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RESEARCH ON THE FOCUS OF SIGHTSEEING EXPERIENCE AND EVALUATION IN VR SPACE COMPARED TO REAL-WORLD SPACE

Journal of Environmental engineering (Japan) 2024年第823期89卷 502-513页

作者： Matsuura, Yasuaki Nishina, Daisaku Sugita, So Jiang, Rui Kindaichi, Sayaka Hou, Ning Gao, Weixuan Graduate School of Advanced Science and Eng. Hiroshima University Japan Graduate School of Advanced Science and Eng. Hiroshima University Japan Hiroshima Institute of Technology Japan Graduate School of Advanced Science and Engineering Hiroshima University Japan Graduate School of Advanced Science and Eng. Hiroshima University Japan Graduate School of Advanced Science and Eng. Hiroshima University Japan

In order to examine the effective use of "tourism experience in VR space," we clarify to: What extent VR can substitute for on-site tourism? Whether VR experience stimulates the desire to visit? We created a VR space in which subjects could experience sightseeing as much as possible in the same way as in the on-site. After allowing them to freely tour the area, we asked them to evaluate the content of the experience and the sightseeing spot. Also, we conducted a similar experiment in the actual site to compare the both results. © 2024 Architectural Institute of Japan. All rights reserved.

关键词： Tourism

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Efficient flexible perovskite solar cells and modules using a stable SnO_(2)-nanocrystal isopropanol dispersion

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Nano Research 2024年第4期17卷 2704-2711页

作者： Zhiwei Su Jing Li Ruixuan Jiang Shujie Zhang Chengkai Jin Feng Ye Bingcan Ke Mengjun Zhou Jinhui Tong Hyesung Park Fuzhi Huang Yi-Bing Cheng Tongle Bu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Material Science and Engineering Wuhan University of TechnologyWuhan 430070China Department of Materials Science and Engineering Graduate School of Semiconductor Materials and Devices EngineeringGraduate School of Carbon NeutralityLow Dimensional Carbon Materials CenterUlsan National Institute of Science and TechnologyUlsan 44919Republic of Korea Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528200China

The outstanding advantages of lightweight and flexibility enable flexible perovskite solar cells(PSCs)to have great application potential in mobile energy *** to the low cost,low-temperature processibility,and high electron mobility,SnO_(2) nanocrystals have been widely employed as the electron transport layer in flexible *** prepare high-quality SnO_(2) layers,a monodispersed nanocrystal solution is normally ***,the SnO_(2) nanocrystals can easily aggregate,especially after long periods of ***,we develop a green and cost-effective strategy for the synthesis of high-quality SnO_(2) nanocrystals at low temperatures by introducing small molecules of glycerol,obtaining a stable and well-dispersed SnO_(2)-nanocrystal isopropanol dispersion *** to the enhanced dispersity and super wettability of this alcohol-based SnO_(2)-nanocrystal solution,large-area smooth and dense SnO_(2) films are easily deposited on the plastic conductive ***,this contributes to effective charge transfer and suppressed non-radiative recombination at the interface between the SnO_(2) and perovskite *** a result,a greatly enhanced power conversion efficiency(PCE)of 21.8%from 19.2%is achieved for small-area flexible PSCs.A large-area 5 cm×5 cm flexible perovskite solar mini-module with a champion PCE of 16.5%and good stability is also demonstrated via this glycerol-modified SnO_(2)-nanocrystal isopropanol dispersion approach.

关键词： tin oxide isopropanol dispersion colloid stability flexible perovskite solar cells

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Anisotropy of the magnetic-field-induced phase pocket in the non-Kramers doublet system PrIr2Zn20

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Physical Review B 2024年第8期110卷 L081106-L081106页

作者： Shunichiro Kittaka Takahiro Onimaru Keisuke T. Matsumoto Toshiro Sakakibara Department of Physics Faculty of Science and Engineering Institute for Solid State Physics University of Tokyo Kashiwa Chiba 277-8581 Japan Department of Quantum Matter Graduate School of Advanced Science and Engineering Graduate School of Science and Engineering

We provide thermodynamic evidence for the presence of a magnetic-field-induced small phase pocket near the antiferroquadrupole phase boundary in the non-Kramers Γ3 doublet system PrIr2Zn20. In particular, we measured the specific heat as functions of temperature T, magnetic field B, and field angle ϕB, and found a second specific-heat anomaly in a relatively wide field-angle range near B∥[001], although fine tuning of the field strength is required. We also investigated the rotational magnetocaloric effect and evaluated an entropy change in this phase pocket. The present findings demonstrate that multipole degrees of freedom give rise to a magnetic-field-induced exotic order in PrIr2Zn20, suggesting the possibility of switching between the order parameters or emergence of a multiple-q order of quadrupoles.

