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Compression of Battery X-Ray Tomography Data with Machine Learning

Chinese physics Letters 2024年第9期41卷 153-158页

作者： Zipei Yan Qiyu Wang Xiqian Yu Jizhou Li Michael K.-P.Ng Department of Electronic Engineering The Chinese University of Hong KongHong KongChina Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China Huairou Division Institute of PhysicsChinese Academy of SciencesBeijing 101400China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China CUHK Shenzhen Research Institute Shenzhen 518057China Department of Mathematics Hong Kong Baptist UniversityHong KongChina

With the increasing demand for high-resolution x-ray tomography in battery characterization,the challenges of storing,transmitting,and analyzing substantial imaging data necessitate more efficient *** data compression methods struggle to balance reduction ratio and image quality,often failing to preserve critical details for accurate *** study proposes a machine learning-assisted compression method tailored for battery x-ray imaging *** physics-informed representation learning,our approach significantly reduces file sizes without sacrificing meaningful *** validate the method on typical battery materials and different x-ray imaging techniques,demonstrating its effectiveness in preserving structural and chemical *** results show an up-to-95 compression ratio while maintaining high fidelity in the projection and reconstructed *** proposed framework provides a promising solution for managing large-scale battery x-ray imaging datasets,facilitating significant advancements in battery research and development.

关键词： battery Battery details

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Energy harvesting and movement tracking by polypyrrole functionalized textile for wearable IoT applications

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Journal of Energy Chemistry 2025年第3期102卷 230-242页

作者： Guilherme Ferreira Shubham Das Guilherme Coelho Rafael R.A.Silva Sumita Goswami Rui N.Pereira Luís Pereira Elvira Fortunato Rodrigo Martins Suman Nandy CENIMAT/i3N Department of Materials ScienceNOVA School of Science and TechnologyNOVA University Lisbon(FCT-NOVA)CEMOP/UNINOVACampus de Caparica2829-516 CaparicaPortugal AlmaScience Colab Madan Parque2829-516 CAPARICAPortugal Department of Materials Science and Engineering Federal University of São CarlosSão CarlosSP 13565-905Brazil Department of Physics and i3N-Institute for Nanostructures Nanomodelling and NanofabricationUniversity of AveiroCampus Universitário de Santiago3810-193 AveiroPortugal

Textiles for health and sporting activity monitoring are on the rise with the advent of smart portable *** intention of this work is to design wireless monitoring wearables,based on widely available textiles and low environmental impact production *** we have developed a polymeric ink which is able to functionalize different types of textile fibers(including silver conducting fibers,cotton,and commercial textile)with poly *** fibers were weaved together with a thinner silver conducting fiber and carbon fiber to form a touch-sensitive energy harvesting system that would generate an electric output when mechanical pressure is applied to *** prototypes were manufactured with loom weaving accessories to simulate real textile *** simple touch,the prototypes produced a maximum voltage of 244 V and a maximum power density of 2.29 W m^(-2).The current generated is then transformed into a digital signal,which is further utilized for human motion or gesture *** system comprises a wireless block for the Internet of Things(IoT)applicability that will be eventually extended to future remote health and sports monitoring systems.

关键词： Nanogenerator Gesture monitoring Polypyrrole Wireless monitoring Wearable electronics

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Ultra-high strength yet superplasticity in a hetero-grain-sized nanocrystalline Au nanowire

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Journal of materials science & Technology 2022年第6期101卷 95-106页

作者： Libo Fu Deli Kong Chengpeng Yang Jiao Teng Yan Lu Yizhong Guo Guo Yang Xin Yan Pan Liu Mingwei Chen Ze Zhang Lihua Wang Xiaodong Han Beijing Key Lab of Microstructure and Properties of Advanced Materials Beijing University of TechnologyBeijing 100124China Department of Material Physics and Chemistry University of Science and Technology BeijingBeijing 100083China School of Mechanical Engineering and Automation Beihang UniversityBeijing 100191China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Materials Science and Engineering Johns Hopkins UniversityBaltimoreMD 21218United States School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

Nanocrystalline metals often display a high strength up to the gigapascal level,yet they suffer from poor *** studies have shown that the development of hetero-sized grains can efficiently overcome the strength-ductility trade-off of nanocrystalline ***,whether this strategy can lead to the fabrication of nanocrystalline nanowires exhibiting both high strength and superplasticity is unclear,similar to the atomistic deformation *** this paper,we show that ultra-small nanocrystalline Au nanowires comprising grains in both the Hall–Petch and inverse Hall–Petch grain-size regions can exhibit extremely high uniform elongation(236%)and high strength(2.34 gigapascals)at room *** situ atomic-scale observations revealed that the plastic deformation underwent two *** the first stage,the super-elongation ability originated from the intergrain plasticity of small grains via mechanisms such as grain boundary migration and grain *** intergrain plasticity caused the grains in the heterogeneous-structured nanowires to grow very *** the second stage,the superelongation ability originated from intragrain plasticity accompanied by the diffusion of surface *** results show that the hetero-grain-sized nanocrystalline nanowires,comprising grains with sizes both in the strongest Hall–Petch effect region and the inverse Hall–Petch effect region,were simultaneously ultrastrong and *** displayed neither a strength-ductility trade-off nor plastic instability.

