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IAC-17.B4.9-GTS.5.8: Design and development of a three-axis controlled helmholtz cage as an in-house magnetic field simulator for cubesats 68

IAC-17.B4.9-GTS.5.8: Design and development of a three-axis ...

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68th International Astronautical Congress: Unlocking Imagination, Fostering Innovation and Strengthening Security, IAC 2017

作者： Goyal, Tushar Batta, Karabee Baranwal, Prerna Awais, Ahmed N.A. More, Niharika Panigrahi, Rudrakh Kaushik, Tushar -Pilani 333031 India Department of Computer Science and Information System BITS Pilani 333031 India Department of Mechanical Engineering BITS Pilani 333031 India Department of Civil Engineering BITS Pilani 333031 India

ISBN: (纸本)9781510855373

Team Anant is the University Student Satellite Team of Birla Institute of Technology and Science, Pilani, India. The paper presents the details of the design and in-house development of a Three-axis Controlled Helmholtz Cage prepared by the members of the Team as an Attitude Determination and Control test bed for CubeSat type Nanosatellites. The testbed has been designed to provide a testing volume of approximately 90 dm3 with uniform magnetic field, which is sufficient to test nanosatellites of up to 3U Size (CalPoly Standard). The maximum designed magnetic field intensity for each coil is 120 iT. The cage has been designed so as to simulate the magnetic field over the entire range of Low Earth Orbits. The paper begins from the very basic coil design requirements with brief analysis of the dimensional requirements and materials to be used. The analysis is complemented with a budget optimization model for a cost-effective setup. The cage has an unconventional but improvised Square-Coil design. The methodology applied for the structure design and assembly of the cage has been presented in a thorough manner. Brief information about the internal and external, software and hardware connections has been provided. All other relevant information has been presented to provide a step by step guide for the development of the cage. Aluminum Square Pipes and Aluminum Flats were used to prepare the structure of the Cage supplemented by Copper Wire for the production of the field. MATLAB is used to determine the Magnetic Field Intensities along the orbit which are then translated in real time to current intensities on the three pair of Coils. A brief assessment of the circuitry used for producing the required currents is also presented. The system is able to perform as expected in common configurations and is able to produce the desirable field in all three axes. The paper concludes with the experimental data obtained during the preliminary testing of the structure of the cage. ©

关键词： Magnetic fields

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Data Mining: The Classification Method to Predict the Types of Motorcycle Spare Parts to be Restocked

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IOP Conference Series: Materials Science and engineering 2019年第2期662卷

作者： S L B Ginting Y R Ginting Sutono A Rakhman Computer System Study Program Faculty of Engineering and Computer Science Universitas Komputer Indonesia Jl. Dipati Ukur 112-116 Bandung 40132 Indonesia Department of Mechanical Engineering Universitas Riau Kampus Bina Widya KM 12 5 Simpang Baru Pekanbaru 28293 Indonesia

The research intends to create an application which is able to analyse sales data in a motorcycle company to predict the types of spare parts which should be stocked. This prediction is crucial since problems are often encountered while restocking. For instance, when there have been some imprecisions occurring in deciding regarding the types of spare parts to restock, the spare parts accumulate. It can cause inefficiency in terms of storage, the products quality deteriorates due to having been stored for too long, and sometimes the best-selling products are not available in the warehouse. This application is developed with Naïve Bayes Classifier (NBC) method which has a high accuracy in predicting future occurrences. This method works by calculating the probability value in each attribute class and determining the optimal probability value. From the test results, 4500 training data with 200 sample test data has 90% similarity with the results of the restock decision without application. For 500 test data, the similarity was 96%. It is proven that this method has a high accuracy so that it can help the decision makers solved the company problem in predicting the types of motorcycle parts to be restocked.

