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Chinese Journal of Structural Chemistry 2020年第1期39卷 154-163,5页

作者： lin wei-sheng CHEN Wen-Tong Department of Ecological and Resources Engineering Fujian Key Laboratory of Eco-industrial Green TechnologyWuyi UniversityWuyishan 354300China Institute of Applied Chemistry School of Chemistry and Chemical EngineeringJiangxi Province Key Laboratory of CoordinationChemistryJinggangshan UniversityJi’an 343009China State Key Laboratory of Structural Chemistry Fujian Institute of Researchon the Structure of MatterChinese Academy of SciencesFuzhou 350002China

An unprecedented 4f-5d material(La6Hg5Br26)[4(HgBr2)](2Br)(1)was syn-thesized by hydrothermal reactions and structurally characterized by single-crystal X-ray diffraction *** 1 crystallizes in the Pbam space group of orthorhombic system with a=13.0980(10),b=13.6650(9),c=28.010(2)?,V=5013.4(6)?^3,Br36Hg9La6,Mr=5515.53,Z=2,Dc=3.613 g/cm^3,μ(MoKα)=29.457 mm^–1 and F(000)=*** 1 is characteristic of a two-dimensional(2D)layered *** photoluminescent measurements with solid-state samples reveal that compound 1 has a strong emission in the green region of light *** has remarkable CIE chromaticity coordinates of(0.2499,0.3589).A wide optical band gap of 3.41 eV is discovered by the solid-state UV/vis diffuse reflectance *** variable-temperature magnetic susceptibility obeys the Curie-weiss law(cm=c/(T–q))with C=2.48 K and a negative weiss constantθ=–169.07 K as revealed by the magnetic measurements,indicating the existence of an antiferromagnetic interaction in compound 1.

关键词： lanthanide mercury magnetism photoluminescence semiconductor

Experimental,Numerical,and Analytical Studies on the Bending of Mechanically lined Pipe

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China Ocean Engineering 2024年第2期38卷 221-232页

作者： wei Wen-bin YUAN lin ZHOU Jia-sheng LIU Zheng State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China School of Civil Engineering Tianjin UniversityTianjin 300072China School of Mechanical Engineering Tianjin UniversityTianjin 300072China

Mechanically lined pipe(MLP)is often used for offshore oil and gas transport because of its low cost and corrosion *** installation and operation,the pipe may undergo severe bending deformation,which causes the liner to separate from the outer pipe and buckles,affecting the stability of the whole *** this paper,the buckling response of MLP subjected to bending is investigated to clarify its bending characteristics by employing both experiments,numerical simulation,as theoretical *** types of MLPs were manufactured with GB 45 carbon steel(SLP)and Al 6061(ALP)used as the outer pipe material,*** hydraulic expansion and bending experiments of small-scale MLPs are *** addition to the ovalized shape of the cross-section for the SLP specimens,the copper liner was found to wrinkle on the compressive *** contrast,the liner of ALP remains intact without developing any wrinkling and collapse *** addition,a dedicated numerical framework and theoretical models were also *** was found both the manufacturing and bending responses of the MLP can be well reproduced,and the predicted maximum moment and critical curvatures are in good agreement with the experimental results.

关键词： lined pipe bending nonlinear ring theory buckling plasticity

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羊肚菌发酵液的美白及舒缓修复功效研究

日用化学品科学 2024年第7期47卷 49-54页

作者：印辉辉林圣伟廉涵宇郑志祺广州科理肤生物科技有限公司广东广州528200 德州学院山东德州253026

为了研究羊肚菌发酵液的美白及舒缓修复功效,对其进行了成分检测及相关的功效评价。实验结果显示,羊肚菌发酵液中含有多种生物活性物质,其中固体含量为5%,总糖3.8%,总氨基酸为83 mg/L,多酚为54 mg/L;30例人体斑贴实验仅出现1例I级不良反... 详细信息

