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Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace systems 2024

作者： Guo, Han-Kun Hsu, Yu-Hsiang Lee, Chih-Kung Department of Engineering Science & Ocean Engineering National Taiwan University Taiwan Institute of Applied Mechanics National Taiwan University Taiwan Graduate School of Advanced Technology No. 1 Sec. 4 Roosevelt Rd. Taipei106 Taiwan

ISBN: (数字)9781510672055

ISBN: (纸本)9781510672048

In this paper, we report a method to control the rotational action of a planer-type piezoelectric motor. The motor is a planer-type piezoelectric actuator that uses two bending modes to create multi-directional traveling waves. The structure is simple and cost-effective. The multi-integer Frequency, Two-Mode method is used to drive the x- or y-directors, and the One-Frequency Two-Mode method is used to drive the motor rotates with respect to the z-axis. To control the multi-directional motorization of this motor in the x and y directions, we integrate a gyroscope to perform a precision directional control with feedback control. The gyroscope senses the rotational signal with respect to the z-axis, and the angular rotational signal is used to monitor the movement of the motor. The design and experimental studies on the multi-directional piezoelectric linear motor are discussed in this paper. © 2024 SPIE.

关键词： Piezoelectric actuators

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Energy-aware Coverage Path Planning of Multi-UAV Based on Relative Distance Scaling Cluster Method 8

Energy-aware Coverage Path Planning of Multi-UAV Based on Re...

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8th IEEE International Conference on advanced Robotics and Mechatronics, ICARM 2023

作者： Liu, Shen Li, Xiuxian Meng, Min Gong, Xin College of Electronics and Information Engineering The Shanghai Research Institute for Intelligent Autonomous Systems Tongji University Department of Control Science and Engineering Shanghai201800 China School of Cyber Science and Engineering Southeast University Nanjing210096 China The University of Hong Kong Department of Mechanical Engineering 999077 Hong Kong

ISBN: (纸本)9798350300178

In recent years, unmanned aerial vehicle (UAV) aerial photography becomes a new method of disaster area exploration. UAVs have been widely used in the fields for aerial photography, monitoring, transportation, communication and so on. They can expand the dimension and scale of search and rescue (SAR) work, reduce the cost of human and material resources, and improve the efficiency of SAR work. Considering the limited of a single UAV, multi-UAV and energy-aware path planning algorithms are proposed here for SAR missions, which improve the cluster algorithm. In the algorithm design, we take the energy consumption of each UAV as an important factor for optimizing the division of search area, and propose the spiral search path generation algorithm. And numerical examples corroborate the effectiveness of the theoretical results. © 2023 IEEE.

关键词： Aerial photography

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Attention U-Net for denoising the multiplexed Digital Holographic Microscopy

Attention U-Net for denoising the multiplexed Digital Hologr...

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3D Image Acquisition and Display: Technology, Perception and Applications, 3D 2024 - Part of Optica Imaging Congress

作者： Dodda, Vineela Chandra Kuruguntla, Lakshmi Kumar, Manoj Matoba, Osamu Muniraj, Inbarasan Department of Electronics and Communication Engineering Amrita School of Engineering Amaravati Amrita Vishwa Vidyapeetham Andhra Pradesh 522503 India Vaddeswaram522302 India Center of Optical Scattering Image Science Graduate School of System Informatics Department of Systems Science Kobe University Rokkodai 1-1 Kobe Nada657-8501 Japan Department of Electronics and Communication Engineering LiFE Lab Alliance School of Applied Engineering Alliance University Karnataka Bengaluru562106 India

Here, we demonstrate the efficacy of an attention-based U-Net architecture for denoising the reconstructed noisy amplitude and phase from a multi-beam interference-based digital holographic microscopy. The results dem... 详细信息

关键词： Holography

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Method to Design Power and Energy Capacity of Onboard Energy Storage Device for Emergency Operation Based on Simple Formulation

Method to Design Power and Energy Capacity of Onboard Energy...

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作者： Kobayashi, Hiroyasu Kondo, Keiichiro Miyatake, Masafumi Koseki, Takafumi Department of Electrical and Electronic Engineering Graduate School of Engineering Chiba University 1-33 Yayoi-cho Inage-ku Chiba-shi Chiba263-8522 Japan School of Advanced Science and Engineering Department of Electrical Engineering and Bioscience Waseda University 3-4-1 Okubo Shinjuku-ku Tokyo169-8555 Japan Department of Engineering and Applied Sciences Faculty of Science and Technology Sophia University 7-1 Kioicho Chiyoda-ku Tokyo102-8554 Japan Department of Electrical Engineering and Information Systems Graduate School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan

Recently, energy storage devices (ESDs) have been introduced to railway vehicles to operate even in an emergency case, such as a power outage. However, there have been no proposals for simultaneous design methods of power capacity and energy capacity of onboard ESD for emergency operation. In this paper, a model for the calculation of power and energy capacity of onboard ESD, which are utilized in an emergency case, is proposed. Furthermore, we propose a method to design the power and energy capacity of onboard ESD by considering the required power for traction and an auxiliary power supply system. © 2023 The Institute of Electrical Engineers of Japan.

