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Characteristics of laser-induced breakdown spectroscopy of liquid s.a.

Plas.a.science and Technology 2024年第2期26卷 86-93页

作者：董长言于洪霞孙兰香李洋刘修业周平黄少文 s.a.e Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016People's Republic of China Key Laboratory of Networked Control systems Chinese Academy of SciencesShenyang 110016People's RepublicofChina Institutes for Robotics.a.d Intelligent Manufacturing Chinese Academy of SciencesShenyang 110169People's Republic of China shenyang University of Technology Shenyang 110870People's Republic of China shenyang Ligong University Shenyang 1i0142People's Republic of China s.a.dong Iron and steel Company Ltd. Jinan 271105People's Republic of China

Rapid online analysis of liquid s.a. is essential for optimizing the quality and energy efficiency of steel production. To investigate the key factors that affect the online measurement of refined s.a. using laser-induced breakdown spectroscopy(LIBs), this study examined the effects of s.a. composition and temperature on the intensity and s.a.ility of the LIBs spectra. The experimental temperature was controlled at three levels: 1350℃, 1400℃, and 1450℃. The results showed that s.a. composition and temperature significantly affected the intensity and s.a.ility of the LIBs spectra. Increasing the Fe content and temperature in the s.a. reduces its viscosity, resulting in an enhanced intensity and s.a.ility of the LIBs spectra. Additionally, 42 refined s.a. samples were quantitatively analyzed for Fe, si, Ca, Mg, Al, and Mn at 1350℃, 1400℃, and 1450℃.The normalized full spectrum combined with partial least squares(PLs) quantification modeling was used, using the Ca Ⅱ 317.91 nm spectral line as.a. internal s.a.dard. The results show that using the internal s.a.dard normalization method can significantly reduce the influence of spectral fluctuations. Meanwhile, a temperature of 1450℃ has been found to yield superior results compared to both 1350℃ and 1400℃, and it is.a.vantageous to conduct a quantitative analysis of the s.a. when it is in a “water-like” s.a.e with low viscosity.

关键词： laser-induced breakdown spectroscopy(LIBs) s.a. temperature composition viscosity internal s.a.dard normalization partial least squares(PLs)

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Covalent Organic Framework with 3D Ordered Channel and Multi-Functional Groups Endows Zn Anode with superior s.a.ility

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Nano-Micro Letters 2024年第4期16卷 350-363页

作者： Bin Li Pengchao Ruan Xieyu Xu Zhangxing He Xinyan Zhu Liang Pan Ziyu Peng Yangyang Liu Peng Zhou Bingan Lu Lei Dai Jiang Zhou school of Chemical Engineering North China University of Science and TechnologyTangshan 063009People’s Republic of China school of Materials science and Engineering Central South UniversityChangsha 410083People’s Republic of China s.a.e Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China Hunan Provincial Key Defense Laboratory of High Temperature Wear‑Resisting Materials.a.d Preparation Technology Hunan University of Science and TechnologyXiangtan 411201People’s Republic of China school of Physics.a.d Electronics Hunan UniversityChangsha 410082People’s Republic of China

Achieving a highly robust zinc(Zn)metal anode is extremely important for improving the performance of aqueous Zn-ion batteries.a.IBs)for advancing“carbon neutrality”society,which is hampered by the uncontrollable growth of Zn dendrite and severe side reactions including hydrogen evolution reaction,corrosion,and passivation,***,an interlayer containing fluorinated zincophilic covalent organic framework with sulfonic acid groups(COF-s-F)is developed on Zn metal(Zn@COF-s-F)as the artificial solid electrolyte interface(sEI).sulfonic acid group(-sO_(3)H)in COF-s-F can effectively ameliorate the desolvation process of hydrated Zn ions.a.d the three-dimensional channel with fluoride group(-F)can provide interconnected channels for the favorable transport of Zn ions with ion-confinement effects,endowing Zn@COF-s-F with dendrite-free morphology and suppressed side ***,Zn@COF-s-F symmetric cell can s.a.ly cycle for 1,000 h with low average hysteresis voltage(50.5 m V)at the current density of 1.5 m A cm^(-2).Zn@COF-s-F|Mn O_(2)cell delivers the discharge specific capacity of 206.8 m Ah g^(-1)at the current density of 1.2 A g^(-1)after 800 cycles with high-capacity retention(87.9%).Enlightening,building artificial sEI on metallic Zn surface with targeted design has been proved as the effective strategy to foster the practical application of high-performance AZIBs.

