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Investigation of anisotropy in the collective dynamics and thermal diffusivity in the phenyl pyrimidine liquid crystal

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Physical Review E 2025年第1期111卷 015432-015432页

作者： Meguya Ryu Shu-hei Kurose Koji Yoshida Hiroshi Uchiyama Junko Morikawa National Metrology Institute of Japan (NMIJ) National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba 305-8563 Japan

Liquid crystals (LCs) are unique heat transfer media that exhibit large anisotropy in thermal properties depending on the direction of the director (n) of the LC state. This phenomenon is the basis of thermal conduction in ordered soft materials, and has been extensively studied to understand thermal conduction in soft materials. In this study, we used inelastic x-ray scattering (IXS) to investigate the anisotropic thermal diffusivity and collective dynamics in the terahertz region of a pyrimidine-type LC (PYP8O8). The dispersion relations at several frequencies corresponding to the LC state were analyzed in the directions parallel and perpendicular to n. The results showed that there was a significant difference between the anisotropy of the sound velocity and that of the attenuation coefficient (Γ) estimated from the shape parameter of the IXS spectrum. The results for the linewidth of inelastic excitation show Q2 dependence that is far beyond the viscoelastic relaxation of the system, and the anisotropy in the collective dynamics predicted by Forster et al. [Phys. Rev. Lett. 26, 1016 (1971)] in the hydrodynamic region can be extensively applied to the more localized collective motion of LC systems.

关键词： X ray scattering

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Proteomic analysis of B cells in peripheral lymphatic system reveals the dynamics during the systemic lupus erythematosus progression

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Biophysics Reports 2025年第2期11卷 129-142页

作者： Liming Sun Yuanyuan Yin Yuqing Cao Chunlei Chen Yutong Guo Zeming Cai Jiarui Wu Qingrun Li Key Laboratory of Systems Health Science of Zhejiang Province School of Life Science Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences School of Life Science and Technology ShanghaiTech university CAS Key Laboratory of Systems Biology Shanghai Institute of Biochemistry and Cell Biology Center for Excellence in Molecular Cell Science Chinese Academy of Sciences University of Chinese Academy of Sciences

In this study, we conducted a comprehensive proteomic analysis of B cells from the spleen, mesenteric lymph nodes(mLN), and peripheral blood mononuclear cells(PBMC) in a time-course model of systemic lupus erythematosus(SLE) using female MRL/lpr mice. By combining fluorescence-activated cell sorting(FACS) and 4D-Data-Independent Acquisition(4D-DIA) mass spectrometry, we quantified nearly 8000 proteins, identifying significant temporal and tissue-specific proteomic changes during SLE progression. PBMC-derived B cells exhibited early proteomic alterations by Week 9, while spleen-derived B cells showed similar changes by Week 12. We identified key regulatory proteins, including BAFF, BAFFR, and NFKB2, involved in B cell survival and activation, as well as novel markers such as CD11c and CD117, which have previously been associated with other immune cells. The study high-lights the dynamic reprogramming of B cell proteomes across different tissues, with distinct contributions to SLE pathogenesis, providing valuable insights into the molecular mechanisms underlying B cell dysregulation in lupus. These findings offer potential therapeutic targets and biomarkers for SLE.

关键词： Proteomics B cells Beripheral lymphatic system SLE

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Impeded degradation of perovskite solar cells via the dual interfacial modification of siloxane

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science China Chemistry 2022年第11期65卷 2299-2306页

作者： Xiao Zhang Changsu Cao Yang Bai Cheng Zhu Huachao Zai Sai Ma Yihua Chen Zhenhua Cui Congbo Shi Chenyue Wang Chenxiao Zhou Guizhou Yuan Ziyan Gao Jiawang Hong Jie Dou Hao Wang Huanping Zhou Hai Xiao Jun Li Qi Chen Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China Experimental Center of Advanced Materials School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Department of Chemistry and Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education Tsinghua UniversityBeijing 100084China Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China Shanghai Synchrotron Radiation Facility(SSRF) Zhangjiang LabShanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China

