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13th IEEE Global Conference on Consumer Electronic, GCCE 2024

作者： Mizumaki, Mayu Takahashi, Yoshinori Mashidori, Hideto Tokyo Metropolitan College of Industrial Technology Mechanical Engineering Program Advanced Course Tokyo Japan Kogakuin University Department of Information Design Tokyo Japan Tokyo Metropolitan College of Industrial Technology Aerospace Engineering Course Tokyo Japan

ISBN: (纸本)9798350355079

Preliminary wind noise experiments on a wind turbine with a wide range of helix angle condition blades, including excessive angles, were conducted to investigate helix angle conditions that reduce wind shear noise. The wind turbine used in the experiment had three helical blades, with helix angles varying from 0° to 150°. Blades with a helix angle of 0° are straight blades. When the three blades are evenly distributed on the circumference, the blades are 120° apart. Therefore, a blade with helical angles greater than 120° and 150° has an angular position that overlaps that of the neighboring blade. Preliminary experiments were conducted to measure and evaluate the wind shear noise of vertical-axis wind turbines possessing a wide range of helical angle condition blades, including such excessive helical angles. In preliminary experiments, the wind noise generated when a windmill was rotated at a constant speed using a motor in a windless anechoic chamber was measured. The experimental results showed that wind noise was reduced the most when the twist angle was 150°, despite the excessive twist angle condition. © 2024 IEEE.

关键词： Anechoic chambers

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Application of Chaotic Encryption and Decryption in Wireless Transmission From Sensory Toolholders on Machine Tools

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IEEE Sensors Journal 2023年第11期23卷 11453-11468页

作者： Lin, Chi-Yuan Wu, Shu-Cing Kuo, Ping-Huan Huang, Meng-Jun Hong, Song-Wei Yau, Her-Terng National Chin-Yi University of Technology Department of Electronic Engineering Taichung411030 Taiwan National Chin-Yi University of Technology Prospective Technology of Electrical Engineering and Computer Science Program Taichung411030 Taiwan Chiayi62102 Taiwan National Chung Cheng University Department of Mechanical Engineering Chiayi62102 Taiwan

In recent years, several industries have increased their demand for processing precision, automatic detection, and visualization interfaces. Therefore, to keep pace with the fourth industrial revolution, machine tool operators install a large number of sensors on machine tools to obtain more precise physical quantities during processing and use a variety of sensors to obtain measurements in various situations. However, these additional sensors on machine tools result in complicated wire layouts, which exhibit negative effects on processing. Such problems lead to the birth of wireless data transmission, which is expected to become the new standard in the future. At present, there is more and more interactive integration between relevant embedded system and the machine tool, which allows information communication between each other in the wireless domain. However, generally, the majority of machine tool operators focus on optimizing the sensing conditions during processing, but they disregard the importance of information security. In the current era of the Internet of Things (IoT), information security is regarded as a crucial factor. For the wireless communication between the IoT equipment for each machine in the machining field, the transmitted data are almost exposed within public space directly due to the loss in constraint and protection of physical wiring. Therefore, such a process can easily be intercepted by other devices that capture information on relevant status of the machine or command messages received by the controller, where intentional individual may possibly control the operating mechanism and progress of entire plant. This leads to theft of relevant secrets in manufacturing technology for the subject company, or intentional shutdown, machine damage, and vicious blackmailing attacks. Therefore, introducing the mechanism of safety protection during wireless signal transmission is an inevitable technology to maintain the company interests and also the

关键词： Synchronization

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Inhibiting scar formation via wearable multilayer stacked electret patch:Self-creation of persistent and customizable DC electric field for fibrogenic activity restriction

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InfoMat 2024年第3期6卷 66-80页

作者： Sung-Won Kim Sumin Cho Donghan Lee Jiyu Hyun Sunmin Jang Inwoo Seo Hyun Su Park Hee Jae Hwang Hyung-Seop Han Dae Hyeok Yang Heung Jae Chun Suk Ho Bhang Dongwhi Choi School of Chemical Engineering Sungkyunkwan UniversitySuwonRepublic of Korea Department of Mechanical Engineering(Integrated Engineering Program) Kyung Hee UniversityYonginGyeonggiRepublic of Korea Biomaterials Research Center Biomedical Research DivisionKorea Institute of Science and Technology(KIST)SeoulRepublic of Korea Department of Medical Life Sciences College of MedicineInstitute of Cell and Tissue EngineeringThe Catholic University of KoreaSeoulRepublic of Korea

