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Recent progress in bio-inspired macrostructure array materials with special wettability—from surface engineering to functional applications

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International Journal of Extreme Manufacturing 2024年第1期6卷 208-256页

作者： Zhongxu Lian Jianhui Zhou Wanfei Ren Faze Chen Jinkai Xu Yanling Tian Huadong Yu School of Mechanical and Aerospace Engineering Jilin UniversityChangchun 130022People’s Republic of China Ministry of Education Key Laboratory for Cross-Scale Micro and Nano Manufacturing Changchun University of Science and TechnologyChangchun 130022People’s Republic of China College of Mechanical and Electrical Engineering Changchun University of Science and TechnologyChangchun 130022People’s Republic of China School of Mechanical Engineering Tianjin UniversityTianjin 300350People’s Republic of China School of Engineering University of WarwickCoventry CV47ALUnited Kingdom

Bio-inspired macrostructure array(MAA,size:submillimeter to millimeter scale)materials with special wettability(MAAMs-SW)have attracted significant research attention due to their outstanding performance in many applications,including oil repellency,liquid/droplet manipulation,anti-icing,heat transfer,water collection,and oil–water *** this review,we focus on recent developments in the theory,design,fabrication,and application of bio-inspired *** first review the history of the basic theory of special wettability and discuss representative structures and corresponding functions of some biological surfaces,thus setting the stage for the design and fabrication of bio-inspired *** then summarize the fabrication methods of special wetting MAAs in terms of three categories:additive manufacturing,subtractive manufacturing,and formative manufacturing,as well as their diverse functional applications,providing insights into the development of these ***,the challenges and directions of future research on bio-inspired MAAMs-SW are briefy *** efforts,progress,and breakthroughs from surface engineering to functional applications elaborated herein will promote the practical application of bio-inspired MAAMs-SW.

关键词： macrostructure arrays superhydrophobic 3D printing laser droplet manipulation

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A Novel Design of Thin Flexible Force Myography Sensor Using Weaved Optical Fiber: A Proof-of-Concept Study

A Novel Design of Thin Flexible Force Myography Sensor Using...

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International Conference on Ubiquitous Robots (UR)

作者： Chongyoung Chung Heeju Mun S. Farokh Atashzar Ki-Uk Kyung Department of Mechanical Engineering Korea Advanced Institute of Science and Technology Daejeon South Korea Department of Mechanical and Aerospace Engineering New York University (NYU) New York NY USA Department of Electrical and Computer Engineering Mechanical and Aerospace Engineering and Biomedical Engineering New York University (NYU) New York NY USA NYU WIRELESS Center and NYU CUSP Brooklyn NY USA Mechanical Engineering Department Korea Advanced Institute of Science and Technology (KAIST) Daejeon South Korea Electrical and Computer Engineering New York University (NYU) New York NY USA

ISBN: (数字)9798350361070

ISBN: (纸本)9798350361087

Motion recognition and tracking is one of the crucial features for intuitive and direct human-robot interaction (HRI), prompting researchers to explore various sensor types. In this paper, we proposed a sleeve-type force myography (FMG) system using new type of thin and flexible FMG sensor utilizing weaved optical fiber. This study introduces a novel design for a thin and flexible FMG sensor using weaved plastic optical fibers for motion recognition and tracking. The proposed sensor demonstrates a compact form factor (15 mm width, 25 mm height, and 2 mm thickness) with high flexibility, making it suitable for embedding in clothing without causing discomfort. Evaluations confirm its high sensitivity, wide force sensing range (>10 N). Accuracy of the estimating force using the proposed sensor was approximately 99.17% or higher and the response time of 85 ms ensures its effectiveness in real-time applications, emphasizing its potential for applications like prosthetics and virtual reality (VR) interactions. To conduct the proof of concept for the FMG sensor, elbow flexion angle estimation was performed focusing solely on the bicep muscle, and high-precision flexion angle tracking was achieved with 94.27% of correlation coefficient. Overall, the proposed FMG sensor presents a promising solution for intuitive and accurate motion recognition in various HRI applications.