关键词： Kondo effect Orbital order Strongly correlated systems Specific heat measurements

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Quantitative Understanding of Solute Concentration Distribution by Microsegregation during Solidification

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Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan 2025年第3期111卷 75-84页

作者： Kawanishi, Sakiko Terashima, Shingo Tsukahara, Yuki Sukenaga, Sohei Esaka, Hisao Shibata, Hiroyuki Department of Energy Science and Technology Graduate School of Energy Science Kyoto University Japan Department of Metallurgy Graduate School of Engineering Tohoku University Japan Institute of Multidisciplinary Research for Advanced Materials Tohoku University Japan Graduate School of Engineering Osaka University Japan

Microsegregation of solute components during the solidification process causes solute pile-up in the liquid phase, which strongly affects the formation behavior of inclusions. However, there is no quantitative evaluation of solute concentration distribution during dendritic growth. In this study, we established an in-situ observation method for quantitative evaluation of solute concentration distribution using model materials with fluorescent reagents to clarify how the solute pile-up progresses due to microsegregation. In addition to evaluating the physical properties of the model materials necessary for this study, a quantitative evaluation of solute concentration distribution during dendritic growth was successfully achieved. Numerical analysis, taking into account the equilibrium partition of solute components and solute diffusion in each phase, reproduced the measured solute concentration distribution in the liquid phase. Thus, the solute concentration distribution was evaluated by the actual measurement and numerical analysis, and it was clarified that a relatively simple model can represent the progress of microsegregation. © 2025 Iron and Steel Institute of Japan. All rights reserved.

关键词： Materials properties

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In-situ Observation of Inclusion Formation Behaviors during Solidification Process Using Model Alloy

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Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan 2025年第3期111卷 85-94页

作者： Kawanishi, Sakiko Tsukahara, Yuki Terashima, Shingo Nakao, Haruto Sukenaga, Sohei Shibata, Hiroyuki Department of Energy Science and Technology Graduate School of Energy Science Kyoto University Japan Department of Metallurgy Graduate School of Engineering Tohoku University Japan Institute of Multidisciplinary Research for Advanced Materials Tohoku University Japan

The formation of secondary inclusions during the solidification process of molten steel is a complex phenomenon triggered by microsegregation. Controlling the dispersion of secondary inclusions in the solidified steel is an important issue that greatly affects the properties of the steel;however, the distribution of inclusions after solidification does not always coincide with the locations of inclusion formation. Therefore, it is still difficult to estimate when, where, and at what supersaturation level inclusions crystallize in the liquid phase, and it is desirable to clarify their formation behavior to control the dispersion of inclusions. In this study, we investigated the formation process of inclusion using a ternary model material of succinonitrile-water-lumogen yellow by in-situ observation, where the formation of oversaturated lumogen yellow can be regarded as the inclusion formation. It was confirmed that the frequency of inclusion formation increased significantly when the solution was held at lower temperatures, i.e., when a large supersaturation ratio was given. The results of the formation frequency indicated that the formation of inclusions occurred in the liquid phase according to the classical nucleation theory. © 2025 The Iron and Steel Institute of Japan.