关键词： Energy storage

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Proton Collective Quantum Tunneling Induces Anomalous Thermal Conductivity of Ice under Pressure

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Physical Review Letters 2024年第26期132卷 264101-264101页

作者： Yufeng Wang Ripeng Luo Jian Chen Xuefeng Zhou Shanmin Wang Junqiao Wu Feiyu Kang Kuang Yu Bo Sun Tsinghua Shenzhen International Graduate School Department of Physics and Academy for Advanced Interdisciplinary Studies Department of Materials Science and Engineering Materials Sciences Division

Proton tunneling is believed to be nonlocal in ice, but its range has been shown to be limited to only a few molecules. Here, we measured the thermal conductivity of ice under pressure up to 50 GPa and found it increases with pressure until 20 GPa but decreases at higher pressures. We attribute this nonmonotonic thermal conductivity to the collective tunneling of protons at high pressures, supported by large-scale quantum molecular dynamics simulations. The collective tunneling loops span several picoseconds in time and are as large as nanometers in space, which match the phonon periods and wavelengths, leading to strong phonon scattering at high pressures. Our results show direct evidence of global quantum motion existing in high-pressure ice and provide a new perspective to understanding the coupling between phonon propagation and atomic tunneling.

关键词： Dynamical phase transitions Dynamical tunneling Geophysics Lattice thermal conductivity Phonons Planets & planetary systems

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Exponentially convergent distributed Nash equilibrium seeking for constrained aggregative games

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Autonomous Intelligent systems 2022年第1期2卷 71-78页

作者： Shu Liang Peng Yi Yiguang Hong Kaixiang Peng Department of Control Science&Engineering Tongji UniversityShanghai200092China Shanghai Research Institute for Intelligent Autonomous Systems Shanghai201210China School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing100083China

Distributed Nash equilibrium seeking of aggregative games is investigated and a continuous-time algorithm is *** algorithm is designed by virtue of projected gradient play dynamics and aggregation tracking dynamics,and is applicable to games with constrained strategy sets and weight-balanced communication *** key feature of our method is that the proposed projected dynamics achieves exponential convergence,whereas such convergence results are only obtained for non-projected dynamics in existing works on distributed optimization and equilibrium *** examples illustrate the effectiveness of our methods.

关键词： Distributed algorithms Aggregative games Projected gradient play Weight-balanced graph Exponential convergence

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Boolean Matching Reversible Circuits: Algorithm and Complexity 24

Boolean Matching Reversible Circuits: Algorithm and Complexi...

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61st ACM/IEEE Design Automation Conference, DAC 2024

作者： Chen, Tian-Fu Jiang, Jie-Hong Roland Graduate School of Advanced Technology National Taiwan University Taipei Taiwan Graduate Institute of Electronics Engineering National Taiwan University Taipei Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan Center for Quantum Science and Engineering National Taiwan University Taipei Taiwan Physics Division National Center for Theoretical Sciences Taipei Taiwan

ISBN: (纸本)9798400706011

Boolean matching is an important problem in logic synthesis and verification. Despite being well-studied for conventional Boolean circuits, its treatment for reversible logic circuits remains largely, if not completely, missing. This work provides the first such study. Given two (black-box) reversible logic circuits that are promised to be matchable, we check their equivalences under various input/output negation and permutation conditions subject to the availability/unavailability of their inverse circuits. Notably, among other results, we show that the equivalence up to input negation and permutation is solvable in quantum polynomial time, while its classical complexity is exponential. This result is arguably the first demonstration of quantum exponential speedup in solving design automation problems. Also, as a negative result, we show that the equivalence up to both input and output negations is not solvable in quantum polynomial time unless UNIQUE-SAT is, which is unlikely. This work paves the theoretical foundation of Boolean matching reversible circuits for potential applications, e.g., in quantum circuit synthesis. © 2024 Copyright is held by the owner/author(s). Publication rights licensed to ACM.

关键词： Polynomial approximation

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Vertebral Force Prediction during Manual Lifting using Sagittal Plane Posture and Machine Learning 13

Vertebral Force Prediction during Manual Lifting using Sagit...

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13th IEEE Global Conference on Consumer Electronic, GCCE 2024

作者： Kitagawa, Kodai Hida, Mitsumasa Wada, Chikamune Yamamoto, Hiroaki Hachinohe College Hachinohe National Institute of Technology Department of Industrial Systems Engineering Hachinohe Japan Osaka Kawasaki Rehabilitation University Department of Rehabilitation Kaizuka Japan Graduate School of Life Science and Systems Engineering Kyushu Institute of Technology Kitakyushu Japan Fukuoka Tenjin Medical Rehabilitation Academy Department of Physical Therapy Fukuoka Japan

