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SSRN 2023年

作者： Yang, Dongwang Wang, Jiang Xing, Yubing Hu, Kai Lyu, Jianan Li, Junhao Liu, Yutian Xiao, Yani Yan, Yonggao Tang, Xinfeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Nanostructure Research Center Wuhan University of Technology Wuhan430070 China

This study employs finite element simulation methods to meticulously analyze the temperature distribution within swiftly moving car tires to assess energy recovery possibilities. Results show that at 20 °C ambient temperature and a speed of 120 km/h, the maximum tire surface temperature due to friction and rubber deformation hysteresis reaches 91.2 °C. Additionally, a micro thermoelectric generator (micro-TEG) installed on the aluminum alloy wheel hub, functioning as a heat sink, demonstrates an effective temperature difference of 3.9 °C. When subjected to a temperature difference of 20 °C, the micro-TEG module exhibits open circuit voltage and maximum power of 1.47 V/1.41V and 12.06 mW/11.58 mW in the flat and curved states, respectively. To ensure module reliability, rigorous testing is conducted, including 10,000 cycles of bending, barometric shocking, and 20 cycles of temperature variations ranging from 0-100 °C. Remarkably, the module exhibits minimal alterations in internal resistance and open circuit voltage throughout the testing process. Additionally, the module is seamlessly integrated with energy management and Bluetooth signal transmission circuits (total weight: 8.96 g). During simulated car driving, the temperature and pressure signals received by the mobile phone software demonstrate high accuracy, with over 94% consistency compared to the measured results. © 2023, The Authors. All rights reserved.

关键词： Open circuit voltage

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Alamouti code based on block repetition in FBMC/OQAM systems

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Digital Communications and Networks 2022年第1期8卷 58-63页

作者： Dejin Kong Xing Zheng Yukang Tian Tao Jiang Yue Zhang School of Electronic and Electrical Engineering Wuhan Textile UniversityWuhanChina State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhanChina Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhanChina Department of Engineering University of LeicesterLeicesterLEI 7RHUK

In this paper,we address the Alamouti code in Filter-Bank Multicarrier with Offset Quadrature Amplitude Modulation(FBMC/OQAM)and propose a novel block-wise Alamouti code,in which a repeated block is designed to eliminate the imaginary interference among FBMC/OQAM *** proposed approach exhibits a higher spectral efficiency than the conventional block-wise Alamouti scheme,as only one column of zero symbols is used as a guard interval instead of ***,compared to the conventional scheme,the bit error ratio is improved in the proposed block-wise Alamouti,as the assumption on channel invariance at two adjacent sub-carriers is not *** results indicate that,with a significantly reduced overhead,the proposed Alamouti scheme achieves better performance over the conventional block-wise Alamouti scheme.

关键词： Alamouti Filter-bank multicarrier Block repetition Imaginary interference

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Enhanced damping capacity of ferromagnetic Fe-Ga alloys by introducing structural defects

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Journal of materials Science & technology 2021年第25期84卷 173-181页

作者： Ruihua Qiao Junming Gou Tianzi Yang Yiqun Zhang Feng Liu Shanshan Hu Tianyu Ma Frontier Institute of Science and Technology State Key Laboratory for Mechanical Behavior of Materialsand MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed MatterXi’an Jiaotong UniversityXi’an710049China State Key Laboratory of Solidification Processing and Analytical&Testing Center Northwestern Polytechnical UniversityXi'an710072China School of Materials Science and Engineering Zhejiang UniversityHangzhou310027China

The irreversible motion of magnetic domain walls in ferromagnets can dissipate a large portion of the elastic energy,and the associated damping capacity is proportional to the magnetostriction *** contrast,here we found that the damping capacity of the large magnetostriction Fe-Ga alloys can be enhanced by 2-3 times through introducing structural defects including interfacial dislocations and stacking faults,despite that these defects deteriorate the *** structural defects were introduced by aging the BCC(body-centered-cubic)solution-treated precursor,for which the formation of mechanically harder FCT(face-centered-tetragonal)and/or FCC(face-centered-cubic)phases can result in high-density partial dislocations at the semi-coherent phase interfaces and quasi-periodically stacked nano-layer substructure inside the FCC *** structural defects act as extra damping sources besides the magnetic domain walls because the structural accommodation of the semi-coherent phase interfaces between BCC and FCT/FCC nanoprecipitates with different elastic moduli and the nano-layer substructure towards long-range ordered periodical stacking can dissipate a large portion of mechanical *** findings suggest that introducing structural defects provides fresh freedom to design high damping ferromagnetic materials.

