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Chinese Journal of Chemistry 2019年第4期37卷 352-358页

作者： qing-qing Wang Yang-Ye jiang Cheng-Chu Zeng Bao-Guo Sun Beijing Advanced Innovation Center for Food Nutrition and Human Health School of Food and Chemical EngineeringBeijing Technology and Business UniversityBeijing 100048China Beijing Key Laboratory of Environmental and Viral Oncology College of Life Science & BioengineeringBeijing University of TechnologyBeijing 100124China

An efficient electrochemical access to the non-symmetric biphenols using tri(p-bromophenyl)amine(TBPA)as a redox mediator has been developed.The electrochemical protocol features highly selective cross-coupling produc... 详细信息

关键词： Non-Symmetric Biphenols Mediated Tri(p-bromophenyl)amine Phenols Naphthols

A collaboration strategy in the mining pool for proof-of-neural-architecture consensus

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Blockchain(Research and Applications) 2022年第4期3卷 14-20页

作者： Boyang Li qing Lu Weiwen jiang Taeho Jung Yiyu Shi Department of Computer Science and Engineering University of Notre DameNotre Dame46556INUSA Department of Electrical and Computer Engineering George Mason UniversityFairfax22030VAUSA

In most popular public accessible cryptocurrency systems,the mining pool plays a key role because mining cryptocurrency with the mining pool turns the non-profitable situation into profitable for individual miners.In many recent novel blockchain consensuses,the deep learning training procedure becomes the task for miners to prove their workload.Thus,the computation power of miners will not purely be spent on the hash puzzle.In this way,the hardware and energy will support the blockchain service and deep learning training simultaneously.While the incentive of miners is to earn tokens,individual miners are motivated to join mining pools to become more competitive.In this paper,we are the first to demonstrate a mining pool solution for novel consensuses based on deep learning.The mining pool manager partitions the full searching space into subspaces,and all miners are scheduled to collaborate on the Neural architecture search(NAS)tasks in the assigned subspace.Experiments demonstrate that the performance of this type of mining pool is more competitive than that of an individual miner.Due to the uncertainty of miners'behaviors,the mining pool manager checks the standard deviation of the performance of high reward miners and prepares backup miners to ensure completion of the tasks of high reward miners.

关键词： Blockchain Consensus Deep learning Mining pool Neural architecture search(NAS)

Oxidation behavior of Al0.2CoCrFeNi high-entropy alloy film in supercritical water environment

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Rare Metals 2022年第4期41卷 1217-1222页

作者： Bao-Hong Zhu Hao-Chen Qiu Wei jiang qing-He Yu GRIMAT Engineering Institute Co. LtdBeijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing 100088China

The corrosion resistance of Al0.2CoCrFeNi high-entropy alloy(HEA) film deposited by magnetron sputtering was investigated and compared with that of Al0.2 CoCrFeNi HEA bulk and G115 alloy.The HEA film is composed of face-centered cubic with nanoscale grain size.The HE As(film and bulk) exhibit higher electro-chemical corrosion resistance than the G115 alloy in 3.5 wt% NaCl solution.

关键词： alloy corrosion resistance

Old Master Zhu： in memory of virologist Guan-Fu Zhu

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Protein & Cell 2018年第9期9卷 749-751页

作者： qing Ye Tao jiang Cheng-Feng Qin Department of Virology State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and EpidemiologyBeijing 100071 China

Born in Dinghai County of Zhejiang province in June, 1926, Guan-Fu Zhu began to study at School of Medicine, Tongji University, in October, 1946 （Fig. 1）. Then he moved to the Department of Bacteriology and Immunology of Peking Union Medical College in September, 1954, where he got his master degree under the supervision of Prof. Shao-Wen Xie, a renowned microbiologist and immunologist. In July, 1951, Mr. Zhu served as an assistant in teaching and research section of the Second Military Medical University of PLA. In January, 1958, he began to work at the Institute of Microbi- ology and Epidemiology, Academy of Military Medical Sci- ences, successively serving as a research assistant, assistant professor, associate professor and professor. Due to cardiovascular and cerebrovascular diseases, Mr. Guan- Fu Zhu unfortunately passed away on November 7th, 2015, at the age of 89.

