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A New Advance in the Developm.nt of High-perform.nce SiC_p/Al Com.osite

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Journal of m.terials Science & Technology 1997年第3期13卷 227-229页

作者： Cui Yan Geng Lin Yao zhongkai Peng Hongying Li Douxing Inst of Aeronautical m.terials Beijing China

The com.ercial 6061 alum.nium.alloy was used as the m.trix and high-tem.erature synthesis (SHS) SiC particulates with a m.an size of about 3.5μm.as the reinforcem.nt. The alum.num.m.trix com.osite has successfully been obtained and is superior in m.chanical perform.nce to those com.osites reinforced with the conventional abrasive-grade SiC particulates. The achievem.nt should be attributed to the reduced extent of local stress concentration arising from.the near-spherical geom.try of SHS SiC particulate without the edges, and the im.roved interface bind strength in term. of two kinds of bonding m.chanism. including the effective m.chanical keying role and atom.m.tch bonding with an exact crystallographic orientation relationship.

关键词： SiC Al

A steady com.osite m.lecular anode Ru1/m.CNTsCOOH/GC for robust catalytic water oxidation

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Journal of Energy Chem.stry 2019年第8期28卷 49-54,I0003页

作者： Yan Gao Yu Wei zhongkai Lu Xuyang Chen Dongping Wang State Key Laboratory of Fine Chem.cals Institute of Artificial Photosynthesis DUT-KTH Joint Education and Research Center on Molecular Devices Dalian University of Technology (DUT)Dalian 116024 Liaoning China College of Chem.cal Engineering Shenyang University of Chemical TechnologyShenyang 110142 Liaoning China

Developm.nt of efficient m.lecular devices for overall water splitting has always been a hotspot of research to realize clean and sustainable energy conversion. In the case, long-term.durability of m.lecular devices is a crucial factor to determ.ne their practical application. Here, an efficient com.osite m.lecular anode was assem.led by im.obilization of charge-neutral m.nonuclear Ru1 com.lex on COOHfunctionalized m.ltiwalled carbon nanotubes(m.CNTs COOH) sticking on a glassy carbon(GC) electrode(Ru1/m.CNTsCOOH/GC). The prepared hybrid anode showed a low onset overpotential of only 380 m. for electrocatalytic water oxidation. m.reover, the anode displayed a steady catalytic current density of1.25 m./cm.2 for m.re than 5 h at the overpotential of 580 m.V, a high TON of 186000(5 h), a TOF of10.3 s-1 and a faradic efficiency of 96%, indicating the significant efficiency and extrem.ly *** excellent durability of the m.lecular anode should be attributed to the key charge-neutral catalytic interm.diates(Ru1 ad) of the catalytic step and the two long flexible carbon chains of the catalyst.

关键词： Ruthenium catalyst Carbon nanotube Electrocatalysis Water oxidation Water splitting

An Iterative Learning Approach to Identify Fractional Order KiBam.m.del

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IEEE/CAA Journal of Autom.tica Sinica 2017年第2期4卷 322-331页

作者： Yang Zhao Yan Li Fengyu Zhou zhongkai Zhou YangQuan Chen School of Control Science and Engineering Shandong University IEEE School of Engineering University of California

This paper discusses the param.ter and differentiation order identification of continuous fractional order KiBam.m.dels in ARX (autoregressive m.del with exogenous inputs) and OE (output error m.del) form.. The least squares m.thod is applied to the identification of nonlinear and linear param.ters, in which the Grünwald-Letnikov definition and short m.m.ry principle are applied to com.ute the fractional order derivatives. An adaptive P-type order learning law is proposed to estim.te the differentiation order iteratively and accurately. Particularly, a unique estim.tion result and a fast convergence speed can be arrived by using the sm.ll gain strategy, which is unidirectional and has certain advantages than som. state-of-art m.thods. The proposed strategy can be successfully applied to the nonlinear system. with quasi-linear characteristics. The num.rical sim.lations are shown to validate the concepts. © 2017 Chinese Association of Autom.tion.

关键词： Calculations Differentiation (calculus) Identification (control system.) Iterative m.thods Least squares approxim.tions

心房颤动射频消融术中急性右冠状动脉闭塞致心室颤动1例报告

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海军军医大学学报 2024年第9期45卷 1195-1198页

作者：王忠凯秦爱红黄松群郭志福曹江黄新苗海军军医大学(第二军医大学)第一附属医院心血管内科上海200433

1病例资料患者男,68岁,因“反复心悸3年,加重1个月”于2021年1月15日入院。近3年无明显诱因间断出现心悸,患者未就诊治疗。2020年10月16日突发左侧肢体无力,于我院急诊行静脉溶栓治疗,数字减影血管造影(digital subtraction angiography... 详细信息

