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IEEE Global Conference on Consumer Electronics (GCCE)

作者： Kanata Muto Katsuyuki Fujii Yasuyuki Okumura Graduate Program of Mechatronics Graduate School of Science and Engineering Nanzan University Nagoya Japan Nanzan University Nagoya Japan

ISBN: (数字)9781728198026

ISBN: (纸本)9781728198033

When mobile communication terminals are used, miniaturized antennas interact with the human body. For example, a planar inverted-F antenna, which is a typical small antenna, is the result of the application of various miniaturization techniques. In previous research, a multiple folded planer inverted-F antenna working at a 429 MHz band was proposed to be mounted on a housing. However, the evaluation of the performance of this equipment has not been established near the human body. Therefore, in this paper, its behavior is evaluated through simulation and measurement. The specific absorption rate is also evaluated through this simulation.

关键词： Impedance matching Mobile antennas Mobile communication Specific absorption rate Reflection coefficient Antennas Standards

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Control of an autonomous mobile robot in cluttered environments guided by a single CCD camera 2

Control of an autonomous mobile robot in cluttered environme...

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2nd International Conference on Algorithms, Computing and Artificial Intelligence, ACAI 2019

作者： Campos-Garduño, Edgar Tang, Yu Du, Jianming Graduate Program in Engineering UNAM Mexico City Mexico UNAM Faculty of Engineering Mexico City Mexico Mechatronics and Control Engineering Shenzhen University Shenzhen China

ISBN: (纸本)9781450372619

Control of an autonomous robot moving in cluttered environments guided by a single CCD camera is described in this paper. The objective is to guide the mobile robot to arrive at a goal pose (position and orientation) started from an initial pose in the environment where there may be static obstacles that can be observed by the camera. The control scheme consists in three modules: the control module which ensures the exponential tracking to a desired trajectory;the on-line path/trajectory planning module which plans the desired path using LOS (Light-of-Sight) strategy and then parametrizes it into a trajectory;and the depth-estimation module which takes a sequence of target image along the path in the CCD camera mounted in the mobile robot to estimate the target Cartesian coordinate in the inertial frame and passes it to the path/trajectory module. The trajectory tracking controller and the depth observer are devised relying on the contraction analysis ensuring the exponential convergence in both designs. Simulations are included to illustrate the control scheme. © 2019 ACM.

关键词： Navigation

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Self-supervised approach for facial movement based optical flow

arXiv

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arXiv 2021年

作者： Alkaddour, Muhannad Tariq, Usman Dhall, Abhinav Graduate Program in Mechatronics Engineering American University of Sharjah Sharjah United Arab Emirates Department of Electrical Engineering American University of Sharjah Sharjah United Arab Emirates Department of Human Centred Computing Monash University Melbourne Australia Department of Computer Science and Engineering Indian Institute of Technology Ropar Rupnagar India

Computing optical flow is a fundamental problem in computer vision. However, deep learning-based optical flow techniques do not perform well for non-rigid movements such as those found in faces, primarily due to lack of the training data representing the fine facial motion. We hypothesize that learning optical flow on face motion data will improve the quality of predicted flow on faces. The aim of this work is threefold: (1) exploring self-supervised techniques to generate optical flow ground truth for face images;(2) computing baseline results on the effects of using face data to train Convolutional Neural Networks (CNN) for predicting optical flow;and (3) using the learned optical flow in micro-expression recognition to demonstrate its effectiveness. We generate optical flow ground truth using facial key-points in the BP4D-Spontaneous dataset. The generated optical flow is used to train the FlowNetS architecture to test its performance on the generated dataset. The performance of FlowNetS trained on face images surpassed that of other optical flow CNN architectures, demonstrating its usefulness. Our optical flow features are further compared with other methods using the STSTNet micro-expression classifier, and the results indicate that the optical flow obtained using this work has promising applications in facial expression analysis. © 2021, CC BY.

关键词： Optical flows

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A Review: Gravitational Water Vortex Power Plant

A Review: Gravitational Water Vortex Power Plant

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2020 International Conference on Sustainable Energy engineering and Application, ICSEEA 2020

作者： Huwae, Reza Sudibyo, Henny Subekti, Ridwan Arief Susatyo, Anjar Khaerudini, Deni Shidqi Mercu Buana University Program of Study Magister in Mechanical Engineering Jakarta Indonesia Research Centre for Electrical Power and Mechatronics Bandung Indonesia Indonesian Institute of Sciences Research Centre for Electrical Power and Mechatronics Bandung Indonesia Research Center for Physics Serpong Indonesia Department of Physics FMIPA Universitas Indonesia Gedung F Fakultas MIPA Kampus UI Depok Depok Jawa Barat Indonesia

