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The Time-Dependent Von Kármán Shell Equation as a Limit of Three-Dimensional Nonlinear Elasticity

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Journal of Systems Science & Complexity 2021年第2期34卷 465-482页

作者： QIN Yizhao yao peng-fei Department of Mathematical Science Tsinghua UniversityBeijing 100084China Key Laboratory of Systems and Control Institute of Systems ScienceAcademy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049China

The asymptotic behaviour of solutions of three-dimensional nonlinear elastodynamics in a thin shell is considered,as the thickness h of the shell tends to *** the appropriate scalings of the applied force and of the initial data in terms of h,it’s verified that three-dimesional solutions of the nonlinear elastodynamic equations converge to solutions of the time-dependent von Kármán equations or dynamic linear equations for shell of arbitrary geometry.

关键词： Nonlinear elasticity thin shell time-dependent von Kármán equations

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Three Co(Ⅱ) Coordination Polymers Incorporated with a Bent Connector: Crystal Structures and Magnetic Properties

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Chinese Journal of Structural Chemistry 2019年第4期38卷 587-596页

作者： LIU Han-Fu LI Hai-Ye yao peng-fei SHU Chun-Yue HUANG Fu-Ping School of Chemistry and Pharmacy Guangxi Normal University College of Pharmacy Guilin Medical University

Based on the bent ligand 1 H-3-(3-pyridyl)-5-(4-pyridyl)-1,2,4-triazole(3,4?-Hbpt) with Co(Ⅱ) ions as well as a series of polycarboxylate co-ligands, three new coordination polymers were yielded, namely, {[Co(op)(3,4?-Hbpt)(H_2O)_3]?2 H_2O}n(1), [Co(cyc)(3,4′-Hbpt)(H_2O)]n(2) and [Co(pro)(3,4′-Hbpt)(H_2O)]n(3)(here, op = o-phthalic anion, cyc = 1,1-cyclobutanedicarboxylic anion, pro = propanedioic anion). In cooperation with the auxiliary polycarboxylate co-ligands, a variety of Co(Ⅱ) coordination networks, such as 1-D chain 1 and 2-D layer 2 and 3 have been assembled. The magnetic behaviors of compounds 1～3 were studied. All of them indicated the existence of interesting spin-canting behavior.

关键词： Co(Ⅱ) complexes bent connector spin canting behavior

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Realizing interfacial coupled electron/ion transport through reducing the interfacial oxygen density of carbon skeletons for high-performance lithium metal anodes

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Journal of Energy Chemistry 2025年第2期101卷 744-750页

作者： yao-Lu Ye Yan Zhou Huan Ye fei-fei Cao College of Chemistry Huazhong Agricultural University Institute of Applied Mycology College of Plant Science and Technology Huazhong Agricultural University

Lithium plating/stripping occurs at the a node/electrolyte interface which involves the flow of electrons from the current collector and the migration of lithium ions from the solid-electrolyte interphase（SEI）.The dual continuous rapid transport of interfacial electron/ion is required for homogeneous Li ***,we propose a strategy to improve the Li metal anode performance by rationally regulating the interfacial electron density and Li ion transport through the SEI *** key technique involves decreasing the interfacial oxygen density of biomass-derived carbon host by regulating the arrangement of the celluloses precursor *** higher specific surface area and lower interfacial oxygen density decrease the local current density and ensure the formation of thin and even SEI film,which stabilized Li+transfer through the Li/electrolyte ***,the improved graphitization and the interconnected conducting network enhance the surface electronegativity of carbon and enable uninterruptible electron *** result is continuous and rapid coupled interfacial electron/ion transport at the anode/electrolyte reaction interface,which facilitates uniform Li deposition and improves Li anode *** Li/C anode shows a high initial Coulombic efficiency of 98% and a long-term lifespan of over 150cycles at a practical low N/P（negative-to-positive） ratio of 1.44 in full cells.

关键词： Cellulose Electron/ion conducting Interfacial oxygen density Lithium metal batteries Lithium-lean metal anodes

Insulin autoantibodies,D-dimer and microalbuminuria:A crosssectional,case-control study of type 2 diabetes

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World Journal of Diabetes 2025年第2期16卷 38-46页

作者： Lin-Shan Zhang peng Yu fei yao Zhi-Qiang Lu Xiao-Mu Li Hong Chen Department of Endocrinology Zhongshan HospitalFudan UniversityShanghai 200032China Department of Endocrinology Shanghai Geriatric Medical CenterShanghai 201104China Department of Endocrinology Fuzhou Hospital of Traditional Chinese MedicineFuzhou 350000Fujian ProvinceChina

