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The dependence of stress and strain rate on the deformation behavior of a Ni‐based single crystal superalloy at 1050°C

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International Journal of Mechanical System Dynamics 2021年第1期1卷 121-131页

作者： Qingqing Ding Hongbin Bei lulu li Jie Ouyang Xinbao Zhao Xiao Wei Ze Zhang School of Materials Science and Engineering Zhejiang UniversityHangzhouChina Polytechnic Institute Zhejiang UniversityHangzhouChina

Ni‐based single crystal(SX)superalloys are important high‐temperature materials used for manufacturing turbine blades in aero‐*** service under combinational impacts of temperature and stress,the SX superalloy may reach its life due to plastic deformation,which normally accompanies time‐dependent microstructural *** reveal this dynamically mechanical response,tensile tests at 1050°C are carried out to record stress‐strain curves at five stain rates as well as creep curves at four applied *** microstructures and defects have been analyzed to understand mechanical behaviors and the underlying mechanism by using advanced scanning electron and scanning transmission electron *** show that the de-formation mode of the alloy strongly depends on the strain rates/applied stresses under mechanical *** dislocation density inside theγphase is extremely low at all tests,indicating that theγphase is relatively weak and ready to flow at this temperature even at a very fast strain *** deformation behavior of theγ′phase is much *** fast strain rates or high applied stresses,the dislocation density in theγ′phase is very high,contributing to high‐stress requirements to deform the *** slow strain rates or low applied stresses,rafting microstructures develop and the de-formation mode becomes directional coarsening/diffusion‐*** results de-monstrate a comprehensive understanding of the deformation mechanism of Ni‐based SX superalloys,which may provide lifetime prediction of the mechanical fail-ure,as well as the database for superalloy applications in mechanical systems.

关键词： creep defects deformation behavior microstructure Ni‐based single crystal superalloy strain rate sensitivity

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Neutrophil extracellular traps mediate the crosstalk between glioma progression and the tumor microenvironment via the HMGB1/RAGE/IL-8 axis

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Cancer Biology & Medicine 2020年第1期17卷 154-168页

作者： Caijun Zha Xiangqi Meng lulu li Shan Mi Da Qian Ziwei li Pengfei Wu Shaoshan Hu Shihong Zhao Jinquan Cai Yanhong liu Department of Laboratory Diagnosis The Second Affiliated Hospital of Harbin Medical UniversityHarbin 150086China Department of Neurosurgery The Second Affiliated Hospital of Harbin Medical UniversityHarbin 150086China Neuroscience Institute Heilongjiang Academy of Medical SciencesHarbin 150086China

Objective:Neutrophil extracellular traps(NETs)produced by tumor-infiltrating neutrophils(TINs)are associated with poor prognosis in patients with several types of ***,the mechanisms underlying the involvement of NETs in glioma progression remain largely *** study aimed to elucidate the roles of NETs in biological processes that drive the crosstalk between glioma progression and the tumor ***:Neutrophil infiltration and NETs formation were investigated in glioma tissue through immunohistochemistry,and their relationships with clinicopathological features and outcomes were statistically *** effects of NETs on glioma cell progression were studied in a co-culture *** vivo and in vitro experiments validated the reactive oxygen species activity and cytokine production of TINs,as well as the ERK signaling pathway activation and the metastasis of ***:Neutrophil infiltration and NETs formation were induced in high-grade glioma compared with low-grade *** induced by TINs were determined to be an oncogenic marker of high-grade gliomas and to be involved in cell proliferation and *** overproduction promoted glioma cell proliferation,migration,and ***,HMGB1 was found to bind to RAGE and activate the NF-κB signaling pathway in *** addition,NETs stimulated the NF-κB signaling pathway,thus promoting IL-8 secretion in ***,IL-8 recruited neutrophils which in turn mediated NETs formation via the PI3 K/AKT/ROS axis in ***:Our results suggest that NETs produced by TINs mediate the crosstalk between glioma progression and the tumor microenvironment by regulating the HMGB1/RAGE/IL-8 *** NETs formation or IL-8 secretion may be an effective approach to inhibit glioma progression.

关键词： Neutrophil extracellular traps HMGB1 IL-8 NF-κB glioma microenvironment

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Complete synchronization of coupled Boolean networks with arbitrary finite delays

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Frontiers of Information Technology & Electronic Engineering 2020年第2期21卷 281-293页

作者： Jie liU lulu li Habib M.FARDOUN School of Mathematics Hefei University of TechnologyHefei 230009China Department of Information Systems Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah 21589Saudi Arabia

In this study,the complete synchronization problem of coupled delayed Boolean networks(CDBNs)is *** state delays and output delays may not be equal,and the state delay in each Boolean network may be different in the proposed CDBN *** on the semi-tensor product of matrices,a necessary and sufficient condition for the complete synchronization of CDBNs is ***,an efficient algorithm for solving the synchronization of CDBNs is ***,numerical examples are presented to demonstrate the effectiveness of our algorithm.

