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2025 International Conference on Electronics, Information, and Communication, ICEIC 2025

作者： Kim, Seongwook Byeon, Gwangeun Lee, Seungeui Bae, Youngseok Hong, Seokin Sungkyunkwan University Department of Electrical and Computer Engineering Suwon Korea Republic of Advanced R&D Center Hanwha Systems Co. Ltd. Korea Republic of Agency for Defense Development Emerging Science and Technology Directorate Korea Republic of

ISBN: (纸本)9798331510756

Since deep learning inference involves a significant amount of computations, there have been a lot of efforts to accelerate the inference process by eliminating ineffectual compu-tations. As a solution to this problem, several sparsity-aware deep learning accelerators have been proposed. These accelerators perform the inference on compressed data (filters and feature maps) and dynamically remove the ineffectual multiplications with zero operands. For efficiently handling the compressed data on the accelerators, a simple and effective compression scheme, which encodes the whole data with its nonzero values and their positions, is necessary. However, prior approaches have several shortcomings, such as low compression efficiency and high complexity in compression and decompression hardware. This paper proposes a low-cost compression scheme that can be applied to sparsity-aware deep-learning accelerators. The compression scheme synergistically combines two low-cost compression schemes: Zero-Value Compression (ZVC) and Base-delta-Immediate Compression (BdI). Our experimental evaluation shows that the proposed compression scheme achieves an average compression ratio of 2.26, resulting in 2.33x performance improvement, © 2025 IEEE.

关键词： data handling

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design and implementation of the second-generation COSPAS-SArSAT distress beacon based on Sdr 6

Design and implementation of the second-generation COSPAS-SA...

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6th IEEE International Conference on Automation, Electronics and Electrical Engineering, AUTEEE 2023

作者： renle, Zheng Wenxue, Liu Chaosan, Yang Jintao, Wan dongyang, Li Jinhai, Li Imecas Communications and Information Engineering R&d Center Beijing China Imecas New Technology Development Department Beijing China

ISBN: (纸本)9798350305623

COSPAS-SArSAT has currently completed the design of a new generation distress beacon systems, namely the second-generation distress beacon system. The second-generation distress beacon adopts dSSS-OQPSK as its basic signal modulation mode, while adopting a new signal detail structure. This paper provides a solution for the hardware implementation of the second-generation COSPAS-SArSAT distress beacon on Software-defined radio (Sdr). Firstly, the baseband signal that meets the definition format of the second-generation beacon standard was generated, and then the second-generation beacon was transmitted through the Universal Software radio Peripheral (USrP). By comparing with specific requirements of the second-generation distress beacon standard, the second-generation beacon generated by this paper can meet the requirements of the second-generation COSPAS-SArSAT distress beacon standard, and the method proposed in this paper has the advantages of flexibility and higher signal reconfigurability. © 2023 IEEE.

关键词： COSPAS-SArSAT dSSS-OQPSK Sdr second-generation distress beacon

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A study of highly activated hydrogen evolution reaction performance in acidic media by 2d heterostructure of N and S doped graphene on MoO_(x)

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Carbon Energy 2023年第11期5卷 68-80页

作者： Kubra Aydin Seongwon Woo Vinit Kaluram Kanade Seulgi Choi Chisung Ahn Byungkwon Lim Taesung Kim SKKU Advanced Institute of Nanotechnology(SAINT) Department of Nano Science and TechnologySungkyunkwan UniversitySuwon‐siGyeonggi‐doRepublic of Korea School of Advanced Material Science and Engineering Department of Nano Science and TechnologySungkyunkwan UniversitySuwonGyeonggi‐doRepublic of Korea School of Mechanical Engineering Sungkyunkwan UniversitySuwon‐siGyeonggi‐doRepublic of Korea Heat&Surface Technology R&D Department Korea Institute of Industrial TechnologySiheung‐siGyeonggi‐doRepublic of Korea

Herein,a layer of molybdenum oxide(MoO_(x)),a transition metal oxide(TMO),which has outstanding catalytic properties in combination with a carbonbased thin film,is modified to improve the hydrogen production performance and protect the MoO_(x)in acidic media.A thin film of graphene is transferred onto the MoO_(x)layer,after which the graphene structure is doped with N and S atoms at room temperature using a plasma doping method to modify the electronic structure and intrinsic properties of the *** oxygen functional groups in graphene increase the interfacial interactions and electrical contacts between graphene and MoO_(x).The appearance of surface defects such as oxygen vacancies can result in vacancies in MoO_(x).This improves the electrical conductivity and electrochemically accessible surface *** the number of defects in graphene by adding dopants can significantly affect the chemical reaction at the interfaces and improve the electrochemical *** defects in graphene play a crucial role in the adsorption of H^(+)ions on the graphene surface and their transport to the MoO_(x)layer *** enables MoO_(x)to participate in the reaction with the doped graphene.N^(‐)and S^(‐)doped graphene(NSGr)on MoO_(x)is active in acidic media and performs well in terms of hydrogen *** initial overpotential value of 359 mV for the current density of−10 mA/cm^(2)is lowered to 228 mV after activation.

