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8th International Conference on Electronics, Communication and Aerospace technology, ICECA 2024

作者： Tamilselvi, M. Nalini, N. ramkumar, G. Giri, Jayant Kanan, Mohammad Saveetha University Saveetha School of Engineering Department of Ece Chennai India Vel Tech Rangarajan Dr.Sagunthala R&d Institute of Science and Technology Department of Ece Chennai India Yeshwantrao Chavan College of Engineering Department of Mechanical Engineering Nagpur India Lovely Professional University Division of Research and Development Phagwara India University of Business and Technology College of Engineering Department of Industrial Engineering Jeddah Saudi Arabia Zarqa University College of Engineering Department of Mechanical Engineering Zarqa Jordan

ISBN: (纸本)9798350367904

rice is a vital staple grain grown in numerous countries. rice leaf diseases can result in substantial harm to crop cultivation, resulting in diminished yields and financial losses. Conventional methods for detecting diseases are typically lengthy, entail a lot of effort, and necessitate specialized knowledge. Automated leaf disease detection methods assist farmers in identifying illnesses with minimal or no human intervention. Prior research about this detection of diseases in rice leaves mostly relied on the utilization of image processing and ML methodologies. The agricultural sector extensively necessitates automated identification and examination of rice ailments to prevent the squandering of financial and other resources, minimize crop yield reduction, enhance processing effectiveness, and achieve bountiful and disease-free harvests. The advancements achieved in deep learning methodologies have had a substantial influence on the field of agricultural disease diagnoses. The occurrence of leaf diseases in rice Plants can significantly reduce crop productivity, making it crucial to accurately diagnose these diseases to prevent their negative impact. The majority of the current approaches are insufficient in detecting leaf images and accurately identifying their condition. This study introduces the denseNet201 technique for automatic leaf detection, which offers improved efficiency compared to existing methods. The new approach guarantees a 98 % accuracy rate and a misclassification error value of 0.0167, highlighting the significance of the suggested method compared to the existing one. © 2024 IEEE.

关键词： denseNet201 Image Processing leaf disease Machine Learning misclassification error

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The effect of auditory feedback on user perception during rotary switch operation 24

The effect of auditory feedback on user perception during ro...

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24th International Congress on Acoustics, ICA 2022

作者： Miyairi, Toru Shimomura, Hisato Shirasaka, Takeshi Otomo, Takashi Toi, Takeshi Graduate School of Science and Engineering Chuo University Japan Research and Development Department Tokyo Metropolitan Industrial Technology Research Institute Japan R&D Department Alps Alpine Co. Ltd. Japan Department of Science and Engineering Chuo University Japan

rotary switches are used in various in-vehicle devices and home appliances. It is well known that operating experience contributes to the overall user perception of product quality. This study examines the effect of sound on user perception during rotary switch operation. To this end, experiments were conducted in which participants were asked to evaluate their experience during switch operation corresponding to various values of click torque and in the presence and absence of sound. We used Japanese onomatopoeic expressions to evaluate the magnitude of tactile impressions-the participants rated the degree of consonance between their operating experience and the onomatopoeic expressions in each case on a 7-point scale. The results revealed that the scores of onomatopoeias conveying smooth impressions (e.g.,/suru-suru/) decreased in the presence of sound. In contrast, the scores of onomatopoeias conveying hard impressions (e.g., kata-kata/) increased in the presence of sound. The difference was particularly obvious corresponding to low values of click torque. These conclusions are expected to contribute to the complete understanding of the effects of auditory feedback on the operating experience of rotary switches. © ICA *** rights reserved

关键词： auditory feedback multi-modal perception rotary switch

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Progress in the development of IOWN technology

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NTT Technical review 2022年第5期20卷 11-17页

作者： Kawashima, Masahisa Aragane, Yosuke IOWN Development Office R&D Planning Department NTT Japan The IOWN GF Technology Working Group Japan IOWN Global Forum Japan

Technical improvements in full-stack layers are essential to develop a future infrastructure with higher capacity, lower latency, and lower power consumption toward a cyber-physical society. NTT announced its roadmap for this technology, the Innovative Optical and Wireless Network (IOWN), in April 2020 and has accelerated to implement the roadmap with global partners of the IOWN Global Forum (IOWN GF). IOWN GF developed and published a series of deliverables on Open All-Photonic Network (Open APN), IOWN for Mobile Network, Fiber Sensing for Open APN, data-Centric Infrastructure, IOWN data Hub, and a reference Implementation Model. This article provides an overview of these deliverables and describes the growth of IOWN GF and its activities. © 2022 Nippon Telegraph and Telephone Corp.. All rights reserved.

