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Superoxide Dismutase Plays an Important Role in Maize Resistance to Soil CO_(2)Stress

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Acta Geologica Sinica(English Edition) 2023年第3期97卷 995-1001页

作者： XUE Lu MA junjie HU Qian MA Jinfeng Carbon Neutral College(Yulin) Northwest UniversityXi’an 710069China College of Life Science Yulin UniversityYulinShaanxi 719000China National&Local Joint Engineering Research Center of Carbon Capture and Storage Technology Northwest UniversityXi’an 710127China Shaanxi Key Laboratory for Carbon Neutral Technology Northwest UniversityXi’an 710069China Department of Geology Northwest UniversityXi’an 710069China College of Urban and Environmental Sciences Northwest UniversityXi’an 710127China Oil Production Plant No.1 Sinopec North China Oil&Gas CompanyXianyangShaanxi 712000China

CO_(2)capture and storage(CCS)has the risk of CO_(2)leakage,and this leakage always increases soil CO_(2)concentration,and the long-term CO_(2)stress damages crop production in *** maize,the growth characteristics,such as plant height and yield,and physiological indexes(osmoregulation substances and antioxidant enzymes)were explored under different simulative CO_(2)leakage ***,the relationship between maize physiological indexes and soil CO_(2)concentration was analyzed,showing that soil CO_(2)stress inhibited maize growth to a certain extent,resulting in shorter plants,thinner stems and lower kernel *** an increase in soil CO_(2)concentration,the contents of malondialdehyde,soluble sugar and soluble protein in maize leaves increased;with continuing stress,the increase rate of malondialdehyde was greatly augmented,whereas the increase rates of soluble sugar and soluble protein *** extended CO_(2)stress,the activity of the enzyme superoxide dismutase(SOD)increased continuously,while the activities of catalase and peroxidase first increased and then *** dismutase activity was closely correlated with soil CO_(2)concentration(r=0.762),and responded quickly to the change of soil CO_(2)concentration(R~2=0.9951).Therefore,SOD plays an important role in maize resistance to soil CO_(2)*** study will help further understanding of the mechanism of maize tolerance to soil CO_(2)stress,providing a theoretical basis for agricultural production in CCS project areas.

关键词： CO_(2)capture and storage CO_(2)leakage soil CO_(2)stress antioxidant enzyme system maize

Robust adaptive time-varying region tracking control of multi-robot systems

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Science China(Information Sciences) 2023年第5期66卷 291-292页

作者： junjie FU Yuezu LV Wenwu YU Jiangsu Key Laboratory of Networked Collective Intelligence School of Mathematics Southeast University

Dear editor,Multi-robot systems have been employed in more and more areas in recent years due to their high efficiency, low cost and impressive robustness. When the number of agents is large, efective control of the multi-agent systems becomes a challenging problem due to the infeasibility of centralized control. One promising strategy is to control only the shape of the system instead of the precise relative positions of the robots [1].

关键词： Multipurpose robots

Effect of Current Density on Microstructure and Corrosion Behavior of Plasma Electrolytic Oxidation Coated 6063 Aluminum Alloy

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Journal of Wuhan University of Technology(Materials Science) 2018年第6期33卷 1503-1510页

作者： ZHUANG junjie SONG Renguo School of Materials Science and Engineering Changzhou University Jiangsu Key Laboratory of Materials Surface Science and Technology Changzhou University Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering Changzhou University School of Materials Science and Engineering Jiangsu University of Science and Technology

Plasma electrolytic oxidation(PEO) coatings were fabricated on 6063 aluminum alloy in a cheap and convenient electrolyte. The effect of different current densities, i e, 5, 10, 15, and 20 A/dm2on the microstructure and corrosion behavior of coatings was comprehensively studied by scanning electron microscopy(SEM), stereoscopic microscopy, potentiodynamic polarization and electrochemical impedance spectroscopy(EIS), respectively. It is found that the pore density decreases and the pore size increases with increasing current density. The XRD results show that the coatings are only composed of α-Al2O3and γ-Al2O3. Potentiodynamic polarization test proves that the coating formed under 10 A/dm2possesses the best anticorrosion property. The long time EIS test shows that the coating under 10 A/dm2is able to protect the aluminum alloy substrate after long time of immersion in 0.59 M NaCl solution, which confirms the salt solution immersion test results in 2 M NaCl solution.

