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Improving cycling performance of the NaNiO_(2)cathode in sodium-ion batteries by titanium substitution

Materials Futures 2024年第3期3卷 132-147页

作者： siyu An Leonhard Karger Sören L Dreyer Yang Hu Eduardo Barbosa Ruizhuo Zhang Jing Lin Maximilian Fichtner Aleksandr Kondrakov Jürgen Janek Torsten Brezesinski Battery and Electrochemistry Laboratory(BELLA) Institute of NanotechnologyKarlsruhe Institute of Technology(KIT)Kaiserstr.1276131 KarlsruheGermany Helmholtz Institute Ulm(HIU)Electrochemical Energy Storage Helmholtzstr.1189081 UlmGermany BASF SE Carl-Bosch-Str.3867056 LudwigshafenGermany Institute of Physical Chemistry&Center for Materials Research(ZfM/LaMa) Justus-Liebig-University GiessenHeinrich-Buff-Ring 1735392 GiessenGermany

O3-type layered oxide cathodes,such as NaNi_(0.5)Mn_(0.5)O_(2),have garnered significant attention due to their high theoretical specific capacity while using abundant and low-cost sodium as intercalation *** the lithium analog(LiNiO_(2)),NaNiO_(2)(NNO)exhibits poor electrochemical performance resulting from structural instability and inferior Coulomb *** enhance its cyclability for practical application,NNO was modified by titanium substitution to yield the O3-type NaNi_(0.9)Ti_(0.1.O_(2)(NNTO),which was successfully synthesized for the first time via a solid-state *** mechanism behind its superior performance in comparison to that of similar materials is examined in detail using a variety of characterization *** delivers a specific discharge capacity of∼1.0 mAh g^(−1.and exhibits good reversibility,even in the presence of multiple phase transitions during cycling in a potential window of 2.0−4.2 V ***^(+)/*** behavior can be attributed to the substituent,which helps maintain a larger interslab distance in the Na-deficient phases and to mitigate Jahn–Teller activity by reducing the average oxidation state of ***,volume collapse at high potentials and irreversible lattice oxygen loss are still detrimental to the ***,the performance can be further enhanced through coating and doping *** not only positions NNTO as a promising next-generation cathode material,but also serves as inspiration for future research directions in the field of high-energy-density Na-ion batteries.

关键词： Ni-rich layered oxide cathode material substitution doping electro-chemo-mechanical degradation Na-ion battery

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Convolution-Transformer for Image Feature Extraction

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Computer Modeling in Engineering & Sciences 2024年第10期141卷 87-106页

作者： Lirong Yin Lei Wang siyu Lu Ruiyang Wang Youshuai Yang Bo Yang Shan Liu Ahmed AlSanad Salman A.AlQahtani Zhengtong Yin Xiaolu Li Xiaobing Chen Wenfeng Zheng Department of Geography and Anthropology Louisiana State UniversityBaton RougeLA70803USA School of Automation University of Electronic Science and Technology of ChinaChengdu610054China College of Computer and Information Sciences King Saud UniversityRiyadh11574Saudi Arabia College of Resources and Environmental Engineering Key Laboratory of Karst Georesources and Environment(Guizhou University)Ministry of EducationGuiyang550025China School of Geographical Sciences Southwest UniversityChongqing400715China School of Electrical and Computer Engineering Louisiana State UniversityBaton RougeLA70803USA

This study addresses the limitations of Transformer models in image feature extraction,particularly their lack of inductive bias for visual *** to Convolutional Neural Networks(CNNs),the Transformers are more sensitive to different hyperparameters of optimizers,which leads to a lack of stability and slow *** tackle these challenges,we propose the Convolution-based Efficient Transformer Image Feature Extraction Network(CEFormer)as an enhancement of the Transformer *** model incorporates E-Attention,depthwise separable convolution,and dilated convolution to introduce crucial inductive biases,such as translation invariance,locality,and scale invariance,into the Transformer ***,we implement a lightweight convolution module to process the input images,resulting in faster convergence and improved *** results in an efficient convolution combined Transformer image feature extraction *** results on the ImageNet1. Top-1.dataset demonstrate that the proposed network achieves better accuracy while maintaining high computational *** achieves up to 85.0%accuracy across various model sizes on image classification,outperforming various baseline *** integrated into the Mask Region-ConvolutionalNeuralNetwork(R-CNN)framework as a backbone network,CEFormer outperforms other models and achieves the highest mean Average Precision(mAP)*** research presents a significant advancement in Transformer-based image feature extraction,balancing performance and computational efficiency.

