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The Pairing Analysis Improvement of Magnetized Structure in Electromagnetic Bulging Process in Case of Tube with Field Shaper

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Journal of Electromagnetic Analysis and Applications 2024年第4期16卷 43-67页

作者： Blaise Kevine Lenz Soronga Zhanqian Zhan Jing Liu Jonas Asamoah Mohamed Bangali Bangura Matala Makiese N’kodia Kambani Chrionie Md Jobayer Hossain Yongdong Chen Program Debugging and Design Department Guangdong Lyric Robot Automation Co. Ltd Huizhou China Electrical and Automation Department China Three Gorges University Yichang China Electronic Department Power Electronic Research Center University of Kent Giles Ln Canterbury UK Program Debugging Department Guangdong Lyric Robot Automation Co. Ltd. Huizhou China Electrical and Computer Engineering Department South China University of Technology Guangzhou China World Standardization Certification and Testing Group (Shenzhen) Co. Ltd. Shenzhen China Electrical Engineering-Power System Mapon University Kindu Democratic Republic of Congo Department of Economy Managment School of Management Computer and Telecomunication Rabbat Marocco Materials Visual Calibration Department Guangdong Lyric Robot Automation Co. Ltd. Huizhou China Program Design Department Guangdong Lyric Robot Automation Co. Ltd. Huizhou China

In the current practical science, the accuracy in the formability of metal alloys being the goal when using electromagnetic forming (EMF) technology, which is a high-speed processing technology that uses Lorentz forces to achieve plastic deformation of sheet metal;according to the previous analysis, the results have shown that in most cases, the Lorentz force acting on the workpiece (metal) is not uniform, there are uneven axial deformations of the metal plates which prevent the rapid advancement of today’s technology. In this article, we presented some advanced analyzes which will lead us to improve the technical solution for the problems of non-uniform axial deformations of the metals in the traditional tube electromagnetic forming technology (EMF). A field shaper is used as a practical forming tool to influence the magnetic field and magnetic pressure distribution, thereby improving the forming ability and result during the electromagnetic forming (EMF) process and we see that induced eddy current control is realized by changing the structural parameters of the magnetic field shaper;which improves the strength and controllability of the magnetic force that acts on the workpiece;thereby a greater radial magnetic pressure can be achieved with field shaper than the case without it;the field shaper regulates the electromagnetic force, the distribution of the magnetic pressure decreases, and the uniform force area of the tube increases which effectively enhances the uniform range of the pipe electromagnetic bulging and the electromagnetic induction coupling between the coil and the metallic workpiece is generally required to produce the Lorentz forces. Using COMSOL Multiphysics® simulation software helped us to accurately represent the real world, simulating multiple physical effects that happened in this model during the process.

关键词： Electromagnetic Forming Field Shaper Lorentz Force Magnetic Pressure Distribution

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Shape-Tunable BaTiO3 Crystals Presenting Facet-Dependent Optical and Piezoelectric Properties

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Small 2023年第9期19卷 2205920-2205920页

作者： Chen, Jing-Wei Pal, Arnab Chen, Bo-Hao Kumar, Gautam Chatterjee, Subhodeep Peringeth, Kiran Lin, Zong-Hong Huang, Michael H. Department of Chemistry National Tsing Hua University Hsinchu300044 Taiwan Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu300044 Taiwan International Intercollegiate PhD Program National Tsing Hua University Hsinchu300044 Taiwan National Synchrotron Radiation Research Center Hsinchu300092 Taiwan Department of Power Mechanical Engineering National Tsing Hua University Hsinchu300044 Taiwan Institute of Biomedical Engineering National Tsing Hua University Hsinchu300044 Taiwan

BaTiO3 octahedra, edge-, and corner-truncated cubes, and cubes with four tunable sizes from 132 to 438 nm are synthesized by a solvothermal growth approach. Acetic acid treatment can cleanly remove BaCO3 impurity. Rietveld refinement of X-ray diffraction patterns and Raman spectra help to confirm the particles have a tetragonal crystal structure. The crystals also exhibit size- and facet-dependent bandgap shifts. BaTiO3 octahedra show larger piezoelectric, ferroelectric, and pyroelectric effects than truncated cubes and cubes. The measured dielectric constant differences should be associated with their various facet-dependent behaviors. Piezoelectric nanogenerators fabricated from BaTiO3 octahedra consistently show the best performance than those containing truncated cubes and cubes. In particular, a nanogenerator with 30 wt.%-incorporated octahedra displays an open-circuit voltage of 23 V and short-circuit current of 324 nA. The device performance is also highly stable. The maximum output power reaches 3.9 µW at 60 MΩ. The fabricated nanogenerator can provide sufficient electricity to power light-emitting diodes. This work further demonstrates that various physical properties of semiconductor crystals show surface dependence. © 2022 Wiley-VCH GmbH.