关键词： Dispersions

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Multi-Scale Time Series Segmentation Network Based on Eddy Current Testing for Detecting Surface Metal Defects

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IEEE/CAA Journal of Automatica Sinica 2025年第3期12卷 528-538页

作者： Xiaorui Li Xiaojuan Ban Haoran Qiao Zhaolin Yuan Hong-Ning Dai Chao Yao Yu Guo Mohammad S.Obaidat George Q.Huang the School of Intelligence Science and Technology University of Science and Technology Beijing the Beijing Advanced Innovation Center for Materials Genome Engineering the Key Laboratory of Intelligent Bionic Unmanned Systems and the Institute of Materials Intelligent Technology Liaoning Academy of Materials IEEE the Department of Computer Science Hong Kong Baptist University the School of Computer and Communication Engineering Key Laboratory of Advanced Materials and Devices for Post-Moore Chips Ministry of Education University of Science and Technology Beijing the Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing the School of Computer and Communication Engineering University of Science and Technology Beijing the King Abdullah Ⅱ School of Information Technology The University of Jordan the Department of Computational Intelligence the School of Computing SRM University the School of Engineering The Amity University The Hong Kong Polytechnic University

In high-risk industrial environments like nuclear power plants, precise defect identification and localization are essential for maintaining production stability and safety. However, the complexity of such a harsh environment leads to significant variations in the shape and size of the defects. To address this challenge, we propose the multivariate time series segmentation network(MSSN), which adopts a multiscale convolutional network with multi-stage and depth-separable convolutions for efficient feature extraction through variable-length templates. To tackle the classification difficulty caused by structural signal variance, MSSN employs logarithmic normalization to adjust instance distributions. Furthermore, it integrates classification with smoothing loss functions to accurately identify defect segments amid similar structural and defect signal subsequences. Our algorithm evaluated on both the Mackey-Glass dataset and industrial dataset achieves over 95% localization and demonstrates the capture capability on the synthetic dataset. In a nuclear plant's heat transfer tube dataset, it captures 90% of defect instances with75% middle localization F1 score.

关键词： Eddy current testing nondestructive testing semantic segmentation time series analysis

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Fe-based high-entropy alloy with excellent mechanical properties enabled by nanosized precipitates and heterogeneous grain distribution

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Journal of Materials science & technology 2024年第14期181卷 71-81页

作者： Heechan Jung Sangwon Lee Taehyeok Kang Alireza Zargaran Pyuck-Pa Choi Seok Su Sohn Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea Department of Materials Science and Engineering Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea Graduate Institute of Ferrous and Energy Materials Technology Pohang University of Science and TechnologyPohang 37673Republic of Korea

High-entropy alloys(HEAs)consisting of CoCrFeNiAlTi systems,with a face-centered cubic(FCC)matrix reinforced by ordered L12 precipitates,have demonstrated exceptional strength-ductility ***,the current compositional design of HEAs heavily relies on high Ni and Co contents,compro-mising the balance between properties and ***,it is crucial to optimize the cost-performance trade-offby fine-tuning the range of Fe,Co,and Ni,while maintaining excellent strength-ductility *** this study,we propose a novel Fe-based HEA with nanosized precipitates and a heteroge-neous grain distribution,achieving a strength-ductility combination comparable to state-of-the-art Ni-or Co-based *** alloy benefits from both precipitation hardening and hetero-deformation-induced strengthening attributed to the heterogeneous grain distribution,resulting in excellent yield strength of 1433 MPa,tensile strength of 1599 MPa,and ductility of 22%.The microstructural evolution and its in-fluence on mechanical properties are unraveled with respect to the observation of precipitate-dislocation interaction and hetero-deformation-induced stress(HDI stress)*** study suggests that the challenge of balancing properties and cost can be addressed through optimized compositional and mi-crostructural design.

关键词： High-entropy alloys Precipitation Heterogeneous microstructure Mechanical property HDI stress

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Bird skeleton-inspired 3D hollow diamond-enhanced PEG composite PCM for photothermal conversion and thermal management

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能源前沿（英文） 2025年第2期19卷 227-239页

作者： Zihao Zhao Xurui Feng Daili Feng Chengming Li Yanhui Feng Junjun Wei School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Energy Conservation and Emission Reduction for Metallurgical Industry University of Science and Technology BeijingBeijing 100083China Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Shunde Graduate School University of Science and Technology BeijingFoshan 528399China