关键词： Wireless networks

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directed Electron Transport Induced Surface reconstruction of 2d Nife-Ldh/Stanene Heterojunction Catalysts for Efficient Oxygen Evolution

SSRN

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SSrN 2024年

作者： Lu, Ze Wang, Jingkun Zhang, Pengfei Guo, Wenhao Shen, Yongqing Liu, Peizhi Ji, Jianlong Zhao, Min Liang, Haojie Guo, Junjie Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of Education College of Materials Science and Engineering Taiyuan University of Technology Shanxi Taiyuan030024 China Aluminum-Magnesium Based New Material R&D Co. Ltd. Subsidiary of Xing Xian County Economic and Technological Development Zone Xing County Xi'An033600 China

As promising non-noble candidates for oxygen evolution reaction (OEr), NiFe-based layered double hydroxides (NiFe-LdH) has been proven to transform into its high-oxidation-state Ni/Fe oxyhydroxide, which act as the primary active sites. However, advancing the emergence of high-oxidation-state Ni/Fe oxyhydroxide during OEr process currently remains a challenge. Herein, a novel 2d NiFe-LdH/stanene p-n junction catalyst is achieved by inserting stanene between NiFe LdH and Ni foam. Time-dependent raman spectra and density functional theory calculations (dFT) confirm that stanene not only benefits for the construction of built-in electric field, but also serves as an electron absorber to induce a directed electron transport from Ni, Fe to Sn, which thus facilitates the surface reconstruction to form the catalytically active NiOOH. Consequently, an ultralow OEr overpotential (230 mV) at 100 mA cm-2 is achieved, corresponding to a considerable decrease of 22.3 % and 42.1 % compared with the individual NiFe-LdH and stanene, respectively. © 2024, The Authors. All rights reserved.

关键词： density functional theory

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Experimental Study of Wavelet-OFdM radio Communication System for AUVs Under Seawater

Experimental Study of Wavelet-OFDM Radio Communication Syste...

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European Conference on Antennas and Propagation, EuCAP

作者： ryosuke Hasaba Kazuhiro Eguchi Toshiyuki Wakisaka Hiroshi Satoh Jiro Hirokawa Miyuki Hirose Tohlu Matsushima Yuki Fukumoto Yuya Nishida Kazuo Ishii Department of Electrical and Electronic Engineering Tokyo Institute of Technology Tokyo Japan Department of Electrical and Electronic Engineering Kyushu Institute of Technology Fukuoka Japan R&D Division Panasonic Connect Co. Ltd. Fukuoka Japan Development Center Panasonic System Networks R&D Lab. Co. Yokohama Japan

AUVs are used for marine resource exploration, and although acoustic, laser, etc., are often used for wireless communication for AUVs, wireless communication using rF signals is being studied. By placing the VNA in a waterproof container, we measured the insertion loss between the antennas under seawater and obtained good results with simulation results. Furthermore, using a Wavelet-OFdM module as the communication method, a maximum communication speed of 6.8 Mbps was achieved with the antennas embedded in the AUV immersed in seawater.

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Flow numerical simulation of tubing or casing leakage in gas well

Flow numerical simulation of tubing or casing leakage in gas...

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Abu dhabi International Petroleum Exhibition and Conference 2020, AdIP 2020

作者： Zhang, Hong Yuan, Guangjie Li, Guotao Li, Jingcui Wan, Jifang Fu, Pan CNPC Engineering Technology R&D Company Limited Research Institute of Petroleum Exploration and Development CNPC Engineering Technology R&D Company Limited

ISBN: (纸本)9781613997345

Tubing or casing leakage of HTHP gas wells and underground gas storage wells affects wellbore integrity adversely. The wellbore micro-leakage detection technology can detect tiny fluid leakage in time and is of great significance to avoid malignant gas leakage accident. The theoretical basis of wellbore microleakage detection technology is characterizing the leakage flow field. To reveal the flow characteristics of gas leakage due to tubing and casing cracks and perforations, a CFd model of gas aperture leak has been established and flow field numerical simulation of high-speed and high-pressure gas outflow through aperture was conducted. The standard k-e turbulence model was used to calculate and analyze the pressure and velocity distribution of the steady flow field. In addition, a time step was set on the steady-state model and the Scale-Adaptive Simulation (SAS) model was adopted to simulate the transient flow field with the initial conditions of the steady-state simulation results. The effects of the shape and size of the leakage hole, the pressure inside the pipe, and the medium in the outer annular space on the flow field were analyzed. The results show that obvious turbulence disturbance appears near the inlet of the leakage hole and supersonic under-expansion jet forms near the outlet of the leakage hole under the gas well working conditions, creating the expansion wave and shock wave. The flow velocity of gas leakage through the circular hole is the highest, while that of the slot hole is the lowest under the same conditions. The larger the leakage aperture is, the greater the pressure difference between inside and outside of the pipe is, and the more drastic variation of gas velocity in the leakage hole. The method and results provide theoretical guidance for the microleakage detection technology of gas well wellbore. © 2020, Society of Petroleum Engineers