关键词： Boolean networks Synchronization Time delay

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Crystal facet engineering coexposed CuIn(200)and In(101)in CuIn alloy nanocatalysts enabling selective and stable CO_(2)electroreduction

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Journal of Energy Chemistry 2023年第11期86卷 569-578,I0012页

作者： lulu li Yang Zhang Xi Luo Israr Masood ul Hasan Kai Wu Bing Nan Yanxing Zhang Nengneng Xu Jinli Qiao State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Environmental Science and EngineeringShanghai 201620China College of Materials and Textile Engineering Jiaxing UniversityJiaxing 314001ZhejiangChina Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China School of Physics Henan Normal UniversityXinxiang 453007HenanChina Institute of Soil and Environmental Sciences University of Agriculture FaisalabadFaisalabad 38040Pakistan

The electrocatalytic carbon dioxide reduction reaction(eCO_(2)RR)into high-value-added chemicals and fuels is a promising strategy to mitigate global ***,it remains a significant stumbling block to the rationally tuning lattice plane of the catalyst with high activity to produce the target product in the eCO_(2)RR *** attempt to solve this problem,the Culn bimetallic alloy nanocatalyst with specifically exposed lattice planes is modulated and electrodeposited on the nitrogen-doped porous carbon cloth by a simple two-step electrodeposition method,which induces high Faraday efficiency of 80%towards HCOO-(FEHCOO-)with a partial current density of 13.84 mA cm-2at-1.05 V(***).Systematic characterizations and theoretical modeling reveal that the specific coexposed Culn(200)and In(101)lattice facets selectively adsorbed the key intermediate of OCHO*,reducing the overpotential of HCOOH and boosting the FEHCOO-in a wide potential window(-0.65--1.25 V).Moreover,a homogeneous distribution of Culn nanoparticles with an average diameter of merely~3.19 nm affords exposure to abundant active sites,meanwhile prohibiting detachment and agglomeration of nanoparticles during eCO_(2)RR for enhanced stability attributing to the self-assembly electrode *** study highlights the synergistic effect between catalytic activity and facet effect,which opens a new route in surface engineering to tune their electrocatalytic performance.

关键词： Electrocatalytic CO_(2) reduction reaction Culn alloy Crystal facetengineering Nanocatalyst

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Enhancing low-temperature NH_(3)-SCR performance of Fe-Mn/CeO_(2)catalyst by Al_(2)O_(3)modification

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Journal of Rare Earths 2022年第9期40卷 1454-1461,I0005页

作者： lulu li Jiawei Ji Wei Tan Wang Song Xin Wang Xiaoqian Wei Kai Guo Wanyu Zhang Changjin Tang lin Dong School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210093China Jiangsu Key Laboratory of Vehicle Emissions Control School of EnvironmentCenter of Modern AnalysisNanjing UniversityNanjing 210093China School of Environment Nanjing Normal UniversityNanjing 210093China

In the work,supported catalysts of FeO_(x) and MnO_(x) co-supported on aluminum-modified CeO_(2)was synthesized for low-temperature NH_(3)-selective catalytic reduction(NH_(3)-SCR)of ***,the SCR activity of the obtained catalyst is markedly influenced by the adding amount of Al and the appropriate Ce/Al molar ratio is 1/*** activity tests demonstrate that Fe-Mn/Ce1 Al2 catalyst shows over 90%NO conversion at 75-250℃and exhibits better SO_(2)resistance compared to Fe-Mn/CeO_(2).Fe-Mn/Ce1 Al2 shows the expected physicochemical characters of the ideal catalyst including the larger surface and increased active reaction active sites by controlling the amount of Al ***,the better catalytic activity is well correlated with the present advantaged surface adsorption oxygen species,Mn^(4+)species,Ce^(3+)species and the enhanced reducibility of Fe-Mn/Ce1 Al2,which is superior to the Fe-Mn/CeO_(2)*** importantly,we further demonstrate that the amount and strength of surface acid sites are improved by Al-doping and more active intermediates(monodentate nitrate)is generated during NH_(3)-SCR *** work provides certain insight into the rational creation of simple and practical denitration catalyst environmental purification.