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Author Correction: Wireless multilateral devices for optogenetic studies of individual and social behaviors

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Nature neuroscience 2022年第10期25卷 1394页

作者： Yiyuan Yang Mingzheng Wu Abraham Vázquez-Guardado Amy J Wegener Jose G Grajales-Reyes Yujun Deng Taoyi Wang Raudel Avila Justin A Moreno Samuel Minkowicz Vasin Dumrongprechachan Jungyup Lee Shuangyang Zhang Alex A Legaria Yuhang Ma Sunita Mehta Daniel Franklin Layne Hartman Wubin Bai Mengdi Han Hangbo Zhao Wei Lu Yongjoon Yu Xing Sheng Anthony Banks Xinge Yu Zoe R Donaldson Robert W Gereau Cameron H Good Zhaoqian Xie Yonggang Huang Yevgenia Kozorovitskiy John A Rogers Department of Mechanical Engineering Northwestern University Evanston IL USA. Department of Neurobiology Northwestern University Evanston IL USA. Center for Bio-Integrated Electronics Northwestern University Evanston IL USA. US Army Research Laboratory Aberdeen Proving Ground MD USA. US Army Medical Research Institute of Chemical Defense Aberdeen Proving Ground MD USA. Washington University Pain Center and Department of Anesthesiology Washington University St. Louis MO USA. State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University Shanghai China. Department of Civil and Environmental Engineering Northwestern University Evanston IL USA. Department of Materials Science and Engineering Northwestern University Evanston IL USA. Department of Physics Tsinghua University Beijing China. SURVICE Engineering Belcamp MD USA. Chemistry of Life Processes Institutes Northwestern University Evanston IL USA. Neurolux Inc Evanston IL USA. School of Civil Engineering Southwest JiaoTong University Chengdu China. School of Chemical Engineering and Technology Tianjin University Tianjin People's Republic of China. CSIR-Central Scientific Instruments Organization Ministry of Science & Technology Sector 30-C Chandigarh India. Department of Biomedical Engineering Northwestern University Evanston IL USA. Department of Electronic Engineering Tsinghua University Beijing China. Simpson Querrey Institute & Feinberg Medical School Northwestern University Evanston IL USA. Department of Biomedical Engineering City University of Hong Kong Kowloong Tong Hong Kong. Psychology and Neuroscience Molecular Cellular and Developmental Biology University of Colorado Boulder Boulder CO USA. State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering Mechanics Dalian University of Technology Dalian P.R. China. zxie@***. Department of Mechanical Engineering Northwestern University Evanston IL USA. y-huang@northwest

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Planning the circular motion of a mobile robot by using complex-valued neural network

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2017 International Conference on Artificial Intelligence, ICAI 2017 at 2017 World Congress in computer Science, computer engineering and Applied Computing, CSCE 2017

作者： Ogawa, T. Kagawa, Y. Okazaki, A. Takahashi, T. Department of Electronics and Computer Systems Takushoku University Tokyo Japan Department of Mechanical System Engineering Takushoku University Tokyo Japan Department of Design Takushoku University Tokyo Japan Department of Computer Science Takushoku University Tokyo Japan

ISBN: (纸本)9781601324603

Neural networks extended to complex numbers have been studied. Complex-valued neural networks (CVNNs) can be used for learning geometric mappings in a two-dimensional plane. CVNNs can learn geometric structures sufficiently from lower dimensional data. In this study, we consider determining the path of a mobile robot in a two-dimensional plane by learning. We introduce learning by using a CVNN for planning the circular motion of a point robot that moves in the two-dimensional plane. We demonstrate the effectiveness by simulation. CSREA Press ©.

