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Chinese Chemical Letters 2007年第8期18卷 960-962页

作者： Ben Hong Yang Hong Yao Xu Cun Li shan yi Guang School of Chemistry and Chemical Engineering Anhui University Hefei 230039 China College of Material Science and Engineering ＆ State Key Laboratory of Chemical Fibers and Polymeric Materials Donghua University Shanghai 200051 China Department of Chemical and Material Engineering Hefei University Hefei 230022 China

A novel poly（methyl methacrylate-co-polyhedral oligomeric silsesquioxane） hybrid nanocomposite was synthesized by free radical polymerization and characterized by 1H NMR, 29Si NMR, and TGA technologies. Compared wit... 详细信息

关键词： Poly(methyl methacrylate) Polyhedral silsesquioxane Nanoeomposite

Ripening behavior of M_(23)C_6 carbides in P92 steel during aging at 800°C

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Journal of Iron and Steel Research International 2017年第8期24卷 858-864页

作者： Xu Yang Bo Liao Fu-ren Xiao Wei Yan yi-yin shan Ke Yang College of Materials Science and Engineering Yanshan University Institute of Metal Research Chinese Academy of Sciences

The rapid coarsening of the M_（23）C_6 carbides has been held responsible for the creep fracture in 9-12Cr martensitic heat resistant steels.A commercial P92 steel was subjected to thermal aging at a high temperature of 800°C to investigate the ripening behavior of the M_（23）C_6 *** electron microscopy（SEM）and transmission electron microscopy（TEM）were employed to characterize the microstructure evolution,especially the ripening process of the M_（23）C_6 *** new concept of the effective mean size,dependent on the critical radius,was introduced to correct the measured mean size and then the Ostwald theory was applied to describe the ripening behavior of the M_（23）C_6 *** ripening of the M_（23）C_6 carbides was revealed to be grain boundary diffusion controlled.

关键词： P92steel M23C6 carbide Aging Ripening

Vector modeling of robotic helical milling hole movement and theoretical analysis on roughness of hole surface

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Journal of Central South University 2013年第7期20卷 1818-1824页

作者： shan yi-cai HE Ning LI Liang ZHAO Wei YANG yin-fei College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Nanjing College of Information Technology Nanjing 210046 China

To avoid the machine problems of excessive axial force, complex process flow and frequent tool changing during robotic drilling holes, a new hole-making technology (i.e., helical milling hole) was introduced for designing a new robotic helical milling hole system, which could further improve robotic hole-making ability in airplane digital assembly. After analysis on the characteristics of helical milling hole, advantages and limitations of two typical robotic helical milling hole systems were summarized. Then, vector model of helical milling hole movement was built on vector analysis method. Finally, surface roughness calculation formula was deduced according to the movement principle of helical milling hole, then the influence of main technological parameters on surface roughness was analyzed. Analysis shows that theoretical surface roughness of hole becomes poor with the increase of tool speed ratio and revolution radius. Meanwhile, the roughness decreases according to the increase of tool teeth number. The research contributes greatly to the construction of roughness prediction model in helical milling hole.

关键词： helical milling hole robotic hole-making system vector modeling theoretical surface roughness

Preparation and near-infrared optical limiting property of fluorene-containing functional polyacetylene

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Chinese Chemical Letters 2011年第10期22卷 1257-1260页

作者： Nai Bo Lin Yan Feng shan yi Guang Hong Yao Xu College of Material Science and Engineering ＆ College of Chemistry and Chemical Engineering Donghua University Shanghai 201620 China College of Chemistry and Chemical Engineering Anhui University Hefei 230039 China

A novel functional polyacetylene containing fluorene group as a pendant,poly（2-（p-methylstyrene）-7-acetylene-9,9-dioctyl-fluorene）, was synthesized in moderate yield by[Rh（nbd）Cl]_2-Et_3N *** structures and properties of monomer and polymer were characterized and evaluated with FTIR,NMR,UV-vis,GPC and Z-scan,*** results show that the incorporation of fluorene into polyacetylene has endowed the resultant polymer with well optical limiting properties for laser at wavelength 780 nm based on two-photon absorption mechanism.

