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Journal of Iron and Steel Research International 2024年第2期31卷 501-518页

作者： Bao-sheng Liu Peng-fei xu Shao-hua Zhang Yan-rui Li Li-ming Mou Jia-li Li Yue-zhong Zhang Pei-mao {1. Fa-cai Shi College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina College of Chemical and Biological Engineering Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina Technical Center Taiyuan Iron and Steel(Group)Co.Ltd.Taiyuan030003ShanxiChina

The corrosion mechanism of 51.L low alloy steel treated by acid-cleaned surface(ACS)and eco-pickled surface(EPS)techniques in three simulated solutions(S0:atmospheric environment;S1.soil environment;S2.industrial environment)and the influence of interaction between different corrosive anions on corrosion were *** results show that the total corrosion rates of samples in three simulated solutions were in order of S2.S0>S1.which is simultaneously correlated with initial corrosion dissolution processes as well as after the formation of corrosion ***3−will inhibit the initial corrosion owing to the formation of films,whereas HSO3−will accelerate the dissolutions of the matrix based on the synergistic action of HSO3−and Cl−.On the other hand,there is no significant difference in corrosion rates between the samples treated by ACS and EPS *** EPS technique that is safe,reusable and environmentally friendly can be further widely used in future work.

关键词： Corrosion mechanism Low alloy steel Simulated solution Surface technique Immersion time

Structure and Mixed Electronic-ionic Conducting Properties of La_(0.6)Sr_(0.4)Co_(1.y)Fe_yO_3(y=0-1.0) Ceramics Made by a Citrate Method

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Journal of wuhan university of Technology(Materials Science) 2008年第1期23卷 80-84页

作者：黄端平徐庆 school of Materials Science and Engineering Wuhan University of Technology

La0.6Sr0.4Co1.yFeyO3（y= 0-1.0） powders were synthesized by a citrate method, and the structure and mixed electronic-ionic conducting properties of the resulting ceramics were investigated. The synthesized La0.6Sr0.4Co1.yFeyO3 powders have a pure perovskite structure and consist of uniform and fine particles. A perovskite struciure with rhombohedral symmetry was certified for the La0.6Sr0.4Co1.yFeyO3 ceramics. The increase of Co/Fe ratio significantly promoted the grain growth and microstructural densification. The La0.6Sr0.4Co1.yFeyO3 compositions with relatively higher Co/Fe ratio exhibit superior mixed conducting properties. The electronic structure and microstructure of the ceramics are responsible for the variation of the mixed conducting properties with Co/Fe ratio.

关键词： ceramics oxides chemical synthesis microstructure electrical properties

Malware Evasion Attacks Against IoT and Other Devices: An Empirical Study

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Tsinghua Science and Technology 2024年第1期29卷 127-142页

作者： Yan xu Deqiang Li Qianmu Li Shouhuai xu school of Computer Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China school of Computer Science Nanjing University of Posts and TelecommunicationsNanjing 210023China Department of Computer Science University of Colorado Colorado SpringsColorado SpringsCO 80918USA

The Internet of Things(loT)has grown rapidly due to artificial intelligence driven edge *** enabling many new functions,edge computing devices expand the vulnerability surface and have become the target of malware ***,attackers have used advanced techniques to evade defenses by transforming their malware into functionality-preserving *** systematically analyze such evasion attacks and conduct a large-scale empirical study in this paper to evaluate their impact on *** specifically,we focus on two forms of evasion attacks:obfuscation and adversarial *** the best of our knowledge,this paper is the first to investigate and contrast the two families of evasion attacks *** apply 1. obfuscation attacks and 9 adversarial attacks to 2.70 malware *** obtained findings are as follows.(1.Commercial Off-The-Shelf(COTS)malware detectors are vulnerable to evasion attacks.(2.Adversarial attacks affect COTS malware detectors slightly more effectively than obfuscated malware examples.(3)Code similarity detection approaches can be affected by obfuscated examples and are barely affected by adversarial attacks.(4)These attacks can preserve the functionality of original malware examples.