关键词： Accuracy Sensitivity Tracking Force Human-robot interaction Virtual reality Robot sensing systems

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Optimisation of alloy composition for highly-formable magnesium sheet

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International Journal of Minerals,Metallurgy and Materials 2022年第7期29卷 1388-1395页

作者： Zhuoran Zeng Mingzhe Bian Shiwei Xu Weineng Tang Chris Davies Nick Birbilis Jianfeng Nie College of Engineering and Computer Science Australian National UniversityACT.2601Australia Department of Materials Science and Engineering Monash UniversityVIC 3800Australia State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China Research Institute(R&D Center) Baosteel Group CorporationShanghai 201999China Department of Mechanical and Aerospace Engineering Monash UniversityVIC 3800Australia

The effectiveness of Ca or Gd addition on ductility and formability of Mg-Zn-Zr based dilute alloys in deep drawing has not been systematically compared *** this study,formable Mg-Zn-Gd-Zr and Mg-Zn-Ca-Zr sheet alloys are produced by hot *** sheets have similarly weakened basal texture,but the sheet of the Mg-Zn-Gd-Zr alloys has higher ductility and formability than that of Mg-Zn-Ca-Zr *** combined addition of 0.2wt%Ca and 0.4wt%Gd to the Mg-1Zn-0.5Zr(wt%)alloy leads to a Mg-1Zn-0.4Gd-0.2Ca-0.5Zr alloy that has even better ductility,and its formability during deep drawing is comparable to the benchmark Al6016 *** increase in Ca content from 0.2wt%to 0.5wt%leads to decreased sheet ductility and formability,predominantly due to grain boundary embrittlement.

关键词： magnesium sheet alloy texture microstructure formability solute segregation

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Characterizing Compositionality of LQR from the Categorical Perspective

Characterizing Compositionality of LQR from the Categorical ...

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IEEE Conference on Decision and Control

作者： Baike She Tyler Hanks James Fairbanks Matthew Hale Department of Mechanical and Aerospace Engineering University of Florida Department of Computer and Information Science and Engineering University of Florida

Composing systems is a fundamental concept in modern control systems, yet it remains challenging to formally analyze how controllers designed for individual subsystems can differ from controllers designed for the composition of those subsystems. To address this challenge, we propose a novel approach to composing control systems based on resource sharing machines, a concept from applied category theory. We use resource sharing machines to investigate the differences between (i) the linear-quadratic regulator (LQR) designed directly for a composite system and (ii) the LQR that is attained through the composition of LQRs designed for each subsystem. We first establish novel formalisms to compose LQR control designs using resource sharing machines. Then we develop new sufficient conditions to guarantee that the LQR designed for a composite system is equal to the LQR attained through composition of LQRs for its subsystems. In addition, we reduce the developed condition to that of checking the controllability and observability of a certain linear, time-invariant system, which provides a simple, computationally efficient procedure for evaluating the equivalence of controllers for composed systems.

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Leveraging Wavelets and Deep CNN for Sleep Pattern Recognition in Road Safety: An EEG Study 1

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6th International Conference on Recent Trends in Image Processing and Pattern Recognition, RTIP2R 2023

作者： Arif, Saad Munawar, Saba Marie, Rashiq Rafiq Shah, Syed Aziz Department of Mechanical Engineering HITEC University Taxila47080 Pakistan Department of Electrical and Computer Engineering COMSATS University Islamabad Wah Campus Wah Cantt47040 Pakistan College of Computer Science and Engineering Taibah University Medina41477 Saudi Arabia Research Centre for Intelligent Healthcare Coventry University CoventryCV1 5FB United Kingdom

ISBN: (数字)9783031530821

ISBN: (纸本)9783031530814

A major cause of fatal traffic accidents and injuries worldwide is drowsy driving. The fatal aftereffects can be considerably reduced, and road safety can rise, with earlier and more efficient diagnosis. In this study, electroencephalography (EEG) biosignals-based brain-computer interface (BCI) is established for early identification of human inattentiveness during driving activities. EEG signals are recorded from six EEG electrode positions viz Fp1, Fp2, F7, F8, O1, and O2. Spectral information of the alpha and beta frequency bands is extracted in terms of continuous wavelet transform (CWT) with a temporal correlation for complete experiments. CWT components are processed as scalograms which are color images used for visual inspection of brain states. The scalogram images of 10 s epochs are stored as the image dataset. The SqueezeNet deep convolutional neural network (CNN) is fine-tuned with transfer learning for effective drowsiness detection from CWT scalograms. Transfer-learned CNN classification model achieved the best results with 89.8% accuracy, 88.0% precision, 96.1% recall, 89.9% F1 -score, 87.7% specificity, and 79.7% Matthew’s correlation coefficient. The statistical significance of the achieved results is validated with a p-value of less than 0.05. Using wavelet information of EEG biosignals, the suggested BCI methodology offers a viable method for quicker and more accurate driving drowsiness detection. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Electroencephalography

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New health-state assessment model based on belief rule base with interpretability