Electrical stimulation has recently received attention as noninvasive treatment in skin wound healing with its outstanding biological property for clinical ***,the complexity of equipment for applying appropriate electrical stimulation remains an ongoing ***,we proposed a strategy for skin scar inhibition by providing electrical stimulation via a multilayer stacked electret(MS-electret),which can generate direct current(DC)electric field(EF)without any power supply *** addition,the MS-electret can easily control the intensity of EFs by simply stacking electret layers and maintain stable EF with the surface potential of 3400 V over 5 days owing to the injected charges on the electret *** confirmed inhibition of type 1 collagen andα-SMA expression of human dermal fibroblasts(hDFs)by 90%and 44%in vitro,indicating that the transition of hDFs to myofibroblasts was restricted by applying stable electrical *** further revealed a 20%significant decrease in the ratio of myofibroblasts caused by the MS-electret in *** findings present that the MS-electret is an outstanding candidate for effective skin scar inhibition with a battery-free,physiological electrical microenvironment,and noninvasive treatment that allows it to prevent external infection.

关键词： DC electric field dermal fibroblasts electret scar formation restriction self-creation of electrical stimulation

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Influence of ZnO Nanoparticle Dispersed Baheda Oil Biodiesel Blend in Variable Compression Ratio Diesel Engine: Vibration and Noise Assessment

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Journal of The Institution of Engineers (India): Series C 2021年第4期102卷 941-949页

作者： Sanatha, Kaki Bhatti, Sukhvinder Kaur Jaikumar, Sagari Engineering and Technology Program Rushikonda Visakhapatnam India Department of Mechanical Engineering Andhra University Visakhapatnam India Department of Mechanical Engineering GITAM Institute of Technology Visakhapatnam India

The present study is intended for the vibration and noise analysis of variable compression ratio diesel engine operating with zinc oxide (ZnO) nanoparticle dispersed with Baheda oil biodiesel blend (BOME20). The ZnO nanoparticles were taken at the following proportions of 50 ppm, 75 ppm, and 100 ppm. Further, the QPAN dispersant was added to nanoparticles at 1:1 ratio. The compression ratio was altered from 16.5 to 19.5 by keeping the speed constant at 1500 rpm. The vibration (velocity) and noise characteristics were stated in terms of RMS values. The RMS velocity together with RMS noise was seen lower for B20 than diesel fuel. Further, the dispersion of nanoparticles has depicted a significant reduction in vibration and noise. The least RMS velocity and RMS noise was attained with BOME20 + 75 ppm ZnO + 75 ppm DSP compared to other fuels. But the compression ratio enhancement has shown a gradual increase in vibration and noise. At a compression ratio of 16.5, the lower intensity of vibration and noise of BOME20 + 75 ppm ZnO + 75 ppm DSP were 0.0792 m/sec and 55.2 dB, respectively. © 2021, The Institution of Engineers (India).

关键词： Biodiesel

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A Systematic Evaluation of Clustering Algorithms Against Expert-Derived Clustering

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Operations Research Forum 2025年第2期6卷 1-24页

作者： Mikrou, Ioannis Sapidis, Nickolas S. Department of Mechanical Engineering University of Western Macedonia ZEP Kozani 50100 Greece Postgraduate Masters Program “Quality Management and Technology” Hellenic Open University Par. Aristotelous 18 Patras 26335 Greece

Clustering algorithms have long sought to replicate human expertise in data clustering. This research utilizes six mechatronic products and a team of domain experts to assess how closely the results of six clustering algorithms align with expert-generated outcomes. This comparison of clustering results includes validation indices, the analysis of component migrations between the generated clusters, and optical inspection. The mechatronic products were selected for their complex nature, which provides a challenging context for the clustering analysis. The algorithms used in this research are Ward’s method (WARD), partitioning around medoids (PAM), K-means (K-MEANS), divisive analysis (DIANA), density-based spatial clustering of applications with noise (DBSCAN), and clustering by fast search and find of density peaks (DPC), and the validation indices employed to evaluate the clustering results are the silhouette coefficient (SC) and the composed density between and within clusters (CDbw). © The Author(s) 2025.

