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Towards high-performance anodes:Design and construction of cobalt-based sulfide materials for sodium-ion batteries

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Journal of Energy Chemistry 2021年第3期30卷 680-698页

作者： Baole guan si-Yu Qi Ying Li Ting Sun Yan-Guo Liu Ting-Feng Yi Department of Chemistry College of SciencesNortheastern UniversityShenyang 110819LiaoningChina School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004HebeiChina Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004HebeiChina Institute of Advanced Electrochemical Energy&School of Materials Science and Engineering Xi’an University of TechnologyXi’an 710048ShaanxiChina

Sodium-ion batteries are increasingly becoming important in the energy storage field owing to their low cost and high natural abundance of ***-based sulfide materials have been extensively studied as anode materials owing to their remarkable Na storage ***,the application of cobalt-based sulfides is hampered by their serious capacity degradation and unsatisfactory cycling stability due to severe structural changes during ***,it is important to comprehensively summarize advances in the understanding and modification of cobalt-based sulfides from various *** the present review,recent advances on various cobalt-based sulfides,such as CoS,CoS_(2),Co_(3)S_(4),Co_(9)S_(8),NiCo_(2)S_(4),CUCo_(2)S_(4),and SnCoS_(4),are outlined with particular attention paid to strategies that improve their sodium storage ***,the mechanisms of charge storage are ***,the key barriers to their extensive application and corresponding strategies for designing high-performance cobalt-based sulfide anode materials are ***,key developments are summarized and future research directions are proposed based on recent advancements,aiming to offer possible fascinating strategies for the future promotion of cobalt-based sulfides as anode materials applied in sodium-ion batteries.

关键词： Cobalt sulfides Sodium-ion battery Anode material nanoengineering

A method to evaluate the bioactive function of fruit extracts of Chinese wild Citrus with microtubular activity

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Journal of Integrative Agriculture 2017年第4期16卷 867-873页

作者： guan Xin TAN si Günther Buchholz Peter Nick ZHOU Zhi-qin College of Horticulture and Landscape Architecture Southwest University Chongqing 400716 P.R. China Molecular Cell Biology Botanical Institute Karlsruhe Institute of Technology Karlsruhe D-76128 Germany RLP AgroScience/AIPlanta-institute for Plant Research Neustadt an der Weinstrasse D-67435 Germany Laboratoire Vigne Biotechnologies et Environnement EA-3991 Universit6 de Haute-Alsace Colmar 68000 France Key Laboratory of Horticulture Science for Southern Mountainous Regions Ministry of Education Chongqing 400716 P.R. China

China is one of the most important centers of origin for Citrus genetic resources. Due to the high content of secondary metabolites, mining wild Chinese Citrus for novel medical applications is promising. In this study, extracts of Chinese wild species from different taxonomical groups were screened for potential effects on microtubules （MTs） in vitro. MT density as a readout for nucleation, and frequency distribution over MT lengths as a readout for elongation and decay were determined by quantitative image analysis via a standardized coverslJp assay using fluorescently labelled neurotubulin. Extract from peels of Citrus ichangensis Swing. strongly increased the density of MTs; whereas, extract from peels of Cfurs limon （L.） Burm.f. exerted the opposite effect. Extract from pulp of Citrus limonia Osbeck promoted MT elongation, and in addition induced a small population of very long MTs. These data suggest that wild Chinese Citrus harbour compounds that act specifically on different aspects of MT nucleation, elongation, and decay.

关键词： fruit extract natural product-based pharmaceuticals Chinese wild Citrus microtubules secondary plant metabolites

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耐心资本对企业ESG表现的影响研究

经济问题 2025年第1期 48-56页

作者：李思飞温磊北京外国语大学国际商学院北京100089

随着ESG理念的逐渐流行,如何提升企业的ESG表现成为社会公众关注的焦点。耐心资本提倡长期的投资理念,与ESG理念相契合,可能成为促进企业ESG表现提升的重要引擎。为此,基于2009—2022年A股上市公司的样本,实证检验了耐心资本对企业ESG... 详细信息