关键词： Android malware obfuscation adversarial examples

Enhanced Surface Properties Induced by High Current Pulsed Electron Beam (HCPEB) Treatment

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稀有金属材料与工程 2011年第S4期40卷 178-180页

作者： Hao Shengzhi1.2.Wang Huihui1.2.Li Mincai1.3,xu Yang1.3,Dong Chuang1.3 1.ey Laboratory of Materials Modification by Laser,Ion and Electron Beams,Ministry of Education,Dalian university of Technology,Dalian 1.602.,china2.2. of Physics and Optoelectronics Engineering,Dalian university of Technology,Dalian 1.602.,china3{2. of Material Science and Engineering,Dalian university of Technology,Dalian 1.602.,china Dalian Univ Technol Minist Educ Key Lab Mat Modificat Laser Ion & Electron Beams Dalian 116024 Peoples R China Dalian Univ Technol Sch Phys & Optoelect Engn Dalian 116024 Peoples R China Dalian Univ Technol Sch Mat Sci & Engn Dalian 116024 Peoples R China

High current pulsed electron beam (HCPEB) has been developed as a useful tool for surface treatment of *** the present work,the fundamental principle of HCPEB source was described along with the device configuration and working *** the different kinds of HCPEB surface treatment experiments conducted,the enhanced surface properties induced by HPCEB treatment were illustrated and explained with their microstructure characterization results.

关键词： high current pulsed electron beam surface treatment microstructure property

Piezo1.channel exaggerates ferroptosis of nucleus pulposus cells by mediating mechanical stress-induced iron influx

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Bone Research 2024年第2期12卷 334-348页

作者： Ziqian Xiang Pengfei Zhang Chunwang Jia Rongkun xu Dingren Cao Zhaoning xu Tingting Lu Jingwei Liu Xiaoxiong Wang Cheng Qiu Wenyang fu Weiwei Li Lei Cheng Qiang Yang Shiqing Feng Lianlei Wang Yunpeng Zhao Xinyu Liu Department of Orthopaedics Qilu Hospital of Shandong UniversityJinan 250012China university of Health and Rehabilitation Sciences Qingdao 226000China Xiangya school of Medicine Central South UniversityChangsha 410013China school of Nursing and Rehabilitation Shandong UniversityJinan 250012China Department of Pediatrics Cangzhou Central HospitalCangzhou 061011China Department of Pediatric Surgery Qilu Hospital of Shandong UniversityJinan 250012China Department of Pathology Qilu Hospital of Shandong UniversityJinan 250012China Department of Spine Surgery Tianjin HospitalTianjin UniversityTianjin 30021China The Second Hospital of Shandong university Cheeloo College of MedicineShandong UniversityJinan 250012China

To date,several molecules have been found to facilitate iron influx,while the types of iron influx channels remain to be ***,Piezo1.channel was identified as a key iron transporter in response to mechanical ***1.mediated iron overload disturbed iron metabolism and exaggerated ferroptosis in nucleus pulposus cells(NPCs).Importantly,Piezo1.induced iron influx was independent of the transferrin receptor(TFRC),a well-recognized iron ***,pharmacological inactivation of Piezo1.profoundly reduced iron accumulation,alleviated mitochondrial ROS,and suppressed ferroptotic alterations in stimulation of mechanical ***,conditional knockout of Piezo1.Col2.1.CreERT Piezo1.(flox/flox))attenuated the mechanical injury-induced intervertebral disc degeneration(IVDD).Notably,the protective effect of Piezo1.deficiency in IVDD was dampened in Piezo1.Gpx4 conditional double knockout(cDKO)mice(Col2.1.CreERT Piezo1.(flox/flox)/Gpx4^(flox/flox)).These findings suggest that Piezo1.is a potential determinant of iron influx,indicating that the Piezo1.iron-ferroptosis axis might shed light on the treatment of mechanical stress-induced diseases.