关键词： Piezoelectricity

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Sn-Mediated Local Atomic Ordering Enhances Reversible Anionic Redox Activity in Cation-Disordered Li1.3Mn0.4Nb0.3O2 Cathodes

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Advanced Energy Materials 2025年第0期

作者： Sun, Gang Nie, Dan Zhu, Qingjun Gao, Lijun Chang, Yi-Hung Liu, Han Yang, Jiayi Ren, Yang Shao, Yu-Cheng Ishii, Hirofumi Sui, Xulei Wang, PanPan Wang, Hsiao-Tsu Wang, Zhenbo Shenzhen Key Laboratory of Special Functional Materials Shenzhen Engineering Laboratory for Advance Technology of Ceramics Guangdong Research Center for Interfacial Engineering of Functional Materials Guangdong Provincial Key Laboratory of New Energy Materials Service Safety College of Materials Science and Engineering Shenzhen University Shenzhen518071 China Bachelor's Program in Advanced Materials Science Tamkang University No.151 Yingzhuan Rd. Tamsui Dist. New Taipei25137 Taiwan Department of Physics City University of Hong Kong 999077 Hong Kong National Synchrotron Radiation Research Center 101 Hsin-Ann Road Hsinchu Science Park Hsinchu300092 Taiwan State Key Laboratory of Space Power-Sources MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage MOE Engineering Research Center for Electrochemical Energy Storage and Carbon Neutrality in Cold Regions School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150001 China

Recent advances in lithium-ion batteries have revealed the potential of Li-excess cation-disordered rock salt (DRX) cathodes, which expand the design space for cathode materials. The evidence of facile lattice substitution further provides a key strategy for activating redox reaction centers and enhancing the cycling performance of such materials. Here, the study explores how Sn-mediated local atomic ordering enhances reversible anionic redox activity in Li1.3Mn0.4Nb0.3O2 through the use of aberration-corrected scanning transmission electron microscopy, ex/in situ X-ray techniques, and theoretical calculation. The results demonstrate that Sn incorporation optimizes the local atomic structure, fostering the formation of rapid Li+ diffusion "elevator" pathways and short-range ordered structures, thereby enhancing the Li+ transport network. Additionally, quantitative analysis of the redox pathways and degree of participation for Mn and O during charge–discharge cycles reveals that the Sn-mediated electrode exhibits enhanced anionic O redox activity at high charging voltages, maintaining elevated activity throughout subsequent cycling. This sustained performance not only indicates increased redox capabilities but also suggests improved structural stability. By elucidating the complex interplay between composition, local structure, and performance, this study advances the understanding of DRX materials and underscores the potential of strategic elemental substitution for optimizing disordered cathode materials in next-generation energy storage systems. © 2025 Wiley-VCH GmbH.

关键词： Redox reactions

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Improving dynamic collision frequencies: impacts on dynamic structure factors and stopping powers in warm dense matter

arXiv

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arXiv 2023年

作者： Hentschel, Thomas W. Kononov, Alina Olmstead, Alexandra Cangi, Attila Baczewski, Andrew D. Hansen, Stephanie B. School of Applied & Engineering Physics Cornell University IthacaNY United States Center for Computing Research Sandia National Laboratories AlbuquerqueNM United States Nanoscience and Microsystems Engineering Program University of New Mexico AlbuquerqueNM United States Center for Advanced Systems Understanding Helmholtz-Zentrum Dresden-Rossendorf Görlitz Germany Department of Physics and Astronomy University of New Mexico AlbuquerqueNM United States Pulsed Power Sciences Center Sandia National Laboratories AlbuquerqueNM United States

Simulations and diagnostics of high-energy-density plasmas and warm dense matter rely on models of material response properties, both static and dynamic (frequency-dependent). Here, we systematically investigate variations in dynamic electron-ion collision frequencies ν(ω) in warm dense matter using data from a self-consistent-field average-atom model. We show that including the full quantum density of states, strong collisions, and inelastic collisions lead to significant changes in ν(ω). These changes result in red shifts and broadening of the plasmon peak in the dynamic structure factor, an effect observable in x-ray Thomson scattering spectra, and modify stopping powers around the Bragg peak. These changes improve the agreement of computationally efficient average-atom models with first-principles time-dependent density functional theory in warm dense aluminum, carbon, and deuterium. © 2023, CC BY.

