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Annual International Symposium on reliability Physics

作者： Hyojun Choi Giuk Kim Hunbeom Shin Yunseok Nam Sanghun Jeon Kwangsoo Kim Suhwan Lim Jongho Woo Wanki Kim daewon Ha Jinho Ahn Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon Korea Semiconductor R&D Center Samsung Electronics Co. Ltd Suwon Korea Material Science and Engineering Hanyang University Seoul Korea

ISBN: (数字)9798331504779

ISBN: (纸本)9798331504786

We demonstrate a novel Ferroelectric FET (FeFET) configuration designed to expand memory window (MW) and enhance retention via two approaches: (i) the introduction of a charge trap layer (CTL) and (ii). the adoption of anti-ferroelectric (AFE) material. The retention loss in metal-interlayer (IL)-ferroelectric (FE)-IL-silicon (MIFIS) FeFET is ascribed to the negative feedback loop, involving the de-trap of interface trap charge from gate (Qit‘) and the loss of polarization (P) which mutually accelerates the further loss of the other. Our first approach, CTL on top of FE, provides additional trap sites with deep trap levels which introduces favorable charge (QN) with high stability, thus enhancing both MW and retention. Moreover, by utilizing the high spontaneous polarization (Ps) and low remanent polarization (Pr) nature of AFE, we further improved the retention characteristics by increasing the proportion of QN and decoupling the negative feedback loop. By proposing a new FeFET design with a high MW (~12.9 V), a low operation voltage (+17/-14 V), and enhanced data retention, we suggest that the hafnia-based FeFET can be a big step forward for 3d NANd technology.

关键词： Three-dimensional displays Nonvolatile memory Voltage Logic gates Iron Negative feedback loops reliability FeFETs Thermal stability Physics

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research on the Influence of the Stroke of the Pressing-Up Cylinder of rolling Mills on Vibration Characteristics

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Journal of Vibration Engineering and Technologies 2025年第5期13卷 1-10页

作者： Weiquan, Sun Xiaoqiang, Yan Shen, Wang Chenggang, Wang Xingdou, Jia Yujie, Liu School of Mechanical Engineering University of Science and Technology Beijing 30 XueYuan Road HaiDian District Beijing 100083 China Department of Aeronautics and Astronautics Massachusetts Institute of Technology 77 Massachusetts Ave Cambridge 02139 MA United States Hot Rolling Department Shougang Zhixin Qian’an Electromagnetic Material Co. Ltd No. 025 Zhao’an Street Qian’an Economic Development Zone Hebei Province Hebei Tangshan 064400 China Lithography Machine R & D Department The 45th Research Institute of China Electronics Technology Group Corporation No. 1 Taihe 3rd Street Beijing Economic and Technological Development Zone Beijing 100176 China

Purpose: In order to analyze the on-site phenomenon that the 20-high rolling mill is prone to vibration when the diameter of the roll system is small, the influence of the elongation of the piston rod and the height of the hydraulic oil column on the vibration characteristics of the 20-high rolling mill was analyzed. Methods: Two kinds of simulation limit states are designed, the first is the maximum diameter of the working roll, the first intermediate roll and the second intermediate roll, and the second is the smallest diameter of the working roll, the first intermediate roll and the second intermediate roll. At the same time, the dynamic vibration characteristics of the whole machine were analyzed under these two conditions, considering the elongation of the piston rod of the press-on cylinder and the combination of the elongation of the piston rod of the press-on cylinder and the height of the hydraulic oil column. results: When the elongation of the piston rod of the cylinder is considered alone, the vibration frequency of the rolling mill is abundant, but the vibration amplitude is low. In the context of integrating the elongation of the piston rod from the pressure cylinder with the height of the hydraulic oil column, experimental observations indicate that the rolling mill exhibits a reduced vibration amplitude under the first limit state compared to the second. However, analyses further reveal that both limit states demonstrate a lower frequency concentration and diminished high-frequency vibration amplitudes. Conclusions: The research results provide a theoretical reference for further analysis of the influence of hydraulic oil column flow characteristics on rolling mill vibration. © Springer Nature Singapore Pte Ltd. 2025.