关键词： Mobile robots

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Self-Induced Backaction Optical Pulling Force

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Physical Review Letters 2018年第12期120卷 123901-123901页

作者： Tongtong Zhu Yongyin Cao Lin Wang Zhongquan Nie Tun Cao Fangkui Sun Zehui Jiang Manuel Nieto-Vesperinas Yongmin Liu Cheng-Wei Qiu Weiqiang Ding Department of Physics Harbin Institute of Technology Harbin 150001 China Department of Electrical and Computer Engineering National University of Singapore 4 Engineering Drive 3 Singapore 117583 Singapore Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province College of Physics and Optoelectronics Taiyuan University of Technology Taiyuan 030024 China Department of Biomedical Engineering Dalian University of Technology Dalian 116024 China Instituto de Ciencia de Materiales de Madrid Consejo Superior de Investigaciones Científicas Campus de Cantoblanco Madrid 28049 Spain Departments of Mechanical and Industrial Engineering and Electrical and Computer Engineering Northeastern University Boston Massachusetts 02115 USA

We achieve long-range and continuous optical pulling in a periodic photonic crystal background, which supports a unique Bloch mode with the self-collimation effect. Most interestingly, the pulling force reported here is mainly contributed by the intensity gradient force originating from the self-induced backaction of the object to the self-collimation mode. This force is sharply distinguished from the widely held conception of optical tractor beams based on the scattering force. Also, this pulling force is insensitive to the angle of incidence and can pull multiple objects simultaneously.

关键词： Electromagnetism mechanical effects of light on material media Photonic crystals Optical microcavities Optical tweezers

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A novel clutch coupled nonholonomic wheeled mobile robot mechanism to mechanically minimize deduced reckoning error

A novel clutch coupled nonholonomic wheeled mobile robot mec...

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IEEE International Symposium on Robotics and Intelligent Sensors (IRIS)

作者： Ammar Nathad Jaya Rajwani Mechanical Engineering NED University of Engineering and Technology Pakistan Computer and Information System Engineering NED University of Engineering and Technology Pakistan

Motion stabilization of mobile robots has been a considerably large area of research in robotics and there are innumerous programming based solutions to cater this issue. It still becomes inconvenient to make wheeled mobile robots (WMR) move autonomously over distances without producing deduced (dead) reckoning error. The WMRs then fail to move without continuous control feedback systems resulting in systematic odometry error. A novel approach for attaining continuously synchronized drive motion and to produce a cost effective mechanical structure, without complex electronic feedback control system is the purpose of our research. This paper presents the existing solutions that have been in practice to mechanically reduce odometry error, a comparative analysis is then evaluated followed with the proposed design. Unlike conventional differential drive mechanisms, it is driven by two independent motors, one generates drive power to all the wheels for linear kinematics, and the other helps achieve the zero degrees rotation using bevel gear arrangement. The robot has the ability to move in a curved trajectory using two motors simultaneously. These mechanisms are electronically controlled by powering the motor, and engaging the electromagnetic clutch attached to the wheel as required. This shows that this robot is flexible and able to perform point-to-point motion effectively.

关键词： Wheels Mobile robots Gears DC motors Robot sensing systems Intelligent sensors

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Corrigendum: Ethanol-controlled peroxidation in liquid-anode discharges (2019 J. Phys. D: Appl. Phys. 52 425205)

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Journal of Physics D: Applied Physics 2021年第22期54卷

作者： Qiang Chen Jiao Lin Xinyi He Hailong Hu Junshuai Li Qing Xiong Bingyan Chen Zhengyong Song Hai Liu Qing Huo Liu Kostya (Ken) Ostrikov Institute of Electromagnetics and Acoustics Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance Department of Electronic Science Xiamen University Xiamen 361005 People's Republic of China College of Physics and Information Engineering Fuzhou University Fuzhou 350116 People's Republic of China Key Laboratory of Special Function Materials and Structure Design of the Ministry of Education and School of Physical Science and Technology Lanzhou University Lanzhou 730000 People's Republic of China State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400044 People's Republic of China Department of Mathematics and Physics Hohai University Changzhou 213022 People's Republic of China School of Civil Engineering Guangzhou University Guangzhou 510006 People's Republic of China Department of Electrical and Computer Engineering Duke University Durham NC 27708 United States of America Institute for Future Environments and School of Chemistry Physics and Mechanical Engineering Queensland University of Technology Brisbane QLD 4000 Australia CSIRO-QUT Joint Sustainable Processes and Devices Laboratory Commonwealth Scientific and Industrial Research Organization PO Box 218 Lindfield NSW 2070 Australia