关键词： In situ Mechanical property Metallic nanowires Transmission electron microscopy Plastic deformation

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Tailoring the electrolyte microenvironment of indium catalysts for enhanced formic acid electrosynthesis

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Journal of Energy Chemistry 2025年第06期 54-64页

作者： Zifan Zhu Yuanxiang Zhao Pengfei Sun Yuchen Sun Xintao Ma Yunyun Dong Zhihao Zhang Abdullah N.Alodhayb Xiaodong Yi Wei Shi Zhou Chen College of Materials Xiamen University State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Department of Materials Science and Engineering City University of Hong Kong College of Chemistry and Chemical Engineering Liaocheng University Department of Physics and Astronomy College of Science King Saud University

Electrocatalytic carbon dioxide reduction reaction（CO2RR） to formic acid is considered an economically viable avenue toward carbon ***-based catalysts have garnered considerable attention in CO2RR owing to their elevated hydrogen evolution reaction（HER） overpotential and eco-friendly *** have synthesized In2O3nanofibers rich in oxygen vacancies using the electrospinning *** resultant 500-In2O3exhibited superior performance in converting CO2RR to HCOOH,achieving an impressive formate Faradaic efficiency（FE） of 92.1% at a current density of-600 mA ***,it demonstrated remarkable stability,maintaining its performance over 100 h at a current density of-300 mA cm-2under a neutral *** functio nal theory（DFT） calculations,in conjunction with spectroscopic characterizations,have revealed that a Cl-modified In catalyst exhibits a lowered energy barrier for the formation of*HCOOH,while simultaneously inhibiting the generation of*H,in contrast to its pristine In ***,we successfully engineered a dual-electrode system capable of simultaneously producing formate at both the cathode and the *** a current density of-100 mA cm-2,our system achieves a reduction in energy consumption by 12.5% and a significant enhancement in electrical energy conversion efficiency by 39.9%.

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An orbital strategy for regulating the Jahn-Teller effect

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National science Review 2024年第9期11卷 243-252页

作者： Tongtong Shang Ang Gao Dongdong Xiao Qinghua Zhang Xiaohui Rong Zhexin Tang Weiguang Lin Ting Lin Fanqi Meng Xinyan Li Yuren Wen Xuefeng Wang Dong Su Zhen Chen Yong-Sheng Hu Hong Li Qian Yu Ze Zhang Lijun Wu Lin Gu Jian-Min Zuo Yimei Zhu Liquan Chen Ce-Wen Nan State Key Laboratory of New Ceramics and Fine Processing National Center for Electron Microscopy in Beijing School of Materials Science and Engineering Tsinghua University Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Songshan Lake Materials Laboratory School of Materials Science and Engineering University of Science and Technology Beijing Department of Materials Science and Engineering Center of Electron Microscopy and State Key Laboratory of Silicon Materials Zhejiang University Condensed Matter Physics and Materials Science Division Brookhaven National Laboratory Department of Materials Science and Engineering University of Illinois at Urbana Champaign

The Jahn-Teller effect（JTE） arising from lattice-electron coupling is a fascinating phenomenon that profoundly affects important physical properties in a number of transition-metal *** JT distortions and their corresponding electronic structures is highly desirable to tailor the functionalities of ***,we propose a local coordinate strategy to regulate the JTE through quantifying occupancy in the dz2and dx2-y2orbitals of Mn and scrutinizing the symmetries of the ligand oxygen atoms in MnO6octahedra in LiMn2O4and *** effectiveness of such a strategy has been demonstrated by constructing P2-type NaLixMn1-xO2oxides with different Li/Mn ordering *** addition,this strategy is also tenable for most 3d transition-metal compounds in spinel and perovskite frameworks,indicating the univers ality of local coordinate strategy and the tunability of the lattice-orbital coupling in transition-metal *** work demonstrates a useful strategy to regulate JT distortion and provides useful guidelines for future design of functional materials with specific physical properties.