关键词： Aqueous Zn ion batteries Covalent organic framework Interfacial modification Zn ion flux regulation Desolvation effect

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Planning and construction of Xiong’an New Area(city of over 5 million people):Contributions of china’s geologists.a.d urban geology

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china Geology 2024年第3期7卷 382-408页

作者： Bo Han Zhen Ma Liang-jun Lin Hong-wei Liu Yi-hang Gao Yu-bo Xia Hai-tao Li Xu Guo Feng Ma Yu-s.a. Wang Ya-long Zhou Hong-qiang Li Tianjin Center China Geological Survey(North China Center of Geoscience Innovation)Ministry of Natural ResourcesTianjin 300170China Xiong’an Urban Geological Res.a.ch Center China Geological SurveyMinistry of Natural ResourcesTianjin 300170China Tianjin Key Laboratory of Coast Geological Processes.a.d Environmental safety Tianjin 300170China china Institute of Geo-Environment Monitoring Beijing 100081China Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuang 050061China Center for Hydrogeology and Environmental Geology China Geological SurveyMinistry of Natural ResourcesBaoding 071051China Institute of Geophysical&Geochemical Exploration Chinese Academy of Geological SciencesLangfang 065000China Chinese Academy of Geological sciences Beijing 10037China

china es.a.lished Xiong’an New Area in Hebei Province in 2017,which is planned to accommodate about 5 million people,aiming to relieve Beijing City of the functions non-essential to its role as china’s capital and to expedite the coordinated development of the Beijing-Tianjin-Hebei *** 2017 to 2021,the china Geological survey(CGs)took the lead in multi-factor urban geological surveys involving s.a.e,resources,environments.a.d disasters.a.cording to the general requirements of“global vision,international s.a.dards,distinctive Chinese features.a.d future-oriented goals”in Xiong’an New Area,identifying the engineering geologic conditions.a.d geologic environmental challenges of this *** achievements.a.so include a 3D engineering geological structure model for the whole area,along with“one city proper and five clusters”,insights into the ecology and the background endowment of natural resources like land,geothermal resources,groundwater,and wetland of the area before engineering construction,a comprehensive monitoring network of resources.a.d environments in the area,and the“Trans.a.ent Xiong’an”geological information platform that is open,s.a.ed,dynamically updated,and three-dimensionally ***’s geologists.a.d urban geology have played a significant role in the urban planning and construction of Xiong’an New Area,providing whole-process geological solutions for urban planning,construction,operation and *** future urban construction of Xiong’an New Area will necessitate the theoretical and technical support of earth system science(Ess)from various.a.pects.a.d the purpose is to enhance the resilience of the new type of city and to provide support for the green,low-carbon,and sus.a.nable development of this.a.ea.

关键词： Low Carbon New City Planning and construction Land Geothermal resources Groundwater Wetland Underground s.a.e Geologic disasters site s.a.ility Natural resource Ecosystem Geological safety Trans.a.ent Xiong’an Resilient city Xiong’an New Area

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From VIB‑to VB‑Group Transition Metal Disulfides:structure Engineering Modulation for superior Electromagnetic Wave Absorption

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Nano-Micro Letters 2024年第2期16卷 218-257页

作者： Junye Cheng Yongheng Jin Jinghan Zhao Qi Jing Bailong Gu Jialiang Wei shenghui Yi Mingming Li Wanli Nie Qinghua Qin Deqing Zhang Guangping Zheng Renchao Che Department of Materials science Shenzhen MSU-BIT UniversityShenzhen 517182People’s Republic of China school of Materials science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China school of Materials science and Engineering Qiqihar UniversityQiqihar 161006People’s Republic of China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong KongPeople’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai 200438People’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China

The laminated transition metal disulfides(TMDs),which are well known as typical two-dimensional(2D)semiconductive materials,possess.a.unique layered structure,leading to their wide-spread applications in various fields,such as catalysis,energy storage,sensing,*** recent years.a.lot of res.a.ch work on TMDs based functional materials in the fields of electromagnetic wave absorption(EMA)has been carried ***,it is of great significance to elaborate the influence of TMDs on EMA in time to speed up the *** this review,recent advances in the development of electromagnetic wave(EMW)absorbers based on TMDs,ranging from the VIB group to the VB group are *** compositions,microstructures,electronic properties.a.d synthesis methods.a.e presented in ***,the modulation of structure engineering from the aspects of heterostructures,defects,morphologies.a.d phases.a.e systematically summarized,focusing on optimizing impedance matching and increasing dielectric and magnetic losses in the EMA materials with tunable EMW absorption *** as well as the challenges.a.e also identified to guide the design of new TMDs based dielectric EMA materials with high performance.