ISBN: (纸本)9781728188492

Significant population and economic growth, caused increasing of energy demand. Depletion of fossil fuel moreover coupled by climate change issue that caused by increasing carbon emission, become necessity to continuously encourage achieving renewable energy mix in energy primer. Large potentials of hydro renewable energy source and small utilization of it, micro-hydro and pico-hydro power plant are suitable to develop especially in country side. The research gap in the current turbine application chart is a challenge for Gravitational Water Vortex Power Plant (GWVPP) strong existence in pico-hydro power, besides conventional turbine design has been developed into it. However, development in vortex flow and basin geometry design has a robust design for the past 10 years of research. Researches have been conducted in few countries that proofed GWVPP has less capital investment and low operational and maintenance cost, however the parameter of the GWVPP still need further development since the power output efficiency still low. Since basin opening and outlet diameter are the main parameters to define basin geometry, inlet channel need to do further research. The research will improve the recent gaps;therefore, vortex turbine could be developed accordingly that would result immediate improvements for renewable energy growth in Indonesia through GWVPP. © 2020 IEEE.

关键词： Investments

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Numerical study of bubble size distribution in a Venturi-type microbubble generator

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AIP Conference Proceedings 2024年第1期3069卷

作者： Hilman Syaeful Alam Priyono Sutikno Tubagus Ahmad Fauzi Soelaiman Anto Tri Sugiarto Doctoral Program of Mechanical Engineering Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Jalan Ganesha 10 Bandung 40132 Indonesia Research Center for Smart Mechatronics National Research and Innovation Agency Jalan Sangkuriang Kampus BRIN Gedung 80 Bandung 40135 Indonesia

Venturi tubes have been widely used to produce microbubbles due to their simple and flexible design. However, the design of a Venturi-type microbubble generator remains a challenge. The majority of studies are carried out experimentally with relatively high development time and costs. In this paper, a numerical model was proposed to evaluate the bubble size distribution in the Venturi tube based on variations of flow parameters and geometry. A numerical model was developed using a combination of computational fluid dynamics (CFD) and the population balance method (PBM). The CFD-PBM coupled simulation involved several combinations of turbulence models, bubble aggregation, and breakage to produce a model with high accuracy and flexibility. Based on the simulation results, the combination of the RNG k-ε turbulence model, Turbulence aggregation, and Lehr breakage model has the best accuracy. In addition, the model has high flexibility even though it uses a low number of meshing elements. Therefore, the proposed model can be utilized in the design and development of a Venturi-type microbubble generator using a virtual prototype to minimize development costs and subsequently applied on a larger scale.

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Sag and Flicker Reduction Using Hysteresis-Fuzzy Control-Based SMES Unit

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Canadian Journal of Electrical and Computer engineering 2019年第1期42卷 52-57页

作者： Yunus, A. M. Shiddiq Habriansyah, Imran Abu-Siada, Ahmed Masoum, Mohammad A.S. Energy Conversion Study Program Mechanical Engineering Department State Polytechnic of Ujung Pandang Makassar90245 Indonesia Mechatronics Study Program Mechanical Engineering Department State Polytechnic of Ujung Pandang Makassar90245 Indonesia Electrical and Computer Engineering Department University of Curtin University BentleyWA6102 United States Department of Engineering Utah Valley University OremUT84058 United States

The issue of power quality is one of the prominent factors in determining the reliability of power systems. It is inevitable to consider power quality issues and include appropriate mitigation techniques in the design of any future power system project construction. Voltage sag and flicker are the two most common short disturbance types of power quality issues that frequently occur in power systems. A widely accepted mitigation strategy to enhance the power quality of disturbed networks is by connecting a flexible ac transmission system. In this paper, a superconducting magnetic energy storage (SMES) unit along with hysteresis-fuzzy controller to suppress the severe impacts of voltage sag and flicker events on the power quality of a power system is proposed, implemented, and tested. The proposed SMES configuration with hysteresis current control and fuzzy logic controller is effective, simple, and easy to implement. Simulation results show the ability of the proposed SMES controller in compensating sag and/or flicker distortions. © 2003-2010 IEEE Canada.

关键词： Power quality

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Techniques of Indoor Positioning Systems (IPS): A Survey

Techniques of Indoor Positioning Systems (IPS): A Survey

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2019 Advances in Science and engineering Technology International Conferences, ASET 2019

作者： Alkhawaja, Fares Jaradat, Mohammad Romdhane, Lotfi Mechatronics Graduate Program College of Engineering American University of Sharjah P.O Box 26666 Sharjah United Arab Emirates

ISBN: (纸本)9781538682715

Indoor Localization has been a challenging task in robotics for years, due to the obstruction of the GPS signals. Although multiple techniques have been proposed, determining the best among them is still highly dependent on applications and no best solution is agreed on. One technique, researchers and developers are adopting -especially in the robotics field-, is the visual/inertial sensor fusion. However, the high number of these systems and their diversity, makes selecting the adequate one for an application a challenging task. This paper aims at presenting an exhaustive list indoor positioning techniques with more emphasis on visual/depth sensors, along with some recommendations for selected applications. © 2019 IEEE.