关键词： Clustering performance DSM models Human expert benchmarks Machine learning Mechatronics

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Exploring Irradiation as a Means to Toughen and Improve the Impact Resistance of Dolomite Filled PP/r-PET Composites

Exploring Irradiation as a Means to Toughen and Improve the ...

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Green Materials and Electronic Packaging Interconnect technology Symposium, EPITS 2024

作者： Ibrahim, Ismail Ramalingam, Aiswaria Mohammad Shirajuddin, Siti Salwa Abdul Razak, Mohd Fairul Sharin Zainol, Mohd Hafiz Kaew-On, Jatuporn Faculty of Chemical Engineering & Technology University Malaysia Perlis Perlis Kangar01000 Malaysia Agency Nucklear Malaysia Selangor Kajang43000 Malaysia Mechanical Engineering Program Faculty of Engineering Thaksin University of Thailand Khao Rup Chang Thailand

ISBN: (纸本)9789819628704

This study investigates the effects of irradiation on the mechanical properties of dolomite-filled polypropylene (PP)/recycled polyethylene terephthalate (r-PET) composites across varying filler ratios. Composites with PP/r-PET ratios of 100/0, 90/10, 80/20, 70/30, and 60/40, each containing 3% dolomite, were subjected to irradiation doses of 0, 30, and 90 kGy. Tensile and impact tests, along with scanning electron microscopy (SEM) for surface morphology analysis, were employed to investigate performance changes post-irradiation. It is expected that the composite with a 90/10 PP/r-PET ratio at a 30 kGy dose will demonstrate the highest tensile and impact strengths, while increased irradiation doses are predicted to reduce mechanical properties across other ratios. For raw PP, elongation at break is anticipated to reach its peak post-irradiation, with the 90 kGy dose likely yielding the highest Young’s modulus. Morphologically, non-irradiated samples are expected to exhibit fewer microcracks and retain greater structural integrity. Overall, the study aims to elucidate how irradiation influences the enhancement or reduction of mechanical properties in these composites, dependent on composition and irradiation dose. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Polyethylenes

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Development of an embedded system for monitoring a solar power plant in the Amazon region 15

Development of an embedded system for monitoring a solar pow...

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15th IEEE International Conference on Industry Applications, INDUSCON 2023

作者： Lisboa, Yasmim Santos, Lucas Lobato, Ellen Fonseca, Wellington Silva, Kaylane Rodrigues, Iris de Oliveira e Silva, Marcelo Institute of Technology Federal University of Pará Pará Brazil Mechanical Engineering Graduate Program Federal University of Pará Belém Brazil

ISBN: (纸本)9798350314182

The present work deals with the development of an embedded Internet of Things (IoT) system for monitoring the temperature of a photovoltaic system at different points, to enable the analysis of the efficiency of the solar system based on the thermal effect, considering the characteristics climate in the Amazon region. The module created was built and installed in a photovoltaic solar plant located at the Federal University of Pará. For the analyses, the regions of interest for monitoring the panels were considered, which are: the surface of the generator module in contact with the sun;the shaded area of the panel and the ambient temperature. Satisfactory results were obtained regarding the operation of the embedded system, which proved to be ideal for monitoring solar panels due to the ease of updating, communication, and data visualization. ©2023 IEEE.

