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Spatially confined synthesis of tiNb_(2)O_(7)quantum dots onto mesoporous carbon and ti_(3)C_(2)t_(X)MXene for boosting lithium storage

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Green Energy & Environment 2025年第2期10卷 358-366页

作者： Daoguang Sun Cheng tang Haitao Li Xinlin zhang Guanjia Zhu Zhen-Dong Huang Aijun Du Haijiao zhang Institute of Nanochemistry and Nanobiology School of Environmental and Chemical EngineeringShanghai UniversityShanghai200444China School of Chemistry and Physics and Centre for Materials Science Queensland University of TechnologyBrisbaneQLD4001Australia State Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts and Telecommunications9 Wenyuan RoadNanjing210023China

tiNb_(2)O_(7)has been emerged as one of the most promising electrode materials for high-energy lithium-ion ***,limited by the slow electron/ion transport kinetics,and insufficient active sites in the bulk structure,the tiNb_(2)O_(7)electrode still suffers from unsatisfactory lithium storage ***,we demonstrate a spatially confined strategy toward a novel tiNb_(2)O_(7)-NMC/MXene composite through a triblock copolymer-directed one-pot solvothermal route,where tiNb_(2)O_(7)quantum dots with a particle size of 2-3 nm are evenly embedded into N-doped mesoporous carbon(NMC)and ti_(3)C_(2)t_(X)***,the as-prepared tiNb_(2)O_(7)-NMC/MXene anode exhibits a high reversible capacity(486.2 mAh g^(-1)at 0.1 A g^(-1)after 100 cycles)and long cycle lifespan(363.4 mAh g^(-1)at ss1 A g^(-1)after 500 cycles).Both experimental and theorical results further demonstrate that such a superior lithium storage performance is mainly ascribed to the synergistic effect among 0D tiNb_(2)O_(7)quantum dots,2D ti_(3)C_(2)t_(X)MXene nanosheets,and N-doped mesoporous *** strategy presented also opens up new horizon for space-confined preparation of high-performance electrode materials.

关键词： tiNb_(2)O_(7)quantum dots ti_(3)C_(2)t_(X)MXene Mesoporous carbon Confined synthesis Lithium-ion batteries

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Circadian nutrition:is meal timing an elixir for fatigue?

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Science Bulletin 2025年第3期70卷 309-312页

作者： Zhihui zhang Lu Yan Jonas t.treebak Min-Dian Li Department of Cardiovascular Medicine Center for Circadian Metabolism and Cardiovascular DiseaseSouthwest HospitalArmy Medical UniversityChongqing 400038China Ministry of Education(MOE)Key Laboratory of Geriatric Cardiovascular and Cerebrovascular Disease Chongqing 400038China Novo Nordisk Foundation Center for Basic Metabolic Research Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagen 2200Denmark

Fatigue is increasingly prevalent in industrialized societies,highlighting an urgent need for effective clinical and lifestyle *** manifests as reduced muscle endurance,strength and a persistent sensation of exhaustio... 详细信息

关键词： fatigue strength sensation

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Distributed Mallows Model Averaging for Ridge Regressions

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Acta Mathematica Sinica,English Series 2025年第2期41卷 780-826页

作者： Haili zhang Alan t.K.Wan Kang You Guohua Zou School of Undergraduate Education Shenzhen Polytechnic UniversityShenzhen 518055P.R.China Department of Management Sciences and School of Data Science City University of Hong KongKowloonHong Kong 999077P.R.China School of Mathematical Sciences Capital Normal UniversityBeijing 100048P.R.China

Ridge regression is an effective tool to handle multicollinearity in *** is also an essential type of shrinkage and regularization methods and is widely used in big data and distributed data *** divide and conquer trick,which combines the estimator in each subset with equal weight,is commonly applied in distributed *** overcome multicollinearity and improve estimation accuracy in the presence of distributed data,we propose a Mallows-type model averaging method for ridge regressions,which combines estimators from all *** method is proved to be asymptotically optimal allowing the number of subsets and the dimension of variables to be *** consistency of the resultant weight estimators tending to the theoretically optimal weights is also ***,the asymptotic normality of the model averaging estimator is *** simulation study and real data analysis show that the proposed model averaging method often performs better than commonly used model selection and model averaging methods in distributed data cases.