关键词： Virology Committee International Union Of Microbiological Societies (IUMS) Military Medical Press Honorary Chairman Common Viral Diseases

Inhibited shuttle effect by functional separator for room-temperature sodium-sulfur batteries

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Journal of Materials Science & Technology 2022年第18期113卷 207-216页

作者： Chunwei Dong Hongyu Zhou Hui Liu Bo Jin Zi Wen Xingyou Lang Jianchen Li Jaekwang Kim Qing Jiang Key Laboratory of Automobile Materials Ministry of Educationand School of Materials Science and EngineeringJilin UniversityChangchun 130022China Department of Energy Convergence Engineering Cheongju University298 Daeseong-roCheongwon-guCheongjuChungbuk363-764Korea

According to a statistic,approximately 6 trillion cigarettes are smoked each year all over the world,which produces approximately 1.2 million tons of discarded cigarette butts.The discarded cigarette filters are non-biodegradable,thus they produce a mass of waste disposal and cause environmental pollution is-sue.For the purpose of transforming waste into wealth and reducing environmental pollution,nitrogen and sulfur co-doped carbon nanofiber/carbon black(N,S-CNF/CB)composite derived from the discarded cigarette filters is employed to modify glass fiber(GF)separator for the first time in this study.N,S-CNF improves binding ability towards sodium polysulfides(SPSs)by chemisorption.Non-polar CB limits the dissolution of SPSs in the liquid electrolyte by physisorption.The experiment and density functional theory calculation results indicate that a RT-Na/S battery with a N,S-CNF/CB+GF separator exhibits good cycling stability and rate performance.After 100 cycles at a low current rate of 0.1 C,a RT-Na/S battery with a sulfur mass fraction of 71%delivers a discharge capacity of 703 mAh g^(−1).In addition,at a high current rate of 0.5 C,a discharge capacity of 527 mAh g^(−1) is still maintained after 900 cycles with a very low capacity fading rate of 0.035%per cycle.

关键词： Shuttle effect Density functional theory Functional separator Nitrogen and sulfur co-doping Room-temperature sodium-sulfur batteries

Weldability of 1000 MPa Grade Ultra-low Carbon Bainitic Steel

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Journal of Iron and Steel Research(International) 2016年第7期23卷 705-710页

作者： qing-mei jiang Xiao-qiang ZHANG Li-qing CHEN Pipeline Department of China Petroleum Pipeline Engineering Corporation Langfang 065000 Hebei China State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110819 Liaoning China

Maximum hardness test in weld heat-affected zone（HAZ）,oblique Y-groove cracking test and mechanical property test of welding joint of 1 000 MPa grade ultra-low carbon bainitic steel were carried out,so as to research the weldability of the steel.The results show that the steel has lower cold cracking sensitivity,and preheating temperature of 100 ℃ can help completely eliminate cold cracks,generating good process weldability.The increase of preheating temperature can reduce the hardening degree of heat-affected zone.The strength of welding joint decreases and hardness reduces when heat inputs increase,and excellent mechanical properties can be obtained when low welding heat inputs are used.Fine lath bainites of different orientations combined with a few granular bainites that effectively split the original coarse austenite grains are the foundation of good properties.

关键词： ultra-low carbon bainitic steel weldability cold cracking microstructure mechanical property

间充质干细胞移植治疗膝关节软骨损伤及骨关节炎的现况与未来

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中华医学杂志 2024年第17期104卷 1445-1452页

作者：蒋青张雨南京大学医学院附属南京鼓楼医院骨科运动医学与成人重建外科国家骨科与运动康复临床医学研究中心分中心南京210008

关节软骨损伤、骨关节炎(OA)的患病率高,波及人群广。软骨组织自身修复能力差,一旦损伤将不可逆转地发展为OA。间充质干细胞在再生医学领域扮演重要角色,被认为是实现软骨的修复与再生中最具希望的种子细胞之一。本文结合国内外最新临... 详细信息

关节软骨损伤、骨关节炎(OA)的患病率高,波及人群广。软骨组织自身修复能力差,一旦损伤将不可逆转地发展为OA。间充质干细胞在再生医学领域扮演重要角色,被认为是实现软骨的修复与再生中最具希望的种子细胞之一。本文结合国内外最新临床研究成果,对临床中应用间充质干细胞治疗软骨损伤或OA的理论依据,治疗目的、意义,间充质干细胞的来源、特点,临床实施方案及疗效进行论述,同时对间充质干细胞临床应用中面临的问题,以及未来需要攻克的方向进行论述和探讨。

关键词：膝关节关节软骨骨关节炎间充质干细胞

Stretchable and self-healable hydrogel artificial skin

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National Science Review 2022年第7期9卷 43-55页

作者： Bin Xue Hui Sheng Yongqiang Li Lan Li Weishuai Di Zhengyu Xu Linjie Ma Xin Wang Haoting jiang Meng Qin Zhibo Yan Qing Jiang Jun-Ming Liu Wei Wang Yi Cao National Laboratory of Solid State Microstructures Department of Physics Nanjing University State Key Laboratory of Pharmaceutical Biotechnology Department of Sports Medicine and Adult Reconstructive Surgery Drum Tower Hospital Affiliated to Medical School of Nanjing University Institute for Brain Sciences Nanjing University Chemistry and Biomedicine Innovation Center Nanjing University