关键词： coating 6063 aluminum alloy plasma electrolytic oxidation (PEO) current density corrosion resistance

Yb^(3+)-doped Fluorophosphate Glass with High Cross Section and Lifetime

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Journal of Materials Science & Technology 2010年第10期26卷 921-924页

作者： Liyan Zhang Yuxin Leng junjie Zhang Lili Hu Key Laboratory of Materials for High Power Laser Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 China

Yb3＋ doped fluorophosphate （FP/Yb） glasses with emission cross section and fluorescence lifetime as high as 0.8388×10-20 cm 2 and 2.3 ms were developed,and AlF3 content is proved to decrease the lifetime *** scale glass casting procedure shows high Tx-Tg doesn t make better casting crystallization stability in *** Yb laser is difficult to be obtained in FP glass,a 230 mw laser was still achieved from 2 mm thick samples under 976 nm LD excitation because of the large gain parameter（σemiτf） of the FP/Yb *** test also proved the relationship between laser output and gain *** with its wide and flat effective gain property,this FP/Yb glass is a practical new potential material for low power ultra-short pulse application.

关键词： FP15/Yb glass Crystallization stability Gain parameter

Ultrasonic scalpel based on fusiform phononic crystal structure

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Chinese Physics B 2024年第10期33卷 302-310页

作者： Sha Wang junjie Shan Shuyu Lin Ocean College Jiangsu University of Science and TechnologyZhenjiang 212100China Shaanxi Key Laboratory of Ultrasonics School of Physics and Information TechnologyShaanxi Normal UniversityXi’an 710119China National Laboratory of Solid State Microstructures School of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

In response to the ultrasonic scalpels with the vibrational modal coupling which leads to a decrease in efficiency,an ultrasonic scalpel based on fusiform phononic crystals(PnCs)is *** accurate theoretical model is constructed,which is mainly composed of electromechanical equivalent circuit models to analyze the frequency response function and the frequency response curves of the *** band gaps exist in the fusiform PnCs owing to the periodic constraint,which can suppress the corresponding vibrational *** vibration characteristics(vibration mode,frequency,and displacement distribution)of the ultrasonic scalpel are analyzed,and the validity of the electromechanical equivalent circuit method is *** results indicate that other vibration modes near the working frequency can be *** addition,blades based on fusiform PnCs have a function akin to that of the horn,which enables displacement amplification.

关键词： phononic crystals ultrasonic scalpel bandgap vibration characteristics

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螺牙高度对螺纹桩竖向承载特性的影响

土木与环境工程学报（中英文） 2025年第1期47卷 36-45页

作者：徐丽娜齐晨晖郑俊杰黄占芳孙爽武汉大学土木建筑工程学院武汉430072 中铁十一局集团有限公司武汉430061 吉林建筑大学交通科学与工程学院长春130118 吉林建筑大学土木工程学院长春130118 山东理工大学建筑工程与空间信息学院山东淄博255000

为探明竖向荷载作用下螺牙高度对螺纹桩承载特性及桩周土体的影响,通过室内半面模型桩试验,结合数字图像相关技术(DIC),研究了不同螺牙高度、不同荷载条件对桩身承载性能、桩周土体破坏特征、桩周土体位移场的影响。采用ABAQUS数值模拟... 详细信息

为探明竖向荷载作用下螺牙高度对螺纹桩承载特性及桩周土体的影响,通过室内半面模型桩试验,结合数字图像相关技术(DIC),研究了不同螺牙高度、不同荷载条件对桩身承载性能、桩周土体破坏特征、桩周土体位移场的影响。采用ABAQUS数值模拟方法对模型试验的结果进行验证,并扩展了螺牙高度的取值范围,分析螺纹桩桩身极限承载力与材料利用率、桩周土体应力场分布随螺牙高度变化的规律。结果表明:增加螺牙高度能提升桩身承载力,增大桩周土体位移影响范围,延缓桩侧土体剪切破坏的发展;随着桩身沉降量增加,桩顶荷载以桩侧阻力承受为主,逐渐演变为以桩端阻力承受为主;螺牙高度的增加虽然能提升桩身极限承载力,但桩身材料利用率存在峰值。

关键词：螺纹桩螺牙高度模型试验数字相关技术位移场

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Roles of IκB kinase ε in the innate immune defense and beyond

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Virologica Sinica 2016年第6期31卷 457-465页

作者： junjie Zhang Mao Tian Zanxian Xia Pinghui Feng State Key Laboratory of Medical Genetics and School of Life Sciences Central South University Changsha 410008 China