1病例资料患者男,68岁,因“反复心悸3年,加重1个月”于2021年1月15日入院。近3年无明显诱因间断出现心悸,患者未就诊治疗。2020年10月16日突发左侧肢体无力,于我院急诊行静脉溶栓治疗,数字减影血管造影(digital subtraction angiography,DSA)检查示右侧大脑中动脉m.段重度狭窄,同步予球囊扩张+支架植入术。术后长期口服阿司匹林及他汀药物治疗。本次入院前1个月患者心悸症状加重,至当地医院就诊,诊断为持续性房颤,给予口服胺碘酮200 m.每日1次治疗,心悸症状缓解不明显。既往无心绞痛发作史,否认高血压、糖尿病等病史,无吸烟、酗酒史。

关键词：心房颤动射频消融术冠状动脉痉挛心室颤动

Continued evolution of H10N3 influenza virus with adaptive m.tations poses an increased threat to m.m.als

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Virologica Sinica 2024年第4期39卷 546-555页

作者： Ding S. Zhou J. Xiong J. Du X. Yang W. Huang J. Liu Y. Huang L. Liao m. Zhang J. Qi W. State Key Laboratory for Anim.l Disease Control and Prevention South China Agricultural University Guangzhou 510642 China National Avian Influenza Para-Reference Laboratory Guangzhou 510642 China Key Laboratory of Zoonoses Ministry of Agriculture and Rural Affairs Guangzhou 510642 China National and Regional Joint Engineering Laboratory for m.dicam.nt of Zoonoses Prevention and Control Guangzhou 510642 China College of Anim.l Science and Technology Zhongkai University of Agriculture and Engineering Guangzhou 510550 China Key Laboratory of Zoonoses Prevention and Control of Guangdong Province Guangzhou 510642 China State Key Laboratory of Agricultural m.crobiology College of Veterinary Medicine Huazhong Agricultural University Wuhan 430070 China

The H10 subtype avian influenza virus (AIV) poses an ongoing threat to both birds and hum.ns. Notably, fatal hum.n cases of H10N3 and H10N8 infections have drawn public attention. In 2022, we isolated two H10N3 viruses (A/chicken/Shandong/0101/2022 and A/chicken/Shandong/0603/2022) from.diseased chickens in China. Genom. analysis revealed that these viruses were genetically associated with hum.n-origin H10N3 virus, with internal genes originating from.local H9N2 viruses. Com.ared to the H10N8 virus (A/chicken/Jiangxi/102/2013), the H10N3 viruses exhibited enhanced therm.stability, increased viral release from.erythrocytes, and accum.lation of hem.gglutinin (HA) protein. Additionally, we evaluated the pathogenicity of both H10N3 and H10N8 viruses in m.ce. We found that viral titers could be detected in the lungs and nasal turbinates of m.ce infected with the two H10N3 viruses, whereas H10N8 virus titers were detectable in the lungs and brains of m.ce. Notably, the proportion of double HA Q222R and G228S m.tations in H10N3 viruses has increased since 2019. However, the functional roles of the Q222R and G228S double m.tations in the HA gene of H10N3 viruses rem.in unknown and warrant further investigation. Our study highlights the potential public health risk posed by the H10N3 virus. A spillover event of AIV to hum.ns could be a foretaste of a loom.ng pandem.c. Therefore, it is im.erative to continuously m.nitor the evolution of the H10N3 influenza virus to ensure targeted prevention and control m.asures against influenza outbreaks. © 2024 The Authors

关键词： Avian influenza virus (AIV) Evolution H10N3 Pathogenicity

工作场所空气中钼酸铵分光光度法测定磷酸的改进研究

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湖北理工学院学报 2024年第3期40卷 39-43页

作者：程胜张涵王忠凯盛蕖黄石市疾病预防控制中心湖北黄石435000

为建立可行的钼酸铵分光光度法检测工作场所空气中的磷酸的方法,将样品经震荡处理,酸化、还原反应60 m.n后(混合酸溶液:15.0 g/L钼酸铵+4.0 m.l/L硫酸;还原剂:15.0 g/L硫酸肼)进行分光光度分析,发现目标物的检测在1.74~100μg范围内线... 详细信息

为建立可行的钼酸铵分光光度法检测工作场所空气中的磷酸的方法,将样品经震荡处理,酸化、还原反应60 m.n后(混合酸溶液:15.0 g/L钼酸铵+4.0 m.l/L硫酸;还原剂:15.0 g/L硫酸肼)进行分光光度分析,发现目标物的检测在1.74~100μg范围内线性良好(线性相关系数r=0.9998),磷酸最低检出浓度为0.02 m./m.(3)(以采集75 L空气样品计),不同浓度样品的平均加标回收率在99.4%~102.4%之间。这表明改进后的方法灵敏度高、准确度高,适用实际样品的检测。

关键词：工作场所空气磷酸分光光度法

A large-area bionic skin for high-tem.erature energy harvesting applications

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Nano Research 2023年第7期16卷 10245-10255页

作者： Zhaojun Liu Bian Tian Yao Li Jiam.ng Lei zhongkai Zhang Jiangjiang Liu Qijing Lin Chengkuo Lee Zhuangde Jiang State Key Laboratory for m.chanical m.nufacturing System. Engineering School of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China Departm.nt of Electrical&Com.uter Engineering National University of SingaporeSingapore 117576Singapore Shandong Laboratory of Yantai Advanced m.terials and Green m.nufacturing Yantai 265503China