关键词： Ferromagnets Damping capacity Defects Magnetostriction Fe-Ga alloy

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Bag-pressed plasticine carbon electrodes for perovskite solar cells and modules

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Solar Energy materials and Solar Cells 2025年 290卷

作者： Liao, Teng Zhu, Aodong Jiang, Yuanzhu Zhao, Wang Cheng, Mengmeng Xiao, Junyan Cheng, Yi-Bing School of Materials Science and Engineering Wuhan University of Technology 122 Luoshi Road Hubei Wuhan China State Key Laboratory of Advanced Technologies for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Hubei Wuhan China Research Centre for Advanced Thin Film Photovoltaics Wuhan University of Technology 122 Luoshi Road Hubei Wuhan China

Carbon-based top electrodes have significant value in enhancing the stability and reducing the cost of perovskite solar cells (PSCs). However, the fabrication process for carbon-based top electrodes in large-area, high-performance perovskite solar modules (PSMs) still lacks practical techniques. In this work, we reference the bag moulding process and use a plasticine-like uncured carbon paste to prepare the top electrode for small-area PSCs and PSMs. Benefiting from the uniform pressure provided by the bag pressing process, this carbon electrode can make sufficiently good electrical contact with the hole transport layer in the large-area device in a single pass. After further removing excess fluid, the device can achieve efficiencies of 18.57 % (∼0.15 cm2) and 14.44 % (∼10 cm2) with good stability. This convenient top electrode preparation method at room temperature offers a novel technological solution for the commercial application of large-area PSMs. © 2025 Elsevier B.V.

关键词： Carbon electrodes

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Microstructure evolution of 7050 aluminum forgings during surface cumulative plastic deformation

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Transactions of Nonferrous Metals Society of China 2025年第1期35卷 45-59页

作者： Jian-liang HU Ze-xiong ZHANG Cheng XING Xiu-jiang WU Shi-quan HUANG Hong BO Key Laboratory of Advanced Forging&Stamping Technology and Science Ministry of EducationYanshan UniversityQinhuangdao 066004China State Key Laboratory of Precision Manufacturing for Extreme Service Performance Central South UniversityChangsha 410083China College of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China Hebei Engineering Technology Research Center of Metal Precision Plastic Processing Yanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China

To elucidate the mechanisms of regulating the microstructure uniformity in 7050 aluminum forgings through surface cumulative plastic deformation(SCPD),the microstructure under different solution treatments was investigated using metallographic observation(OM),electron backscatter diffraction(EBSD),transmission electron microscopy(TEM),and X-ray diffraction(XRD).The findings demonstrate that the most uniform microstructure in the forgings is achieved with a solution treatment at 470℃for 30 *** SCPD process generates a significant number of needle-shaped precipitates,resulting in a higher dislocation density and stored *** treatments alleviate the pinning effect of second-phase particles and facilitate static recrystallization(SRX)in forgings,leading to a reduction in grain ***,mechanical testing results demonstrate 7%−13%increase in tensile strength and more uniform elongation of the forgings in different directions.

关键词： microstructure homogeneity surface cumulative plastic deformation(SCPD) static recrystallization(SRX) dislocation density

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Passivation of PEA^(+) to MAPbI_(3) (110) surface states by first-principles calculations

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Chinese Physics B 2021年第4期30卷 438-443页

作者： Wei Hu Ying Tian Hong-Tao Xue Wen-Sheng Li Fu-Ling Tang School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China Department of Materials Engineering Lanzhou Institute of TechnologyLanzhou 730050China

The MAPbI_(3)(110) surface with low indices of crystal face is a stable and highly compatible photosensitive *** the electronic states on the surface can be detrimental to the photovoltaic efficiency of the device,they should be ***(PEA^(+)),as a molecular ligand,has been widely used in continuous degradation and interfacial charge recombination experiments,and has satisfactory performance in improving surface ***,we construct an adsorption model of MAPbI_(3) with small molecules,calculating the lattice structure and electronic properties of PEA^(+)-adsorbed MAPbI_(3)(110) *** is found that PEA^(+) as apassivator can effectively weaken the electronic states and regulate the band gap of the MAPbI_(3)(110) *** and after adding the passivator,the peak value of electronic state densities at MAPbI_(3)(110) surface is reduced by about 50%,and the band gap is apparently ***,by comparing the Bader atomic charge and spatial charge distributions before and after PEA^(+)’s adsorption on the surface of MAPbI_(3),we observe a substantial change of PEA^(+) charges,which suggests the surface states have been passivated by PEA^(+).