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science China(Information sciences) 2021年第7期64卷 209-223页

作者： Zhijie ZHOU You CAO Guanyu HU Youmin ZHANG Shuaiwen TANG Yuan CHEN High-Tech Institute of Xi'an Department of Information and Control Engineering Xi'an University of Technology School of Computer Science and Information Security Guilin University of Electronic Technology Department of Mechanical Industrial and Aerospace Engineering Concordia University

Health-state assessment is the foundation of optimal-maintenance decision-making for complex systems to maintain reliability and safety. Generating the assessment results in a convincing and interpretable way to avoid potential risks is of great importance. Belief rule base(BRB) as an interpretable model performs well in health-state assessment. However, the interpretability of a BRB-based model may be lost during the optimization process, which is expressed mainly as three problems: expert knowledge is not effectively used in the optimization process; the optimized rules of BRB may be in conflict with real systems; and some parameters get over-optimized, which may affect experts' initial judgment. Three concepts — "searching intensity", "interpretability constraint of belief distribution", and "rule-activation factor" — are defined to address these problems. Using these concepts, we propose a new health-state assessment model based on the interpretable BRB and a new optimization method to improve the accuracy and preserve the interpretability of the new model. To demonstrate the effectiveness of the proposed model, we conducted an aero-engine case study.

关键词： health-state assessment belief rule base interpretability complex systems

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Study on ultrasonic vibration-assisted rotating beam coupled nanosecond laser grooving of SiC ceramics 19

Study on ultrasonic vibration-assisted rotating beam coupled...

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19th National Conference on Laser Technology and Optoelectronics

作者： Lin, Yingliang Chen, Xiaoxiao Rao, Qi Shen, Shunquan Zhang, Wenwu Ningbo Institute of Materials Technology and Engineering The Chinese Academy of Sciences Zhejiang Ningbo315201 China Faculty of Mechanical Engineering & Mechanics Ningbo University Zhejiang Ningbo315211 China University of Chinese Academy of Sciences Beijing100049 China Faculty of Electrical Engineering and Computer Science Ningbo University Zhejiang Ningbo315021 China

ISBN: (纸本)9781510683228

Silicon carbide ceramics possess excellent properties such as high hardness, wear resistance, high temperature resistance, and corrosion resistance, making them widely used in the aerospace industry. However, due to their high hardness and brittleness, traditional processing methods such as grinding and milling tend to generate surface debris, cracks, and tool wear during the machining of silicon carbide ceramics. Laser processing, as a non-contact processing method, possesses technological advantages. This paper carried out the laser grooving process for silicon carbide ceramics based on ultrasonic vibration assisted rotating beam with nanosecond laser. The effects of single pulse energy and ultrasonic vibration on the depth and width of the micro-groove and the three-dimensional morphology of the deposited layer were investigated. The results show that when the single pulse energy is less than 700 µJ, the depth and width of the micro-groove increase with the increase of the laser single pulse energy, and the depth and width of the micro-groove tend to stabilize when the single pulse energy reaches 700 µJ. When the ultrasonic frequency is 20 kHz, the width of the micro-groove becomes wider with the increase of the ultrasonic amplitude, and the depth of the micro-groove decreases with the increase of the ultrasonic amplitude, this is because the ultrasonic vibration direction is perpendicular to the scanning speed direction, which makes the laser beam interact with the material in a wider area, thus generating an energy dispersion effect. Comparing the conditions with and without ultrasonic assistance, it is found that the thickness of the deposited layer in the micro-groove with the use of ultrasonic vibration processing is smaller than that in the micro-groove without ultrasonic vibration processing, and the thickness of the deposited layer decreases with the increase of the ultrasonic amplitude. Line scanning of the processed area using EDS reveals that ultrasoni

关键词： aerospace industry

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Optimization Model for Energy Management in a Microgrid 2

Optimization Model for Energy Management in a Microgrid

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2nd International Conference on Applied Artificial Intelligence and Computing, ICAAIC 2023

作者： Satish, G. Dalai, Chitaranjan Dattu, Vinjamuri S. N. Ch. Rayudu, K. Sathish, T. Purohit, Kamlesh Chandra Sree Dattha Institute of Engineering and Science Department of Electrical and Electronics Engineering Telangana 501510 India Odisha University Technology and Research Department of Civil Engineering Odisha Bhubaneswar751029 India Aditya Engineering College Department Of: Mechanical Engineering Andhra Pradesh Surampalem533437 India B. V. Raju Institute of Technology Department of Electrical and Electronics Engineering Telangana Narsapur502313 India Saveetha School of Engineering Simats Department of Mechanical Engineering Tamil Nadu Chennai602105 India Graphic Era Deemed to Be University Department of Computer Science and Engineering Uttarakhand Dehradun248002 India