BACKGROUND Type 2 diabetes mellitus(T2DM)often leads to vascular complications,such as *** role of insulin autoantibodies(IAA)and their interaction with D-dimer in this context remains *** To investigate the characteristics of IAA and its effect on albuminuria in T2DM *** We retrospectively analyzed clinical data from 115 T2DM patients with positive IAA induced by exogenous insulin,and 115 age-and sex-matched IAA-negative T2DM patients as *** scores were calculated using multivariate logistic *** variables were selected using the least absolute shrinkage and selection operator(LASSO)*** constructed a prediction model and analyzed the association between IAA and albuminuria based on demographic and laboratory *** The IAA-positive group had significantly higher D-dimer levels[0.30(0.19-0.55)mg/L vs 0.21(0.19-0.33)mg/L,P=0.008]and plasma insulin levels[39.1(12.0-102.7)μU/mL vs 9.8(5.5-17.6)μU/mL,P0.5 g/L)was 2.88(95%confidence interval:1.17-7.07)in the IAA-positive group(P interaction<0.05).CONCLUSION D-dimer elevation is an independent risk factor for abnormal albuminuria and interacts with IAA in the development of abnormal albuminuria in T2DM patients.

关键词： Insulin autoantibody Microalbuminuria D-dimer Type 2 diabetes

如何理解对于变系数波方程控制为必要工具的黎曼几何(英文)

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山西大学学报(自然科学版) 2012年第2期35卷 174-180页

作者：姚鹏飞中国科学院数学与系统科学研究院系统控制重点实验室

五十年来,变系数波方程的精确能控性一直是一个困难的问题,已经有许多文献把精确能控性转化为不可验证的假设,这些假设是不可验证的原因是能控性是全局性质,且经典的分析方法仅能很好地处理局部问题,而对全局问题不能和好地处理.微分几... 详细信息

五十年来,变系数波方程的精确能控性一直是一个困难的问题,已经有许多文献把精确能控性转化为不可验证的假设,这些假设是不可验证的原因是能控性是全局性质,且经典的分析方法仅能很好地处理局部问题,而对全局问题不能和好地处理.微分几何估计是十几年前引入的,目的是给出变系数波方程精确能控的可验证条件,从此在振动和结构动力系统的建模和控制问题取得许多重要进展,这里通过简单地黎几何估计和一些主要的方法,说明为什么它是给出精确能控性可验证条件的一个必要工具.

关键词：波方程黎曼度量能控性

Cu/TiO_(2)adsorbents modified by air plasma for adsorption-oxidation of H_(2)S

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Journal of Environmental Sciences 2025年第2期148卷 476-488页

作者： Yongqi Yan Xinyu Yang Ping Ning Chi Wang Xin Sun fei Wang peng Gao Kai Li Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries Kunming University of Science and TechnologyKunming 650500China Faculty of Chemical Engineering Kunming University of Science and TechnologyKunming 650500China City College Kunming University of Science and TechnologyKunming 650500China

In this study,non-thermal plasma(NTP)was employed to modify the Cu/TiO_(2)adsorbent to efficiently purify H_(2)S in low-temperature and micro-oxygen *** effects of Cu loading amounts and atmospheres of NTP treatment on the adsorption-oxidation performance of the adsorbents were *** NTP modification successfully boosted the H_(2)S removal capacity to varying degrees,and the optimized adsorbent treated by air plasma(Cu/TiO_(2)-Air)attained the best H_(2)S breakthrough capacity of 113.29 mg H_(2)S/gadsorbent,which was almost 5 times higher than that of the adsorbent without NTP *** studies demonstrated that the superior performance of Cu/TiO_(2)-Air was attributed to increased mesoporous volume,more exposure of active sites(CuO)and functional groups(amino groups and hydroxyl groups),enhanced Ti-O-Cu interaction,and the favorable ratio of active oxygen ***,the X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)results indicated the main reason for the deactivationwas the consumption of the active components(CuO)and the agglomeration of reaction products(CuS and SO_(4)^(2−))occupying the active sites on the surface and the inner pores of the adsorbents.

关键词： Non-thermal plasma(NTP) Surface modification Simultaneous adsorption-oxidation Cu/TiO_(2)(TiO_(2)loaded with copper) H_(2)S

磷酸改性γ-Al2O3催化葡萄糖转化5-羟甲基糠醛研究

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高校化学工程学报 2019年第4期33卷 1012-1017页

作者：杨凤丽姚鹏飞王树巍江苏理工学院化学与环境工程学院

在间歇搅拌反应釜中,以磷酸改性的γ-Al2O3作为固体酸催化剂,在水和仲丁醇组成的两相体系中对葡萄糖脱水制备生物基平台化合物5-羟甲基糠醛(5-hydroxymethylfurfural, HMF)进行研究。考察了磷酸浓度和催化剂用量对葡萄糖转化率和HMF收... 详细信息