关键词： stress overload channel

Simulation of Thermodynamics and Kinetics for KR Desulphurization

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Journal of Iron and Steel Research International 2011年第S2期18卷 98-106页

作者： xu An-jun1. ZHANG Mao-lin{1. ZHANG Hui-ning1. LI An-dong3 (1. school of Metallurgical and Ecological Engineering, university of Science and Technology Beijing, Beijing 1.0083,{{1. {1. Steel-Making and Continuous Casting Engineering Institute, Capital Engineering and Research Incorporation Limited, Beijing 1.01.6,{{1. 3. Stainless Steel Company, Baosteel Group, Shanghai {1.1.00,{{1.) Univ Sci & Technol Beijing Sch Met & Ecol Engn Beijing 100083 Peoples R China Capital Engn & Res Inc Ltd Steel Making & Continuous Casting Engn Inst Beijing 100176 Peoples R China Stainless Steel Co Baosteel Grp Shanghai 201900 Peoples R China

This paper seeks to optimize parameters, reduce the cost of desulphurization and the consumption of operation about KR pretreatment of hot metal at the Stainless Steel Company, Baosteel Group. Based on the theoretical analysis of physical chemistry in metallurgy, simulation experiments of the KR desulphurization of hot metal were conducted in a laboratory and the composition of the desulphurization was optimized, by means of chemical analysis, DSC, SEM and EDS. The water modeling displays the fluid flow characteristics of KR desulphurization. Combination of the techniques and production at the Stainless Steel Company, Baosteel Group, the optimized parameters of the process are put forward.

关键词： desulphurization of hot metal KR, desulphurization thermodynamics water model

Study on Ceramic Cutting by Plasma Arc

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厦门大学学报（自然科学版） 2002年第S1期41卷 55-56页

作者： xu Wen-ji 1. FANG Jian-cheng {1. LU Yi-shen 1.(1. school of Mechanical Engineering, Dalian university of Technology, Dalian 1.60{1.,{{1. {1. College of Mechanical Engineering and Automation, Huaqiao university, Quanzhou 36{1.1.,{{1.)

Engineering ceramics are typical difficult-to-machine materials because of high hardness and brittleness. PAC (Plasma Arc Cutting) is a very important thermal cutting process and has been successfully used in cutting stainless steel and other difficult-to-machine alloys. PAC’s application in cutting ceramics, however, is still limited because the most ceramics are not good electronic conducts, and transferred plasma arc cannot be produced between cathode and work-piece. So we presented a method of plasma arc cutting engineering ceramics with additional anode. To reduce the kerf width and to improve the kerf quality, the hydro-magnetically confined plasma arc is used to cut engineering ceramic plates. By experiments and analyses the mechanism and characteristics of hydro-magnetic confined plasma are discussed and the effects of secondary confinement on cutting quality, arc properties, and optimal process parameters are presented. When the nozzle diameter is 3 mm, the kerf width of the Al {1. 3 ceramic plate with 6 mm thickness is less than 4.6 mm, and the cutting speed reaches to 0.9～1.{1.m/min. Both theoretical analysis and experimental results have proved the feasibility and validity of the newly advanced hydro-magnetic plasma arc cutting, and the following conclusion can be drawn: (1.Synthesizing the advantages of both the water-constriction and magnetic constriction, the hydro-magnetic constriction of plasma arc forms a three-dimensional constriction with improved shape and uniformity of arc column, narrower kerfs, minimal beveling of cuts and higher dross-free cutting speeds than those under either water-constriction or magnetic constriction alone.({1.Hydro-magnetic constriction is capable of improving arc stability, which is reflected in the higher arc voltage at which arc-extinction occurs, than that under any single constriction. (3)For a given diameter of nozzle, quality cut can be produced by using a lower arc current than usually required in conventional plas

关键词： plasma cutting engineering ceramic plasma confinement

Study on the coating of nano-scale SiO_2.film on the surface of nanocrystalline Mg-Al layered double hydroxides

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Science china Chemistry 2005年第2期48卷 107-114页