关键词： Transformer E-Attention depth convolution dilated convolution CEFormer

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Chiral resolution of furofuran lignans and their derivatives from the stems of Dendrobium 'Sonia'

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Chinese Journal of Natural Medicines 2024年第10期22卷 937-944页

作者： QIU Kaimei QIU Hao XIE Yanqiao ZHANG siyu ZHANG Qian WANG Zhengtao HAN Zhuzhen YANG Li The MOE Key Laboratory of Standardization of Chinese Medicines The SATCM Key Laboratory of New Resources and Quality Evaluation of Chinese Medicines The Shanghai Key Laboratory for Compound Chinese Medicines Institute of Chinese Materia Medica Shanghai University of Traditional Chinese Medicine

Five new furofuran lignans and their derivatives,（-）-glaberide I 4-O-β-D-glucopyranoside（1.）,（+）-glaberide I 4-O-β-D-glucopyranoside（1.）,（+）-glaberide I 7'-ethoxy-4-O-β-D-glucopyranoside（2a）,（-）-glaberide I 7'-ethoxy-4-O-β-D-glucopyranoside（2b）, and（-）-isoeucommin A（3b）, along with fifteen known analogs were isolated from the stems of Dendrobium 'Sonia'. These compounds were classified into ten pairs of enantiomers or diastereoisomers via chiral resolution, and their structures were determined based on extensive spectroscopic data. Their absolute configurations were determined by hydrolysis, comparison of experimental and calculated electronic circular dichroism（ECD） data, and single-crystal X-ray diffraction analysis. The isolates were evaluated for their ability to inhibit nitric oxide（NO） production in RAW264.7 cells. Among them, syringaresinol（5） exhibited prominent inhibition activity, with an IC50 value of 28.4 ± 3.0 μmol·L-1. and there was a slight difference between 5a, 5b and the racemic mixture 5.

关键词： Anti-inflammatory Chiral resolution Dendrobium 'Sonia' Diastereoisomers Enantiomers Furofuran lignans

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The Epidemiological Characteristics and Spatiotemporal Clustering of Measles—China,2005-2022

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China CDC weekly 2024年第27期6卷 665-669页

作者： Qianqian Liu Jiuhong Li siyu Liu Lin Tang Xiaoqi Wang Aodi Huang Xia Xu Yuexin Xiu Hong Yang Ning Wen Lance Rodewald Fuzhen Wang Zundong Yin National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases National Immunization ProgramChinese Center for Disease Control and PreventionBeijingChina

Introduction:In recent years,the incidence of measles in China has consistently remained below 1.per 1.0,000 population,yet the disease has not been *** study aims to comprehensively analyze the epidemiological characteristics of measles from 2005 to 2022,identify high-risk populations and areas,and propose targeted ***:We utilized data from the China Disease Prevention and Control Information System for our comprehensive *** autocorrelation was employed to examine the spatial clustering of measles,while spatiotemporal scanning analysis was used to detect spatiotemporal clustering to describe measles epidemiology during the study ***:Between 2005 and 2022,732,21. measles cases were reported in ***,the incidence of measles exhibited a downward trend,particularly during the periods of 2008-201. and *** 2022,the incidence rate reached its historical low at 0.039 per 1.0,000 *** predominantly affects young *** 201.,global spatial clustering has diminished,although hotspot areas persist in the western ***-temporal scanning identified a high-incidence cluster from 2005 to 2008,comprising 1. provinces in the western,central,and northern regions of ***,from 201. to 2022,a low-incidence cluster was detected in the southern and central ***:China has made significant progress in measles prevention and *** recent low incidence and absence of substantial spatiotemporal clustering indicate that China is nearing measles ***,there is a continuing need to enhance prevention and control efforts among very young children and in historic incidence hotspots in western ***,improving the diagnosis of vaccine-associated rash illnesses is essential.