关键词： Quantum theory

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Developing a Floating Robot for Mechanical Control of Water Hyacinth

Developing a Floating Robot for Mechanical Control of Water ...

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Mobile, Intelligent, and Ubiquitous Computing Conference (MIUCC), International

作者： Mostafa E.A. Elsayed Ahmed K.A. Mohamed Mahmoud Shaaban Mohamed A. Abdelrahman Mohamed E. A. E. Ahmed Mostafa R. Rashed Mechanical Engineering Department Automation and Energy Technology Lab. Shoubra Faculty of Engineering Benha University Cairo Egypt Department of Agricultural Engineering Agricultural Power and Machinery Faculty of Agriculture Benha University Kalubia Egypt Smart Engineering Systems Center. Mechanical Engineering Program. School of Engineering and Applied Sciences Nile University Giza Egypt Mechanical Engineering Department Combustion and Energy Technology Lab. shoubra Faculty of Engineering Benha University Cairo Egypt Mechanical Engineering Department Shoubra Faculty of Engineering Benha University Cairo Egypt Mechanical Engineering Department Faculty of Engineering Modern University for Technology and Information Cairo Egypt

Water hyacinth has become widespread in freshwater bodies in several countries, leading to various issues, particularly its substantial water consumption and the resulting need to control its growth. Among the different methods of controlling water hyacinth, mechanical control stands out as the most effective and environmentally friendly approach. A proposed harvester robot has been developed, capable of efficiently cutting and collecting water hyacinth from the water's surface. The robot boasts several advantages, including its ability to operate in narrow water paths and lakes, use clean energy sources to preserve the water ecology, employ a GPS module for safety and error detection, and generate maps for evaluating work and predicting annual growth. When compared to other technologies dealing with water hyacinth, this innovative water hyacinth harvesting robot presents a significantly lower cost of 0.01 $/kg, making it an optimal solution for addressing water hyacinth problems.

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Ultrasound-guided drug delivery system utilizing piezocatalytic MoS2 nanomaterials for anti-inflammatory therapy

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Nano Energy 2024年 127卷

作者： Lin, Ssu-Chi Joshi, Ravindra Ganguly, Anindita Barman, Snigdha Roy Pal, Arnab Kaswan, Kuldeep Liu, Kuei-Lin Nain, Amit Kao, Fu-Cheng Lin, Zong-Hong Department of Biomedical Engineering National Taiwan University Taipei10167 Taiwan Institute of Biomedical Engineering National Tsing Hua University Hsinchu30013 Taiwan Department of Power Mechanical Engineering National Tsing Hua University Hsinchu30013 Taiwan Internet of Senses Research Center National Tsing Hua University Hsinchu30013 Taiwan International Intercollegiate Ph.D. Program National Tsing Hua University Hsinchu30013 Taiwan Department of Materials Engineering Indian Institute of Science Karnataka Bangalore560012 India Department of Orthopaedic Surgery Chang Gung Memorial Hospital Taoyuan33305 Taiwan College of Medicine Chang Gung University Taoyuan33302 Taiwan

Traditional drug delivery systems lack the potential of controlled drug release, thereby decreasing drug utilization and release efficiency. Herein, a next generation of stimuli-responsive drug delivery platform is designed based on piezocatalytic molybdenum disulfide nanoflowers (MoS2 NFs) which can be triggered by ultrasound (US) stimulation for effective acute inflammation therapy. Under US irradiation, MoS2 NFs undergoes piezocatalysis to generate reactive oxygen species (ROS) owing to piezoelectric polarization, thus releasing loaded anti-inflammatory drug Indomethacin (IND) to the targeted inflammation site. The cumulative release of IND elevated significantly with the increase in the duration for US exposure due to the amplified ROS generation, which displayed a highly controllable nature of the as-designed drug delivery platform. For convenient applications, the IND loaded MoS2 NFs (IND@MoS2 NFs) was functionalized onto commercial dressings and their tunable in-vivo drug release performance was demonstrated in paw edema model. IND@MoS2 NFs upon US irradiation, controllably released IND into the site-specific inflamed paw which significantly inhibited 56 % of paw swelling in 6 h by suppressing the infiltration of neutrophils and expression of pro-inflammatory cytokines such as tumor necrosis factor-α (TNF-α). The highly controllable drug delivery system holds great potential in facilitating personalized, user-friendly theranostic applications with improved patient outcomes. © 2024 Elsevier Ltd