随着ESG理念的逐渐流行,如何提升企业的ESG表现成为社会公众关注的焦点。耐心资本提倡长期的投资理念,与ESG理念相契合,可能成为促进企业ESG表现提升的重要引擎。为此,基于2009—2022年A股上市公司的样本,实证检验了耐心资本对企业ESG表现的影响。研究发现:耐心资本能够促进企业ESG表现提升。机制检验发现,代理成本、融资约束和信息不对称是耐心资本影响企业ESG表现的重要机制;异质性分析发现,耐心资本对分析师关注度高、媒体关注度高以及属于重点污染监控单位的企业ESG表现具有更明显的提升效应;分项检验发现,耐心资本主要促进了企业社会和公司治理表现提升,对于企业环境表现则没有显著影响。研究结论对于培育和壮大耐心资本、促进企业ESG表现提升具有重要的参考价值。

关键词：耐心资本企业ESG表现信息不对称融资约束代理成本

Magnetic properties of a mixed spin-3/2 and spin-2 Ising octahedral chain

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Chinese Physics B 2022年第8期31卷 598-604页

作者： Xiao-Chen Na nan si Feng-Ge Zhang Wei Jiang School of Science Shenyang University of TechnologyShenyang 110870China School of Environmental and Chemical Engineering Shenyang University of TechnologyShenyang 110870China School of Electric Engineering Shenyang University of TechnologyShenyang 110870China

Using an effective field theory with correlations, magnetic properties of an octahedral chain described by a mixed spin Ising model are investigated. Unique phenomena such as multiple hysteresis loops, saturation magnetization, and reverse flip of the magnetization plateaus occur when certain typical parameters are applied. These results may be helpful to further investigate the magnetic properties of one-dimensional systems and could potentially be utilized in the design of spin devices.

关键词： octahedral chain magnetization plateaus hysteresis loops blocking temperature

Dynamic mechanical behavior of ultra-high strength steel 30CrMnsiNi2A at high strain rates and elevated temperatures

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Journal of Iron and Steel Research International 2017年第7期24卷 724-729页

作者： Qiu-lin Niu Wei-wei Ming Ming Chen si-wen Tang Peng-nan Li College of Mechanical and Electrical Engineering Hunan University of Science and Technology Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material Hunan University of Science and Technology School of Mechanical Engineering Shanghai Jiao Tong University

During high speed machining in the field of manufacture,chip formation is a severe plastic deformation process including large strain,high strain rate and high *** the strain rate in high speed cutting process can be achieved to 105 s^（-1）.30CrMnsiNi2Asteel is a kind of important high-strength low-alloy structural steel with wide application *** the dynamic mechanical properties of30CrMnsiNi2Aunder the conditions of high strain rate and high temperature is necessary to construct the constitutive relation model for high speed *** dynamic compressive mechanical properties of30CrMnsiNi2Asteel were studied using split Hopkinson pressure bar（SHPB）tests at 30-700°C and3000-10000s^（-1）.The stress-strain curves of 30CrMnsiNi2Asteel at different temperatures and strain rates were investigated,and the strain hardening effect and temperature effect were *** results show that 30CrMnsiNi2Ahas obvious temperature sensitivity at 300°***,the flow stress decreased significantly with the increase of *** strain hardening effect of the material at high strain rate is not significant with the increase of *** strain rate hardening effect is obvious with increasing the *** to the experimental results,the established Johnson-Cook（J-C）constitutive model of 30CrMnsiNi2Asteel could be used at high strain rate and high temperature.

关键词： 30CrMnsiNi2A steel Dynamic mechanical behavior Split Hopkinson pressure bar High temperature High strain rate Ultra-high strength steel

Two-dimensional finite element mesh generation algorithm for electromagnetic field calculation

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Chinese Physics B 2021年第1期30卷 118-125页

作者： Chun-Feng Zhang Wei Wang si-guang An nan-Ying Shentu Department of Mechanical and Electrical Engineering China Jiliang UniversityHangzhou 310016China

Two-dimensional finite element mesh generation algorithm for electromagnetic field calculation is proposed in this paper to improve the efficiency and accuracy of electromagnetic calculation. An image boundary extraction algorithm is developed to map the image on the geometric domain. Identification algorithm for the location of nodes in polygon area is proposed to determine the state of the node. To promote the average quality of the mesh and the efficiency of mesh generation, a novel force-based mesh smoothing algorithm is proposed. One test case and a typical electromagnetic calculation are used to testify the effectiveness and efficiency of the proposed algorithm. The results demonstrate that the proposed algorithm can produce a high-quality mesh with less iteration.