关键词： Selectivity catalytic reduction NO removal Low-temperature activity Al doping Cerium dioxide Rare earths

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Direct Ink Writing of Highly Conductive MXene Frames for Tunable Electromagnetic Interference Shielding and Electromagnetic Wave-Induced Thermochromism

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Nano-Micro Letters 2021年第10期13卷 14-28页

作者： Xinyu Wu Tingxiang Tu Yang Dai Pingping Tang Yu Zhang Zhiming Deng lulu li Hao-Bin Zhang Zhong-Zhen Yu State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China

The highly integrated and miniaturized next-generation electronic products call for high-performance electromagnetic interference(EMI)shielding materials to assure the normal operation of their closely assembled ***,the most current techniques are not adequate for the fabrication of shielding materials with programmable structure and controllable shielding ***,we demonstrate the direct ink writing of robust and highly conductive Ti3C2Tx MXene frames with customizable structures by using MXene/AlOOH inks for tunable EMI shielding and electromagnetic wave-induced thermochromism *** as-printed frames are reinforced by immersing in AlCl_(3)/HCl solution to remove the electrically insulating AlOOH nanoparticles,as well as cross-link the MXene sheets and fuse the filament interfaces with aluminum *** freeze-drying,the resultant robust and porous MXene frames exhibit tunable EMI shielding efficiencies in the range of 25-80 dB with the highest electrical conductivity of 5323 S m−***,an electromagnetic wave-induced thermochromic MXene pattern is assembled by coating and curing with thermochromic polydimethylsiloxane on a printed MXene pattern,and its color can be changed from blue to red under the high-intensity electromagnetic *** work demonstrates a direct ink printing of customizable EMI frames and patterns for tuning EMI shielding efficiency and visualizing electromagnetic waves.

关键词： MXene Electromagnetic interference shielding Direct ink writing Electrical conductivity Thermochromism

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Electrochemical Approaches to CO_(2) Conversion on Copper-Based Catalysts

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Accounts of Materials Research 2023年第3期4卷 212-222页

作者： Gong Zhang lulu li Zhi-Jian Zhao Tuo Wang Jinlong Gong School of Chemical Engineering and Technology Key Laboratory for Green Chemical Technology of Ministry of EducationTianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China

CONSPECTUS:As one of the essential pathways to carbon neutrality or carbon negativity,the electrochemical reduction of CO_(2) offers tremendous prospects for platform chemicals and fuel ***(Cu)is currently the only metal material that is able to reduce CO_(2) to multicarbon(C2+)*** the fact that copper-based materials have been investigated for decades,we still confront numerous challenges on the path to the fundamental understanding and large-scale deployment of copper-based electrocatalysts for CO_(2) *** fundamental investigations,it remains a variety of open questions about the CO_(2) reduction *** convoluted C−C coupling pathways and product bifurcation processes confuse the design of efficient *** active sites of copper-based catalysts remain ambiguous due to surface *** for theoretical calculations,the construction of electrolyte−electrode models and the investigation of solvation effects are premature for obtaining confident *** addition,simple and easily scalable techniques for catalyst synthesis still need to be continuously *** practical applications,the CO_(2) electrolyzer with copper-based materials must be operated with high current densities,high Faradaic efficiencies,high energetic efficiencies,high single-pass conversion rates(high product concentration),and long ***,due to the intricate nature of electrochemical systems,a high-performance copper-based electrocatalyst alone is not sufficient to meet all of the above commercialization ***,reactor design involving mass transfer enhancement calls for more research *** on the above background and the urgency of the net-zero goal,we initiated our research on CO_(2) electrolysis using copper-based materials with an emphasis on active site identification and mass transfer *** Account describes our contribution to the field of C_(2+)products *** fir

关键词： stability catalyst Copper

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Evaluation of grain breakage sensitivity of maize varieties mechanically-harvested by combine harvester

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International Journal of Agricultural and Biological Engineering 2020年第5期13卷 8-16页

作者： Yizhou Wang lulu li Shang Gao Yanan Guo Guoqiang Zhang Bo Ming Ruizhi Xie Jun Xue Peng Hou Keru Wang Shaokun li Institute of Crop Sciences Chinese Academy of Agricultural SciencesKey Laboratory of Crop Physiology and EcologyMinistry of Agriculture and Rural AffairsBeijing 100081China

