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An efficient chemical reduction-induced assembly of Fe_(3)O_(4)@graphene fiber for wire-shaped supercapacitors with ultrahigh volumetric energy density

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Science China(Technological Sciences) 2021年第10期64卷 2246-2254页

作者： XIAO Peng SHI MinJie XU Li TAO FengBo LI Yu ZHU HangTian LIU YuTing LI ZhiMin zhou yunpeng FENG Wei State Grid Jiangsu Electric Power Co.Ltd.Research Institute Nanjing 211103China School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China State Key Laboratory of Advanced Transmission Technology Global Energy Interconnection Research Institute Co.Ltd.Beijing 102211China School of Materials Science and Engineering Tianjin UniversityTianjin 300354China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215213China

Benefiting from high flexibility and weavability,the wire-shaped supercapacitors(SCs)arouse tremendous interests for the applications in wearable/portable *** fiber(GF)is considered as a promising linear electrode for wire-shaped ***,the bottleneck is how to develop the GF-based linear electrode with facile fabrication process while wellmaintaining satisfactory electrochemical ***,a novel Fe_(3)O_(4)@GF composite linear electrode is proposed via a chemical reduction-induced assembly approach,in which the GO and Fe_(3)O_(4) nanoparticles(NPs)realize the efficient selfassembly owing to the electrostatic and van der Waals interactions,as well as the sufficient reduction of GO during the preparation *** resultant fiber-shaped architecture shows boosted charge-transfer kinetics,high flexibility and structural *** Fe_(3)O_(4)@GF linear electrode exhibits excellent electrochemical behaviors including a large volumetric specific capacitance(~250.75 F cm^(−3)),remarkable rate capability and favorable electrochemical kinetics in aqueous electrolyte,superior than previously reported GF-based linear *** real application,a high-performance wire-shaped SC with excellent flexibility and weavability is fabricated based on such Fe_(3)O_(4)@GF linear electrode and gel electrolyte,demonstrating ultrahigh volumetric energy density(18.8 mWh cm^(−3)),power density(4000 mW cm^(−3))and strong durability(~93.5%retention after 10000 cycles).Prospectively,the fabricated wire-shaped SC can maintain reliable electrochemical behaviors in various deformation states,showing its potentials in future portable and wearable devices.

关键词： wire-shaped supercapacitors self-assembly graphene fiber high energy density wearable electronics

An organic free radical generator independent on hydrogen peroxide for chemodynamic and immunotherapy in vivo

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Journal of Materials Science & Technology 2024年第7期174卷 85-94页

作者： Yang Chen yunpeng Song Chaojie Tang Hong Yang Wu Wang Shiping Yang Zhiguo zhou College of Chemistry and Materials Science International Joint Laboratory on Resource Chemistry of Ministry EducationShanghai Frontiers Science Center of Biomimetic CatalysisShanghai Normal UniversityShanghai 200234China Institute of Diagnostic and Interventional Radiology Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233China

It is desirable to develop a free radical generator that is neither dependent on hydrogen peroxide nor external stimuli-triggered to achieve effective tumor ***,the free radical genera-tor MNPs-mCPBA was constructed with Zn_(0.4)Co_(0.6)F_(e2)O_(4)@Zn_(0.4)Mn_(0.6)Fe_(2)O_(4)nanoparticles(MNPs)and 3-chloroperbenzoic acid(mCPBA).We believe that the iron(Ⅱ)on the surface of MNPs-mCPBA maybe represent high reactive activity and promote the generation of a large number of organic free radicals(C_(6)H_(4)ClCOOO)in an acidic tumor microenvironment,which realizes the acid-dependent tumor treat-ment strategy independent on the H_(2)O_(2)level in *** addition,the generated organic free radicals(C_(6)H_(4)ClCOOO)effectively induced immunogenic cell death(ICD)and increased T cell ***-der the synergetic treatment with an anti-PD-L1 antibody(α-PD-L1),a favorable anti-tumor effect was achieved.

关键词： Organic free radicals Immunogenic cell death Immunotherapy Chemodynamic therapy

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滴灌灌水器特征参数对砂土湿润进程的影响

排灌机械工程学报 2024年第5期42卷 508-516页

作者：郝闯闯刘大忠买买提明·买吐松周云鹏匡乃昆陈伟杰刘佩晓开提江·卡斯木李云开石河子大学水利建筑工程学院新疆石河子832003 中国农业大学水利与土木工程学院北京100083 新疆喀什噶尔河流域管理局新疆喀什844000

明确灌水器特征参数和土壤粒径组成对湿润进程的影响是进行滴灌系统设计的基础与前提.提出了使用单位湿润体的灌水强度(AQTV)量化土壤湿润进程,探究了灌水器流量(1,3,6 L/h)、灌水量(5,10,20 L)和覆膜对不同粒径组成砂质土壤(北京大兴D... 详细信息