It is challenging to improve the long-term stability of perovskite solar cells(PSCs) without sacrificing efficiency. The perovskite absorbers degrade from the film surface/interfaces, which follows entangled mechanisms that have not been fully revealed ***, we decouple and elaborate two distinctive pathways regarding film degradation based on ***, a dual interfacial modification strategy has been developed for improving the material’s intrinsic stability, thus leading to the film degrading in a more retardant pathway. The corresponding PSCs achieve a stable power output efficiency of 23.75%.More importantly, the unencapsulated PSCs devices retain over 93% of their initial PCE after the maximum power point(MPP)tracking under the continuous 1-sun illumination and show significantly improved stability after aged under the thermal treatment or stored in ambient atmosphere for over 1500 hours without obvious PCE decay. This work shows the importance of modulating the degradation pathway on stability improvement, and at the same time, proposes a strategy for designing perovskite-based optoelectronics with excellent performance and stability.

关键词： perovskite solar cells stability degradation kinetics

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Spatiotemporal Prediction of Harmful Algal Blooms Based on Spatiotemporal Attention and Transformer 3rd

Spatiotemporal Prediction of Harmful Algal Blooms Based on S...

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3rd International Conference on Artificial Intelligence, Robotics, and Communication, ICAIRC 2023

作者： Wang, Peirui Luo, Xiaoqing Zhang, Zhancheng School of Artificial Intelligence and Computer Science Jiangnan University Jiangsu Wuxi214122 China Institute of Advanced Technology Jiangnan University Jiangsu Wuxi214122 China School of Electronic and Information Engineering Suzhou University of Science and Technology Jiangsu Suzhou215000 China

ISBN: (纸本)9789819721993

Accurate HAB prediction is crucial for water pollution management, and the application of spatiotemporal prediction methods in HAB has not been fully explored. To further enhance prediction performance, considering the complex HAB motion patterns, a spatiotemporal prediction method named STA-MIMO based on spatiotemporal attention and transformer is proposed. The proposed spatiotemporal attention module (STA) comprises Temporal Attention Block (TA) and 4D Attention Block (4DA). TA is designed to select critical spatial features along the temporal dimension by assigning temporal attention weights. 4DA is designed to finely select critical spatiotemporal feature points by assigning 4D attention weights. The STA can adaptively highlight key local spatiotemporal features, benefiting the prediction of complex motion patterns. Experiment results on the Taihu HAB 2019 dataset demonstrate that the proposed method significantly outperforms the comparative methods in all metrics, validating its superior HAB prediction performance. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Forecasting

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Navigating the landscape of plant proteomics

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Journal of Integrative Plant Biology 2025年第3期67卷 740-761页

作者： Tian Sang Zhen Zhang Guting Liu Pengcheng Wang Institute of Advanced Biotechnology and School of Medicine Southern University of Science and TechnologyShenzhen 518055China Shanghai Center for Plant Stress Biology CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200032China University of Chinese Academy of Sciences Beijing 101408China

In plants, proteins are fundamental to virtually all biological processes, such as photosynthesis,signal transduction, metabolic regulation, and stress responses. Studying protein distribution,function, modifications, and interactions at the cellular and tissue levels is critical for unraveling the complexities of these biological *** abundance and localization are highly dynamic and vary widely across the proteome, presenting a challenge for global protein quantification and analysis. Mass spectrometry-based proteomics approaches have proven to be powerful tools for addressing this complex issue. In this review,we summarize recent advancements in proteomics research and their applications in plant biology,with an emphasis on the current state and challenges of studying post-translational modifications,single-cell proteomics, and protein-protein interactions. Additionally, we discuss future prospects for plant proteomics, highlighting potential opportunities that proteomics technologies offer in advancing plant biology research.

