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When graphite meets Li metal

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National Science Review 2020年第10期7卷 1521-1522页

作者： yu ding Guihua yu Materials Science and Engineering Program and Department of Mechanical Engineering The University of Texas at Austin

Wetting, indicating the ability of a liquid to spread out over solid surfaces,is of vital importance in addressing the scientific issues related to energy and environment technologies. The study of wetting encompasses the academic disciplines of surface chemistry, nanotechnology, materials science and energy *** past several decades have witnessed significant progress in achieving desirable wetting performance with water,

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Equivalent linear model for seismic damage evaluation of single-degree-of-freedom systems representing reinforced concrete structures considering cyclic degradation behavior

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Earthquake Engineering and Engineering Vibration 2024年第3期23卷 637-648页

作者： Lulu Yan ding-Hao yu Research Center for Geotechnical and Structural Engineering Technology of Liaoning Province Dalian UniversityDalian116622China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

In this study,a novel equivalent damping ratio model that is suitable for reinforced concrete(RC)structures considering cyclic degradation behavior is developed,and a new equivalent linearization analysis method for implementing the proposed equivalent damping ratio model for use in seismic damage evaluation is *** this end,Ibarra’s peak-oriented model,which incorporates an energy-based degradation rule,is selected for representing hysteretic behavior of RC structure,and the optimized equivalent damping for predicting the maximum displacement response is presented by using the empirical method,in which the effect of cyclic degradation is ***,the relationship between the hysteretic energy dissipation of the inelastic system and the elastic strain energy of the equivalent linear system is established so that the proposed equivalent linear system can be directly integrated with the Park-Ang seismic model to implement seismic damage *** to the simplicity of the equivalent linearization method,the proposed method provides an efficient and reliable way of obtaining comprehensive insight into the seismic performance of RC *** verification demonstrates the validity of the proposed method.

关键词： degrading system equivalent linear system equivalent damping seismic damage RC structures

An Analytical Solution for Nearshore Circulation Driven by Focused/Defocused Waves

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China Ocean Engineering 2019年第5期33卷 544-553页

作者： ding yu-mei SHI Fengyan School of Science Tianjin University of Science and Technology Tianjin 300475 China Center for Applied Coastal Research Department of Civil and Environmental Engineering University of Delaware Newark 19716 USA

An offshore shoal or bar refracts ocean surface waves and causes wave focusing/defocusing on the adjacent beach. Wave focal patterns characterized by alongshore variations in wave height, wave angle, and breaking location induce alongshore non-uniformities of wave setup and nearshore circulation, e.g., rip currents and alongshore currents, in the surfzone. A simplified analytic model for nearshore circulation generated by focused/defocused waves on a planar beach is developed and theoretical solutions are obtained using transport stream function and perturbations in alongshore distributions of wave height and wave angle at the breaker line. The analytic model suggests that alongshore currents are strongly affected by a pair of counter-rotating vortices generated shoreward of the wave focal zone. The vortices are persistent, and their strengths depend on the amplitudes of alongshore variations in wave height and wave angle. The alongshore gradient in wave height tends to intensify the vortices while the convergence of wave angle tends to weaken the vortices. Divergent flows associated with the vortices in the surfzone are intense, strengthening alongshore currents in the downstream of the wave focal zone and weakening alongshore currents or causing flows reversal in the upstream. Alongshore currents are modulated by rip currents associated with the wave focusing/defocusing patterns.

关键词： wave focusing and defocusing nearshore circulation rip current alongshore current analytical solution

STRENGTH CRITERION FOR PLAIN CONCRETE UNDER MULTIAXIAL STRESS BASED ON DAMAGE POISSON’S RATIO

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Acta Mechanica Solida Sinica 2006年第4期19卷 307-315页

作者： ding Faxing yu Zhiwu School of Civil Engineering and Architecture Central South University Changsha 410075 China

A new unified strength criterion in the principal stress space has been proposed for use with normal strength concrete （NC） and high strength concrete （HSC） in compressioncompression-tension, compression-tension-tension, triaxial tension, and biaxial stress states. The study covers concrete with strengths ranging from 20 to 130 MPa. The conception of damage Poisson＇s ratio is defined and the expression for damage Poisson＇s ratio is determined basically. The failure mechanism of concrete is illustrated, which points out that damage Poisson＇s ratio is the key to determining the failure of concrete. Furthermore, for the concrete under biaxial stress conditions, the unified strength criterion is simplified and a simplified strength criterion in the form of curves is also proposed. The strength criterion is physically meaningful and easy to calculate, which can be applied to analytic solution and numerical solution of concrete structures.

