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Absolute longitudinal distance measurement verification of a standard polystyrene nanoparticle near a surface in water by means of multi-wavelength evanescent field 22

Absolute longitudinal distance measurement verification of a...

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22nd International Conference of the European Society for Precision engineering and Nanotechnology, EUSPEN 2022

作者： Blattler, Aran Khajornrungruang, Panart Suzuki, Keisuke Baba, Akiyoshi Goto, Daiki Graduate School of Computer Science and System Engineering Mechanical Information Science and Technology Course Kyushu Institute of Technology Fukuoka Japan Department of Intelligent and Control Systems Advanced Mechanical Division Kyushu Institute of Technology Fukuoka Japan Center of Microelectronic System Kyushu Institute of Technology Fukuoka Japan School of Computer Science and System Engineering Advanced Mechanical Course Kyushu Institute of Technology Fukuoka Japan

ISBN: (纸本)9781998999118

In the wet semiconductor process, abrasive nanoparticles are widely used in the chemical mechanical polishing (CMP) process to polish wafer surfaces for high planarization. During polishing, nanoparticles move with a high-speed three-dimensional (3D) position in the solution. In the 3D particles's moving positions, Z is a perpendicular longitudinal distance between the surface to the nanoparticle that plays a significant role in polishing, which could not be measured by general microscopy without longitudinal scanning. To understand nanoparticle phenomena near-surface, we have proposed and developed the apparatus with real-time fastmotion tracking on optical multi-wavelength evanescent fields microscopy to measure the 3D motion of the nanoparticle in water without scanning. In euspen's 2020, we could verify the relative distance ?Z of nanoparticles in water, but the absolute distance Z is unknown yet. In this manuscript, we have therefore developed an invisible nano-step height in water to verify the absolute height Z of an individual nanoparticle. The invisible nano-step height in water is made from an optical resin with a refractive index of 1.35 that is close to a refractive index of water to avoid unnecessary light during experimental verification. The nano-step height was less than 100 nm on a glass surface, fabricated using nanoimprint lithography. Polystyrene f100 nm standard particles in water were used to verify the height Z. The results of height Z of nanoparticles could be measured less than 100 nm with the measurement uncertainty ±10 nm (2s), which is related to the interferometer result of the nano-step height. © European Society for Precision engineering and Nanotechnology, Conference Proceedings - 22nd International Conference and Exhibition, EUSPEN 2022. All rights reserved.

关键词： Nanoparticles

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Channel capacity of multiple-input multiple-output systems with transmit and receive correlation

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Journal of systems engineering and electronics 2008年第1期19卷 21-26页

作者： Wang Jun Zhu Shihua Wang Lei Liu Fang School of Electronics and Information Engineering Xi'an Jiaotong Univ. Xi'an 710049 P. R. China Beijing Communications Laboratories Co. Ltd. Advanced Wireless System Lab Beijing 100080 P. R. China

In order to investigate the impact of channel model parameters on the channel capacity of a multipleinput multiple-output （MIMO） system, a novel method is proposed to explore the channel capacity under Rayleigh fiat fading with correlated transmit and receive antennas. The optimal transmitting direction which can achieve maximum channel capacity is derived using random matrices theory. In addition, the closed-form expression for the channel capacity of MIMO systems is given by utilizing the properties of Wishart distribution when SNR is high. Computer simulation results show that the channel capacity is maximized when the antenna spacing increases to a certain point, and furthermore, the larger the scattering angle is, the more quickly the channel capacity converges to its maximum. At high SNR （〉12 dB）, the estimation of capacity is close to its true wlue. And, when the same array configuration is adopted both at the transmitter and the receiver, the UCA yields higher channel capacity than ULA.

关键词： multiple input multiple output channel capacity spatial correlation channel state information

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Modelling a moving land-sea boundary using adaptive mesh refinement 10

Modelling a moving land-sea boundary using adaptive mesh ref...