明确灌水器特征参数和土壤粒径组成对湿润进程的影响是进行滴灌系统设计的基础与前提.提出了使用单位湿润体的灌水强度(AQTV)量化土壤湿润进程,探究了灌水器流量(1,3,6 L/h)、灌水量(5,10,20 L)和覆膜对不同粒径组成砂质土壤(北京大兴DX、内蒙古乌盟WM、新疆伽师JS、内蒙赤峰CF)AQTV的影响.结果表明:不同粒径组成砂壤土的AQTV均随灌水器流量增大呈上升的变化规律,并且与粒径组成中(0.100,0.250]mm的土壤颗粒占比呈显著性负相关关系(P<0.05);随着灌水量增加,4种砂壤土中AQTV均呈逐渐下降趋势.当灌水量为5 L以及10和20 L时,AQTV分别与≤0.002 mm的黏粒以及(0.500,1.000]mm的砂粒组分占比呈显著正相关关系.覆膜滴灌提升了处理DX,WM和CF的AQTV,这可能是由于3种砂壤土大粒径砂粒或黏粒相对较高的原因.此外,随着灌水器间距增加,土壤水分交汇区域与含水量减小,土壤水分在水平和竖直湿润距离减小.

关键词：湿润锋砂壤土水分运移单位湿润体的灌水强度交汇入渗

Review of Matrix Aluminas for Refractory Formulations

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China's Refractories 2015年第1期24卷 57-62页

作者： Andreas BUHR Rainer KOCKEGEY_LORENZ Lanyin ZHANG Bin LONG yunpeng zhou Zhongkai TIAN Almatis GmbH Qingdao Almatis Co. Ltd.

Historically,ground calcined aluminas were the first high-alumina matrix products that were used in refractory formulations, in both shaped and unshaped products. At that time the flow properties of castables were enhanced by the use of silica fume. This was followed later by the development of fully ground reactive aluminas which contributed to the design of the matrix below 63 μm. In addition to aggregate fines,a range of bi-modal and multi-modal reactive aluminas were also developed. These not only gave improved physical properties but also better castable workability. This paper reviews matrix alumina developments over time,from basic ground calcines to complex multi-modal matrix products and their globally standardised manufacture.

关键词： matrix fillers reactive alumina porosity strength global product concept

Effects of Specific Surface Area and Impurities of Reactive Alumina on Properties of Corundum Based Castables

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China's Refractories 2017年第4期26卷 37-43页

作者： ZHANG Ju zhou yunpeng LONG Bin ZHANG Lanyin LIU Jinxue Andreas BUHR JIA Quanli YE Guotian Zhengzhou University Zhengzhou 450001China Qingdao Almatis Co. Ltd.Qingdao 266510China Almatis GmbH Frankfurt 60528Germany

Effects of specific surface area and tiny amount of impurities of reactive alumina on the workability, sinte- ring and high temperature mechanical strength of corun- dum based castables were investigated. The results show that the presence of reactive alumina with high specific surface area leads to accelerating of the hydration of calcium aluminate cement, thus shortening the working time and setting time of the castables, which can be as- cribed that the critical energy barrier for stable nuclei of hydration products of cement can be reduced by the high specific surface area of reactive alumina. The sintering of the corundum based castables can be accelerated by the reactive alumina with high specific surface area and high amount of impurities, however, the reactive alumina with too high specific surface area and impurities can al- so lead to noticeable shrinkage of castables. In addition, high temperature mechanical strength of corundum based castables can be decreased by the higher amount of trace impurities of reactive alumina due to formation of low- melting phase at high temperatures.

关键词： reactive alumina specific surface area impurity corundum based eastables workability sintering

An open dataset of data lineage graphs for data governance research

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Visual Informatics 2024年第1期8卷 1-5页

作者： yunpeng Chen Ying Zhao Xuanjing Li Jiang Zhang Jiang Long Fangfang zhou Central South University ChangshaHunanChina Huawei Cloud Computing Technology Co. Ltd.HangzhouZhejiangChina

Data have become valuable assets for *** governance aims to manage and reuse data assets,facilitating enterprise management and enabling product innovations.A data lineage graph(DLG)is an abstracted collection of data assets and their data lineages in data *** DLGs can provide rich data insights for data ***,the progress of data governance technologies is hindered by the shortage of available open datasets for *** paper introduces an open dataset of DLGs,including the DLG model,the dataset construction process,and applied *** real-world dataset is sourced from Huawei Cloud Computing Technology Company Limited,which contains 18 DLGs with three types of data assets and two types of *** the best of our knowledge,this dataset is the first open dataset of DLGs for data *** dataset can also support the development of other application areas,such as graph analytics and visualization.