作者： ZHANG Zejiang1.2.3, MEI Xiujuan2. xu Chenghua1.& QIU Fali1.1. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 61.041. china 2. Sichuan Fire Research Institute of Public Security Ministry, Chengdu 61.830, china 3. Graduate {2. of the Chinese Academy of Sciences, Beijing 1.0039, china Correspondence should be addressed to Zhang Zejiang (email: zzjzzjzz@***) 1. Chengdu Institute of Organic Chemistry Chinese Academy of Sciences 610041 Chengdu China 2. Sichuan Fire Research Institute of Public Security Ministry 611830 Chengdu China 3. Graduate school of the Chinese Academy of Sciences 100039 Beijing China

The coating process of a nano-scale SiO2.film on the nanocrystalline Mg-Al layered double hydroxides via a sol-gel process was investigated. The uniform and dense SiO2.ilm with a thickness of about 5 nm on the nano-LDHs particles was characterized by the solubility test in the dilute HNO3 or HCl acid, TEM and FT-IR, XRD, TG and DSC. The chemical shifts of binding en- ergies of Al 2., Mg 2., Si 2. and O 1. on the coated particles indicate that the coating of the SiO2.nano-film on the surface of the nano-LDHs proceeds through the formation of Mg-O-Si and Al-O-Si bonds. The thermal analysis shows that both the SiO2.coated nano-LDHs and the nano-LDHs have a similar mass loss process, in which there are three obvious stages of mass loss in the temperature range of 40—700℃. furthermore, the more the coatedamount of SiO2.n the surface of the nano-LDHs is, the less the mass loss of the samples is at 700℃.The nano- LDHs have two obvious endothermic peaks at 2.4.67℃ and 430.1.℃, whose corresponding heat absorption capacities are 41.0}2. J/g and 336.30 J/g, respectively. In contrast, the coated nano-LDHs have only one endothermic peak at 2.3.60℃ with a heat absorption capacity of 2.1.2. J/g.

关键词： layered double hydroxides, nanocrystalline, silica, coating.

Isolation via enrichment and characterization of ten polymorphic microsatellite loci in the cuttlefish, Sepiella maindroni de Rochebruns

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Acta Oceanologica Sinica 2010年第6期29卷 121-124页

作者： WU Changwen CHI Changfeng HE Guangyuan LU Zhenming xu Meiying Key Laboratory of Molecular Biophysics Ministry of Education China-UK HUST-RRes Genetic Engineering and Genomics Joint Laboratory Huazhong University of Science and Technology Wuhan 430074 China Marine Science school Zhejiang Ocean University Zhoushan 316004 China Zhejiang Dahaiyang Science and Technology CO. Ltd. Zhoushan 316004 China

Ten novel polymorphic microsatellite loci were developed using an enrichment and colony hybridization protocol and characterized for the cuttlefish,Sepiella *** was explored by using 30 individuals from the coastal waters of Zhanjiang,Guangdong province,china,in December *** number of alleles ranged from 5 to *** ranges of observed and expected heterozygosity were from 0.578 9 to 1.000 0 and 0.68{1.8 to 0.9{1. 7,respectively,and the average polymorphic information content （P IC） was 0.778 *** microsatellite loci will certainly facilitate the detection of the genetic variation and population structure of ***.

关键词： SepieUa maindroni microsatellite DNA cuttlefish genetic variation

Nickel-catalyzed arylcyanation of alkenes via cyano group translocation:access to 1.n-dinitriles or 4-amino nitriles

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Science china Chemistry 2024年第9期67卷 2975-2981页

作者： Xiaohong Li Shenfan Wang Xiangxiang fu Donghui Xing Zeyuan fu Yuanfu Deng Huanfeng Jiang Liangbin Huang State Key Laboratory of Pulp and Paper Engineering School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China

Herein,a nickel-catalyzed arylcyanation of unactivated alkenes via cyano group translocation with aryl boronic acids has been *** transformations provided a robust approach to constructing structurally diverse 1.n-dinitriles or 4-amino nitriles from easily prepared and commercially available starting *** cyano group translocation was achieved,involving the addition into the intramolecular C–N triple bond followed by the retro-Thorpe *** studies revealed that high temperature and CsHCO_(3) as the base were crucial for the cyano group translocation.

关键词： arylcyanation nickel catalysis cyano group translocation 1 n-dinitriles 4-amino nitriles