关键词： prevention Spatial utilized

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长三角减污降碳政策的协同效应和作用机制研究

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环境科学研究 2024年第2期37卷 256-265页

作者：朱思瑜于冰宁波大学商学院浙江宁波315211 宁波大学长三角生态文明研究中心浙江宁波315211

在“双碳”目标和长三角地区一体化高质量发展的要求下,如何发挥环境政策的协同效应,协同推进减污、降碳和经济高质量发展,对于促进经济社会发展全面绿色转型具有重要意义.以2006-2020年长三角地区41.地级市为研究对象,以大气污染物(包... 详细信息

在“双碳”目标和长三角地区一体化高质量发展的要求下,如何发挥环境政策的协同效应,协同推进减污、降碳和经济高质量发展,对于促进经济社会发展全面绿色转型具有重要意义.以2006-2020年长三角地区41.地级市为研究对象,以大气污染物(包括SO_(2)、NOx、PM和VOCs)排放当量、CO_(2)排放量和经济高质量发展水平为被解释变量,以减污降碳政策力度为核心解释变量,通过固定效应和中介效应模型检验减污降碳政策对大气污染、碳排放和经济高质量发展的协同效应和作用机制.结果表明:①减污降碳政策具有三重协同效应,政策力度每提升1.,平均意义上可降低0.470%的大气污染物排放当量,降低0.292%的CO_(2)排放量,提升0.040%的经济高质量发展水平.②减污降碳政策的协同效应具有地区异质性,在核心城市组能够实现减污、降碳和经济高质量发展的三重协同效应,而在中心城市组仅具有污染减排效应,在外围城市组没有产生显著效应.③减污降碳政策主要通过减少能源消费、促进绿色技术创新实现减污、降碳和经济高质量发展.研究显示,应充分考虑地区差异性,针对各城市组制定相应对策措施,进一步发挥减污降碳政策的协同效应,以全面实现长三角地区减污、降碳和经济高质量协同发展.

关键词：减污降碳经济高质量发展政策协同效应作用机制

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Transcription factor OsWRKY1. induces rice heading at low concentrations but inhibits rice heading at high concentrations

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Journal of Integrative Plant Biology 2024年第7期66卷 1385-1407页

作者： Lirong Zhao Yunwei Liu Yi Zhu Shidie Chen Yang Du Luyao Deng Lei Liu Xia Li Wanqin Chen Zhiyu Xu Yangyang Xiong You Ming siyu Fang Ligang Chen Houping Wang Diqiu Yu CAS Key Laboratory of Tropical Plant Resources and Sustainable Use Xishuangbanna Tropical Botanical GardenThe Chinese Academy of SciencesMengla 666303China College of Life Sciences University of Chinese Academy of SciencesBeijing 101408China State Key Laboratory for Conservation and Utilization of Bio‐resources in Yunnan Yunnan UniversityKunming 650500China School of Life Sciences Yunnan UniversityKunming 650500China Southwest United Graduate School Yunnan UniversityKunming 650092China