ISBN: (纸本)9798350355079

Vertebral force during manual lifting causes lower back pain (LBP) among workers in various occupational fields. Continuous monitoring of vertebral force is required for preventing LBP. Vertebral force can be measured directly by implant devices;however, these implant devices are difficult to install on general workers. Non-invasive technologies such as an optical motion capture system could estimate vertebral force, however, special measurement devices are necessary. The objective of this study is to propose non-invasive measurement method for vertebral force using ordinary digital camera. The proposed method predicts vertebral forces by machine learning and sagittal plane posture during manual lifting. The proposed method predicted vertebral forces for 48 trials manual lifting via leave-one-out-cross-validation. Training and testing of the proposed method used OrthoLoad database that included sagittal 2D images and vertebral force obtained from implant device. The results showed that the proposed method using model tree algorithm could predict vertebral force by greater than 0.7 correlation with actual values. These results indicate possibility that the proposed method can be used for vertebral force assessments using ordinary devices. © 2024 IEEE.

关键词： Digital cameras

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An IoT-enabled monitoring and control system for electrochromic smart windows

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Discover Internet of Things 2024年第1期4卷 30页

作者： Koay, Hsien-Hern Thien, Gregory Soon How Au, Benedict Wen-Cheun Abdelhamed, Abdelrahman Hamed Ebrahem Balachandran, Ruthramurthy Ng, Zi-Neng Chan, Kah-Yoong Centre for Advanced Devices and Systems Faculty of Engineering Multimedia University Selangor Cyberjaya63100 Malaysia Micron Semiconductor Asia Operations Pte Ltd. 1 North Coast Drive Singapore757432 Singapore Sri Desa International Secondary School Taman Desa Kuala Lumpur58100 Malaysia Department of Electronics and Communication Engineering School of Electrical Engineering and Computing Adama Science and Technology University P O Box 1888 Adama Ethiopia School of Electrical Engineering and Artificial Intelligence Xiamen University Malaysia Jalan Sunsuria Bandar Sunsuria Selangor Sepang43900 Malaysia

Electrochromic (EC) smart windows are highly efficient in preventing solar irradiation. Nevertheless, an insufficient automated monitoring and control system for EC windows has been observed. This study outlined the framework for designing a control system that effectively regulated the voltage polarity of an EC smart window. Integrating Internet of Things (IoT) capabilities and environmental sensors enhanced the smart window control system. This integration allowed for automated monitoring and adjustment of light intensity (below and above 30,000 lx), temperature (below and above 32 °C), and UV index (below 3 and above 7) for the smart window. The magnitude of the current supplied from the output load of the operational circuit module was directly correlated with the switching time of the electrochromic window. Moreover, voltage fluctuation was observed during the evaluation testing of the control system, which was ascribed to the reliability of the breadboard platform. This study also provided a functional design analysis for a Wi-Fi-enabled control system, presented insights into manual and automatic control modes under diverse environmental conditions, and improved user interaction through real-time data visualization using the IoT Blynk platform. Overall, this study presented a range of cost-effective approaches for managing the dynamic EC window using Wi-Fi and sensor-enabled technology. © The Author(s) 2024.

关键词： Wi-Fi

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Nanoengineering of Curved Supramolecular Polymers:Toward Single-Chain Mesoscale Materials

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Accounts of Materials Research 2022年第2期3卷 259-271页

作者： Sougata Datta Sho Takahashi Shiki Yagai Department of Applied Chemistry and Biotechnology Graduate School of EngineeringChiba UniversityChiba 263-8522Japan Division of Advanced Science and Engineering Graduate School of Engineering and Institute for Global Prominent Research(IGPR)Chiba UniversityChiba 263-8522Japan

CONSPECTUS:Recently,supramolecular polymers(SPs),which depend on the formation of reversible bonds between monomers,have attracted attention as a class of materials that can overcome the potential environmental problems of conventional polymeric *** development of various supramolecular polymers is important not only for their direct application as materials but also because their unique polymerization processes and dynamic properties have a profound influence on the development of polymeric and small-molecule-based functional *** other words,by limiting the dimensionality of molecular assemblies to one dimension,we can discover the essential aspects of selfassembly and *** particular,supramolecular polymerization,in whichπ-electron-rich planar molecules are stacked one-dimensionally via multiple interactions,is interesting because it gives“π-stacked SPs”with one-dimensional crystal-like *** excellent intrinsic(internal)structural order ofπ-stacked SPs is difficult to observe in higher-order structures that exhibit only a monotonous linear ***,our research has shown that when internal structural order intrinsically generates curvature,the curvature appears as a major feature of the entire polymer *** intrinsic curvature allows the formation of diverse topologies such as toroids,random coils,waves,spirals,and helicoids usingπ-stacked SPs and also allows structural changes at the single-polymer-chain level along a topology-dependent energy *** other words,π-stacked SP-based nanomaterials could enable free control of the structure at the single-polymer-chain *** Account will focus on our research into curved supramolecular polymers(CSPs)during the last five *** are formed by the hydrogen bonding between barbituratecontainingπ-conjugated molecules to produce giant supramolecular *** first give an overview of the molecular design of the monomers required for the formation of CSP

关键词： materials curvature bonds

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