关键词： 20-High rolling mill Hydraulic oil column height Piston rod elongation roll diameter limit state rolling mill vibration

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Accelerating deep Neural Networks with a Low-Cost Lossless Compression

Accelerating Deep Neural Networks with a Low-Cost Lossless C...

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International Conference on Electronics, Information and Communications (ICEIC)

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

ISBN: (数字)9798331510756

ISBN: (纸本)9798331510763

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,

关键词： deep learning Filters Artificial neural networks Performance gain Complexity theory Hardware acceleration

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domain Wall Structure Model through the Thickness of Fe–Si Sheet Studied by X ray Topography

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ISIJ International 2025年第2期65卷 326-330页

作者： Kataoka, Takashi Kawamura, Yusuke Futagi, Toshiro Ushigami, Yoshiyuki Ibaraki College 866 Nakane Hitachinaka-City Ibaraki312-8508 Japan Steel Research Laboratories Technical Research & Development Bureau NIPPON STEEL CORPORATION 20-1 Shintomi Futtsu-City Chiba293-0011 Japan Physical Characterization Solutions Div. R&D Supporting Unit NIPPON STEEL TECHNOLOGY Co. Ltd. 20-1 Shintomi Futtsu-City Chiba293-0011 Japan NIPPON STEEL TECHNOLOGY Co. Ltd. 2-1 Tobihata-cho Tobata-ku Kitakyushu-City Fukuoka804-0001 Japan

Fe–Si sheet, which has {110} crystal orientation (Goss-FeSi), consists of Basic domain and Lancet-comb domain. Although the geometric structures of the Lancet-comb domain have been predicted by theoretical aspects, they have not been proved by experimental studies. In this paper, we study the Lancet-comb domain structures of a Fe–Si steel by a volume sensitive method, i.e., transparent X-ray topography (XrT). From the XrT results, we found the parallelogram structures, which is bulk structure of the Lancet-comb domain. The long side of the parallelogram forms about 55° angle to the rolling direction and the short side forms about 35° angle to the rolling direction. We assigned the long side of the parallelogram to {110} domain wall and the short side to {111} domain wall based on the geometric analysis. This Lancet-comb domain model well explains the behavior of the magnetic moments of Goss-FeSi. © 2025 The Iron and Steel Institute of Japan.

关键词： Silicon steel

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Ultrastrong and ductile martensitic low-density steel achieved by local strain partitioning into ferrite and delayed TrIP effect

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Journal of materials Science and technology 2025年 238卷 238-249页

作者： Chung, Hyun Lee, Sangwon Ko, Seokwoo Hwang, Sun Uk Zargaran, Alireza Sohn, Seok Su Department of Materials Science and Engineering Korea University Seoul02841 Korea Republic of Product Development Group SeAH Besteel Corporation R&D Center Gunsan54007 Korea Republic of Graduate Institute of Ferrous & Energy Materials Technology Pohang University of Science and Technology Pohang37673 Korea Republic of

Martensitic-based microstructures in low-density steels offer high strength and improved specific strength, combined with the lightweight effect of aluminum (Al). However, while Al effectively reduces density, it simultaneously promotes the formation of coarse ferrite and expands the two-phase (α + γ) intercritical temperature range. Thus, increasing the Al content for higher weight reduction inevitably leads to ferrite formation and impedes further strengthening. To achieve both high strength and ductility while incorporating ferrite, it is crucial to elucidate the effects of ferrite fraction, size, and distribution on mechanical properties and deformation behavior, particularly in relation to phase interactions. In this study, three model steels were developed through controlled annealing temperatures, producing distinct triplex microstructures comprising ferrite, martensite, and retained austenite (rA). The role of each phase in strain partitioning was investigated using ex-situ microscopic digital image correlation and electron back-scattered diffraction analysis. Key findings reveal that the martensitic matrix ensures an ultrahigh strength level (1758 MPa), while a moderate fraction (∼17 %) and homogeneous distribution of intercritical-ferrite (IC-ferrite) enable sustainable strain-hardening behavior by delaying the transformation-induced plasticity (TrIP) effect. Strain partitioning into IC-ferrite reduces local strains in the martensitic matrix, preventing early exhaustion of the TrIP effect and facilitating ductile fracture behavior. This strategy leverages the presence of ferrite, offering significant advantages for applications requiring both ultrahigh strength and ductility. © 2025