关键词： Flow fields

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Enhanced Magnetic Interaction between Ga and Fe in Two-dimensional van der Waals Ferromagnetic Crystal Fe_(3)GaTe_(2)

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Chinese Physics Letters 2023年第8期40卷 108-112页

作者：查鹤鸣李炜张高节刘文晶邓力玮姜琦叶茂武浩常海欣乔山 State Key Laboratory of Functional Materials for Informatics Center for Excellence in Superconducting ElectronicsShanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Department of Physics and State Key Laboratory of Surfac Physics Fudan UniversityShanghai 200433China State Key Laboratory of Material Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan National High Magnetic Field Center and Institute for Quantum Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Center for Transformative Science ShanghaiTech UniversityShanghai 201210China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Shenzhen R&D Center of Huazhong University of Science and Technology Shenzhen 518000China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Fe_(3)GaTe_(2),a recently discovered van der Waals ferromagnetic crystal with the highest Curie temperature and strong perpendicular magnetic anisotropy among two-dimensional(2d)magnetic materials,has attracted significant attention and makes it a promising candidate for next-generation spintronic *** with Fe_(3)GeTe_(2),which has the similar crystal structure,the mechanism of the enhanced ferromagnetic properties in Fe_(3)GaTe_(2)is still unclear and needs to be ***,by using x-ray magnetic circular dichroism measurements,we find that both Ga and Te atoms contribute to the total magnetic moment of the system with antiferromagnetic coupling to Fe *** first-principles calculations reveal that Fe_(3)GaTe_(2)has van Hove singularities at the Fermi level in nonmagnetic state,resulting in the magnetic instability of the system and susceptibility to magnetic phase *** addition,the calculation results about the density of states in ferromagnetic states of two materials suggest that the exchange interaction between Fe atoms is strengthened by replacing Ge atoms with Ga *** findings indicate the increase of both the itinerate and local moments in Fe_(3)GaTe_(2)in view of Stoner and exchange interaction models,which results in the enhancement of the overall magnetism and a higher Curie *** work provides insight into the underlying mechanism of Fe_(3)GaTe_(2)’s remarkable magnetic properties and has important implications for searching 2d materials with expected magnetic properties in the future.

关键词： magnetic ferromagnetic mechanism

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INTrOdUCTION OF SPErA HYdrOGEN SYSTEMTM FOr MASSIVE HYdrOGEN STOrAGE ANd TrANSPOrTATION 23

INTRODUCTION OF SPERA HYDROGEN SYSTEMTM FOR MASSIVE HYDROGEN...

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23rd World Hydrogen Energy Conference: Bridging Continents by H2, WHEC 2022

作者： Okada, Yoshimi Imagawa, Kenichi Kawai, Hironori Mikuriya, Tomoyuki Yagi, Fuyuki Kaji, Naohiro Chiyoda Croporation Technology Development Department Hydrogen Business Department 4-6-2 Minatomirai Nishi-ku Yokohama2208765 Japan Chiyoda Croporation R&D Center Technology Development Department 3-13 Moriya-cho Kanagawa-ku Yokohama2208765 Japan Chiyoda Croporation Technology Development Department 4-6-2 Minatomirai Nishi-ku Yokohama2208765 Japan Chiyoda Croporation Hydrogen Business Department 4-6-2 Minatomirai Nishi-ku Yokohama2208765 Japan

ISBN: (纸本)9786250008430

Hydrogen energy carrier system is indispensable for decarbonisation through the expansion of renewable energy. The organic chemical hydride method for storing and transporting hydrogen under normal temperature and pressure conditions in the liquid state by incorporating hydrogen atoms into the molecular structure of liquid organic hydrogen carrier (LOHC) is safe and low risk method. Chiyoda started the development of a system employing the method since 2002, named the system "SPErA HydrogenTM" and system completed the international demonstration of massive hydrogen supply chain from Brunei darussalam to Japan in 2020. It is the only system that has completed the international demonstration of the entire process and has moved to the commercialization stage. It is considered that the system is the most inexpensive except ammonia direct combustion with boiler at present and also has a high potential for cost reduction towards the future compared to other methods. © 2022 Proceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2. All rights reserved.

关键词： Supply chains

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Multi-spectral uncooled infrared sensors fabricated using encapsulated metal–insulator–metal plasmonic metamaterial absorbers 49

Multi-spectral uncooled infrared sensors fabricated using en...