关键词： Asymptotic normality asymptotic optimality consistency distributed data Mallows model averaging ridge regression

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Ct引导下125I近距离放疗治疗一线化疗失败的转移性软组织肉瘤的可行性和临床价值

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国际医学放射学杂志 2018年第3期 364-364页

作者： Z.Mo t.zhang Y.zhang Z.Xiang H.Yan Z.Zhong 于清扬 State Key Laboratory of Oncology in South China Collaborative Innovation Centre for Cancer Medicine Sun Yat-Sen University Cancer Centre

摘要目的探讨Ct引导下的125I近距离放射治疗对一线化疗失败的转移性软组织肉瘤(StS)治疗的可行性和有效性。方法从2010年1月—2015年7月,共招募93例转移

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Gas-Solid Flow,Combustion Characteristics,and Gas Emissions in a 75 t/h CFB Boiler Based on the CPFD Method

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Journal of thermal Science 2025年第1期34卷 323-336页

作者： HUANG Xiankun BAI zhang ZHU Xiaoli WANG Shuoshuo MU Lin GONG Liang College of New Energy China University of Petroleum(East China)Qingdao 266580China Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education School of Energy and Power EngineeringDalian University of TechnologyDalian 116024China

A 3D simulation using Computational Particle Fluid Dynamics(CPFD)methods was used to calculate coal combustion in a 75 t/h industrial-scale circulating fluidized bed(CFB)*** characteristics,gas-solid flow characteristics,and gaseous pollutant emissions of CFB boilers from combustion ignition to stable operation were systematically evaluated in this *** show that the temperature distribution is relatively uniform throughout the *** the combustion process unfolds within the boiler,the gas composition curve strikingly portrays the inverse correlation between CO_(2)and O_(2)*** the combustion reaction progresses,it becomes evident that the concentration of CO_(2)progressively increases,while the concentration of O_(2)concurrently *** inverse relationship underscores the fundamental combustion reaction,where carbon-based fuels react with oxygen to produce carbon dioxide and release ***,a comprehensive analysis has revealed that,from ignition to stable combustion,both nitric oxide(NO)and sulfur dioxide(SO_(2))emissions exhibit a declining *** reduction in pollutant generation is attributed to the improvement in combustion *** complete combustion leads to lower levels of unburned hydrocarbons,which are prone to NO ***,the sulfur content in the fuel is more efficiently oxidized to sulfur trioxide(SO_(3))or bound in sulfates,reducing SO_(2)*** steady state in the simulation,the SO_(2)mass flow rate varies significantly with the furnace height,gradually increasing from 0.07 kg·s^(-1)at 4 m at the bottom of the furnace to a peak of 0.078 kg·s^(-1)at 8 m in the center,and then decreasing to 0.06 kg·s^(-1)at 20m at the top of the furnace.

关键词： circulating fluidized bed particle flow combustion CPFD modeling

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超声剪切波弹性频散成像对于慢性肝脏疾病的鉴别价值

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国际医学放射学杂志 2023年第1期46卷 109页

作者： X.Q.zhang R.Q.Zheng J.Y.Jin J.F.Wang t.zhang J.Zeng 袁园

摘要二维(2D)剪切波弹性成像(SWE)的黏度相关参数——频散斜率(DS)对于肝脏病变分期的优势尚不明确。目的评估DS作为辅助指标是否能提高对肝脏坏死性炎症、纤

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the Influence of Heterogeneous Processes on the Physicochemical Properties of Atmospheric Aerosols

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Advances in Atmospheric Sciences 2025年第4期42卷 623-640页

