网络安全视域下我国新时代加强数据主权机制建设论析

当前,欧盟通过数据国家主义消融个人权利,美国利用“长臂管辖”策略推行霸权主义,这都恶意破坏了他国数据主权的独立性、自主性和平等性。新时代下为进一步加强和完善网络安全系统,我国亟须加强数据主权机制建设,即以数据分类分级机制建构数据主权整体性、以数据跨境流动管理机制保障数据主权可控性、以数据风险防范机制加强数据主权保密性、以数据跨境流动协同机制强化数据主权规范性。

高质量发展背景下品牌研究热点与趋势分析——基于CiteSpace的可视化分析

根据文献的内部与外部特征,对高质量发展背景下品牌研究热点与趋势进行分析。研究发现,研究合作关系松散,但主题紧密契合实践背景,呈现蓬勃发展的态势。未来应重点围绕在双碳、农文旅融合、新发展格局的背景下、以共同富裕为目标的品牌建设进行研究。

Vacancy engineering mediated hollow structured ZnO/ZnS S-scheme heterojunction for highly efficient photocatalytic H_(2) production

Designing a step-scheme(S-scheme)heterojunction photocatalyst with vacancy engineering is a reliable approach to achieve highly efficient photocatalytic H_(2)production activity.Herein,a hollow ZnO/ZnS S-scheme heterojunction with O and Zn vacancies(VO,Zn-ZnO/ZnS)is rationally constructed via ion-exchange and calcination treatments.In such a photocatalytic system,the hollow structure combined with the introduction of dual vacancies endows the adequate light absorption.Moreover,the O and Zn vacancies serve as the trapping sites for photo-induced electrons and holes,respectively,which are beneficial for promoting the photo-induced carrier separation.Meanwhile,the S-scheme charge transfer mechanism can not only improve the separation and transfer efficiencies of photo-induced carrier but also retain the strong redox capacity.As expected,the optimized VO,Zn-ZnO/ZnS heterojunction exhibits a superior photocatalytic H_(2) production rate of 160.91 mmol g^(-1)h^(-1),approximately 643.6 times and 214.5 times with respect to that obtained on pure ZnO and ZnS,respectively.Simultaneously,the experimental results and density functional theory calculations disclose that the photo-induced carrier transfer pathway follows the S-scheme heterojunction mechanism and the introduction of O and Zn vacancies reduces the surface reaction barrier.This work provides an innovative strategy of vacancy engineering in S-scheme heterojunction for solar-to-fuel energy conversion.

绿色金融促进中国产业结构升级的实证研究

加快产业结构优化升级是促进经济高质量发展的重要抓手,绿色金融的发展能够优化资金配置,对产业结构升级产生重要影响。基于我国2010—2021年30个省份的面板数据,采用双向固定效应模型探究绿色金融对产业结构升级的影响,构建中介效应模型探究技术进步是否发挥了中介作用。结果表明:绿色金融对产业结构升级具有明显的促进作用,技术进步在绿色金融影响产业结构升级的过程中起到部分中介作用。

聚焦课程思政 践行立德树人——无机及分析化学思政教学初探

课程思政是新时代教育改革背景下提出的创新教育理念,是落实立德树人根本任务的重要举措。无机及分析化学蕴含爱国情怀、奋进斗志、环保理念、意志品格和科创精神等思政教育元素,有利于开展课程思政教学与改革。本文通过重塑教学目标、梳理思政内容、优化教学方法、开辟第二课堂等手段,深入挖掘课程中蕴含的思政元素,并对无机及分析化学教学中实施课程思政进行了探索和实践。深入践行立德树人,提高育人质量和水平。

牡丹籽油的研究进展及应用

牡丹籽油中不饱和脂肪酸含量高达92%,其中α-亚麻酸的含量为40%左右,远高于其他食用植物油。综述牡丹籽油的研究进展,分析油用牡丹的综合利用价值,展望牡丹籽油的开发前景,以期为进一步研究和开发牡丹籽油产品提供依据。

Ti_(3)C_(2) MXene co-catalyst assembled with mesoporous TiO_(2) for boosting photocatalytic activity of methyl orange degradation and hydrogen production