关键词： Ultrasonics

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Piezoelectric and triboelectric nanogenerators: Promising technologies for self-powered implantable biomedical devices

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Nano Energy 2024年 119卷

作者： Khan, Arshad Joshi, Ravindra Sharma, Manish Kumar Ganguly, Anindita Parashar, Parag Wang, Ting-Wei Lee, Sangmin Kao, Fu-Cheng Lin, Zong-Hong Department of Biomedical Engineering National Taiwan University Taipei10167 Taiwan International Intercollegiate PhD Program National Tsing Hua University Hsinchu30013 Taiwan Department of Power Mechanical Engineering National Tsing Hua University Hsinchu30013 Taiwan Department of Materials Science and Engineering National Tsing Hua University Hsinchu30013 Taiwan Internet of Senses Research Center National Tsing Hua University Hsinchu30013 Taiwan Department of Biomedical Engineering and Environmental Sciences National Tsing Hua University Hsinchu30013 Taiwan School of Mechanical Engineering Chung-Ang University Seoul06974 Korea Republic of Department of Orthopaedic Surgery Chang Gung Memorial Hospital Taoyuan33305 Taiwan College of Medicine Chang Gung University Taoyuan33302 Taiwan Department of Chemical Engineering National Taiwan University Taipei10167 Taiwan

Implantable biomedical devices (IBDs) have garnered wide-scale attention in recent years due to their enormous contribution to the biomedical sector. However, an uninterrupted and reliable power source has consistently been the primary barrier for IBDs, which is greatly alleviated by batteries. The widespread application of battery-powered IBDs is hindered by several limitations, including bulkiness, limited capacity and shelf-life, and expenditure associated with surgery-based battery recharge/replacement. To address these challenges, state-of-the-art self-powering technologies have emerged, including implantable piezoelectric nanogenerators (iPENGs) and implantable triboelectric nanogenerators (iTENGs). These technologies enable IBDs to operate autonomously by harnessing the minute mechanical movements of internal organs, such as heartbeat, respiration, blood circulation, muscle contraction/relaxation, and lung vibration. This review focuses on the recent advancements in iTENGs and iPENGs for the development of self-powered IBDs with a wide range of applications, including energy harvesting from biomechanical and ultrasound sources and energy storage using batteries and capacitors. This study also explores the extensive sensing applications of IBDs in various areas including cardiac, gastrointestinal, bladder, and ligament-strain monitoring. Finally, therapeutic applications of IBDs, such as nerve stimulation, bone stimulation, cartilage therapy, tissue regeneration, muscle stimulation, drug delivery, and diabetes management are discussed. © 2023 Elsevier Ltd

关键词： Nanogenerators

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Snake-scale stimulated robust biomimetic composite triboelectric layer for energy harvesting and smart health monitoring

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Nano Energy 2024年 122卷

作者： Huang, Ming-Zheng Parashar, Parag Chen, An-Rong Shi, Shih-Chen Tseng, Yao-Hsuan Lim, Kee Chin Yeh, Hsuan-Yu Pal, Arnab Kang, Dun-Yen Lin, Zong-Hong Institute of Biomedical Engineering National Tsing Hua University Hsinchu 30013 Taiwan Department of Biomedical Engineering National Taiwan University Taipei 10617 Taiwan Department of Chemical Engineering National Taiwan University Taipei 10617 Taiwan Department of Materials Science and Engineering National Tsing Hua University Hsinchu 30013 Taiwan Department of Mechanical Engineering National Cheng Kung University Tainan 70101 Taiwan International Intercollegiate Ph.D. Program National Tsing Hua University Hsinchu 30013 Taiwan Department of Power Mechanical Engineering National Tsing Hua University Hsinchu 30013 Taiwan Internet of Senses Research Center National Tsing Hua University Hsinchu 30013 Taiwan