The heading date of rice is a crucial agronomic characteristic that influences its adaptability to different regions and its productivity *** the involvement of WRKY transcription factors in various biological processes related to development,the precise mechanisms through which these transcription factors regulate the heading date in rice have not been well *** present study identified OsWRKY1. as a WRKY transcription factor which exhibits a pivotal function in the regulation of the heading date in rice through a comprehensive screening of a clustered regularly interspaced palindromic repeats(CRISPR)-CRISPR-associated nuclease 9 mutant library that specifically targets the WRKY genes in *** heading date of oswrky1. mutant plants and OsWRKY1.-overexpressing plants was delayed compared with that of the wild-type plants under short-day and long-day *** investigation revealed that OsWRKY1. exerts dual effects on transcriptional promotion and suppression through direct and indirect DNA binding,*** normal conditions,OsWRKY1. facilitates flowering by directly inducing the expression of OsMADS1. and *** presence of elevated levels of OsWRKY1. protein promote formation of a ternary protein complex involving OsWRKY1.,Heading date 1.Hd1.,and Days to heading date 8(DTH8),and this complex then suppresses the expression of Ehd1.which leads to a delay in the heading *** investigation revealed that a mild drought condition resulted in a modest increase in OsWRKY1. expression,promoting ***,under severe drought conditions,a significant upregulation of OsWRKY1. led to the suppression of Ehd1.expression,ultimately causing a delay in heading *** findings uncover a previously unacknowledged mechanism through which the transcription factor OsWRKY1. exerts a dual impact on the heading date by directly and indirectly binding to the promoters of target genes.

关键词： heading date OsWRKY1. rice transcription factors

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600 nm粒径聚丁二烯胶乳的制备

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精细石油化工 2024年第1期41卷 19-22页

作者：邱思宇大庆石化公司黑龙江大庆163714

以丁二烯为单体制备了小粒径聚丁二烯(PB)胶乳,并且用丙烯酸丁酯(BA)和甲基丙烯酸(MAA)制备了附聚剂。通过高分子附聚法附聚小粒径PB胶乳制备了600 nm大粒径PB胶乳,考察了附聚剂用量、电解质用量、附聚时间、附聚温度、搅拌速度等因素... 详细信息

以丁二烯为单体制备了小粒径聚丁二烯(PB)胶乳,并且用丙烯酸丁酯(BA)和甲基丙烯酸(MAA)制备了附聚剂。通过高分子附聚法附聚小粒径PB胶乳制备了600 nm大粒径PB胶乳,考察了附聚剂用量、电解质用量、附聚时间、附聚温度、搅拌速度等因素对大粒径PB胶乳的影响。结果表明:小粒径PB胶乳最佳粒径为1.0 nm,附聚剂中MAA适宜用量为20%,电解质用量为0.2%,适宜附聚时间为1.3 h,温度对附聚胶乳粒径的大小影响较小。

关键词：附聚剂附聚小粒径聚丁二烯 600nm聚丁二烯胶乳

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Crystal-phase-controlled PtSn intermetallic nanowires for efficient methanol oxidation

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Science China Chemistry 2024年

作者： siyu Cao Mengfan Li Zihan Guo Li Gong Yangfan Lu Wenhua Zhang Yu Ni Lei Gao Chao Ma Hongwen Huang College of Materials Science and Engineering Changsha University of Science and Technology College of Materials Science and Engineering Hunan University Zhejiang Provincial Engineering Research Center of Oxide Semiconductors for Environmental and Optoelectronic Applications Institute of Wenzhou Zhejiang University State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Department of Chemical Physics University of Science and Technology of China China Power Engineering Consulting Group Co. LTD Shenzhen Research Institute of Hunan University

Developing highly efficient Pt-based methanol oxidation reaction（MOR） catalysts is pivotal for direct methanol fuel cells. Phase engineering of nanomaterials offers a promising strategy to improve their catalytic performance, yet achieving phase modulation in one-dimensional nanowires（NWs） remains a great challenge. Herein, we report a facile and one-pot synthesis approach for the crystal-phase-controlled Pt-Sn intermetallic nanowires（NWs）, realizing the crystal-phases regulation of face-centered cubic Pt3Sn intermetallic NWs（FCC-Pt3Sn INTNWs） and hexagonal close-packed PtSn intermetallic NWs（HCP-PtSn INTNWs） by adjusting the amounts of Sn precursors. Notably, the FCC-Pt3Sn INTNWs exhibit high mass and specific activities of6.4 A mg-1.t and 1..8 m A cm–2, respectively, surpassing its counterparts, the HCP-PtSn INTNWs and commercial Pt/C *** a 1.,000 s durability test, the FCC-Pt3Sn INTNWs still maintain a mass activity of 5.6 A mg-1.t, which is 24.3 times higher than that of commercial Pt/C catalyst. This dramatic enhancement of MOR performance is primarily attributed to the phasecontrolled structure and accelerated removal of CO intermediates（CO*）. Theoretical calculations and CO stripping experiments demonstrate that the FCC-Pt3Sn INTNWs lower the energy barrier for converting CO* into COOH* by reducing CO* binding and enhancing OH adsorption, thus significantly improving the MOR activity, CO tolerance, and stability.