关键词： heteroatom‐doped graphene hydrogen evolution reactions metal‐free catalysts transition metal oxides van der Waals(vdWs)heterostructures

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16-1: The Challenge and development in Ar-HUd

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SId Symposium digest of Technical Papers 2024年第S1期55卷 134-137页

作者： Fushun Wan Shanshan Zhang Jiandong Wang Xiongping Li Technology Development Department Shanghai Tianma R&D Center Shanghai China

With the development of intelligent network technology, the vehicle has gradually changed from a kind of transportation to a "third living space" for human beings. People need more intelligent and emotional vehicle functions, while traditional dashboards have been unable to meet the needs of human-car interaction. In this context, the head-up display (HUd) came into the public vision. While augmented reality head-up display (Ar-HUd) brings intelligent driving experience, it also brings more stringent requirements for related components. In this paper, we will highlight the challenge and development in Ar-HUd.

关键词： Ar-HUd challenge development

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Organic matter occurrence and pore-forming mechanisms in lacustrine shales in China

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Petroleum Science 2022年第4期19卷 1460-1472页

作者： Li-Chun Kuang Lian-Hua Hou Song-Tao Wu Jing-Wei Cui Hua Tian Li-Jun Zhang Zhong-Ying Zhao Xia Luo Xiao-Hua Jiang Science and Technology R&D Department CNPCBeijing100000China Research Institute of Petroleum Exploration and Development CNPCBeijing100083China National Energy Tight Oil and Gas R&D Center Beijing100083China Key Laboratory of Oil and Gas Reservoirs CNPCBeijing100083China

The evolution of pore structure in shales is affected by both the thermal evolution of organic matter(OM)and by inorganic diagenesis,resulting in a wide variety of pore *** paper examines the OM distribution in lacustrine shales and its influence on pore structure,and describes the process of porosity *** principal findings are:(i)Three distribution patterns of OM in lacustrine shales are distinguished;laminated continuous distribution,clumped distribution,and stellate scattered *** differences in total organic carbon(TOC)content,free hydrocarbon content(S_(1)),and OM porosity among these distribution patterns are discussed.(ii)Porosity is negatively correlated with TOC and plagioclase content and positively correlated with quartz,dolomite,and clay mineral content.(iii)Pore evolution in lacustrine shales is characterized by a sequence of decreasing-increasing-decreasing porosity,followed by continuously increasing porosity until a relatively stable condition is reached.(iv)A new model for evaluating porosity in lacustrine shales is *** this model,the organic and inorganic porosity of shales in the Permian Lucaogou Formation are calculated to be 2.5%-5%and 1%-6.3%,respectively,which correlate closely with measured *** findings may provide a scientific basis and technical support for the sweet spotting in lacustrine shales in China.

关键词： Shale oil Unconventional oil and gas Organic matter Pore evolution Log interpretation model

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role of solute elements in Mg-Mg_(2)Ni hydrogen storage alloys:A first-principles calculation study

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Journal of Magnesium and Alloys 2024年第11期12卷 4574-4593页

作者： Min-Seok Yoon Jae Hur Seo-Hui Park Ui-Jong Lee Guanglong Xu Hyung-Ki Park Byeong-Chan Suh Young Min Kim Won-Seok Ko Department of Materials Science and Engineering Inha UniversityIncheon 22212Republic of Korea College of Materials Science and Engineering Nanjing Tech UniversityNanjing 211816China Functional Materials and Components R&D Group Korea Institute of Industrial TechnologyGangneung 25440Republic of Korea Advanced Metals Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea Advanced Materials Engineering University of Science and TechnologyDaejeon 34113Republic of Korea

The effects of various alloying elements on the performance of Mg-Mg_(2)Ni hydrogen storage alloys were investigated by performing firstprinciples density functional theory *** examined the important characteristics of hydrogen storage alloys by considering both Mg-based solid solution and Mg_(2)Ni-based intermetallic compound phases,where the hydride forms are Mg H2and Mg_(2)NiH4,*** particular,qualitatively valid information for predicting changes in plateau pressures in the pressure-composition-temperature(PCT)curve was provided by calculating changes in the energy of related hydrogenation *** effects of alloying elements on volume changes due to hydrogenation reactions were also obtained to provide additional criteria for the practical use of hydrogen storage *** the Mg_(2)Ni-based intermetallic compound,we examined the site preference of each alloying element,considering the designated stoichiometry of the base *** on the revealed site preferences,the effects of various possible alloying elements on the properties of Mg_(2)Ni-based hydrides were also *** structure analyses were further conducted to elucidate the detailed mechanisms underlying the role of the additional solute elements.