ISBN: (纸本)9781665456302

This article presents an optimization model for energy management (EM) in a microgrid composed of renewable energy sources. The microgrid in question, corresponding to an electric vehicle (EVs) charging station, has solar panels, wind turbines, and a bank of batteries. The loads considered are EVs that enter the charging station requesting the charging of their batteries and equipment from a small convenience store, located in the charging station itself. This work maximize the supply of active power to EVs and, simultaneously, minimize the interruptions in the energy supply. An algorithm (with the aid of computational tools) will be used to deal with the decision-making process related to turbines, panels and loads. The implementations were made in MATLAB, for modeling the energy sources, and AMPL, for applying the optimization algorithm. © 2023 IEEE.

关键词： Renewable energy resources

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Digitally-defined ultrathin transparent wireless sensor network for room-scale imperceptible ambient intelligence

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npj Flexible Electronics 2024年第1期8卷 869-878页

作者： Yunxia Jin Mengxia Yu Dat T.Nguyen Xin Yang Zhipeng Li Ze Xiong Chenhui Li Yuxin Liu Yong Lin Kong John S.Ho Institute for Health Innovation and Technology National University of SingaporeSingapore 117599Singapore Department of Biomedical Engineering National University of SingaporeSingapore 119276Singapore Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Integrative Sciences and Engineering Programme National University of Singapore Graduate SchoolSingapore 119077Singapore The N.1 Institute for Health National University of SingaporeSingapore 117456Singapore Institute of Materials Research and Engineering Agency for Science Technology and ResearchSingapore 138634Singapore Department of Mechanical Engineering University of UtahSalt Lake CityUT 84112USA

Wireless and battery-free radio-frequency(RF)sensors can be used to create physical spaces that ambiently sense and respond to human *** such sensors ultra-flexible and transparent is important to preserve the aesthetics of living environments,accommodate daily activities,and functionally integrate with ***,existing RF sensors are unable to simultaneously achieve high transparency,flexibility,and the electrical conductivity required for remote room-scale ***,we report 4.5μm RF tag sensors achieving transparency exceeding 90%that provide capabilities in room-scale ambient wireless *** develop a laser-assisted water-based adhesion-reversion process to digitally realize computer-aided RF design at *** individually tagging multiple objects and regions of the human body,we demonstrate multiplexed wireless tracking of humanenvironment interactions and physiological signals at a range of up to *** radio-frequency identification sensors open opportunities for non-intrusive wireless sensing of daily living spaces for applications in health monitoring and elderly care.

关键词： network ambient transparent

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Design and Evaluation of IoT Prototypes: Leveraging Test-Beds for Performance Assessment and Innovation

Design and Evaluation of IoT Prototypes: Leveraging Test-Bed...

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2025 IEEE International Conference on Computational, Communication and Information Technology, ICCCIT 2025

作者： Kotiyal, Arnav Shrivastava, Anurag Nagpal, Amandeep Manjunatha Dixit, Krishna Kant Reddy, R. Akhilesh Graphic Era Deemed to Be University Department of Computer Science & Engineering Dehradun India Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Tamilnadu Chennai India Lovely Professional University Phagwara India New Horizon College of Engineering Department of Mechanical Engineering Bangalore India GLA University Department of Electrical Engineering Mathura India MLR Institute of Technology Department of CSE-AI&ML Telangana Hyderabad India

ISBN: (纸本)9798331512965

When you mention the Internet of things (IoT), connected devices and systems can be made seamless. Whilst creating and prototyping IoTs are oftentimes necessary, design, testing and evaluating IoT prototypes require robust frameworks and methodologies to achieve reliable performance and innovation. In this paper, test beds as controlled environments for performance assessment of IoT prototypes are discussed and these tested in terms of design and evaluation. Of importance are test-beds as they aid in simulating real world conditions to do iterative improvements, and foster innovation in IoT solutions. It presents some key methodologies for developing IoT prototypes, underlines the role of test beds in the validation process, and reports about evaluation of some case studies demonstrating the impact of such frameworks on alleviating inefficiency, unreliability, and non-scalability. The paper combines leading edge technologies with strong data driven decision making to present actionable feedback on exploiting test beds to catalyse IoT innovation against pivotal challenges including interoperability, security, and scalability. © 2025 IEEE.

关键词： Testbeds

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