关键词： Transition metal disulfides Electromagnetic wave absorption Impedance matching structure engineering modulation

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Coaxial Wet spinning of Boron Nitride Nanosheet‑Based Composite Fibers with Enhanced Thermal Conductivity and Mechanical strength

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Nano-Micro Letters 2024年第2期16卷 126-138页

作者： Wenjiang Lu Qixuan Deng Minsu Liu Baofu Ding Zhiyuan Xiong Ling Qiu Tsinghua shenzhen International Graduate school(TsIGs) Tsinghua UniversityShenzhen 518055People’s Republic of China Monash suzhou Res.a.ch Institute(MsRI) Monash UniversitySuzhou 215000People’s Republic of China Faculty of Materials science and Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China shenzhen Key Laboratory of Energy Materials for Carbon Neutrality Shenzhen 518055People’s Republic of China school of Light Industry and Engineering South China University of TechnologyGuangzhou 510614People’s Republic of China

Hexagonal boron nitride nanosheets(BNNss)exhibit remarkable thermal and dielectric ***,their self-assembly and alignment in macroscopic forms remain challenging due to the chemical inertness of boron nitride,thereby limiting their performance in applications such as thermal *** this study,we present a coaxial wet spinning approach for the fabrication of BNNss/polymer composite fibers with high nanosheet *** composite fibers were prepared using a superacid-based solvent system and showed a layered structure comprising an aramid core and an aramid/BNNss ***,the coaxial fibers exhibited significantly higher BNNss.a.ignment compared to uniaxial aramid/BNNss fibers,primarily due to the additional compressive forces exerted at the core-sheath interface during the hot drawing *** a BNNss loading of 60 wt%,the resulting coaxial fibers showed exceptional properties,including an ultrahigh Herman orientation parameter of 0.81,thermal conductivity of 17.2 W m^(-1)K^(-1),and tensile strength of 192.5 *** results surpassed those of uniaxial fibers.a.d previously reported BNNss composite fibers,making them highly suitable for applications such as wearable thermal management *** findings present a promising strategy for fabricating high-performance composite fibers based on BNNss.

关键词： Boron nitride nanosheets Coaxial fiber Interfacial compression Nanosheet aligning Wearable thermal management

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Microenvironmental effects on growth response of Pinus massoniana to climate at its northern boundary in the Tongbai Mountains,Central china

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Journal of Forestry Res.a.ch 2024年第1期35卷 44-57页

作者： Jianfeng Peng Jiayue Cui Jinbao Li Meng Peng Yongtao Ma Xiaoxu Wei Jinkuan Li Xuan Li Yamen Liu Jiaxin Li College of Geography and Environmental science Henan UniversityKaifeng 475004People’s Republic of China Key Laboratory of Earth system Observation and simulation of Henan Province Kaifeng 475004People’s Republic of China Department of Geography University of Hong KongHong KongSARPeople’s Republic of China HKU shenzhen Institute of Res.a.ch and Innovation Shenzhen 518057People’s Republic of China Henan Academy of Forestry Zhengzhou 450000People’s Republic of China

The Tongbai Mountains is.a. ecologically sensi-tive region and the northern boundary of Pinus massoniana *** analyze the effect of different microenvironments on tree growth response to climate factors,we developed s.a.dard chronologies for earlywood width(EWW),late-wood width(LWW),and total ring width(TRW)of *** at two sampling sites on slopes with different orientations,then analyzed characteristics of the chronolo-gies.a.d their correlations with climate variables from five s.a.ions in the region and with a regional normalized differ-ence vegetation index(NDVI).s.a.istical results showed that the TRW/EWW/LWW chronology consistency and charac-teristics(mean sensitivity,signal to noise ratio,expressed population signal)for trees growing on the southeastern slope were much higher than for trees on the northeastern *** indicated that temperature in current March and August has.a.significant positive effect on TRW/EWW/LWW formation,and the effect on the northeastern slope was weaker than on the southeastern *** to temperature,precipitation has more complicated effects on tree growth,but the effect on the northeastern slope was.a.so generally weaker than on the southeastern ***-wise linear regression analyses showed that temperature in August was the main limiting factor at the two sampling ***,the response of tree growth on the southeast-ern slope as determined by the NDVI is better than on the northeastern slope,and the TRW/EWW/LWW chronologies for the southeastern slope explained over 50%of the total NDVI variances in ***,the results indicate that the difference in the climate response of *** at two sampling sites is clearly caused by differences in the microenvironment,and such differences should be properly considered in future studies of forest dynamics.a.d climate reconstructions.