IκB kinase ε(IKKε) is a non-canonical IκB kinase that is extensively studied in the context of innate immune response. Recently, significant progress has been made in understanding the role of IKKεin interferon(IFN) signaling. In addition to its roles in innate immunity, recent studies also demonstrate that IKKε is a key regulator of the adaptive immune response. Specifically, IKKεfunctions as a negative feedback kinase to curtail CD8 T cell response, implying that it can be a potential therapeutic target to boost antiviral and antitumor T cell immunity. In this review, we highlight the roles of IKKε in regulating IFN signaling and T cell immunity, and discuss a few imminent questions that remain to be answered.

关键词： innate immunity interferon signaling antiviral defense antitumor regulating phosphorylate highlight

City-wide vehicle dispatching for multi-hop ridesharing package delivery

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The Journal of China Universities of Posts and Telecommunications 2020年第5期27卷 82-90页

作者： Zhao Xiyu Zhang Xuefei Liu junjie Wang Yining School of Telecommunication Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

The city-wide ridesharing package delivery is becoming popular as it provides a convenience such as extra profits to the vehicle’s driver and high traffic efficiency to the *** vehicle dispatching is a significant issue to improve the ridesharing efficiency in package *** classic one-hop ridesharing package delivery requires the highly similar paths between the package and the vehicle given by the limited detour time,which depresses the ridesharing *** tackle this problem,a city-wide vehicle dispatching strategy for the multi-hop ridesharing package delivery was proposed,where a package is permitted to be delivered sequentially by different vehicles,until arriving the *** study formulates the vehicle dispatching as a maximum multi-dimensional bipartite matching problem with the goal of maximizing the total saving distance given by the limited detour time and ridesharing capacity.A multi-hop ridesharing vehicle dispatching algorithm was proposed to solve this problem by selecting the farthest reachable locker and multi-dimensional *** results based on real vehicle dataset of Beijing demonstrate the effectiveness and efficiency of the proposed vehicle dispatching strategy.

关键词： multi-hop ridesharing package delivery vehicle dispatching

Exploring the characteristics of microbial community and enzyme activity in the aged refuse landfill environment of Taiyuan,China

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Pedosphere 2024年第5期34卷 879-891页

作者： Fen HOU junjie DU Yuzhou MENG Xihui WU Department of Land Resource Management School of Public AdministrationShanxi University of Finance and EconomicsTaiyuan 030006China College of Life Science Shanxi Engineering Research Center of Microbial Application TechnologiesShanxi Normal UniversityTaiyuan 030031ChinaTechnologiesShanxi Normal University

Municipal solid waste landfill is the main disposal option for domestic garbage,in which microbial activities play an important ***,despite the widespread practice of landfilling,the metagenomic microbial profiles of landfill sites remain poorly *** this study,we used a combination of physicochemical analysis,ultraviolet-visible spectrophotometry,and high-throughput Illumina shotgun sequencing to systematically investigate the changes in soil enzyme activities,microbial community structure,and functional attributes in aged refuse collected from the Xingou Municipal Solid Waste Landfill in Taiyuan,China,with ordinary topsoil from an area within 5 km of the landfill as control *** for neutral phosphatase(P=0.065),the activities of urease,laccase,dehydrogenase,sucrase,neutral protease,andβ-glucosidase were all significantly reduced(P<0.05)in the aged refuse compared with the control ***,catalase activity was found to be significantly elevated in the aged *** with the control soil,aged refuse was characterized by higher richness and diversity of microbial communities,as reflected by the higher values of community richness estimators(Chao 1 and ACE)and diversity indices(Shannon and Simpson).In total,186 phyla,4354 genera,and 34459 species were identified,with 132 phyla,1914 genera,and7369 species showing significantly different abundances between the aged refuse and the control *** and Acidobacteria were identified as the dominant phyla in the control soil,whereas Proteobacteria,Euryarchaeota(archaea),and Firmicutes were found to predominate in the aged ***,Euryarchaeota and Methanoculleus were the major taxa detected in the aged refuse,but were almost completely absent in the control *** biodegradation and bacterial chemotaxis were the main functions of the microflora in the aged refuse,whereas the carbohydrate,amino acid,energy,and lipid metabolism pathways were significantl

关键词： functional attribute metabolism pathway municipal solid waste landfll resource utilization soil microflora