关键词： mass spectrometry plant biology post-translational modification(PTM) proteomics

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Semitransparent organic solar cells with high light utilization efficiency and color rendering index

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science China Chemistry 2024年第7期67卷 2248-2256页

作者： Ni Gao Haijun Bin Shangrong Wu RenéA.J.Janssen Yongfang Li Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor Materials and DevicesCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow UniversitySuzhou 215123China Molecular Materials and Nanosystems&Institute for Complex Molecular Systems Eindhoven University of TechnologyEindhoven 5600 MBthe Netherlands

Semitransparent organic solar cells(ST-OSCs)have garnered considerable attention as promising renewable energy technology for integrating photovoltaics into ***,there is a trade-off between power conversion efficiency(PCE)and average visible transmittance(AVT),which hinders the achievement of a high light utilization efficiency(LUE).In this study,we propose a valuable method to address this challenge by replacing the transparent top electrode,Ag,with a 20 nm layer of *** ST-OSCs based on the 20 nm Au electrode demonstrate superior exciton extraction,more efficient charge collection,and higher color-rendering index(CRI)due to their smoother surface,higher conductivity,and enhanced visible light transmittance,resulting in a significantly higher PCE of 13.67%and an enhanced AVT of 30.17%,contributing to a high LUE of 4.15%.Additionally,optically transparent dielectric layers,applied on the front and back sides of the ST-OSCs to further boost performance,delivered an impressive LUE of 4.93%,with PCE and AVT values reaching 14.44%and 34.12%,***,the champion ST-OSCs also exhibited a favorable CRI value of *** achievements represent the bestperforming ST-OSCs to date with both high LUE and CRI and hold significant implications for the prospective commercialization of ST-OSCs.

关键词： semitransparent organic solar cells power conversion efficiency average visible transmittance light utilization efficiency color-rendering index

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Realizing the highly reversible Zn^(2+)and Na^(+) dual ions storage in high-crystallinity nickel hexacyanoferrate microcubes for aqueous zinc-ion batteries

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Journal of Materials science & technology 2023年第33期164卷 102-110页

作者： Kexuan Wang Zhu Xu Heng Li Huibo Wang Mingzheng Ge Jilei Liu Shengwen Li Zekun Hu Mengyu Zhu Yanyan Zhang Yuxin Tang Shi Chen Institute of Applied Physics and Materials Engineering University of MacaoMacao SAR 999078China State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology of Clean EnergyHunan Province Key Laboratory for Advanced Carbon Materials and Applied TechnologyHunan UniversityChangsha 410082China College of Chemical Engineering Fuzhou UniversityFuzhou 350116China

Prussian blue analogues(PBAs)with the 3D open framework are regarded as promising cathode candidates for aqueous Zinc ion batteries(ZIBs).Among various PBAs,nickel hexacyanoferrate(NiHCF)has attracted considerable attention because of its high operating voltage and economic ***,the cyclability of NiHCF is unsatisfactory due to poor structural stability during Zn^(2+) ions insertion/***,the ion storage mechanism of NiHCF in aqueous electrolytes has not been fully revealed ***,high-crystallinity NiHCF(HC-NiHCF)microcubes with improved structural stability and larger crystal plane spacing are *** the first time,highly reversible Zn2+ions and Na+ions co-insertion/extraction are achieved for the HC-NiHCF microcubes in mixed aqueous electrolyte,as evidenced by various observations including two separated discharge plateaus and sequential changes of Na 1s and Zn 2p signals in ex-situ X-ray photoelectron spectroscopy(XPS).As a result,a high specific capacity of 73.9 mAh g^(−1) is obtained for the HC-NiHCF microcubes at 0.1 A g−1,combined with enhanced cycle stability(75%vs.16.4%)over 1000 cycles at 2 A g^(−1).The reversible Zn^(2+) ions and Na+ions co-insertion in HC-NiHCF microcubes reveals a new ion storage mechanism of Ni-based PBAs in aqueous electrolytes.

关键词： Aqueous zinc-ion batteries Prussian blue analogues Ion storage mechanism Dual ions storage High crystallinity

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Fast Computation for Solving Three-Dimensional Electromagnetic Wave Scattering

Fast Computation for Solving Three-Dimensional Electromagnet...