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10th Coasts, Marine Structures and Breakwaters Conference 2013: From Sea to Shore - Meeting the Challenges of the Sea

作者： Furuyama, Shoichi Maihara, Yusuke Dept. of Electronics and Information Engineering Toyama National College of Technology 1-2 Ebie-Neriya Imizu Toyama933-0293 Japan Toyama National College of Technology Advanced Course of Control Information System Engineering 1-2 Ebie-Neriya Imizu Toyama933-0293 Japan

ISBN: (纸本)9780727759771

High resolution calculation for the Tsunami run-up simulation at Toyama-bay in Japan is achieved by using Adaptive Mesh Refinement (AMR) method. The method is tested at Hamana-lake for the tide simulation, the water level rising simulation at Toyama-bay and Tsunami runs-up simulation at Toyama-bay. AMR generated the fine mesh at the boundary line between the water and the land. In the case of the tide simulation at Hamana-lake, the reasonably agreement result with the experimental data was given by using the AMR. In the case of water level rising simulation, the method kept the reasonably constant of the total number of calculation meshes by deleting the fine meshes at the far from the interested region, and the method was applied Tsunami run-up simulation at the Toyama-bay.

关键词： Water levels

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1080-Nm dispersion-managed figure-8 fiber laser with a phase-biased nonlinear amplifying loop mirror

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Optics Communications 2025年 589卷

作者： Gao, Kong Dong, Li Pan, Zhongben Chu, Hongwei Pan, Han Wang, Aimin Liu, Yizhou Li, Dechun School of Information Science and Engineering Shandong University Qingdao266237 China College of Physics Science Qingdao University Qingdao266071 China State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing100871 China Center for Optics Research and Engineering Shandong University Qingdao266237 China

We report on a dispersion-managed figure-8 fiber laser with a phase-biased nonlinear amplifying loop mirror (NALM). This figure-8 fiber laser incorporated a non-reciprocal phase bias and an unparallel grating pair in the optical cavity, enabling a self-starting mode-locking state with good wavelength tunability. Numerical simulations were employed to simulate the optical dynamics of the mode-locking laser pulse inside the fiber cavity, indicating the evolution of the spectral bandwidth, pulse duration, and pulse energy at different intracavity positions. A 26.4-MHz, 1080.3-nm mode-locking laser was realized from experiment based on the numerical results. The output powers delivered from the polarization beam splitter (PBS) and the fiber output coupler (FOC) were 1.04 mW and 0.15 mW, with the corresponding pulse durations of 0.97 ps and 0.84 ps, respectively. The integrated relative intensity noise (RIN) of the 1080.3-nm mode-locking laser was 0.059 % [10 Hz, 1 MHz]. The central wavelength of the figure-8 mode-locking fiber laser can be further tuned from 1040.8 nm to 1083.6 nm, based on the intracavity optical spectral filter introduced by the grating pair. This work can provide a reliable seed source for high-energy fiber laser systems. © 2025 Elsevier B.V.

关键词： Laser mirrors

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Proposal of a novel peeling of nano-particle (PNP) process for localized material removal on a hard material surface by controllable magnetic fields 22

Proposal of a novel peeling of nano-particle (PNP) process f...

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22nd International Conference of the European Society for Precision engineering and Nanotechnology, EUSPEN 2022

作者： Permpatdechakul, Thitipat Khajornrungruang, Panart Suzuki, Keisuke Kutomi, Shotaro Graduate School of Computer Science and System Engineering Mechanical Information Science and Technology Course Kyushu Institute of Technology Fukuoka Japan Department of Intelligent and Control Systems Avanced Mechanical Division Kyushu Institute of Technology Fukuoka Japan School of Computer Science and System Engineering Advanced Mechanical Course Kyushu Institute of Technology Fukuoka Japan