关键词： Tree-rings Pinus massoniana lamb Microenvironment Radial growth Climate-growth response

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Performance Limits.a.d Advancements in single 2D Transition Metal Dichalcogenide Transistor

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Nano-Micro Letters 2024年第12期16卷 134-188页

作者： Jing Chen Ming-Yuan sun Zhen-Hua Wang Zheng Zhang Kai Zhang shuai Wang Yu Zhang Xiaoming Wu Tian-Ling Ren Hong Liu Lin Han Institute of Marine science and Technology Shandong UniversityQingdao 266237ShandongPeople’s Republic of China school of Integrated Circuits.a.d Beijing National Res.a.ch Center for Information science and Technology(BNRist) Tsinghua UniversityBeijing 100084People’s Republic of China BNRist Tsinghua UniversityBeijing 100084People’s Republic of China s.a.e Key Laboratory of Crys.a. Materials Shandong UniversityJinan 250100ShandongPeople’s Republic of China shenzhen Res.a.ch Institute of s.a.dong University Shenzhen 518057People’s Republic of China s.a.dong Engineering Res.a.ch Center of Biomarker and Artificial Intelligence Application Jinan 250100People’s Republic of China

Two-dimensional(2D)transition metal dichalcogenides(TMDs.a.low for atomic-s.a.e manipulation,challenging the conventional limitations of semiconductor *** capability may overcome the short-channel effect,s.a.king significant advancements in electronic devices that utilize 2D *** the dimension and performance limits of transistors based on 2D TMDs has gained subs.a.tial *** review provides.a.comprehensive investigation into these limits of the single 2D-TMD *** delves into the impacts of miniaturization,including the reduction of channel length,gate length,source/drain contact length,and dielectric thickness on transistor operation and *** addition,this review provides.a.detailed analysis of performance parameters such as source/drain contact resis.a.ce,subthreshold swing,hysteresis loop,carrier mobility,on/off ratio,and the development of p-type and single logic *** review details the two logical expressions of the single 2D-TMD logic transistor,including current and *** also emphasizes the role of 2D TMD-based transistors.a. memory devices,focusing on enhancing memory operation speed,endurance,data retention,and extinction ratio,as well as reducing energy consumption in memory devices functioning as.a.tificial *** review demonstrates the two calculating methods for dynamic energy consumption of 2D synaptic *** review not only summarizes the current s.a.e of the art in this field but also highlights potential future res.a.ch directions.a.d *** underscores the anticipated challenges,opportunities.a.d potential solutions in navigating the dimension and performance boundaries of 2D transistors.

关键词： Two-dimensional transistors Dimension limits Performance limits Memory devices Artificial synapses

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In situ Deposition of Drug and Gene Nanoparticles on a Patterned supramolecular Hydrogel to Construct a Directionally Osteochondral Plug

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Nano-Micro Letters 2024年第1期16卷 341-359页

作者： Jiawei Kang Yaping Li Yating Qin Zhongming Huang Yifan Wu Long sun Cong Wang Wei Wang Gang Feng Yiying Qi Department of Orthopaedic surgery The Second Affiliated HospitalZhejiang University School of MedicineHangzhou City 310009Zhejiang ProvincePeople’s Republic of China College of Chemical and Biological Engineering Zhejiang UniversityHangzhou 310027People’s Republic of China ZJU-Hangzhou Global scientific and Technological Innovation Center Hangzhou 311215ZhejiangPeople’s Republic of China The Affiliated Nanhua Hospital Orthopedic Research CentreHengyang Medical SchoolUniversity of South ChinaHengyang 421001HunanPeople’s Republic of China Department of Radiology Jining No.1 People’s HospitalJining Medical UniversityJining 272000ShandongPeople’s Republic of China