关键词： Substituted polyacetylene Fluorene Nonlinear optics Two-photon absorption

Application of Improved Fuzzy Immune PID Controller to Bending Control System

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Journal of Iron and Steel Research International 2011年第3期18卷 28-33页

作者： REN Xin-yi DU Feng-shan HUANG Hua-gui ZHANG shang-bin Institute of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina

Based on the hydraulic bending control system,the electrohydraulic servo pressure control simulation model is *** into account of the inadequacy of P-type immune feedback controller,an improved fuzzy immune PID controller is put *** on immune feedback principle of biological immune system,the P-type immune feedback controller is connected with conventional PID controller in series and then in parallel with design fuzzy immune PID *** controller parameters can be adjusted on line by the rules of immune feedback controller and fuzzy *** order to gain the optimal parameters of the controller,the parameters of the controller are off-line optimized by the best multiple optimal model PSO *** simulation results indicate that the method has characteristics of small overshoot,short adjusting time and strong anti-interference ability and *** quality of the strip shape can be further improved.

关键词： electrohydraulic bending system immune feedback control fuzzy control PSO algorithm strip shape

HIC and SSC Behavior of High-Strength Pipeline Steels

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Acta Metallurgica Sinica(English Letters) 2015年第7期28卷 799-808页

作者： Xian-Bo Shi Wei Yan Wei Wang Lian-Yu Zhao yi-yin shan Ke Yang Institute of Metal Research Chinese Academy of Sciences University of Chinese Academy of Sciences Petro China Pipeline Company

In this study,hydrogen-induced cracking（HIC） and sulfide stress corrosion cracking（SSC） behaviors of highstrength pipeline steels in four different strength grades（X70,X80,X90 and X100） with the microstructure of acicular ferrite were *** results showed that both of X70 and X80 steels exhibited better HIC resistance,and their susceptibility to HIC increased with the strength *** parameters,including cracking length ratio,cracking thickness ratio（CTR） and cracking sensitivity ratio,were all increased,and among these,the CTR increased most,with the increase in the strength *** was found to initiate and grow along the hard boundaries such as large size martensite/austenite（M/A） islands and bainitic *** addition,the density of hydrogen-induced blister on the steel surface was increased with the decrease in p H value for the same-grade pipeline *** susceptibilities of X80,X90 and X90-C were revealed to subsequently decrease,which was related to the large size M/A islands.

关键词： Hydrogen-induced cracking Sulfide stress corrosion cracking High-strength pipeline steel Martensite/austenite island (M/A)

Microstructure characteristics of segregation zone in 17-4PH stainless steel piston rod

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Journal of Iron and Steel Research International 2017年第7期24卷 718-723页

作者： Jia-long Tian Wei Wang Wei Yan Zhou-hua Jiang yi-yin shan Ke Yang School of Materials and Metallurgy Northeastern University Institute of Metal Research Chinese Academy of Sciences Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of Sciences

The segregation of Cu and Ni in a 17-4PH stainless steel piston rod has been confirmed to be responsible for the cracking after heat *** investigation showed that the segregation zone was composed of three layers,namely the fine grain martensitic layer,the coarse grain martensitic layer and the coarse grain austenitic layer from the matrix to the crack *** button ingots with the same chemical compositions as those three layers have been prepared to evaluate the grain size distribution,microstructure and mechanical *** effects of Cu and Ni segregation on the microstructures of those three layers have been explored by thermodynamic *** on the microstructure and mechanical properties results,an intensive understanding of the cracking in the segregation zone was therefore reached.

关键词： 17-4PH stainless steel Piston rod Segregation Thermodynamic calculation Crack

Conductive Film with Flexible and Stretchable Capability for Sensor Application and Stealth Information Transmission

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Chinese Journal of Polymer Science 2021年第2期39卷 164-173,I0005页

作者： yi-Fei shan Kun Yang Zhi-Xi Li Xiao-Xiao Wang Hao Li Yong-Yan Cui College of Chemical Engineering and Materials Science Tianjin University of Science and TechnologyTianjin 300457China Institute of Molecular Aggregation Science Tianjin UniversityTianjin 300072China

Flexible and wearable strain sensors for human-computer interaction,health monitoring,and soft robotics have drawn widespread attention to promising applications in the next generation of artificial intelligence ***,conventional semiconductor sensors are difficult to meet the requirements of flexibility and ***,we reported a kind of novel and simple sensor based on layer-by-layer(LBL)*** nanotubes(CNTs)layer provides high ductility and stability in the process of tension sensing,while silver layer provides low initial resistance and fast reflecting in the process of tension *** method ensures the uniformity of the conductive *** sensor has superior sheet resistance of 9.44Ω/sq.,high elongation at break of 104%.For sensing capability,the sensor has wide reflecting range of 60%,high gauge factor(GF)of 1000 up to 60%strain,fast reflecting time of 165 *** reliability and stability have also been *** is also worth mentioning that the entire process does not require any expensive equipments,complicated processes or harsh experimental *** above features provide an idea for large-scale application of flexible stretchable sensors.