Hydrogels have emerged as promising materials for the construction of skin-like mechanical sensors.The common design of hydrogel-based artificial skin requires a dielectric sandwiched between two hydrogel layers for capacitive sensing.However,such a planar configuration limits the sensitivity,stretchability and self-healing properties.Here,we report the design of single-layer composite hydrogels with bulk capacitive junctions as mechanical sensors.We engineer dielectric peptide-coated graphene(PCG) to serve as homogenously dispersed electric double layers in hydrogels.Any mechanical motions that alter the microscopic distributions of PCG in the hydrogels can significantly change the overall capacitance.We use peptide self-assembly to render strong yet dynamic interfacial interactions between the hydrogel network and graphene.The resulting hydrogels can be stretched up to 77 times their original length and self-heal in a few minutes.The devices can effectively sense strain and pressure in both air and aqueous environments,providing tremendous opportunities for next-generation iontronics.

关键词： hydrogel capacitive sensor stretchability self-healing self-assembly

Intermetallic Cu_(5)Zr Clusters Anchored on Hierarchical Nanoporous Copper as Efficient Catalysts for Hydrogen Evolution Reaction

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Research 2020年第1期2020卷 510-521页

作者： Hang Shi Yi-Tong Zhou Rui-Qi Yao Wu-Bin Wan qing-Hua Zhang Lin Gu Zi Wen Xing-You Lang Qing Jiang Key Laboratory of Automobile Materials(Jilin University) Ministry of Educationand School of Materials Science and EngineeringJilin UniversityChangchun 130022China Beijing National Laboratory for Condensed Matter Physics The Institute of PhysicsChinese Academy of SciencesBeijing 100190China

Designing highly active and robust platinum-free electrocatalysts for hydrogen evolution reaction is vital for large-scale and efficient production of hydrogen through electrochemical water splitting.Here,we report nonprecious intermetallic Cu_(5)Zr clusters that are in situ anchored on hierarchical nanoporous copper(NP Cu/Cu_(5)Zr)for efficient hydrogen evolution in alkaline medium.By virtue of hydroxygenated zirconium atoms activating their nearby Cu-Cu bridge sites with appropriate hydrogenbinding energy,the Cu_(5)Zr clusters have a high electrocatalytic activity toward the hydrogen evolution reaction.Associated with unique architecture featured with steady and bicontinuous nanoporous copper skeleton that facilitates electron transfer and electrolyte accessibility,the self-supported monolithic NP Cu/Cu_(5)Zr electrodes boost violent hydrogen gas release,realizing ultrahigh current density of 500mAcm^(-2) at a low potential of-280mV versus reversible hydrogen electrode,with exceptional stability in 1M KOH solution.The electrochemical properties outperform those of state-of-the-art nonprecious metal electrocatalysts and make them promising candidates as electrodes in water splitting devices.

关键词： solution reaction. exceptional

Strain-hardening and warm deformation behaviors of extruded Mg-Sn-Yb alloy sheet

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Journal of Magnesium and Alloys 2014年第2期2卷 116-123页

作者： Jing jiang Guangli Bi Guoyong Wang Qing Jiang Jianshe Lian Zhonghao jiang Key Laboratory of Automobile Materials College of Materials Science and EngineeringJilin UniversityNanling CampusChangchun 130025China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China

Strain-hardening and warm deformation behaviors of extruded Mg-2Sn-0.5Yb alloy(at.%)sheet were investigated in uniaxial tensile test at temperatures of 25-250 ℃ and strain rates of 1×10^(−3) s^(−1)-0.1 s^(−1).The data fit with the Kocks-Mecking type plots were used to show different stages of strain hardening.Besides III-stage and IV-stage,the absence of the II-stage strain hardening at room temperature should be related to the sufficient dynamic recrystallization during extrusion.The decrease of strain hardening ability of the alloy after yielding was attributed to the reduction of dislocation density with increasing testing temperature.Strain rate sensitivity(SRS)was significantly enhanced with increasing temperature,and the corresponding m-value was calculated as 0.07-0.12,which indicated that the deformation mechanism was dominated by the climb-controlled dislocation creep at 200 ℃.Furthermore,the grain boundary sliding(GBS)was activated at 250 ℃,which contributed to the higher SRS.The activation energy was calculated as 213.67 kJ mol^(−1),which was higher than that of lattice diffusion or grain boundary self-diffusion.In addition,the alloy exhibited a quasi superplasticity at 250 ℃ with a strain rate of 1×10^(−3) s^(−1),which was mainly related to the fine microstructure and the presence of the Mg2Sn and Mg2(Sn,Yb)particles.

关键词： Mg-Sn-Yb alloy sheet Strain hardening Strain rate sensitivity Activation energy