A high grain breakage rate is the main problem that occurs during mechanical maize harvest in *** breakage sensitivity of different varieties was significantly different,and the breakage resistance is ***,breakage resistant variety screening can help improve the field production efficiency and provide references for breeding *** this study,42 varieties of maize were harvested with the same mechanical parameters and the same manipulator on a range of harvest dates at experimental stations in Xinxiang,Henan Province,in 2017 and Changji,Xinjiang Province,in 2018 to determine the sensitivity of grain moisture content on grain breakage rate during machine harvest for different *** integral value of the grain breakage rate curve corresponding to the range of 15%to 30%grain moisture content was used as an index that expressed the sensitivity of maize grains to breakage depending on grain moisture content(BSW).Forty-two varieties were categorized as having weak,intermediate,or strong *** the same four varieties in the two stations,lianchuang 825 and lianchuang 808 were classified as sensitive and fragile varieties,Shandan 650 was classified as an intermediate variety,Zeyu 8911 was divided into weak sensitive and breakage-resistance varieties in Xinxiang and intermediate varieties in *** BSW classification results at the two experimental sites were generally consistent,indicating that breakage sensitivity due to moisture content may be a relatively stable genetic *** study suggested that the integral method for determining BSW can be used to assess the resistance of different maize varieties to grain breakage during mechanical *** integral method was used to identify twelve breakage-resistant varieties in Xinxiang Station,and six breakage-resistant varieties in Changji *** study provides a method for screening maize varieties that are suited to mechanical grain harvesting and for studying t

关键词： maize mechanical grain harvest breakage resistance integral method varieties classification

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Contractility detection of isolated mouse papillary muscle using myotronic Myostation-Intact device

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Animal Models and Experimental Medicine 2022年第5期5卷 445-452页

作者： Hong lian Zhuyun Qin Mengge Wu Peipei Zuo lina Bai Minjie Lu lulu li Haitao Zhang State Key Laboratory of Cardiovascular Disease Fuwai HospitalNational Center for Cardiovascular DiseaseChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Beijing Key Laboratory of Preclinical Research and Evaluation for Cardiovascular Implant Materials Animal Experimental CenterFuwai HospitalNational Center for Cardiovascular DiseaseChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Adult Surgical Intensive Care Unit Fuwai HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina National Health Commission Key Laboratory of Cardiovascular Regenerative Medicine Fuwai Central-China HospitalCentral-China Subcenter of National Center for Cardiovascular DiseasesZhengzhouChina

Background:To understand the relationship between myocardial contractility and ex-ternal stimuli,detecting ex vivo myocardial contractility is ***:We elaborated a method for contractility detection of isolated C57 mouse papillary muscle using Myostation-Intact system under different frequencies,volt-ages,and calcium ***:The results indicated that the basal contractility of the papillary muscle was 0.27±0.03 mN at 10 V,500-ms pulse duration,and 1 *** 0.1 to 1.0 Hz,con-tractility decreased with an increase in frequency(0.45±0.11-0.10±0.02 mN).The voltage-initiated muscle contractility varied from 3 to 6 V,and the contractility gradu-ally increased as the voltage increased from 6 to 10 V(0.14±0.02-0.28±0.03 mN).Moreover,the muscle contractility increased when the calcium concentration was increased from 1.5 to 3 mM(0.45±0.17-1.11±0.05 mN);however,the contractility stopped increasing even when the concentration was increased to 7.5 mM(1.02±0.23 mN).Conclusions:Our method guaranteed the survivability of papillary muscle ex vivo and provided instructions for Myostation-Intact users for isolated muscle contractility investigations.

关键词： calcium concentration frequency isolated papillary muscle muscle contractility Myostation-intact voltage

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Direct experimental detection of hydrogen radicals in non-oxidative methane catalytic reaction

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Journal of Energy Chemistry 2021年第1期30卷 372-376,I0012页

作者： Jianqi Hao Pierre Schwach lulu li Xiaoguang Guo Junben Weng Hailei Zhang Hao Shen Guangzong Fang Xin Huang Xiulian Pan Chunlei Xiao Xueming Yang Xinhe Bao State Key Laboratory of Catalysis National Laboratory for Clean Energy2011-Collaborative Innovation Center of Chemistry for Energy MaterialsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Key Laboratory of Nuclear Physics and Ion-beam Application Institute of Modern PhysicsFudan UniversityShanghai 200433China

Non-oxidative conversion of methane to olefins,aromatics and hydrogen(MTOAH) has been reported recently over metal single sites such as iron and *** reaction was proposed to involve catalytic activation of methane followed by gas phase C-C coupling of methyl *** study using H atom Rydberg Tagging time-of-flight technique provides direct experimental evidence for the formation of hydrogen radicals during MTOAH reaction over a catalytic quartz wall reactor containing embedded iron species(denoted as Fe-reactor).Fe-reactor gives 7.3% methane conversion at 1273 K with 41.2% selectivity toward C2(ethane,ethylene and acetylene) and 31.8% toward BTX(benzene,toluene and xylene),*** enhancing effects of hydrogen radicals on overall MTOAH performance are validated by cofeeding hydrogen donor benzene,which provides an additional route of methane activation apart from catalytic activation.

关键词： Non-oxidative methane conversion Catalytic Fe-reactor H radical Experimental detection Methane activation

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