关键词： Fracture mechanics

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Experimental Analysis of Compression deformation at High-Temperatures and Numerical Simulation for BaTiO3 Sintered Compacts

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Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 2025年 72卷 S277-S280页

作者： Tanaka, Hiroyuki Matsubara, Hideaki Yokota, Hideaki Iguchi, Toshihiro Takagi, Yuko Nomura, Hiroshi Terasaka, Sota Igimi, daisuke Technology HQ TDK Corporation 2-15-7 Higashi-Ohwada Ichikawa272-8588 Japan Graduate School of Environmental Studies Tohoku University 6-6-20 Aramaki Aza Aoba-ku Sendai980-8579 Japan Prior Art Development Dept Ceramics condenser BG TDK Corporation 570-2 Matsugashita Minamihatori Narita282-8558 Japan Materials R&D Lab Japan Fine Ceramics Center 2-4-1 Mutsuno Atsuta-ku Nagoya456-8587 Japan

Uni-axial compression tests were performed to derive yield stress equation, flow rules and coefficient of flow stress of BaTiO3 sintered compaction. These basic equations and their physical properties were introduced into the FEM. The drooping behavior of the thin-thickness specimen during the sintering was simulated and compared to the experimental drooping, where the specimens were composed of large or small average diameter BaTiO3, respectively. resulting simulation drooping quantitatively reproduces that experiment. This result suggests that experimentally derived yield stress equation, non-Newtonian viscoplastic flow rule σeq = FΕ0Ε0.8 and coefficient of flow stress about several to 1000 GPa s of sintered BaTiO3 compaction were numerically validated. ©2025 Japan Society of Powder and Powder Metallurgy.

关键词： Yield stress

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Intelligent evaluation of sandstone rock structure based on a visual large model

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Petroleum Exploration and development 2025年第2期52卷 548-558页

作者： rEN, Yili ZENG, Changmin LI, Xin LIU, Xi HU, Yanxu SU, Qianxiao WANG, Xiaoming LIN, Zhiwei ZHOU, Yixiao ZHENG, Zilu HU, Huiying YANG, Yanning HUI, Fang PetroChina Research Institute of Petroleum Exploration & Development Beijing 100083 China Artificial Intelligence Technology R&D Center of Exploration and Development CNPC Beijing 100083 China National Key Laboratory for Multi-resources Collaborative Green Production of Continental Shale Oil Daqing 163000 China PetroChina Tarim Oilfield Company Korla 841000 China Xinjiang Key Laboratory of Ultra-deep Oil and Gas Korla 841000 China Research Institute of Petroleum Exploration and Development PetroChina Huabei Oilfield Company Renqiu 062552 China Peking University Beijing 100871 China PetroChina Changqing Oilfield Company No.6 Oil Production Plant Xi'an 710200 China

Existing sandstone rock structure evaluation methods rely on visual inspection, with low efficiency, semi-quantitative analysis of roundness, and inability to perform classified statistics in particle size analysis. This study presents an intelligent evaluation method for sandstone rock structure based on the Segment Anything Model (SAM). By developing a lightweight SAM fine-tuning method with rank-decomposition matrix adapters, a multispectral rock particle segmentation model named CoreSAM is constructed, which achieves rock particle edge extraction and type identification. Building upon this, we propose a comprehensive quantitative evaluation system for rock structure, assessing parameters including particle size, sorting, roundness, particle contact and cementation types. The experimental results demonstrate that CoreSAM outperforms existing methods in rock particle segmentation accuracy while showing excellent generalization across different image types such as CT scans and core photographs. The proposed method enables full-sample, classified particle size analysis and quantitative characterization of parameters like roundness, advancing reservoir evaluation towards more precise, quantitative, intuitive, and comprehensive development. © 2025 research Institute of Petroleum Exploration & development, PetroChina

关键词： fine-tuning intelligent evaluation particle edge extraction rock structure sandstone Segment Anything Model type identification

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Carbon compounds, internal stress and hydrogen permeability in carbon-doped TiZrN coatings by laser ablation

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Ceramics International 2025年