为了研究羊肚菌发酵液的美白及舒缓修复功效,对其进行了成分检测及相关的功效评价。实验结果显示,羊肚菌发酵液中含有多种生物活性物质,其中固体含量为5%,总糖3.8%,总氨基酸为83 mg/L,多酚为54 mg/L;30例人体斑贴实验仅出现1例I级不良反应;羊肚菌发酵液添加浓度低于5%对细胞无毒性;浓度在1%时斑马鱼黑色素抑制率为48.44%;添加浓度在2.5%和5%时,成纤维细胞愈合率相对提升28.60%和45.27%;当添加浓度大于1.25%时,角质形成炎症因子IL-6和PEG2分泌量显著降低;当添加浓度大于2.5%时,对UVA辐射诱导成纤维细胞CollagenⅠ含量表现出显著的提升作用。实验结果说明护肤品中羊肚菌发酵液的添加量在2.5%~5%对皮肤具有较好的美白舒缓和修复功效,为羊肚菌在护肤品中的应用提供了重要的数据支撑。

关键词：羊肚菌美白舒缓修复发酵液

Upconversion Photoluminescence and Energy Transfer Mechanism of a Novel Terbium-mercury Compound

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Chinese Journal of Structural Chemistry 2019年第6期38卷 1012-1020页

作者： lin wei-sheng KUANG Han-Mao LUO Hui CHEN Wen-Tong Department of Ecological and Resources Engineering Fujian Key Laboratory of Eco-industrial Green TechnologyWuyi UniversityWuyishanFujian 354300China Institute of Applied Chemistry School of Chemistry and Chemical EngineeringJiangxi Province Key Laboratory of Coordination ChemistryJinggangshan UniversityJi'an 343009China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

A novel terbium-mercury complex [Tb(IA)3(H3 O)2]2 n(2 n HgCl4)(n Hg2 Cl5)·n H3 O· 3 n H2 O(1, HIA = isonicotinic acid) has been synthesized through hydrothermal reactions and characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in the C2/c space group of monoclinic system with a = 24.2347(5), b = 20.8342(6), c = 15.3206(3) ?, β = 128.257(2)°, V = 6074.3(2) ?3, C36H41Cl13Hg4N6O20Tb2, Mr = 2458.80, Z = 4, Dc = 2.689 g/cm3, μ(Mo Kα) = 13.014 mm–1 and F(000) = 4520. The crystal structure of 1 is characterized by a one-dimensional(1-D) chain-like structure. Solid-state UV/Vis diffuse reflectance spectrum reveals the existence of a wide optical band gap of 3.36 eV. Solid-state photoluminescence experiment uncovers that it shows reddish brown upconversion emission. The emission bands are originated from the characteristic emission of the 4 f electrons intrashell transition of the 5D4 → 7 FJ(J = 6, 5, 4) of the Tb3+ ions. Energy transfer mechanism is explained by the energy level diagram of the Tb3+ ion and the isonicotinic acid ligand. It shows a remarkable CIE chromaticity coordinates(0.4158, 0.4005).

关键词： crystal CIE energy transfer mechanism photoluminescence terbium

Photophysical Performance and Energy Transfer Mechanism of a 1-D Chain-like Complex

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Chinese Journal of Structural Chemistry 2020年第4期39卷 747-755页

作者： lin wei-sheng HUANG Jian-Gen WEN Yun-Xiang LUO Hui CHEN Wen-Tong Department of Ecological and Resources Engineering Fujian Key Laboratory of Eco-industrial Green TechnologyWuyi UniversityWuyishanFujian 354300China Institute of Applied Chemistry School of Chemistry and Chemical EngineeringJiangxi Province Key Laboratory of Coordination ChemistryHumic Acid Utilization Engineering Research Center of Jiangxi ProvinceJinggangshan UniversityJi’anJiangxi 343009China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