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2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio science Meeting, AP-S/URSI 2023

作者： Zhu, Lan Xu, Li Wang, Hao Yin, Junhui Li, Xing Li, Bin University of Electronic Science and Technology of China Chengdu611731 China Shenzhen Institute for Advanced Study Uestc Shenzhen518000 China

ISBN: (纸本)9781665442282

Many applications in electromagnetic engineering require the prediction of the current induced by a large range of incident plane waves. This paper presents an efficient and accurate method for calculating the angular response of electrically large targets. The proposed algorithm consists of three steps: use Fourier harmonics to interpolate the right hand side (RHS) within a given angle range;then reduce the number of independent coefficient vectors in Fourier harmonics by singular value decomposition (SVD);finally, effectively solve the matrix solutions of multiple RHSs with the recently proposed Krylov cycle method GCRO-DR. The numerical results are given and compared with other iterative algorithms to illustrate the effectiveness of the method. © 2023 IEEE.

关键词： Singular value decomposition

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CoS_(2)/N,S co-doped mesoporous carbon with 3D micro-nano crosslinked structure as efficient bifunctional oxygen electrocatalysts for zinc-air batteries

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Chinese Chemical Letters 2023年第5期34卷 604-609页

作者： Wei Wang Liqin Li Jie Ouyang Jialin Gong Jie Tian Liang Chen Junlin Huang Binhong He Zhaohui Hou Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials School of Chemistry and Chemical EngineeringHunan Institute of Science and TechnologyYueyang 414006China Guangxi Key Laboratory of Low Energy Material Guangxi Normal UniversityGuilin 541004China Hubei Key Laboratory of Pollutant Analysis&Reuse Technology Hubei Normal UniversityHuangshi 435002China Hunan Province Key Laboratory of Materials Surface&Interface Science and Technology Material Science and Engineering SchoolCentral South University of Forestry and TechnologyChangsha 410004China

This work describes a bifunctional oxygen catalyst made of cobalt disulfide encapsulated in N,S codoped mesoporous carbon with a novel three-dimensional micro-nano crosslinking *** proposed composite materials exhibit promising oxygen electrocatalytic activity and *** composite assembled rechargeable zinc-air battery can achieve a high power density of 208.9 m W/cm^(2),and can be stably cycled for more than 160 ***,the all-solid zinc-air battery assembled with the electrocatalyst also performs *** micro-nano crosslinking and high porosity structure,as well as the large number of active sites generated by the synergy of N,S doping and the close interface between carbon matrix and CoS_(2),contribute to the composite's exceptional electrochemical *** study's rational strategy lays the path for the development of other high-performance bifunctional electrocatalysts.

关键词： Micro-nano crosslinked CoS_2 ORR OER Zn-air battery

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A Stable Diffusion Based Image Generation Method for Few-Shot Emerging Pest Detection in the Wild 25

A Stable Diffusion Based Image Generation Method for Few-Sho...

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25th IEEE International Conference on Industrial technology, ICIT 2024

作者： Wang, Xiaodong Wang, Rujing Wu, Shilian Ma, Xiao Du, Jianming Gao, Junjie Institute Of Intelligent Machines Hefei Institutes Of Physical Science Chinese Academy Of Sciences Intelligent Agriculture Engineering Laboratory Of Anhui Province Hefei230031 China Graduate School Of University Of Science And Technology Of China Science Island Branch Hefei230026 China University Of Science And Technology Of China Hefei230026 China School Of Computer Science And Engineering Nanjing University Of Science And Technology Nanjing210094 China Shanghai Advanced Research Institute Chinese Academy Of Sciences Shanghai201210 China

ISBN: (纸本)9798350340266

Detecting few-shot emerging pests in the wild presents a significant challenge in the field of agricultural computer vision. However, there has been minimal research focused on generating emerging pest images with different natural scenarios that align with the authentic pest living environments. With the advent of the controllable generative stable diffusion model recent years, we proposed an innovative image generation method based on stable diffusion techniques as well as introducing text prompt and coordinate information into the vanilla model. Both qualitative and quantitative experimental results demonstrate that our proposed approach can generate anthropomorphic images which are both visually recognized by human experts and various image quality assessment performance metrics. © 2024 IEEE.

关键词： Diffusion

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