关键词： ESP32 Industry 4.0 Internet of Things MQTT Photovoltaic

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Fluid Flow and Mixed Heat Transfer in a Horizontal Channel with an Open Cavity and Wavy Wall

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Intelligent Automation & Soft Computing 2023年第7期37卷 147-163页

作者： Tohid Adibi Shams Forruque Ahmed Omid Adibi Hassan Athari Irfan Anjum Badruddin Syed Javed Department of Mechanical Engineering University of BonabBonabIran Science and Math Program Asian University for WomenChattogramBangladesh Energy Management Group Energy and Environment Research CenterNiroo Research InstituteTehranIran Department of Mechanical Engineering Elm-o-Fann University College of Science and TechnologyUrmiaIran Mechanical Engineering Department College of EngineeringKing Khalid UniversityAbha61421Saudi Arabia

Heat exchangers are utilized extensively in different industries and ***,optimizing heat exchangers has been a major concern among *** various studies have been conducted to improve the heat transfer rate,the use of a wavy wall in the presence of different types of heat transfer mechanisms has not been *** study thus investigates the mixed heat transmission behavior of fluid in a horizontal channel with a cavity and a hot,wavy *** fluid flow in the channel is considered laminar,and the governing equations including continuity,momentum,and energy are all solved *** numerical solution is stabilized by using a first-order multi-dimensional characteristic-based scheme in combination with a fifth-order Runge-Kutta *** flow and heat transfer effects of varying Richardson numbers,Reynolds numbers,wave amplitude,wavelength,channel height,and cavity width are *** results indicate that the mean Nusselt number increases with an increase in Reynolds number,wave amplitude,and cavity width,while it decreases with an increase in Richardson number,wavelength,and channel *** minimum Nusselt number is calculated to be 0.7,whereas the maximum Nusselt number is *** Nusselt number has only increased by 40%in the higher depths of the cavity,despite the Richardson number being 10,000 times *** this figure increases to 130%at lower *** mean Nusselt number is thus significantly influenced by channel height and cavity *** influence of wave amplitude on the mean Nusselt number is twice that of wavelength.

关键词： Mixed heat transfer wavy wall horizontal channel open cavity numerical simulation

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Developing a Floating Robot for mechanical Control of Water Hyacinth 3

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

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3rd International Mobile, Intelligent, and Ubiquitous Computing Conference, MIUCC 2023

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

ISBN: (纸本)9798350306231

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. © 2023 IEEE.

关键词： Weed control

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An expandable chamber for safe brain retraction: new technologies in the field of transcranial endoscopic surgery

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2023年第4期24卷 326-335页

作者： Elena ROCA Anna GOBETTI Giovanna CORNACCHIA Oscar VIVALDI Barbara BUFFOLI Giorgio RAMORINO Head and Neck Department NeurosurgeryIstituto Ospedaliero Fondazione Poliambulanza25124 BresciaItaly Technology for Health PhD Program University of Brescia25124 BresciaItaly Materials Science and Technology at Department of Mechanical and Industrial Engineering University of Brescia25123 BresciaItaly Metallurgy at Department of Mechanical and Industrial Engineering University of Brescia25123 BresciaItaly Anatomy and Physiopathology Division Department of Clinical and Experimental SciencesUniversity of Brescia25123 BresciaItaly

Neurosurgery is a highly specialized field:it often involves surgical manipulation of noble structures and cerebral retraction is frequently necessary to reach deep-seated brain *** are still no reliable methods preventing possible retraction *** objective of this study was to design work chambers well suited for transcranial endoscopic surgery while providing safe retraction of the surrounding brain *** chamber is designed to be inserted close to the intracranial point of interest;once it is best placed it can be *** should guarantee an appreciable workspace similar to that of current neurosurgical *** experimental aspect of this study involved the use of a force sensor to evaluate the pressures exerted on the brain tissue during the retraction *** pterional craniotomy,pressure measurements were made during retraction with the use of a conventional metal spatula with different *** that,although the force values necessary for retraction and exerted on the spatula by the neurosurgeon are the same,the local pressure exerted on the parenchyma at the edge of the spatula at different inclinations varied greatly.A new method of cerebral retraction using a chamber retractor(CR)has been designed to avoid any type of complication due to spatula edge overpressures and to maintain acceptable pressure values exerted on the parenchyma.

关键词： Brain retraction Spatula Brain retractor design Brain retraction injury Retraction complication Transcranial endoscopic surgery

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