By means of solvothermal reactions,a novel lanthanide-mercury compound,{[Ho(IA)3(H3O)2]2n[2n(HgCl4)][n(HgCl5)]}·3nH3O·nH2O(1,HIA=isonicotinc acid)was prepared and structurally characterized by single-crystal X-ray *** 1 crystallizes in the C2/c space group of monoclinic system with a=24.2147(5),b=20.8106(4),c=15.3060(3)Å,β=128.326(2)°,V=6050.8(2)Å3,C36H45Cl13Hg3Ho2N6O20,Mr=2274.26,Z=4,Dc=2.497 g/cm^3,μ(MoKα)=10.817 mm-1 and F(000)=*** exhibits a one-dimensional(1-D)chain-like ***-state photoluminescence measurement shows that it displays brown light emission *** emission bands originate from the characteristic emissions of the 4f electrons intrashell transitions of 5S2→5I8 and 5F5→5I8 of the holmium(Ⅲ)ions in *** photoluminescence emission energy transfer mechanism is elucidated by the energy level diagrams of the holmium(Ⅲ)ions and isonicotinic acid *** 1 has CIE chromaticity coordinates of(0.4361,0.4992).Solid-state UV/Vis diffuse reflectance spectra reveal that it possesses wide optical band gap of 4.94 eV.

关键词： chromaticity coordinate energy transfer isonicotinc acid lanthanide Photoluminescence

Alloy strategy to synthesize Pt-early transition metal oxide interfacial catalysts

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Nano Research 2024年第4期17卷 3390-3397页

作者： Shi-Long Xu Hang Nan Wanqun Zhang Yue lin sheng-Qi Chu Hai-wei Liang Hefei National Research Center for Physical Sciences at the Microscale Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026China School of Materials and Chemical Engineering Anhui Jianzhu UniversityHefei 230601China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Metal oxide supported metal catalysts show promising catalytic performance in many industry-relevant ***,the enhancement of performance is often limited by the insufficient metal/metal oxide *** this work,we demonstrate a general synthesis of Pt-early transition metal oxide(Pt-MO_(x),M=Ti,Zr,V,and Y)catalysts with rich interfacial sites,which is based on the air-induced surface segregation and oxidation of M in the supported Pt-M alloy *** characterizations verify the dynamic structural response of Pt-M alloy catalysts to air and the formation of Pt-MO_(x) catalysts with abundant interfacial *** prepared Pt-TiO_(x) interfacial catalysts exhibit improved performance in hydrogenation reactions of benzaldehyde,nitrobenzene,styrene,and furfural,as a result of the heterolytic dissociation of H_(2) at Pt-metal oxide interfacial sites.

关键词： Pt-early transition metal oxide interfacial catalyst alloy oxidation strategy interfacial sites hydrogenation reactions heterolytic dissociation

The Existence of a Meridional Curve in Closed Incompressible Surfaces in Fully Alternating link Complements

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Chinese Annals of Mathematics,Series B 2024年第1期45卷 73-80页

作者： wei lin School of Mathematical Sciences Dalian University of TechnologyDalian 116024LiaoningChina

Menasco showed that a closed incompressible surface in the complement of a non-split prime alternating link in S^(3) contains a circle isotopic in the link complement to a meridian of the *** on this result,he was able to argue the hyperbolicity of non-split prime alternating links in *** et *** that if F■S×I\L is an essential torus,then F contains a circle which is isotopic in S×I\L to a meridian of *** author generalizes his result as follows:Let S be a closed orientable surface,L be a fully alternating link in S×I\If F ■ S×I\L is a closed essential surface,then F contains a circle which is isotopic in S×I\L to a meridian of L.