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基于公众参与地理信息系统的乡村旅游区主客依恋空间表征差异研究

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干旱区资源与环境 2024年第6期38卷 191-199页

作者：贾衍菊李思雨山东师范大学商学院济南250358

随着乡村旅游发展的不断深入,乡村旅游区已经成为主客共享的新空间,科学呈现居民和游客乡村地方依恋的空间表征及其差异对促进乡村旅游空间的合理开发和高效管理具有重要意义。文中基于在陕西省袁家村获取的地方依恋基础数据与空间数据... 详细信息

随着乡村旅游发展的不断深入,乡村旅游区已经成为主客共享的新空间,科学呈现居民和游客乡村地方依恋的空间表征及其差异对促进乡村旅游空间的合理开发和高效管理具有重要意义。文中基于在陕西省袁家村获取的地方依恋基础数据与空间数据,采用公众参与地理信息系统(PPGIS)的空间可视化分析方法,研究乡村旅游区主客依恋的空间表征差异。结果显示:1.袁家村主客依恋在一定范围内呈现动态变化并随感知距离的增加而衰减。2)主客依恋强度具有明显的空间分布差异性,热点区域形成了依恋附着的空间主体结构。3)主客依恋空间分布结构与强度之间存在着分异性与重叠性,且具有特定的情境性特征。4)主客依恋强度的空间分布不均衡。文中基于PPGIS的地方依恋整合测量方法为提升人地情感关系的旅游空间开发提供技术支持,也为深入描绘乡村旅游区主客依恋偏好以及空间的有效管理与规划提供案例借鉴。

关键词：乡村旅游区主客依恋地方依恋空间表征公众参与地理信息系统

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大孔径有机/无机复合功能Janus笼的制备及其对油相的pH响应性吸释

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复合材料学报 2024年第1期41卷 307-314页

作者：斯炎石思宇井静云中关村海淀园博士后科研工作站中关村科学城城市大脑股份有限公司分站北京100081 航天科工防御技术研究试验中心北京100854 中国安全生产科学研究院地铁火灾与客流疏运安全北京市重点实验室北京100012

Janus笼独特的内外表面化学性质或组成的非对称性使其可以用作特殊微容器,用于分离富集、传输和受限反应等。在一定程度上,更大的孔径能够加强Janus笼和环境之间的物质传输效率。本文介绍了一种两步制备具有pH响应性的大孔径磁性有机/... 详细信息

Janus笼独特的内外表面化学性质或组成的非对称性使其可以用作特殊微容器,用于分离富集、传输和受限反应等。在一定程度上,更大的孔径能够加强Janus笼和环境之间的物质传输效率。本文介绍了一种两步制备具有pH响应性的大孔径磁性有机/无机复合Janus笼的方法。首先是通过乳液界面硅烷偶联剂的溶胶凝胶和两种表面活性剂在界面微相分离制备支撑性良好、表面孔径可调的磁性无机Janus笼。其内表面修饰上的卤素基团可通过可控自由基聚合接枝上pH响应性聚合物得到聚合物/无机复合功能Janus笼。通过SEM、TEM、FTIR及TGA对复合Janus笼进行表征,其粒径在1.3μm,孔径在40 nm~1.m可调,聚合物的质量占复合笼的41.7wt%。制备的复合Janus笼可以通过改变环境pH值控制其对油相的富集和释放,并可同时通过磁操控实现定向传输,有望用于药物装载和体内靶向释放等领域。

关键词：大孔径复合Janus笼 pH响应性磁操控可控吸释

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