在间歇搅拌反应釜中,以磷酸改性的γ-Al2O3作为固体酸催化剂,在水和仲丁醇组成的两相体系中对葡萄糖脱水制备生物基平台化合物5-羟甲基糠醛(5-hydroxymethylfurfural, HMF)进行研究。考察了磷酸浓度和催化剂用量对葡萄糖转化率和HMF收率的影响。结果表明,氧化铝未经磷酸改性时,催化葡萄糖转化HMF收率仅为18.1%,经1 mol·L^-1磷酸改性后,HMF收率可达34.1%。根据吡啶原位红外和程序升温热重分析结果可以得知,磷酸改性后γ-Al2O3催化剂表面出现Lewis酸位点,且γ-Al2O3稳定性增加,从而使其催化葡萄糖脱水制备HMF催化活性增强。该催化剂在含水体系中表现出良好的稳定性,催化剂重复使用四次后,活性基本不变。

关键词： Al2O3 5-羟甲基糠醛磷葡萄糖

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A Dibenzo-18-crown-6-based Symmetric Dual-coumarin Lead Ion Fluorescent Probe and Its Imaging in Living Cells

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Chemical Research in Chinese Universities 2025年第1期41卷 79-85页

作者： LIU Xiaolei GONG Chongzhen peng Xiujing SUN Guoxin yao Wei CHU Yongjie ZHANG Tianyon School of Chemical Engineering and Technology Tianjin UniversityTianjin300072P.R.China Institute for Smart Materials and Engineering School of Chemistry and Chemical EngineeringUniversity of JinanJinan250022P.R.China Key Laboratory of Molecular and Nano Probes Ministry of EducationShandong Normal UniversityJinan250014P.R.China Zaozhuang No.20 Middle School Zaozhuang277011P.R.China Shandong Zhongcheng Test and Testing Co. Ltd.Jinan250100P.R.China

Herein,a turn-on fluorescent probe for the detection of lead ions was developed using 7-diethylaminocoumarin as the fluorophore and dibenzo-18-crown-6 as the recognition *** response performance to lead ions was systematically *** probe showed specific selectivity and high sensitivity to lead ions,with fluorescence intensity at 496 nm increasing linearly with lead ion concentration(R^(2)=0.995)over the range of 1.0×10^(−7)–1.0×10^(−6)mol/L,and an LOD of 11.4 nmol/***’s plot revealed that the probe forms a 1:1 stoichiometry complex with lead ions during the recognition ***,the sensing mechanism of the probe was confirmed by density functional theory calculations,indicating that the recognition mechanism is based on photoinduced electron transfer(PET).The introduction of lead ions blocks PET,resulting in fluorescence ***,it was applied in the detection of practical water samples and bioimaging,demonstrating high application value in the field of chemosensors.

关键词： Coumarin Dibenzo-18-crown-6 Fluorescent probe Pb2+ Bioimaging

On the ionospheric response in the Taiwan region to Typhoon Meranti in September 2016

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Geodesy and Geodynamics 2025年第1期16卷 29-41页

作者： peng Chen Mingzhu Xiong Yibin yao Hao Chen Fucai Tang Liangcai Qiu Yuchen Zhang College of Geomatics Xi'an University of Science and Technology State Key Laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Science School of Geodesy and Geomatics Wuhan University Key Laboratory of Geospace Environment and Geodesy Ministry of Education Wuhan University

Previous studies have revealed that typhoons can affect the ionosphere. This paper uses GNSS observations provided by GNSS tracking stations of Taiwan region, ERA5 gravity wave dissipation products,and Himawari-8 band 07 brightness temperature observation data to analyze the impact of Typhoon Meranti on Taiwan region's ionosphere from September 13 to 15, 2016. In addition to the daily effects of traveling ionospheric disturbances(TIDs), TIDs of various intensities caused by Meranti-induced gravity waves were observed during this period, which is inseparable from the state of the typhoon and the topographic features during its progress. The ionospheric disturbance caused by the edge of a typhoon is usually larger than that at the typhoon eye. When the typhoon approached Taiwan region with high intensity on September 14, it was observed that the gravity waves caused by the typhoon had a wavelength of about 174-293 km, a period of 13.5-23.5 min, and a propagation speed of 142-302 m/s. When the vortex structure of a typhoon interacts with complex surfaces such as mountains, it is easier to excite more medium-scale gravity waves. The origin that excites gravity waves and causes ionospheric anomalies is different from the location of the typhoon eye and changes over time. The gravity waves caused by the typhoon lasted for three days in the central mountains of Taiwan region. Still, background wind conditions restricted the propagation of gravity waves from the mesosphere to the thermosphere and led to TID predominantly concentrated between 06:00 and 13:00 UT each day.

关键词： Typhoon GNSS TEC TID Gravity waves