关键词： Robotics

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Near-Infrared I/II Nanophosphors with Cr3+/Ni2+ Energy Transfer for Bioimaging

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Advanced Optical Materials 2023年第15期11卷

作者： Satpathy, Aishwarya Huang, Wen-Tse Chan, Ming-Hsien Su, Ting-Yi Kamiński, Mikolaj Majewska, Natalia Mahlik, Sebastian Leniec, Grzegorz Kaczmarek, Slawomir M. Hsiao, Michael Liu, Ru-Shi Department of Chemistry National Taiwan University Taipei106 Taiwan Nanoscience and Technology Program Taiwan International Graduate Program Academia Sinica and National Taiwan University Academia Road 128 Nankang Taipei115 Taiwan Genomics Research Center Academia Sinica Academia Road Section 2 Nankang Taipei115 Taiwan Institute of Experimental Physics Faculty of Mathematics Physics and Informatics University of Gdansk Wita Stwosza 57 Gdansk80–308 Poland Department of Technical Physics Faculty of Mechanical Engineering and Mechatronics West Pomeranian University of Technology in Szczecin al. Piastow 19 Szczecin70–310 Poland

In the biomedical field, the use of fluorescence imaging in the second near-infrared (NIR-II) region is growing rapidly because it imparts the advantages of reduced autofluorescence and low photon scattering. The advantage of reduced scattering is that it increases penetration depth in vivo and improves imaging clarity. Herein, this work uses mesoporous silica, a biocompatible template that can be easily modified, functionalized, and loaded with drugs for use in several bioapplications. The ZnGa2O4 spinel oxide system is integrated into mesoporous silica and different concentrations of Cr3+ and Ni2+ are loaded in octahedral sites to obtain the highest emission intensity in the NIR-II region at 1285 nm via energy transfer from Cr3+ to Ni2+. Given that only a few nanophosphor systems with emission in the NIR-II region are available, this work attempts to establish emission in the NIR-II and NIR-I regions to obtain images in vivo with an increased penetration depth to 5 mm and improved clarity for bioimaging purposes. This system will open the door for biomedical research on other NIR-II nanophosphors. © 2023 Wiley-VCH GmbH.

关键词： Bioimaging

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Numerical study of cavitating flow in orifices and its effect on spray characteristics

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Journal of Hydrodynamics 2018年第5期30卷 908-919页

作者： Morteza Ghorbani Mechatronics Engineering Program Faculty of Engineering and Natural Science Sabanci University Department of Biomedical Engineering and Health Systems KTH Royal Institute of Technology

The bubbly flow regime inside orifices has significant effects on several applications, and studying its trend along an orifice could be helpful in identifying the flow mechanism in various situations. The flow regime inside an orifice depends on the situation which has been specified for the orifice. Orifice geometry has a considerable effect on bubbly flow in injectors. Meanwhile, spray characteristics are influenced by the fuel flow inside an orifice, which has strong effects on the mixture of fuel-air. In this study, spray characteristics are studied for different values of the orifice angle. The cavitation phenomenon which occurs inside an orifice varies in intensity and patterns at different angles of the orifice and consequently has diverse effects on spray characteristics. The governing equations are solved by the SIMPLE algorithm. The spray flow is modeled by the discrete droplet method（DDM）, the droplet breakup is modeled by the WAVE model, and the primary breakup is modeled by the DIESEL BREAK UP model. In order to generate cavitation phenomenon inside orifices and investigate its effect on spray characteristics, the angle of orifice with respect to the injector body is varied and the problem is studied for different angles of orifice.

关键词： Cavitation iinjector angle microchannel spray

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Control of master slave robotics system using optimal control schemes 18

Control of master slave robotics system using optimal contro...

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18th International Conference on Aerospace Sciences and Aviation Technology, ASAT 2019

作者： Rashad, Sara A Sallam, Mohamed Bassiuny, A.M. Abdel Ghany, A.M. Department of Electromechanical Engineering Mechatronics Program Heliopolis University Cairo Egypt Department of Mechanical Engineering Helwan University Cairo Egypt Department of Electrical Engineering October 6 University Giza Egypt

This paper presents application of Proportional Integral Derivative (PID) and Non-linear PID (NPID) controllers to optimally operate the master slave robotic system. Teleoperation is widely used in different applications, such as surgical robots, underwater vehicles, power lines and even in space. However there are problems in teleoperation systems that may lead to degradation in system performance or even to system instability. This paper presents new and optimal control schemes that can satisfy the required performance, insure system stability and achieve zero tracking error in presence of constant time delay and model approximation. Optimal gains are obtained using the Genetic Algorithm in a systematic way that could be applied to other control schemes. The results proved the effectiveness of both control schemes than the previously applied scheme. The NPID control scheme has better performance, provided position tracking and achieved zero tracking error in less settling time than PID one. The results obtained by the presented control schemes are evaluated based on comparing the system performance using three different types of controllers which are P-like, Genetic PID and Genetic NPID. The study was carried out using MATLAB/SIMULINK 2017a. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Three term control systems

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