关键词： Fully alternating Incompressible surfaces Meridionally incompressible

Traveling Wave Characteristics Based Pilot Protection Scheme for Hybrid Cascaded HVDC Transmission line

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 971-980页

作者： Dalin Mu sheng lin Xiaopeng Li the School of Electrical Engineering Southwest Jiaotong UniversityChengdu 611756China the State Grid Sichuan Electric Power Research Institute Chengdu 610041China

The hybrid cascaded high-voltage direct current(HVDC)transmission system has various operation modes,and some operation modes have sharply increasing requirements for protection rapidity,while the traditional pilot differential protection(PDP)has poor rapidity,and even refuses to operate when faults occur on the DC ***,a novel pilot protection scheme based on traveling wave characteristics is ***,the adaptability of the traditional PDP applied in engineering is analyzed for different operation ***,the expressions of the forward traveling wave(FTW)and backward traveling wave(BTW)on the rectifier side and the inverter side are derived for different fault *** the theoretical derivation,the difference between the BTW and FTW on the rectifier side is less than zero,and the same is true on the inverter ***,in the event of an external fault of DC line,the difference between the BTW and FTW at nearfault terminal protection installation point is greater than ***,by summing over the product of the difference between BTW and FTW of the rectifier side and that of the inverter side,the fault identification criterion is *** simulation results show that the proposed pilot protection scheme can quickly and reliably identify the short-circuit faults of DC line in different operation modes.

关键词： Hybrid cascaded high-voltage direct current(HVDC)transmission system DC line operation mode pilot protection

Source model of the 2018 M_(w)7.5 Papua New Guinea earthquake constrained by InSAR measurements: Insight into a blind rupture beneath the New Guinea Highlands

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Geodesy and Geodynamics 2024年第4期15卷 315-325页

作者： wei Chen Tianchen sheng wei Xiong Key Laboratory of Earthquake Geodesy Institute of SeismologyChina Earthquake AdministrationWuhan 430071China Qinghai Provincial Basic Surveying and Mapping Institute Xining 810001China School of Geodesy and Geomatics Wuhan UniversityWuhan 430079China

The Southern Highland Fold and Thrust Belt(SHFTB),the boundary of the Australian plate and the New Guinea Highland block,significantly contributes to the convergent deformation along the plate ***,due to the lack of observation data,the detailed slip pattern of the SHFTB and the orogenic mechanism beneath the New Guinea Highlands remains *** 25 February 2018,the M_(w)7.5 Papua New Guinea(PNG)earthquake struck the southeastern segment of the *** detailed rupture characteristics of this event is significant for further clarifying the inter-seismic slip pattern along the ***,the coseismic deformation field of this earthquake was obtained using high-resolution ALOS-2 satellite *** find that the 2018 M_(w)7.5 PNG earthquake ruptured a large-scaled fault(SHFTB)extending to the lower crust(deeper than 20 km)beneath the New Guinea Highlands,with a dip angle of 24°.The slips on the fault plane are equivalent to moment magnitudes of M_(w)*** major asperities with thrust-dominated slip of up to 3.94 m are detected on the fault *** finding implies that the slip pattern on the eastern segment of the SHFTB is dominated by thrust,rather than with significant sinistral movement,as previously *** tectonic deformation across the New Guinea Highlands is possibly concentrated on the large-scale fault SHFTB and primarily controls the intra-continental orogeny in the central Papua New Guinea.

关键词： 2018M_(w)7.5PapuaNewGuineaearthquake The Southern Highlands Fold-and-Thrust Belt InSAR Slipdistribution Seismicrisk

Theoretical study on the stability of nanobubbles and its verification in molecular dynamics simulation

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Particuology 2024年第4期87卷 99-105页

作者： sheng Mi Chaofeng Hou wei Ge School of Chemical Engineering and Technology Tianjin UniversityTianjin300072China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing.100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

The stability of vapor nanobubbles in bulk liquid was investigated theoretically and the critical bubble size was derived from macroscale thermodynamic equations,below which the system destabilizes with sharp drop in *** critical size was quantitatively verified in molecular dynamic simulation using the Lennard-Jones model of argon,where stronger attraction between the molecules at lower density is found to contribute most to the drop of system pressure and,as the Laplace pressure on the curved bubble interface fails to balance the pressure difference across the interface,the bubbles become *** theoretical model could be extended to other systems where reliable equations of state and interfacial tension are available.

关键词： Nanobubble Stability Phase diagram Critical size