关键词： Data asset Data governance Data lineage Graph Open dataset

Cretaceous-Neogene Exhumation of the Daqing Shan,North China Constrained by Apatite Fission Track Thermochronology

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Journal of Earth Science 2024年第1期35卷 99-111页

作者： Junlin zhou Yuhong Li Wei Han yunpeng Zhang Gaochao Chen Qiao Zhang Jianshe Wei Yazhuo Niu Xi'an Center of China Geological Survey Xi an 710054China Northwest China Center for Center Geoscience Innovation Xi'an 710054China

The Daqing Shan(DQS)located in the Yinshan-Yanshan Orogenic Belt plays an important role in the Mesozoic to Cenozoic evolution of the North China ***,the cooling and exhumation history since the Cretaceous is still *** the apatite fission track(AFT)data in both this study and previous works,a three-stage exhumation history from Cretaceous to Neogene of the DQS is proposed.(1)The first stage is composed of the early exhumation during Early Cretaceous driven by the collision between the North China and Siberia cratons(ca.148-132 Ma)and the far-field effect of the subduction of the Pacific Plate(ca.132-114 Ma).(2)Due to the subsidence of the Hetao Basin and the subsequent compensation between the DQS and the Hetao Basin,the DQS experienced the second rapid exhumation from Early Eocene to Early Oligocene(ca.54-29 Ma).(3)Since the Late Miocene(ca.13.5 Ma),the third rapid cooling and exhumation of the DQS occurred due to the far-field effect of the uplift of the Tibetan Plateau and the subduction of the Pacific Plate.

关键词： Daqing Shan Hetao Basin Cretaceous-Neogene apatite geochronology apatite fission track cooling and exhumation

Divergent contributions of spring and autumn photosynthetic phenology to seasonal carbon uptake of subtropical vegetation in China

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Journal of Geographical Sciences 2024年第7期34卷 1280-1296页

作者： PENG Ying LI Peng zhou Xiaolu LUO yunpeng ZHANG Cicheng WANG Longjun LI Tong PENG Changhui School of Geographic Sciences Hunan Normal UniversityChangsha410081China Department for Biogeochemical Integration Max-Planck-Institute for BiogeochemistryJena07745Germany Department of Biology Sciences Institute of Environment SciencesUniversity of Quebec at MontrealC.P.8888Succ.Centre-VilleMontrealH3C 3P8Canada

Phenological changes play a central role in regulating seasonal variation in the ecological processes,exerting significant impacts on hydrologic and nutrient cycles,and ultimately influencing ecosystem functioning such as carbon ***,the potential impact mechanisms of phenological events on seasonal carbon dynamics in subtropical regions are *** knowledge gaps hinder from accurately linking photosynthetic phenology and carbon sequestration *** chlorophyll fluorescence remote sensing and productivity data from 2000 to 2019,we found that an advancement in spring phenology increased spring gross(GPP)and net primary productivity(NPP)in subtropical vegetation of China by 2.1 gC m^(-2)yr^(-1)and 1.4 gC m^(-2)yr^(-1),respectively.A delay in autumn phenology increased the autumnal GPP and NPP by 0.4 gC m^(-2)yr^(-1)and 0.2 gC m^(-2)yr^(-1),***,the contribution of the spring phenology to spring carbon uptake increased significantly during the study period,while this positive contribution showed a nonsignificant trend in *** comparison,the later autumn phenology could significantly contribute to the increase in autumnal carbon uptake;however,this contributing effect was *** analysis indicated that these phenomena have been caused by the increased leaf area and enhanced photosynthesis due to earlier spring and later autumn phenology,*** results demonstrate the diverse impacts of vegetation phenology on the seasonal carbon sequestration ability and it is imperative to consider such asymmetric effects when modeling ecosystem processes parameterized under future climate change.

关键词： subtropics vegetation phenology remote sensing carbon cycle climate change

Relation Between Sintering Reactivity of Matrix and Thermal Shock Resistance of Ultra-low Cement Bonded Corundum-spinel Castables for Fired Purging Plugs

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China's Refractories 2018年第4期27卷 13-20页

作者： ZHANG Ju LONG Bin zhou yunpeng Andreas BUHR WANG Feng CUI Qingyang XIE Guofeng DING Dafei JIA Quanli YE Guotian Henan Key Laboratory of High Temperature Functional Ceramics School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Qingdao Almatis Co. Ltd.Qingdao 266510China Almatis GmbH Frankfurt 60528Germany Luoyang LIRR Refractories Co. Ltd.Luoyang 471000China

Purging plugs installed in the bottom of steel ladles are widely used for the secondary refining of high quality steel *** dynamic service conditions and temperature gradients caused by the cold inert gas blown through the plug during stirring create a strong thermal shock impact on the *** can affect its service life and restrict the safety and efficiency of steel making if the plug fails during *** this work,the influence of the particle size distribution (PSD) and amount of reactive alumina on the sintering behavior of ultra-low cement bonded corundum-spinel based castables was investigated on lab *** relationship between sintering reactivity of matrix and thermal shock resistance of castables was evaluated in *** show that the sintering of castables can be intensified by using finer reactive ***,excessive sintering of the castable through finer reactive alumina is negative for thermal shock *** microstructure characterization reveals that castables with more intense sintering show denser matrix structure,which is less effective in hampering crack propagation and therefore results in decline of their thermal shock resistance.

关键词： reactive alumina corundum-spinel castable sintering reactivity thermal shock resistance