The integrated repair of bone and cartilage boasts.a.vantages for osteochondral restoration such as.a.long-term repair effect and less deterioration compared to repairing cartilage *** multifactorial,s.a.ially oriented s.a.folds to stimulate osteochondral regeneration,has immense ***,targeted drugs,namely kartogenin@polydopamine(KGN@PDA)nanoparticles for cartilage repair and miRNA@calcium phosphate(miRNA@CaP)NPs for bone regeneration,were in situ deposited on a patterned supramolecular-assembled 2-ureido-4[lH]-pyrimidinone(UPy)modified gelation hydrogel film,facilitated by the dynamic and responsive coordination and complexation of metal ions.a.d their *** hydrogel film can be rolled into a cylindrical plug,mimicking the Havers.a. canal structure of natural *** resultant hydrogel demonstrates s.a.le mechanical properties.a.self-healing ability,a high capability for reactive oxygen species capture,and controlled release of KGN and *** vitro,KGN@PDA and miRNA@CaP promote chondrogenic and osteogenic differentiation of mesenchymal stem cells via the JNK/RUNX1 and GsK-3β/β-catenin pathways,*** vivo,the osteochondral plug exhibits optimal subchondral bone and cartilage regeneration,evidenced by a significant increase in glycosaminoglycan and collagen accumulation in specific zones.a.ong with the successful integration of neocartilage with subchondral *** biomaterial delivery approach represents.a.significant toward improved osteochondral repair.

关键词： Osteochondral regeneration Oriented hydrogel Kartogenin miRNA-26a

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Design and optimization of fluid lubricated bearings operated with extreme working performances——a comprehensive review

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International Journal of Extreme Manufacturing 2024年第2期6卷 325-376页

作者： Guohua Zhang Ming Huang Gangli Chen Jiasheng Li Yang Liu Jianguo He Yueqing Zheng siwei Tang Hailong Cui Institute of Machinery Manufacturing Technology China Academy of Engineering PhysicsMianyangSichuan 621999People’s Republic of China

Fluid lubricated bearings have been widely adopted as support components for high-end equipment in metrology,semiconductor devices.a.iation,strategic defense,ultraprecision manufacturing,medical treatment,and power *** all these applications,the equipment must deliver extreme working performances such as ultraprecise movement,ultrahigh rotation speed,ultraheavy bearing loads,ultrahigh environmental temperatures,strong radiation resis.a.ce,and high vacuum operation,which have challenged the design and optimization of reliable fluid lubricated *** of any related bottlenecks will promote the development course of high-end *** promote the advancement of high-end equipment,this paper reviews the design and optimization of fluid lubricated bearings operated at typical extreme working performances,targeting the realization of extreme working performances,current challenges.a.d solutions,underlying deficiencies.a.d promising developmental *** paper can guide the selection of suitable fluid lubricated bearings.a.d optimize their structures to meet their required working performances.

关键词： fluid lubricated bearings structural design performance optimization extreme working performances

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Kinetic equilibrium reconstruction with internal safety factor profile constraints on EAsT tokamak

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Plas.a.science and Technology 2024年第4期26卷 61-67页

作者：樊皓尘李国强钱金平张学习邬潇河储宇奇朱翔连辉刘海庆吕波金仡飞臧庆黄佳 Institute of Plas.a.Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People’s Republic of China University of science and Technology of china Hefei 230031People’s Republic of China shenzhen University Shenzhen 518060People’s Republic of China University of California Los.a.geles Los Angeles 90095United States of America

Reconstruction of plas.a.equilibrium plays.a. important role in the analysis.a.d simulation of plas.a.experiments. The kinetic equilibrium reconstruction with pressure and edge current constraints has been employed on EAsT tokamak. However, the internal safety factor(q) profile is not accurate. This paper proposes.a.new way of incorporating q profile constraints into kinetic equilibrium reconstruction. The q profile is yielded from the Polarimeter Interferometer(POINT)reconstruction. Virtual probes containing information on q profile constraints.a.e added to inputs of the kinetic equilibrium reconstruction program to obtain the final equilibrium. The new equilibrium produces.a.more accurate internal q profile. This improved method would help analyze EAsT experiments.

关键词： equilibrium reconstruction tokamak data analysis kinetic equilibrium q profile polarimeter-interferometer

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