关键词： Mg-Mg_(2)Ni alloys density functional theory Hydrogen storage alloys Metal hydrides

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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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development of High Temperature resistant Soft Metal Sealing Components in downhole Tools

Development of High Temperature Resistant Soft Metal Sealing...

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2024 International Petroleum technology Conference, IPTC 2024

作者： Guo, Huijuan Li, Jianghao Song, Xiping Guodong, david Zhan Wang, Baodong Drilling Mechanical Department CNPC Engineering Technology R&D Company Limited China State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing China Drilling Technology Division EXPEC Advanced Research Center Saudi Aramco Saudi Arabia

ISBN: (纸本)9781959025184

The sealing components plays the role of sealing and pressure resistance of downhole tools, which is a key component that determines the safe and reliable operation of downhole tools. With the development of oil and gas exploitation towards deep and ultra-deep wells, the performance requirements of sealing components for downhole tools are gradually improved. rubber materials are prone to aging and deterioration in downhole high temperature and corrosive environment, resulting in sealing failure and difficulty in maintaining good sealing for a long time. Soft metal materials have the characteristics of high temperature resistance, high sealing pressure and corrosion resistance. The application of high temperature resistant soft metal materials in petroleum engineering sealing components can better solve the problem of aging failure of rubber sealing components, which is of great significance for ensuring the safety of downhole sealing. Based on the introduction of the application of soft metal materials in petroleum engineering, this paper studies the refining method of copper-based soft metal materials, and determines the formula of soft metal materials with excellent performance by analyzing the microstructure of soft metal materials. Based on the developed soft metal material, the high temperature tensile mechanical properties test, high temperature elastic modulus test were carried out. The feasibility of using copper-based soft metal as sealing element in petroleum engineering was analyzed, and the soft metal sealing element for expansion pipe sealing was designed. The research results show that: (1) Metal material seals have been widely studied at home and abroad, and some products have been maturely applied in the market, with good mechanical properties and sealing performance. (2) By adding Ga, rh, Si and other alloying elements to copper metal, the metal wettability, temperature resistance and elastic properties of the material can be improved, and the seal

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Mixed Eccentricity detection by Identification of Harmonic Order of No-load Line-line Voltages in Multi-three-phase PMSMs 26

Mixed Eccentricity Detection by Identification of Harmonic O...

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26th International Conference on Electrical Machines and Systems, ICEMS 2023

作者： Okazaki, Kodai Akatsu, Kan Yang, Kan Mitsubishi Electric Corporation Advanced Technology R&D Center Hyogo Japan Yokohama National University Department of Electrical Engineering Kanagawa Japan

ISBN: (纸本)9798350317589

Permanent magnet synchronous motors (PMSMs) have many advantages such as high efficiency. As they are widely utilized for many applications, requirements of less noise and fewer vibrations increase. For a suppression control to the vibration caused by air-gap imbalances, using multi-three-phase PMSMs are suitable method because they can use common three phase inverters. We must detect the air-gap imbalances including static eccentricity and dynamic eccentricity to the suppression control. This paper proposes a method that separately detects static and dynamic eccentricity considering characteristics of the harmonic components of no-load line-line voltages. The method confirms its detection ability by a finite element analysis (FEA) model with eccentricity. © 2023 IEEE.

关键词： Permanent magnets

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Homogenization on solution treatment and its effects on the precipitation-hardening of selective laser melted 17-4PH stainless steel

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Journal of Materials Science & technology 2023年第35期166卷 47-57页

作者： Sohee An du-rim Eo Il Sohn Kyunsuk Choi Department of Materials Science and Engineering Yonsei UniversitySeoul03722Republic of Korea Advanced Joining&Additive Manufacturing R&D Department Korea Institute of Industrial Technology(KITECH)529 Seohaean-roSiheung 15014Republic of Korea Department of Industry-University Convergence Hanbat National UniversityYuseongDaejeon34158Republic of Korea

17-4 precipitation-hardened(PH)stainless steel(SS)exhibits high strength and good corrosion resistance via Cu-precipitation *** conventional wrought 17-4PH SS,Cu segregation andε-Cu pre-cipitates are observed in additively manufactured(AM)17-4PH SS owing to the repeated rapid cooling after heating,which characterizes the AM *** this study,solution treatment was conducted under various temperatures(1,000,1,050,1,100,and 1,200℃)and durations(1,2,4,and 8 h)to minimize the negative effects of Cu segregation andε-Cu precipitates on precipitation *** mechanical prop-erties and microstructures of each condition for the Cu precipitation behavior were *** theε-Cu precipitates did not disappear after solution treatment,the average diameter of theε-Cu precipi-tates tended to decrease with increasing solution treatment temperature and ***,solution treatment at a temperature of 1,200℃ for 8 h was the best,resulting in improved strength compared to the conventional solution treatment at 1,050℃.Solution treatment on at least 1,100℃ is effective in AM.

关键词： Selective laser melting Cu segregation Solution treatment 17-4 Precipitation-hardened stainless steel Additive manufacturing

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