关键词： Strain sensor Flexibility Silver films Carbon nanotubes Human motion monitoring

Interaction of β-Cyclodextrin Catalyst with p-Chlorobenzonitrile for the Synthesis of 5-Substituted 1H-tetrazoles in n,n-Dimethylformamide：a DFT Study

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Chinese Journal of Structural Chemistry 2018年第10期37卷 1523-1532页

作者： yi shan-Feng WAN Ya-Li WANG Xue-Ye Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education College of Chemistry Xiangtan University Xiangtan Hunan 411105 China

The synthesis of 5-substituted 1H-tetrazoles in n,n-dimethylformamide（DMF） with b-cyclodextrin（β-CD） as catalyst can get an excellent yield in short reaction *** interaction of β-CD with p-chlorobenzonitrile plays an important role in this *** paper studies the complex of β-CD with p-chlorobenzonitrile using density functional theory（DFT） *** minimum energy structure is investigated in water,DMF and *** bonds are researched on the basis of natural bonding orbital（NBO） *** relative position between p-chlorobenzonitrile and β-CD in DMF is confirmed by 1H nuclear magnetic resonance（1H NMR）.The data from 13 C and 15 N spectra indicate that more positive charges focus on the carbon atom of cyanogroup（C11） and more negative charges concentrate on the nitrogen atom of cyanogroup（N12） upon *** results from frontier molecular orbitals and Mulliken charge reveal that β-CD catalyst improves the reactivity and electrophilicity of ***,the functional group of p-chlorobenzonitrile is easier to be attacked by azide ions in the presence of β-CD as catalyst.

关键词： β-cyclodextrin(β-CD) density functional theory(DFT) catalyst inclusion complex p-chlorobenzonitrfle

Piezo1 suppression reduces demyelination after intracerebral hemorrhage

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Neural Regeneration Research 2023年第8期18卷 1750-1756页

作者： Jie Qu Hang-Fan Zong yi shan shan-Chun Zhang Wei-Ping Guan Yang Yang Heng-Li Zhao Department of Emergency The Sixth Medical Center of Chinese PLA General HospitalBeijingChina The Second Medical Center&National Clinical Research Center for Geriatric Diseases Chinese PLA General HospitalBeijingChina Department of Neurology The Second Medical Center&National Clinical Research Center for Geriatric DiseasesChinese PLA General HospitalBeijingChina Department of Neurosurgery and State Key Laboratory of Trauma Burn and Combined InjurySouthwest HospitalThird Military Medical University(Army Medical University)ChongqingChina

Piezo1 is a mechanically-gated calcium *** studies have shown that Piezo1,a mechanically-gated calcium channel,can attenuate both psychosineand lipopolysaccharide-induced *** oligodendrocyte damage and demyelination occur in intracerebral hemorrhage,in this study,we investigated the role of Piezo1 in intracerebral *** established a mouse model of cerebral hemorrhage by injecting autologous blood into the right basal ganglia and found that Piezo1 was largely expressed soon(within 48 hours)after intracerebral hemorrhage,primarily in *** injection of Dooku1 to inhibit Piezo1 resulted in marked alleviation of brain edema,myelin sheath loss,and degeneration in injured tissue,a substantial reduction in oligodendrocyte apoptosis,and a significant improvement in neurological *** addition,we found that Dooku1-mediated Piezo1 suppression reduced intracellular endoplasmic reticulum stress and cell apoptosis through the PERK-ATF4-CHOP and inositol-requiring enzyme 1 signaling *** findings suggest that Piezo1 is a potential therapeutic target for intracerebral hemorrhage,as its suppression reduces intracellular endoplasmic reticulum stress and cell apoptosis and protects the myelin sheath,thereby improving neuronal function after intracerebral hemorrhage.

关键词： apoptosis Ca^(2+)homeostasis endoplasmic reticulum stress intracerebral hemorrhage myelin basic protein myelin degradation oligodendrocyte Piezo1 stroke white matter injury