ISBN: (纸本)9781998999118

This article proposes a novel Peeling of Nano-Particle (PNP) process to locally remove material on a hard material surface using controllable magnetic fields. Fe3O4 particles in the size range of 50-100 nm in aqueous solution (pH value 11 adjusted by KOH) were magnetically controlled to adhere and remove from a 4H-SiC surface by two electromagnetic coils, which were sandwiched between the substrate. The particle controlling phenomenon on the surface was experimentally observed and verified by our developed apparatus applying an evanescent field. According to the results, particles could be controlled to approach and remove from the substrate surface with 12mT of magnetic field at the selective area on the substrate surface to realise the proposed PNP process. © European Society for Precision engineering and Nanotechnology, Conference Proceedings - 22nd International Conference and Exhibition, EUSPEN 2022. All rights reserved.

关键词： Magnetic fields

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Feasibility Study on a γ-rays Source Detector by Image Processing Technology

Feasibility Study on a γ-rays Source Detector by Image Proc...

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2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018

作者： Yokoyama, Kai Tenzou, Hideki Nagoshi, Ayumi Kunimi, Yusuke Takemoto, Ibuki Miyatake, Tatsuhiko Advanced Course in Electronics Information and Communication Engineering National Institute of Technology Kagawa College Mitoyo Japan Department of Electronic Systems Engineering National Institute of Technology Kagawa College Mitoyo Japan

ISBN: (纸本)9781538684948

The purpose of this feasibility study was to assess a new image processing technology to detect γ-rays sources by using a cloud chamber. A simple cloud chamber was built to generate alcohol super saturation state. A few mm tracks are generated by incident γ-rays in the cloud chamber and the number of tracks is proportional to the number of incident γ-rays. The images in the cloud chamber were captured by a USB camera connected to a PC and the captured images were saved on the PC to manipulate the images. As the concept, lead plates were systematically arranged to shield a part of incident γ-rays. The device has the possibility to distinguish the direction of a γ-rays source by monitoring the difference of an amount of track in each area separated by each lead plate. In this paper, the chamber was used to survey differences of the response for both a point source and a surface source reproduced by some lead collimators approximately. The response for two cases of γ-rays sources was calculated by PHITS simulation code. As a result, it was found that there was enough relationship between dose rate and the amount of the observed tracks of Compton electrons. In comparison with experimental data, PHITS simulation code reproduced the tracks in captured image. The code can be used as the tool to develop the new cloud chamber with some lead plates. © 2018 IEEE.

关键词： Gamma rays

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Analyzing and Recognizing Pedestrian Motion Using 3D Sensor Network and Machine Learning 33rd

Analyzing and Recognizing Pedestrian Motion Using 3D Sensor ...

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33rd International Conference on advanced information Networking and Applications, AINA 2019

作者： Sun, Ningping Tsuruoka, Toru Murakami, Shunsuke Sakamoto, Takuma Department of Human-Oriented Information System Engineering National Institute of Technology Kumamoto College 2659-2 Suya KoshiKumamoto861-1102 Japan Advanced Electronics and Information Systems Engineering Course National Institute of Technology Kumamoto College 2659-2 Suya KoshiKumamoto861-1102 Japan

ISBN: (纸本)9783030150341

How to analyze and recognize pedestrian movements is an important issue dependent on motion capture devices. In our work, we used two types of popular 3D sensors such as 3D depth sensor and 3D motion sensor to construct a sensor network for tacking motion of target because of their convenience and low cost. In this paper, we first describe how to get data from the sensor network and how to process raw data. Next, we provide algorithms for applying machine learning to the analysis and recognition of human motions. Finally, we give some evaluation experimental results. © 2019, Springer Nature Switzerland AG.

关键词： Sensor networks

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Implemantation and evaluation of the gesture interface for object based e-learning system

Implemantation and evaluation of the gesture interface for o...