作者： Kim, Seonghoon Hong, Eunpyo Choi, Young-kyu Lee, Seahoon Lee, Youngjae Choi, Yongsup Lee, Heesoo Extreme Materials Research Institute Korea Institute of Materials Science Changwon51508 Korea Republic of Mechanical & Material Technology Center Korea Testing Laboratory Jinju52852 Korea Republic of Research Institute of Sustainable Development Technology Low-Carbon Emission Control R&D Department Korea Institute of Industrial Technology Cheonan31056 Korea Republic of Institute of Plasma Technology Korea Institute of Fusion Energy Gunsan54004 Korea Republic of School of Materials Science and Engineering Pusan National University Busan46241 Korea Republic of

Internal stress has emerged as a crucial factor in determining the lifetime of hydrogen permeation barrier coatings, as it influences the hydrogen isotope diffusion and crack propagation. Here, we fabricated carbon-doped TiZrN coatings under different laser outputs, and investigated the changes in hydrogen permeability due to carbon compound formation and internal stress induced by laser shock peening. Based on ToF-SIMS, the carbon penetration depth in the coating was confirmed to be up to 500 nm, depending on the laser output. Using XPS and raman analysis, it was confirmed that doped carbon substituted nitrogen sites in TiZrN, forming TiC and ZrC, and increasing carbide content from 4.1 % to 7.4 %. Notably, as the laser output increased from 30 % to 40 %, the sp2/sp3 ratio rose from 1.33 to 2.67, and the Id/IG ratio increased from 0.81 to 1.33, indicating the formation of an amorphous carbon-embedded (Ti, Zr)(C, N) structure. This was complemented by the transformation of the TEM-SAEd pattern from dot patterns to ring patterns. The internal stress in carbon-doped TiZrN coatings increased from 4.323 GPa before carburization to a maximum of 5.620 GPa. The increase in residual compressive stress led to a reduction in hydrogen permeability by up to 69 %, 57 %, and 24 % at 573 K, 673 K, and 773 K, respectively. This study advances the understanding of carbon compound formation and internal stress changes in TiZrN coatings under different laser output. It demonstrates that the formation of residual compressive stress due to laser shock peening significantly influences the hydrogen permeability by inhibiting hydrogen isotope diffusion and crack propagation within the coating. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Laser ablation

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Hydrate reformation Characteristics in Offshore Natural Gas Hydrate reservoir Using the Horizontal Well depressurization Production

Hydrate Reformation Characteristics in Offshore Natural Gas ...

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Offshore technology Conference, OTC 2025

作者： Zhang, Jianbo Liu, Xiaoao Luo, Jiazheng Sun, Xiaohui Zhong, Jie Wang, Zhiyuan Huang, Weian Sun, Baojiang Wang, Xiao School of Petroleum Engineering China University of Petroleum East China Shandong Qingdao China Shandong Key Laboratory of Offshore Oil & Gas and Hydrates Development Shandong Qingdao China CNPC Engineering Technology R&D Company Limited Beijing China No.7 Oil Production Plant PetroChina Changqing Oilfield Company Shanxi Xian China College of Computer Science and Technology China University of Petroleum East China Qingdao China School of Materials Science and Engineering China University of Petroleum East China Qingdao China

ISBN: (纸本)9781959025610

during depressurization production of natural gas hydrate, the reformation of hydrate is likely to occur in the reservoir, hindering the efficient development of hydrate. Previous studies on the reformation of hydrate in the process of natural gas hydrate production were mainly focused on experimental research and numerical simulation under experimental conditions. In this work, a multi-field coupling flow model considering the effect of hydrate reformation during depressurization production of hydrate reservoir was established, and the accuracy of the model was verified by the field measured data. Meanwhile, the reformation characteristics of hydrate in the reservoir using the horizontal well depressurization production were simulated and investigated. The results show that the reformation of hydrate in the reservoir mainly occurs in the upper part and middle boundary of the hydrate decomposition zone during the depressurization production. Moreover, the smaller the pressure drop extent, absolute permeability and initial hydrate saturation, and the deeper the horizontal well, the larger the hydrate secondary formation zone in the reservoir, the faster the rate of hydrate reformation, and the greater the hydrate saturation caused by hydrate reformation would be, which would make the risk of flow blockage by reformed hydrate in the reservoir rise. The results of this study can provide theoretical support for the safe and efficient development of offshore natural gas hydrate. © 2025, Offshore technology Conference.

关键词： Offshore gas well production

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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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