The use of porous skeletons for encapsulating phase change materials(PCMs)is an effective approach to addressing issues such as leakage,low thermal conductivity,and poor photothermal conversion *** by the hollow skeletal structure found in birds in nature,high-quality 3D interconnected hollow diamond foam(HDF)was fabricated using a series of processes,including microwave plasma chemical vapor deposition(CVD),laser perforation,and acid *** HDF was then used as a scaffold to encapsulate *** results demonstrate that HDF significantly reduces the supercooling degree and latent heat discrepancy of *** to pure PEG2000,the thermal conductivity of the HDF/PEG increased by 378％,while its latent heat reached 111.48 J/g,accompanied by a photothermal conversion efficiency of up to 86.68％.The significant performance improvement is mainly attributed to the combination of the excellent properties of the diamond with the inherent advantages of the 3D interconnected structure in HDF,which creates a high-conductivity transport network ***,the HDF/PEG composite extends the temperature cycling time of electronic components by 4 times for heating and 2.3 times for cooling,thereby prolonging the operational lifetime of electronic ***/PEG offers an integrated solution for solar energy collection,photothermal conversion,heat dissipation in electronic components,and thermal energy transfer/*** innovative approach provides innovative ideas for the design and fabrication of composite PCMs and has great application potential,such as solar energy utilization,thermal management,and thermal energy storage.

关键词： phase change materials(PCMs) porous diamond photothermal conversion thermal management

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Precipitation Behavior of MnS Inclusion in Unidirectionally-solidified Fe–18Mn–1Al–0.3C Steels

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Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan 2025年第3期111卷 122-130页

作者： Fan, Yuewen Kameda, Kouki Hu, Xiaojun Matsuura, Hiroyuki State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing China Department of Materials Engineering Graduate School of Engineering The University of Tokyo Japan

In order to reasonably control the precipitation of inclusions during solidification in TWIP steels, the precipitation behavior of typical MnS inclusions in high manganese steel was investigated by unidirectional solidification experiments. Through the combined analyses using ASEM-EDS, optical microscope, and thermodynamic calculation, it was found that Mn concentration in the liquid metal region were higher than those in the solid metal region. Furthermore, closer to the inclusion the liquid phase was, higher its Mn content was. In Fe–18mass%Mn–1Al–0.3C, MnS inclusions can precipitate at the positions located in the junction of dendrites at the end of the solidification (solid fraction fS = 0.96), Mn content reaching 34.88 mass%. Already existing Al2O3 particles could become the core of MnS to form composite inclusions to promote the MnS precipitation during the solidification process. When fS achieved 0.7 leading the Mn segregation in the liquid phase to 25 mass%, MnS starts to precipitate to attach the Al2O3 surface to form composite inclusion. © 2025 The Iron and Steel Institute of Japan.

关键词： Manganese steel

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Electrodeposited CrMnFeCoNi Oxy-carbide film and effect of selective dissolution of Cr on oxygen evolution reaction

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Journal of Materials science & technology 2024年第33期200卷 176-184页

作者： Tian Xiao Chenghua Sun Rongguang Wang Graduate School of Science and Technology Hiroshima Institute of TechnologyHiroshimaJapan Faculty of Science Engineering and TechnologySwinburne University of TechnologyHawthornAustralia Department of Mechanical Systems Engineering Hiroshima Institute of TechnologyHiroshimaJapan

High entropy compounds were proven to exhibit excellent catalytic ***,a series of amorphous CrMnFeCoNi Oxy-carbide films were successfully synthesized by one-step *** demonstrated,the film presented superior electrocatalytic activity for oxygen evolution reaction(OER)with an overpotential of 295 mV at a current density of 10 mA/cm^(2).Uniquely,selective dissolution of Chromium(Cr)was observed,which increased the catalytic activity and showed high stability under a large current density of up to 400 mA/cm^(2).Cr dissolution not only increased the surface area but also improved the conductivity due to newly formed metal-metal bonding,promoting electron transfer and improving OER *** revealed by density functional theory(DFT)calculations,Cr-dissolution mediates the bonding of OER intermediates over surface active sites and ultimately reduces OER *** one-step electrodeposition method and the micro-dissolution mechanism provided a potential way to design and prepare high entropy compound electrodes,aiming to achieve efficient water electrolysis.

关键词： High entropy compound Electrodeposition Selective dissolution Oxygen evolution reaction Density functional theory

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