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2009 4th International Conference on Innovative Computing, information and Control, ICICIC 2009

作者： Nagata, Kazuo Dounoue, Satoshi Koshi, Kazuhiro Miyoshi, Masazumi Kiyota, Kimiyasu Depertment of Information Communication and Electronic Engineering Kumamoto National College of Technology Kumamoto Japan Advanced Course of Electronics and Information Systems Engineering Kumamoto National College of Technology Kumamoto Japan Department of Human-Oriented Information Systems Engineering Kumamoto National College of Technology Kumamoto Japan

ISBN: (纸本)9780769538730

The basis of the e-learning system used in most educational institutions is a character representation by a web browser. This has caused a decrease in usability. It's user interface is not easy for beginners. Therefore, the user comes to have to study the manner of operation of the system before original study. This paper proposes the GI (Gesture Interface) as an operation method for e-learning system. Users can operate e-learning system viscerally by using GI. We have implemented and evaluated some gestures for object based e-learning system that has made on Adobe Flash. This system recognizes two positions and motions of user's fingers from an USB web camera. This allows users to give the system several gestures. © 2009 IEEE.

关键词： User interfaces

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Analysis of the performance of robotic assembly systems considering the usage of tools or jigs for the task-board task in the WRS 2018

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advanced Robotics 2023年第20期37卷 1329-1346页

作者： Dobashi, Hiroki Ogawa, Koki Shibata, Mizuho Uemura, Wataru Yokokohji, Yasuyoshi Faculty of Systems Engineering Wakayama University Wakayama Japan Graduate School of Systems Engineering Wakayama University Wakayama Japan Department of Robotics Faculty of Engineering Kindai University Higashi-Hiroshima Japan Electronics Information and Communication Engineering Course Faculty of Advanced Science and Technology Ryukoku University Otsu Japan Department of Mechanical Engineering Graduate School of Engineering Kobe University Kobe Japan

A task-board task is a task in which robots perform a set of fundamental assembly operations related to the assembly of a specific product such as inserting a part into another part, tightening bolts and nuts, attaching flexible parts, etc. In the task-board task competition in the industrial robotics category of the World Robot Summit (WRS) 2018, 15 teams from around the world performed the task. In our previous work, we observed recorded videos of the competition frame by frame and manually investigated the performance of robotic systems of the top four teams, focusing only on whether robots contact target parts. In this paper, we introduce frame sets to represent mainly contact states between robots, tools, or jigs and target parts to be handled for such a frame-by-frame analysis of the recorded videos, and based on the frame sets, we analyze the performance of robotic assembly systems of other teams as well as the top four teams in the task-board task competition in the WRS 2018, considering the usage of tools or jigs. © 2023 Informa UK Limited, trading as Taylor & Francis Group and The Robotics Society of Japan.

关键词： Robotic assembly

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Resource Allocation in UAV-NOMA Communication systems Based on Proportional Fairness

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Journal of Communications and information Networks 2020年第2期5卷 111-120页

作者： Hui Zhang Baoji Wang Chen Chen Xiang Cheng Hang Li State Key Laboratory of Advanced Optical Communication Systems and Networks Department of ElectronicsSchool of Electronics Engineering and Computer SciencePeking UniversityBeijing 100871China Shanghai Institute of Microsystem and Information Tech-nology Chinese Academy of SciencesShanghai 200050China Data-Driven Information System Laboratory Shenzhen Re-search Institute of Big DataShenzhen 518172China

This paper investigates the power allocation problem in non-orthogonal multiple access(NOMA)integrated unmanned aerial vehicle(UAV)communication *** particular,we propose a novel resource allocation scheme to increase the transmission rate of the users that have relatively worse channel state information,while reducing the sum rate *** solve this problem efficiently,we decouple the optimization problem into three ***,we solve the problem of user pairing and subchannel ***,the optimum power proportional factor is derived to allocate transmit power among different users on the same *** last,different subchannels are allocated with appropriate power to improve the performance of the *** results show that the proposed scheme can enjoy a better performance than the benchmark methods since it can achieve a proper trade-off between the system sum rate and the proportional fairness.

关键词： UAV communications NOMA power allo-cation proportional fairness

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