关键词： quantitative convergent-beam electron diffraction Jahn–Teller effect transition-metal oxide local coordinate strategy orbital degenerate

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Polarization-directed nanophotonic routers based on twodimensional inorganic molecular crystals

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InfoMat 2024年第8期6卷 111-118页

作者： Jiacheng Yao Xin Feng Tingting Zhang Fangqi Chen Zhenglong Zhang Hairong Zheng Tianyou Zhai Tao Ding Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education School of Physics and TechnologyWuhan UniversityWuhanthe People's Republic of China State Key Laboratory of Materials Processing and Die&Mould Technology and School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanthe People's Republic of China Department of Mechanical Engineering The University of Texas at DallasRichardsonTexasUSA School of Physics and Information Technology Shaanxi Normal UniversityXi'anthe People's Republic of China

Photonic and plasmonic hybrid nanostructures are the key solution for integratednanophotonic circuits with ultracompact size but relative low loss. However,the poor tunability and modulability of conventional waveguides makesthem cumbersome for optical multiplexing. Here we make use of twodimensionalmolecular crystal, α-Sb_(2)O_(3) as a dielectric waveguide via totalinternal reflection, which shows polarization-sensitive modulation of the propagatingbeams due to its large polarization mode dispersion. Both experimentsand simulations are performed to verify such concept. These Sb_(2)O_(3) nanoflakescan be coupled with plasmonic nanowires to form nanophotonic beam splittersand routers which can be easily modulated by changing the polarization of theincidence. It thus provides a robust, exploitable and tunable platform for onchipnanophotonics.

关键词： nanoflakes plasmonics polarization Sb_(2)O_(3) waveguides

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A self-cleaning window for high-efficiency photodegradation of indoor formaldehyde

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Chinese Chemical Letters 2024年第9期35卷 340-345页

作者： Changzhu Huang Wei Dai Shimao Deng Yixin Tian Xiaolin Liu Jia Lin Hong Chen Department of Physics Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric PowerShanghai University of Electric PowerShanghai 200090China Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution ControlGuangdong Provincial Key Laboratory of Soil and Groundwater Pollution ControlSchool of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Eastern Institute for Advanced Study Eastern Institute of TechnologyNingbo 315200China

Formaldehyde(HCHO)as an indoor air pollutant released by new furniture and decorative materials is of great *** a self-cleaning device to remove HCHO is an ideal way to improve indoor air *** this study,a self-cleaning window with a multilayered structure constructed from fluorinedoped tin oxide/bismuth tungstate/resorcinol-formaldehyde resin(FTO/Bi_(2)WO_(6)/RF)has been fabricated,which is capable of degrading HCHO in natural indoor *** as-fabricated device could utilize the natural room light and promote the generation and transfer of the photocatalytic carriers in Bi_(2)WO_(6),which subsequently delivers a good catalytic oxygen reduction efficiency in RF to produce hydrogen peroxide(H_(2)O_(2)).The as-synthesized H_(2)O_(2)could further split into hydroxyl radicals(•OH),then oxide the HCHO molecules in the *** present study demonstrates a novel and efficient strategy to fabricate a transparent multifunctional window for self-cleaning indoor gaseous pollutants,the concept is of great importance to be expanded in a broad range of indoor furniture for in-house air pollution control.

关键词： Bismuth tungstate Resorcinol-formaldehyde Photocatalysis Hydrogen peroxide HCHO degradation

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Enhanced thermal isolation in porous thermal barrier coatings by the formation of pore guided thermal-shock cracks

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science China(Technological sciences) 2023年第4期66卷 1007-1017页

作者： ZHEN Yu WU KaiJin LIU MengQi ZHENG SongLin HE LingHui YU Yin NI Yong CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsCAS Center for Excellence in Complex System MechanicsUniversity of Science and Technology of ChinaHefei 230026China National Key Laboratory of Shock Wave and Detonation Physics China Academy of Engineering PhysicsInstitute of Fluid PhysicsMianyang 621900China

Pore structure design is an effective strategy to tailor the thermal isolation capability of thermal barrier coatings(TBCs).Pursuing optimal porosity is crucial to balance the requirements of thermal isolation and mechanical reliability since the pore structure shields thermal heat transfer but increases mechanical *** this work,we investigate how thermal heat transfer couples with fracture propagation in porous TBCs by the using thermo-mechanical coupling phase field model for *** simulated results show that cracks induced by thermal shock favor deflection that is sometimes perpendicular to the direction of heat *** thermal conductivity degradation by the transverse cracks significantly impedes thermal heat transfer,leads to enhanced reduction of the effective thermal conductivity of TBCs,decreases the average thermal stress of the substrate,and thus decreases the risk of the crack penetrating into the *** numerical results demonstrate that the phase field method fully considering the thermo-mechanical interaction between cracks and pores can be a useful tool to improve the thermal isolation of porous TBCs under extreme thermal shock loadings through pore structure design.