关键词： first-principles calculations surface states passivation

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S-scheme photocatalyst Bi2O3/TiO2 nanofiber with improved photocatalytic performance

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Journal of materials Science & technology 2020年第17期52卷 145-151页

作者： Rongan He Haijuan Liu Huimin Liu Difa Xu Liuyang Zhang Hunan Province Key Laboratory of Applied Environmental Photocatalysis Changsha UniversityChangsha 410022China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

In this study,a hierarchical Bi2O3/TiO2 fibrous composite was in-situ fabricated on an electrospun TiO2 nanofiber at ambient *** the Bi2O3/TiO2 composite,S-scheme electron migration occurred between Bi2O3 and *** the photocatalytic degradation of phenol under simulated sunlight,the asprepared Bi2O3/TiO2 nanofibers considerably outperformed Bi2O3 nanoparticles and TiO2 *** improvement is contributed by maintaining and effectively utilizing the useful carriers and consuming the useless holes and electrons,realized by the S-scheme heterojunction and hierarchical *** study also provides an alternative design fashion for photocatalysts.

关键词： Electrospinning Bismuth Fiber In-situ synthesis

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Tuning on passive interfacial cooling of covalent organic framework hydrogel for enhancing freshwater and electricity generation

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SusMat 2024年第5期4卷 139-153页

作者： Jianfei Wu Ziwei Cui Yuxuan Su Dongfang Wu Jundie Hu Jiafu Qu Jianzhang Li Fangyuan Kang Dan Tian Qichun Zhang Yahui Cai Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjingChina School of Materials Science and Engineering Suzhou University of Science and TechnologySuzhouChina State Key Laboratory of Efficient Production of Forest Resources Beijing Forestry UniversityBeijingChina Department of Materials Science and Engineering Department of ChemistryCenter of Super-Diamond and Advanced Films&Hong Kong Institute of Clean EnergyCity University of Hong KongHong KongChina

Developing an efficient freshwater and electricity co-generation device(FECGD)can solve the shortage of freshwater and ***,the poor salt resistance and refrigeration properties of the materials for FECGD put big challenges in the efficient and stable operation of these *** address these issues,we propose the covalent organic framework(COF)confined co-polymerization strategy to prepare COF-modified acrylamide cationic hydrogels(ACH-COF),where hydrogen bonding interlocking between negatively charged polymer chains and COF pores can form a salt resistant hydrogel for stabilizing tunable passive interfacial cooling(TPIC).The FECPDs based on the TPIC and salt resistance of ACH-COF display a maximum output power density of 2.28 W m-2,which is 4.3 times higher than that of a commercial thermoelec-tric generator under one solar *** production rate of freshwater can reach 2.74 kg m-2 *** results suggest that the high efficiency and scala-bility of the FECGD can hold the promise of alleviating freshwater and power shortages.

关键词： COF confined co-polymerization environmental sensing freshwater and electricity co-generation passive interfacial cooling salt resistance

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AI-driven material discovery for energy, catalysis and sustainability

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National Science Review 2025年第5期 77-78页

作者： Ning Han Bao-Lian Su Department of Electrical and Computer Engineering University of Toronto Laboratory of Inorganic Materials Chemistry(CMI) University of Namur State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Artificial intelligence (AI) is revolutionizing various sectors, including science,technology, industry and daily life [1,2].One key area where AI can make a significant impact is in material design, crucial for advan...

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Analytical and numerical study of chirped optical solitons in a spatially inhomogeneous polynomial law fiber with parity-time symmetry potential

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Communications in Theoretical Physics 2023年第2期75卷 28-38页

作者： Yu Zhong Houria Triki Qin Zhou Research Group of Nonlinear Optical Science and Technology School of Mathematical and Physical SciencesWuhan Textile UniversityWuhan 430200China Radiation Physics Laboratory Department of PhysicsFaculty of SciencesBadji Mokhtar UniversityP.O.Box 1223000 AnnabaAlgeria State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China

This work studies the dynamical transmission of chirped optical solitons in a spatially inhomogeneous nonlinear fiber with cubic-quintic-septic nonlinearity,weak nonlocal nonlinearity,self-frequency shift and parity-time(PT)symmetry potential.A generalized variable-coefficient nonlinear Schr?dinger equation that models the dynamical evolution of solitons has been investigated by the analytical method of similarity transformation and the numerical mixed method of split-step Fourier method and Runge–Kutta *** analytical self-similar bright and kink solitons,as well as their associated frequency chirps,are derived for the first *** found that the amplitude of the bright and kink solitons can be controlled by adjusting the imaginary part of the PT-symmetric ***,the influence of the initial chirp parameter on the soliton pulse widths is quantitatively *** is worth emphasizing that we could control the chirp whether it is linear or nonlinear by adjusting optical fiber *** simulation results of bright and kink solitons fit perfectly with the analytical ones,and the stabilities of these soliton solutions against noises are checked by numerical simulation.

关键词： solitons symmetry inhomogeneous

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