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Lattices with internal resonator defects

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Physical Review E 2018年第3期98卷 032902-032902页

作者： S. Hauver X. He D. Mei E. G. Charalampidis P. G. Kevrekidis E. Kim J. Yang A. Vainchtein Department of Mathematics and Statistics University of Massachusetts Amherst Massachusetts 01003-4515 USA Department of Electrical and Computer Engineering University of Massachusetts Amherst Massachusetts 01003-4515 USA Department of Aeronautics and Astronautics University of Washington Seattle Washington 98195-2400 USA Division of Mechanical System Engineering Chonbuk National University Jeonju-si Jellabuk-do 54896 Republic of Korea Automotive Hi-Technology Research Center & LANL-CBNU Engineering Institute Korea Chonbuk National University Jeonju-si Jellabuk-do 54896 Republic of Korea Department of Mathematics University of Pittsburgh Pittsburgh Pennsylvania 15260 USA

We consider a variety of settings involving chains with one or more defects stemming from the introduction of nodes bearing internal resonators. Motivated by experimental results in woodpile elastic lattices with one or two defects, we consider a variety of different theoretical scenarios. These include multidefect chains and their ability to transmit, reflect, and especially trap energy. Moreover, they involve defects which are spatially separated and either statically or, more effectively, dynamically enable the confinement of energy between the separated defects. Wherever possible, comparisons of the experiments with numerical simulations as well as with theoretical intuition are also offered, to provide a justification for the observed findings.

关键词： Defects Nonlinear waves Traveling waves

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Temperature-insensitive optical Fabry–Perot flow measurement system with partial bend angle

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Chinese Optics Letters 2017年第4期15卷 9-13页

作者：杨会甲江俊峰王双潘玉恒张学智刘铁根 School of Precision Instrument and Opto-Electronics Engineering Key Laboratory of Micro Opto-electro Mechanical System TechnologyInstitute of Optical Fiber Sensing of Tianjin UniversityTianjin Optical Fiber Sensing Engineering CenterKey Laboratory of Opto-Electronics Information Technology (Tianjin University)Ministry of Education School of Computer and Information Engineering Tianjin Chengjian University

A flow measurement system consisting of an optical fiber Fabry–Perot（F-P） sensor and an elbow tube is proposed and demonstrated to realize flow measurements and eliminate thermal *** F-P sensors are symmetrically mounted on the inner-wall surface of the elbow of 90° in order to eliminate the effect of thermal disturbance to the flow measurement *** results show that the absolute phase difference is the square root of the fluid *** is consistent with the theoretical analysis,which proves that the flow measurement method can measure flow and eliminate the influence of thermal disturbance simultaneously.

关键词： disturbance eliminate insensitive absolute mounted Fabry detecting coherence preliminary straight

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Expression of Concern: Influence of introducing various meteorological parameters to the Angström–Prescott model for estimation of global solar radiation

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Environmental Earth Sciences 2018年第1期78卷 1-1页

作者： Mohammadi, Kasra Khorasanizadeh, Hossein Shamshirband, Shahaboddin Tong, Chong Wen Department of Mechanical and Industrial Engineering University of Massachusetts Amherst USA Faculty of Mechanical Engineering and Energy Research Institute University of Kashan Kashan Iran Department of Computer System and Technology Faculty of Computer Science and Information Technology University of Malaya Kuala Lumpur Malaysia Department of Mechanical Engineering Faculty of Engineering University of Malaya Kuala Lumpur Malaysia

The Editors-in-Chief of Environmental Earth Sciences are issuing an editorial expression of concern to alert readers that this article (Mohammadi et al. 2016) shows substantial indication of irregularities in authorship during the submission process. The authors suggested peer reviewers whose identity was not possible to verify. This article contains overlap with Khorasanizadeh et al. (2013, 2014), Mohammadi et al. (2014), Shamshirband et al. (2016) (amongst others). All authors disagree with this editorial expression of concern.

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