Extreme frictional wear of triboelectric layers severely hinders long-term sustainability of triboelectric nanogenerators (TENGs) for efficient ambient energy harvesting. The state-of-the-art solutions necessitate sophisticated structural designs and complex packaging constraints, impeding the feasibility of TENGs for practical applications. Herein, inspired by the structures and compositions of snake scales, a biomimetic composite (BC) film is fabricated as a wear-resistant triboelectric contact layer. The successful formation of disulfide bond-facilitated cross-linkage of cysteine proteins in the keratin-based BC film promotes excellent mechanical resilience and durability, thereby solving the material abrasion challenges associated with solid-solid triboelectric layers. The BC film, with toothed microstructure, exhibits improved charge transfer, low friction, and consistent long-term stable outputs compared to commercial films. Furthermore, a self-powered BC film-based TENG is integrated into a bicycle for biomechanical energy harvesting, lightening warning signals for safer night ride with stable 300 V electrical output for at least 6 h. Moreover, a smart health monitoring system is further proposed by embedding TENG-based sensors into the bicycle saddle, accurately capturing the rider's pelvic-saddle interactions on varying terrain slopes. By leveraging the unique biomechanical information, machine learning-assisted user identification and terrain slope data classifications are achieved with high accuracies, laying a foundation for futuristic smart healthcare applications. This work provides a strategy to reduce material abrasion by exploiting the unique characteristics of a biomimetic material, facilitating a basis for efficient environmental energy harvesting and smart sensing. © 2024 Elsevier Ltd

关键词： Biomechanical energy harvesting Biomimetic Smart healthcare Snake-scales Triboelectric nanogenerator Wear resistance

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A Parametric of Basin Geometry of Gravitational Water Vortex power Plant

A Parametric of Basin Geometry of Gravitational Water Vortex...

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

作者： Huwae, Reza Susatyo, Anjar Subekti, Ridwan Arief Sudibyo, Henny Khaerudini, Deni Shidqi Mercu Buana University Program of Study Nagister in Mechanical Engineering Jakarta Indonesia Research Centre for Electrical Power and Mechatronics Bandung Indonesia Research Center for Physics Serpong Indonesia Department of Physics FMIPA Universitas Indonesia Depok Indonesia

ISBN: (纸本)9781728188492

Energy demand is increasing and it raise a climate change issue. Greenhouse emissions, depleted fossil energy resources, increasing fossil energy cost are reasons to maximize the utilization of renewable energy source. Hydropower extend an alternative energy source to cover the growing energy demand and release no emission at the same time for maintaining the climate change. In recent years, major focus of hydropower research is moving to small hydropower, as large hydropower opportunities are exploited and have high capital expenditure to build. A water vortex stream is a common phenomenon that we can see everyday life. Water flow out from the bathtub through outlet or water flow down in the sink after we finish washing the dishes, that is what we call vortex flow. and is a free-surface flow, homogenous fluid that contained water and air. This water vortex can be applied in low head small hydropower plant, recently known as gravitational water vortex power plant. River off Gravitational Water Vortex power plant (GWVPP) is one of low head turbine that can be used to generate electricity in small scale, pico-hydro. This study is focus on basin geometry. Models are developed to investigate the outlet diameter, depth discharge and basin geometry. It is found out that parameter of the basin should refer to source, which are flow rate, and the head of the water. It shows that spiral geometry for the basin gives symmetric and strong vortex and can be used as an alternative of conical basin. © 2020 IEEE.

关键词： Geometry

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Gravitational Water Vortex Hydropower: Experimental Investigation of Free Surface Wave in Water Intake Channel

Gravitational Water Vortex Hydropower: Experimental Investig...

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

作者： Huwae, Reza Susatyo, Anjar Subekit, Ridwan Arief Sudibyo, Henny Khaerudini, Deni Shidqi Mercu Buana University Program of Study Nagister in Mechanical Engineering Jakarta Indonesia Research Centre for Electrical Power and Mechatronics Bandung Indonesia Research Center for Physics Serpong Indonesia Department of Physics FMIPA Universitas Indonesia Depok Indonesia

ISBN: (纸本)9781728188492

Development program for construction of irrigation channel gives big opportunity for development of renewable energy from small low head hydropower source. The use of hydropower gives no negative impact to environment, especially for greenhouse emission. A gravitational vortex hydropower is the object of this study, with the focus on the water intake channel using rectangular geometry. An experimental study was conducted to find the influencing parameters on the intake section of the gravitational vortex hydropower. A set of parameters were varied to determine which parameters affecting the water surface at the intake channel. By analyzing the results of the experiments, the influence of parameters on the water intake channel of gravitational vortex hydropower was found. A performance curve for differentiation of flow type and identification of surface contour has been made. Based on the results of the experiment, placing a strainer at 5 cm distance gave 60% higher output power since this setting could reduce the wave speed. Recommendation to have further study in non-dimensional parametric should be considered for increasing efficiency of the gravitational vortex hydropower. © 2020 IEEE.

关键词： Vortex flow

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