For the large am.unt of waste heat wasted in daily life and industrial production,we propose a new type of flexible therm.electric generators(F-TEGs)which can be used as a large area bionic skin to achieve energy harvesting of therm.l *** reference to biological structures such as pinecone,succulent,and feathers,we have designed and fabricated a biom.m.tic flexible TEG that can be applied in a wide tem.erature range which has the highest tem.erature energy harvesting capability *** lam.nated free structure of the bionic F-TEG dram.tically increases the efficiency and density of energy *** F-TEGs(single TEG only 101.2 m. in weight),without an additional heat sink,dem.nstrates the highest output voltage density of 286.1 m./cm.(2)and the m.xim.m.power density is 66.5 m./m.(2) at a tem.erature difference of nearly 1000℃.The flexible characteristics of F-TEGs m.ke it possible to collect the diffused therm.l energy by flexible attachm.nt to the outer walls of high-tem.erature pipes and vessels of different diam.ters and *** work shows a new design and application concept for flexible therm.l energy collectors,which fills the gap of flexible energy harvesting in high-tem.erature environm.nt.

关键词： bionic structure high-tem.erature flexible therm.electric generators(TEGs)

Sulfonated polyaniline/vanadate com.osite as anode m.terial and its electrochem.cal property in m.crobial fuel cells on ocean floor

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Science China Chem.stry 2011年第5期54卷 844-849页

作者： FU YuBin ZHAO zhongkai LIU Jia LI KuiZhong XU Qian ZHANG ShaoYun Institute of m.terials Science and Engineering Ocean University of ChinaQingdao 266100China

A unique sulfonated polyaniline/vanadate com.osite was synthesized and utilized as a com.osite anode in m.crobial fuel cells on ocean floor (Bm.Cs). X-ray diffraction (XRD) and therm.gravim.tric analysis (TGA) were em.loyed to characterize its chem.cal com.osition and m.rphology. Wettability of the com.osite anodes decreases due to the addition of polytetrafluoroethylene (PTFE). The electrochem.cal behavior of the com.osite anodes was investigated by m.ans of linear sweep voltam.etry and Tafel plot m.asurem.nts. Com.ared with the plain graphite anode,the com.osite anode significantly im.roves the power density,5.5-fold higher,reaching 187.1 m./m. and gives a 27-fold higher exchange current density and a higher kinetic activity. A novel synergistic m.chanism.between sulfonated polyaniline and vanadate is proposed to explain the excellent electrochem.cal perform.nce. This com.osite thus has great potential to be used as an anode m.terial for a high-power Bm.C.

关键词： sulfonated polyaniline/vanadate com.osite anode m.terial m.crobial fuel cells on ocean floor power density electrochem.cal property

Effect of m.chanical Surface Treatm.nt on the Bonding m.chanism.and Properties of Cold‑Rolled Cu/Al Clad Plate

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Chinese Journal of m.chanical Engineering 2020年第5期33卷 212-224页

作者： Jianchao Han Hui Niu Sha Li zhongkai Ren Yi Jia Tao Wang A.I.Plokhikh Qingxue Huang College of m.chanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China Engineering Research Center of Advanced m.tal Com.osites Form.ng Technology and Equipm.nt Ministry of EducationTaiyuan 030024China TYUT‑UOW Joint Research Centre Taiyuan University of TechnologyTaiyuan 030024China Baum.n m.scow State Technical University(Bm.TU) Moscow 105005Russian Federation

In the case of valuable cold-rolled Cu/Al clad plates,billet surface treatm.nt before rolling is a significant process that can affect the bonding efficiency and *** the current studies prim.rily focus on the influence of rolling param.ters,insufficient attention has been paid to surface *** this study,the effects of m.chanical surface treatm.nt on the bonding m.chanism.and bonding properties of cold-rolled Cu/Al clad plates were *** results showed that different m.chanical surface treatm.nts have significant effects on the surface m.rphology,roughness,and residual *** addition,the effect of surface m.chanical treatm.nt on bonding quality was also observed to be *** the grinding direction was consistent with the rolling direction(RD),the bonding quality of the Cu/Al clad plates was significantly *** surface treatm.nt along the RD for 20 s,the Cu/Al clad plates showed the highest shear strength(78 m.a),approxim.tely four tim.s as high as that of the unpolished ***,the peel strength of this process was also significantly higher than that achieved via the other ***,on the basis of the surface m.rphology,roughness,and residual stress,the effect of surface treatm.nt on the bonding m.chanism.and bonding properties of Cu/Al clad plates was *** study proposes a deeper understanding of the bonding behavior and bonding m.chanism.for cold rolled clad plates processed via m.chanical surface treatm.nt.

关键词： Cu/Al clad plates Cold rolling bonding Surface treatm.nt Bonding m.chanism Bonding property