonality of different OAM modes. To achieve dual-band OAM multiplexing, a single-layer metal-insulator-metal (MIM) meta-atom that can independently impose arbitrary phase profiles on incidences at two different frequencies is designed. Based on it, a geometric metasurface is proposed for multiplexing OAM waves at 7 GHz and 14 GHz simultaneously. The simulated results show that eight independent data channels are created in a broadside beam when eight off-axis incidences carrying different information impinge on the proposed metasurface. This phenomenon indicates that the proposed metasurface can effectively achieve multiplexing by combining frequency and OAM domains to boost the channel capacity in wireless communications. © 2021 IEEE

关键词： Angular momentum

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