关键词： phasefield TBCs porosity thermal shock cracks

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Characterizing the nonequilibrium response of FeRh thin films using time-domain thermoreflectance

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Physical Review B 2024年第9期110卷 094417页

作者： Renee M. Harton Alejandro Ceballos-Sanchez Vivek Unikandanunni Alexander X. Gray Stefano Bonetti Peter Krüger Frances Hellman Department of Materials Science and Engineering 1304 W Green St. Urbana Illinois 61801 USA Materials Science and Engineering Berkeley California 94720 USA Department of Physics Department of Molecular Sciences and Nanosystems Materials Science Department Graduate School of Engineering

Time-domain thermoreflectance (TDTR) characterization of FeRh throughout its first-order antiferromagnetic (AF) to ferromagnetic (FM) transition shows that the transient reflectance ΔR(t)/R strongly depends on the magnetic order of the sample. Using TDTR, which uses optical pulses to induce small temperature excursions, we have found that ΔR(t)/R of the AF phase exhibits a large negative response, while the response of the FM phase is positive. This magnetic phase sensitivity has allowed us to study the transient response of both the AF and FM phases to the pump-pulse excitation and the mixed phase of the material. These results are significant since the ultrafast properties of antiferromagnetic materials and mixed antiferromagnetic and ferromagnetic materials are difficult to detect using other conventional techniques. We have found that the AF phase exhibits a strong subpicosecond decaying signal not observed in the FM phase. The magnetic phase dependence of the sign of ΔR(t)/R is qualitatively explained using the results of ab initio density functional theory calculations. Using the two-temperature model, we found that the change in the thermalization time across the transition is caused by differences in both the electronic heat capacity and the electron-phonon coupling factor of the AF and FM phases. The electron-phonon coupling constant in the AF phase is also determined using the two-temperature model conducted using the ntmpy code package. For the FM phase, we provide boundaries for the magnitude of the electron-phonon coupling factor for the FM phase. These results indicate that TDTR can be used to study the transient properties of magnetic materials that are otherwise challenging to probe.

关键词： Ferromagnetism Magnetic order Magnetic phase transitions Antiferromagnets Ferromagnets Magnetic thin films Nonequilibrium systems Density functional theory Pump-probe spectroscopy

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Advancing Precision Agriculture: Machine Learning-Enhanced GPR Analysis for Root-Zone Soil Moisture Assessment in Mega Farms

IEEE Transactions on AgriFood Electronics

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IEEE Transactions on AgriFood Electronics 2025年第1期3卷 98-109页

作者： Namdari, Himan Moradikia, Majid Zekavat, Seyed Askari, Radwin Mangoubi, Oren Petkie, Doug Data Science Program WorcesterMA01609 United States Michigan Technological University Department of Geological and Mining Engineering and Sciences HoughtonMI48105 United States Physics Department WorcesterMA01609 United States

In this article, we investigate an intelligent ground penetrating radar (GPR) that facilitates root-zone soil moisture estimation, a key parameter in precision agriculture. To create an intelligent GPR, we must train machine learning (ML) methods applied to the GPR-received signal. This process requires a large number of labeled GPR data that would be time-consuming and labor-intensive if created via field measurements. This article uses gprMAX software to emulate drone-coupled GPR received signal to generate large-scale data for training ML models. The data are created via a 1.5 GHz Ricker waveform considering a three-layer soil consistent with a realistic soil horizon model. The approach is structured as follows: first, we generate a synthetic dataset using gprMAX. Feature engineering techniques are then employed to extract meaningful components from the GPR signals, followed by a rigorous selection process to identify the most effective ML model for soil moisture prediction. Finally, we validate our model by integrating synthetic data with real GPR data collected at the SoilX lab at Worcester Polytechnic Institute, enhancing prediction accuracy and generalization capability. Our proposed model achieves an overall average root-mean-squared error of 0.5%, and 1.56 cm for moisture and depth estimations, respectively. The proposed intelligent GPR, when installed on a drone, enables high horizontal (e.g., 10 m) and vertical (e.g., 1.5 cm) resolution and high penetration depth (beyond 2 m) megafarm root-zone 3-D moisture map creation. Thus, it offers much higher capabilities when compared to traditional methods, such as synthetic aperture radar and satellite imaging. These results facilitate efficient farming practices, such as optimizing irrigation models, for better crop yields and food security. © 2023 IEEE.

关键词： Soil moisture

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