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Infrared technology and Applications XLIX 2023

作者： Ogawa, Shinpei Ueno, Hiroshi Yamagishi, Takatoshi Tomii, Hideaki Yamamoto, Hiroshi Takenouchi, Sho Kimata, Masafumi Advanced Technology R&D Center Mitsubishi Electric Corporation 8-1-1 Tsukaguchi-Honmachi Amagasaki Hyogo661-8661 Japan Research & Development Center Nohmi Bosai Ltd. 1-18-13 Chuo Misato Saitama341-0038 Japan Product Development Business Kodenshi Corp. 161 Jyuichi Makishima-cho Uji Kyoto611-0041 Japan 2-1-9 Suimeidai Kawanishi Hyogo666-0116 Japan

ISBN: (数字)9781510661837

ISBN: (纸本)9781510661820

Multispectral uncooled infrared (Ir) sensors are attracting interest for use in applications such as gas analysis, hazardous material recognition, and biological analysis. However, conventional sensors require additional filters or a resonant structure in the vertical direction. To address this challenge, we investigated plasmonic metamaterial absorbers (PMAs) such as plasmonic crystals (PCs), metal–insulator–metal (MIM), and mushroom-type PMAs. Such PMAs exhibit wavelength-selective absorption by surface plasmon resonance (SPr, and the absorption wavelength can be controlled by modifying the features of the surface pattern (e.g., the periodicity of dimples and the micropatch size). Previously, we fabricated thermopiles with PC-type PMAs and used them for wavelength-selective detection. Although PC-type PMAs have advantages such as easy fabrication, robustness against structural fluctuations, and a wide operating wavelength range, they suffer from an incidence-angle dependence and require a large absorber volume. Here, we fabricated thermopiles with encapsulated MIM (EMIM)-type PMAs using a complementary metal oxide semiconductor process. The devices consist of a top encapsulated layer, periodic top micropatches, a flat insulator layer, and a bottom reflector. The encapsulated layer functions as a protective layer. Like MIM-type PMAs, the EMIM-type PMAs exhibit incidence-angle independence and a thin absorber volume, where the top micropatch induces localized SPr with the bottom reflector, and its size mainly determines the absorption wavelength. Spectral measurements showed that wavelength-selective Ir detection can be performed in the mid-Ir wavelength range without any additional filters. We expect the obtained results to contribute to the realization of advanced functional uncooled Ir sensors and expand their range of applications. © 2023 SPIE.

关键词： CMOS integrated circuits

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Investigation on cutting fluid use in finish milling of polylactide (PLA) 3d-printed parts 20

Investigation on cutting fluid use in finish milling of poly...

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20th CIrP Conference on Modeling of Machining Operations in Mons, CIrP CMMO 2025

作者： Lorenzoni, Margaux Spitaels, Laurent rivière-Lorphèvre, Edouard Odent, Jérémy M'Saoubi, rachid Cloëz, Liam Fontaine, Michaël ducobu, François Machine Design and Production Engineering Lab Research Institute for Materials Science and Engineering University of Mons Place du Parc 20 Mons7000 Belgium University of Mons Place du Parc 20 Mons7000 Belgium R&D Material and Technology Development Seco Tools AB Björnbacksvägen 2 FagerstaSE-737 82 Sweden Department of Mechanical Engineering Sciences Division of Production and Materials Engineering Lund University Ole Römers väg 1 LundSE-221 00 Sweden FEMTO-ST Institute-Applied Mechanics Dept. Université de Franche-Comté-SUPMICROTECH-CNRS Rue de l'épitaphe 24 BesançonF-25000 France

Fused Filament Fabrication (FFF) is an additive manufacturing process based on material Extrusion (MEX) of polymeric filament. This manufacturing technology is commonly used for personalized production applications and prototyping, allowing to obtain customized parts with complex geometries at a low cost. However, this production technique has its limitations regarding dimensional accuracy and surface roughness of the final parts. To overcome these limitations, finish milling is considered to be a promising technique as it is widely used for metallic parts. Yet, the specific thermal properties of polymers such as low thermal conductivity and low melting temperature are adding a challenge in the determination of optimal cutting conditions. In this context, the use of cutting fluid could be the key to keep the material from melting during milling. Therefore, this paper proposes to compare the impact of using a compressed air flow to dry conditions on the cutting forces and the surface quality obtained on 3d-printed polylactide (PLA) parts. The qualification test of the tool-material couple standard (NF E 66-520-6) will be used as a guideline to determine the relevance of cutting fluid use for cutting conditions varying around an operating point. Moreover, simulated cutting forces using a mechanistic model will be compared to experimental data to evaluate the applicability of the model. © 2025 The Authors.

关键词： Compressed air

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