关键词： plain concrete high strength concrete multiaxial stress strength criterion meridian deviatoric plan

Conductive polymers for stretchable supercapacitors

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Nano Research 2019年第9期12卷 1978-1987页

作者： Yaqun Wang yu ding Xuelin Guo Guihua yu Country College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China Materials Science and Engineering Program and Department of Mechanical Engineering The University of Texas at AustinTX 78712USA

Stretchable energy storage devices,maintaining the capability of steady operation under large mechanical strain,have become increasing more important with the development of stretchable electronic *** supercapacitors(SSCs),with high power density,modest energy density,and superior mechanical properties are regarded as one of the most promising power supplies to stretchable electronic *** polymers,such as polyaniline(PANI),polypyrrole(PPy),polythiophene(PTh)and poly(3,4-ehtylenedioxythiophene)(PEDOT),are among the well-studied electroactive materials for the construction of SSCs because of their high specific theoretical capacity,excellent electrochemical activity,light weight,and high *** effort has been devoted to developing stretchable,conductive polymer-based SSCs with different device structures,such as sandwich-type and fiber-shaped type *** review summarizes the material and structural design for con ductive polymer-based SSCs and discusses the challenge and importa nt di recti ons in this emergi ng field.

关键词： conductive polymer stretchable supercapacitor pseudocapacitive energy storage

Low-temperature synthesis of sp^2 carbon nanomaterials

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Science Bulletin 2019年第24期64卷 1817-1829页

作者： yu ding Mengqi Zeng Lei Fu College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072China The Institute for Advanced Studies Wuhan UniversityWuhan 430072China

sp^2 carbon nanomaterials are mainly composed of sp^2-hybridized carbon atoms in the form of a hexagonal network. Due to the p bonds formed by unpaired electrons, sp^2 carbon nanomaterials possess excellent electronic, mechanical, and optical properties, which have attracted great attention in recent *** the advanced sp^2 carbon nanomaterials, graphene and carbon nanotubes(CNTs) have great potential in electronics, sensors, energy storage and conversion devices, etc. The low-temperature synthesis of graphene and CNTs are indispensable to promote the practical industrial application. Furthermore, graphene and CNTs can even be expected to directly grow on the flexible plastic that cannot bear high temperature,expanding bright prospects for applications in emerging flexible nanotechnology. An in-depth understanding of the formation mechanism of sp^2 carbon nanomaterials is beneficial for reducing the growth temperature and satisfying the demands of industrial production in an economical and low-cost way. In this review, we discuss the main strategies and the related mechanisms in low-temperature synthesis of graphene and CNTs, including the selection of precursors with high reactivity, the design of catalyst, and the introduction of additional energy for the pre-decomposition of precursors. Furthermore, challenges and outlooks are highlighted for further progress in the practical industrial application.

关键词： Low-temperature synthesis sp^2 carbon nanomaterials Graphene Carbon nanotubes

Synthesis and Crystal Structure of the Complex [Zn(DBSHSH)(py)_2]

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Chinese Journal of Structural Chemistry 2006年第11期25卷 1347-1350页

作者： ding yu ZHANG Zhong-Hai yu Guo-Feng Department of Chemistry Xiaogan University Xiaogan Hubei 432000 China