关键词： mesh generation smoothing function finite element electromagnetic calculation

Synthesis and electrochemical properties of Li FePO_(4) cathode material by ionic thermal method using eutectic mixture of tetramethyl ammonium chloride-urea

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Rare Metals 2021年第12期40卷 3477-3484页

作者： si-nan Li Shao-Hua Luo Liu Yang Qing Wang Ya-Hui Zhang Xin Liu School of Materials Science and Engineering Northeastern UniversityShenyang 110819China School of Resources and Materials Northeastern University At QinhuangdaoQinhuangdao 066004China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004China

In this study, the LiFePO_(4) cathode was synthesized by the ionic thermal method using the deep eutectic mixture of tetramethyl ammonium chloride and urea. The synthetic conditions were systematically investigated by orthogonal experiments, which indicate that the optimal reaction time, reaction temperature, molar ratio of Li to DES and rotate speed are 96 h, 220 ℃, 1:14 and20 r·min^(-1), respectively. X-ray diffraction(XRD), scanning electron microscope(SEM) and transmission electron microscope(TEM) were characterized to investigate the crystalline structure and morphology of the obtained materials, indicating well-crystallized LiFePO_(4) with olivine structure. And the physical properties of LiFePO_(4) were explored through Fourier transform infrared spectroscopy(FTIR),57 Fe Mo¨ ssbauer absorption spectra and Raman spectra. An initial discharge capacity can reach 151 m Ah·g^(-1) at 0.1 C rate for LiFePO_(4) following by calcining at 600 ℃ under the optimal conditions, and it retains 125.1 m Ah·g^(-1) after 100 cycles. These results demonstrated that the addition of ionic liquids can improve the rate performance, cycle performance and ion diffusion rate of LiFePO_(4).

关键词： LiFePO_(4) Deep eutectic solvents Ionic thermal method Orthogonal experiments Electrochemical performance

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公平竞争审查、新质生产力与企业数字化转型

经济问题 2025年第1期 1-14页

作者：师博郭思琪南京大学数字经济与管理学院江苏苏州215163 西北大学经济管理学院陕西西安710127

数字经济是新质生产力的综合质态。公平竞争审查制度作为高水平社会主义市场经济体制的重要组成部分,能够激发企业创新活力和数字化转型动力,从而推动新质生产力发展。采用双重差分法评估公平竞争审查制度对上市公司数字化转型的影响。... 详细信息

数字经济是新质生产力的综合质态。公平竞争审查制度作为高水平社会主义市场经济体制的重要组成部分,能够激发企业创新活力和数字化转型动力,从而推动新质生产力发展。采用双重差分法评估公平竞争审查制度对上市公司数字化转型的影响。研究发现,该制度能够显著提升行政垄断程度高地区的企业数字化转型水平,并且以促进“底层技术运用”为支点撬动了企业数字化转型,凸显了竞争政策的基础性作用。机制检验表明,公平竞争审查制度能够通过促进创新要素流动、优化信贷资源配给、完善数字发展制度环境打通束缚新质生产力发展的“堵点”和“卡点”,从而驱动企业数字化转型。围绕公平竞争审查标准、方式和目标的异质性分析发现,政策呈现出对民营企业、较小规模企业的所有制和规模“偏好”,并且对于制度性交易成本较高的企业作用更加明显;地区自我审查与外部监督机制较为完善时,政策能够更好发挥作用。最后产业政策的叠加效果检验显示,中央与省级产业政策均与公平竞争审查形成了制度合力,有效市场和有为政府协同推进了企业数字化进程。研究结论能够为公平竞争审查制度促进各类先进生产要素向发展新质生产力集聚提供理论支撑和实证依据。

关键词：高质量发展高水平社会主义市场经济体制数字经济行政性垄断

State-Vector Space and Canonical Coherent States in Noncommutative Plane

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Communications in Theoretical Physics 2006年第2期45卷 249-254页

作者： JING si-Cong TAO Ling-Ping LIU Qiu-Yu RUAN Tu-nan Department of Modern Physics University of Science and Technology of China Hefei 230026 China

The structure of the state-vector space of identical bosons in noncommutative spaces is investigated. To maintain Bose-Einstein statistics the commutation relations of phase space variables should simultaneously include coordinate-coordinate non-commutativity and momentum-momentum non-commutativity, which leads to a kind of deformed Heisenberg-Weyl algebra. Although there is no ordinary number representation in this state-vector space, several set of orthogonal and complete state-vectors can be derived which are common eigenvectors of corresponding pairs of commuting Hermitian operators. As a simple application of this state-vector space, an explicit form of two-dimensional canonical coherent state is constructed and its properties are discussed.

关键词： noncommutative space state-vector space coherent state