作者： Maofa GE Shengrui tONG Lin DU Lingyan WU ting LEI Kun LI Minglan XU Narcisse t.tSONA Wenqian zhang Hailiang zhang State Key Laboratory for Structural Chemistry of Unstable and Stable Species Beijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing 100049China Environment Research Institute Shandong UniversityQingdao 266237China State Key Laboratory of Severe Weather&Key Laboratory of Atmospheric Chemistry of CMA Chinese Academy of Meteorological SciencesBeijing 100081China

With the rapid development of the world economy,complex air pollution has increasingly become a serious threat;for example,with haze events occurring frequently in various regions of the *** evidence has indicated that secondary aerosols play an important role in haze formation,and that heterogeneous processes are among the main forces driving their explosive *** this regard,this paper reviews recent advances in the understanding of the impact of heterogeneous processes on haze chemistry,including the impact on NO_(2)chemistry,marine aerosols,and the hygroscopicity and optical properties of atmospheric *** is distinguished from past reviews on this topic by focusing mainly on new insights from the past five *** summarize the main findings of the impacts of heterogeneous processes on NO_(2)chemistry,marine aerosols,and the physicochemical properties of atmospheric aerosols,and propose several future research directions.

关键词： heterogeneous chemistry atmosphere aerosols physicochemical properties

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高效能多对比梯度回波成像（StAGE）和管壁MR评估的大脑中动脉斑块特征有助于识别颅内动脉粥样硬化病人的下游灌注不良

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国际医学放射学杂志 2021年第2期44卷 239页

作者： t.zhang R.tang S.Liu C.Chai Y.Chen E.M.Haacke 范晓媛

摘要目的对比高效能多对比梯度回波成像(StAGE)与高分辨管壁MRI(hr-vw MRI)对大脑中动脉(MCA)斑块易损性的评估,并探讨斑块特征与下游灌注不良之间的关系。

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基于深度学习方法可减少脑MRI的GBCA剂量

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国际医学放射学杂志 2021年第6期 739页

作者： H.Luo t.zhang N.J.Gong J.tamir S.P.Venkata C.Xu 郭虹

目的评估利用深度学习(DL)来降低脑MRI钆对比剂(GBCA)剂量的临床效能,并进一步明确该方法的便捷性和局限性。方法连续纳入2019年3—8月间83例接受头

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Unveiling solid-solid contact states in all-solid-state lithium batteries:An electrochemical impedance spectroscopy viewpoint

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Journal of Energy Chemistry 2025年第2期101卷 16-22页

作者： Jin-Liang Li Liang Shen Zi-Ning Cheng Jun-Dong zhang Ling-Xuan Li Yu-tong zhang Yan-Bin Gao Chunli Guo Xiang Chen Chen-Zi Zhao Rui zhang Qiang zhang tsinghua Center for Green Chemical Engineering Electrification Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University College of Materials Science and Engineering Taiyuan University of Technology Advanced Research Institute of Multidisciplinary Science School of Materials Science and Engineering Beijing Institute of Technology Beijing Huairou Laboratory Institute for Carbon Neutrality Tsinghua University Shanxi Research Institute for Clean Energy Tsinghua University

All-solid-state lithium batteries（ASSLBs） are strongly considered as the next-generation energy storage devices for their high energy density and intrinsic *** solid-solid contact between lithium metal and solid electrolyte plays a vital role in the performance of working ASSLBs,which is challenging to investigate quantitatively by experimental *** work proposed a quantitative model based on the finite element method for electrochemical impedance spectroscopy simulation of different solid-solid contact states in *** the assistance of an equivalent circuit model and distribution of relaxation times,it is discovered that as the number of voids and the sharpness of cracks increase,the contact resistance Rcgrows and ultimately dominates the battery *** accurate fitting,inverse proportional relations between contact resistance Rcand（1-porosity） as well as crack angle was *** contribution affords a fresh insight into clarifying solid-solid contact states in ASSLBs.

关键词： All-solid-state lithium batteries Distribution of relaxation times Electrochemical impedance spectroscopy Equivalent circuit model Finite element method Solid-solid contacts

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