The title complex, C24H18Br2N4ZnO3, has been prepared and characterized by X- ray diffraction analysis. It crystallizes in the triclinic system, space group PI^- with α = 0.89000（11）, b = 1.22172（14）, c= 1.31342（16）nm, a = 101.696（2）, β = 103.519（2）, γ = 110.744（2）°, V= 1.2329（3） nm^3, Z = 2, Mr = 635.61, F（000） = 628, Dc= 1.712 g/cm^3 and μ（MoKa） = 4.270 mm^-1. The structure was refined to the final R = 0.0524 and wR = 0.1239 for 2763 observed reflections with I 〉 2σ（ I）. The X-ray crystal structure analysis revealed that the center zinc（Ⅱ） is bonded with two oxygen and one nitrogen atoms from a tridentate ligand 3,5-dibromo-salicylaldehyde salicyloylhydrazone （DBSHSH） and two nitrogen atoms from two solvent pyridine molecules to form a distorted five-coordinate trigonal bipyramid. The intramolecular hydrogen bonds in the crystal structure play an important role in the title complex＇s thermostability.

关键词： 3,5-dibromo-salicylaldehyde salicyloylhydrazone [Zn(DBSHSH)(py)2] crystal structure

A Novel Starting Impulse Suppression Method for Active Power Filter Based on Slowly Rising Curve

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Energy Engineering 2021年第6期118卷 1839-1853页

作者： Jianfeng Yang yu ding School of Automation and Electrical Engineering Lanzhou Jiaotong UniversityLanzhou730070China

With the widespread application of power electronic equipment in the power grid,the harmonic problem of the power grid becomes more pronounced,reducing the efficiency of power production,transmission,and utilization,and interfering with the normal operation of the power *** on the requirements of harmonic suppression and power system protection,a shunt active power filter(SAPF)is proposed as an effective harmonic suppression ***,there are problems with impulse current and impulse voltage in the starting process of *** current and impulse voltage cause the power grid and switchgear to bear greater current stress and voltage stress,which seriously affect the security and reliability of the power grid and may damage the *** effectively solve the problem of impulse current and impulse voltage,the starting process of SAPF is divided into the uncontrolled rectification stage and the transition *** mathematical model of the DC side of APF is *** causes of impulse current and impulse voltage in the uncontrolled rectifier and transition phases are *** introducing voltage square,a new starting impulse suppression strategy of active power filter based on the slow rising curve is proposed,fundamentally solving the problems of impulse current and impulse *** results verify the effectiveness and feasibility of this method.

关键词： Shunt active power filter starting shock impulse current impulse voltage

生态产品价值实现的研究热点与展望——基于CiteSpace的可视化分析

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南宁师范大学学报(自然科学版) 2025年第1期42卷 13-24页

作者：王惠琴丁雨晨南宁师范大学经济与管理学院

自“绿水青山就是金山银山”理念提出以来，生态产品价值实现备受关注，研究文献数量迅速增长，研究内容聚焦将生态产品价值转化为社会经济发展财富和国家竞争优势。运用CiteSpace软件对2017—2024年生态产品价值实现研究的发文时间分... 详细信息

自“绿水青山就是金山银山”理念提出以来，生态产品价值实现备受关注，研究文献数量迅速增长，研究内容聚焦将生态产品价值转化为社会经济发展财富和国家竞争优势。运用CiteSpace软件对2017—2024年生态产品价值实现研究的发文时间分布、发文作者、高频关键词聚类和突现词进行可视化分析，同时结合内容分析法总结近年生态产品价值实现研究的热点方向、主要进展和发展趋势。研究发现：近年来，生态产品价值实现相关文献数量呈现爆发式增长趋势；对生态产品价值的分类与核算，生态产品价值实现的路径、模式、典型案例分析、面临的挑战和存在的问题等的基础研究渐趋成熟；“乡村振兴”“共同富裕”是推动生态产品价值实现的关键抓手和主攻方向；制度体系构建是生态产品价值实现的有力保障；“生态补偿”和“实现路径”成为学界研究的重点和热点。未来研究的可能趋势包括：探索生态产品价值实现与资产证券化的内在联系、生态产品价值实现效益、生态产品价值实现实证研究，以及关注生态产品价值实现的时政热点。

关键词：生态产品价值实现可视化分析乡村振兴共同富裕

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