Photocatalytic degradation and hydrogen production using solar energy through semiconductor photocatalysts are deemed to be a powerful approach for solving environmental and energy crisis.However,the biggest challenge in photocatalysis is the efficient separation of photo-induced carriers.To this end,we report that the mesoporous TiO_(2)nanoparticles are anchored on highly conductive Ti_(3)C_(2)MXene co-catalyst by electrostatic self-assembly strategy.The constructed mesoporous TiO_(2)/Ti_(3)C_(2)composites display that the mesoporous TiO_(2)nanoparticles are uniformly distributed on the surface of layer structured Ti_(3)C_(2)nanosheets.More importantly,the as-obtained mesoporous TiO_(2)/Ti_(3)C_(2)composites reveal the significantly enhanced light absorption performance,photo-induced carriers separation and transfer ability,thus boosting the photocatalytic activity.The photocatalytic methyl orange degradation efficiency of mesoporous TiO_(2)/Ti_(3)C_(2)composite with an optimized Ti_(3)C_(2)content(3 wt%)can reach 99.6%within 40 min.The capture experiments of active species confirm that the·O_(2)-and·OH play major role in photocatalytic degradation process.Furthermore,the optimized mesoporous TiO_(2)/Ti_(3)C_(2)composite also shows an excellent photocatalytic H2 production rate of 218.85μmol g^(-1)h^(-1),resulting in a 5.6 times activity as compared with the pristine mesoporous TiO_(2)nanoparticles.This study demonstrates that the MXene family materials can be applied as highly efficient noble-metal-free co-catalysts in the field of photocatalysis.

高校实验室安全防护工作对策研究

在高校教学过程中,实验教学是其重要的教学环节,对培养具有动手能力的科研型人才具有重要作用.因此,实验室是高校重要的教学场所.目前,高校实验室安全防护工作存在很多疏漏与不足,给高校实验室安全和学生的生命健康安全造成巨大安全隐患.针对高校实验室安全防护工作中存在的问题,制定相应的工作对策,以建设更加安全的高校实验室,为学生创造更加安全的实验环境,以更好地培养人才.

Microstructure and electrical conductivity of electroless copper plating layer on magnesium alloy micro-arc oxidation coating

In order to impart electrical conductivity to the magnesium alloy micro-arc oxidation(MAO)coating,the electroless copper plating was performed.Effects of plating temperature and complexing agent concentration on the properties of the electroless copper plating layers were studied by measuring their microstructure,corrosion resistance and electrical conductivity.It was found that the optimized plating temperature was 60°C,and the most suitable value of the complexing agent concentration was 30 g/L.Under this condition,a complete and dense plating layer could be obtained.The formation mechanism of the plating layer on magnesium alloy MAO coating was analyzed.A three-stage model of the plating process was proposed.The square resistance of the plated specimen was finally reduced to 0.03Ω/□after the third stage.Through electroless copper plating,the MAO coated sample obtained excellent electrical conductivity without significantly reducing its corrosion resistance.

Evaluation of residual stress and corrosion behaviour of electroless plated Ni-P/Ni-Mo-P coatings

Single Ni-P and Ni-Mo-P coatings as well as duplex Ni-P/Ni-Mo-P coatings with the same compositions were prepared by electroless plating.The residual stresses of the coatings on the surface and cross sections were measured by nanoindentation and AFM analysis,and the corrosion behaviour of the coatings in10%HCl solution was evaluated by electrochemical methods,to establish the correlation between the residual stresses and corrosion behaviour of the coatings.The results showed that the single Ni-P and duplex Ni-P/Ni-Mo-P coatings presented residual compressive stresses of241and206MPa respectively,while the single Ni-Mo-P coating exhibited a residual tensile stress of257MPa.The residual compressive stress impeded the growth of the pre-existing porosity in the coatings,protecting the integrity of the coating.The duplex Ni-P/Ni-Mo-P coatings had better corrosion resistance than their respective single coating.In addition,the stress states affect the corrosive form of coatings.

Effects of punch velocity on microstructure and tensile properties of thixoforged Mg2Sip/AM60B composite

The effects of punch velocity on the microstructures and tensile properties of Mg2 Sip/AM60 B composite were investigated.In comparison,the tensile properties of the permanent mold casting of this composite were also analyzed.The results indicate that the punch velocity obviously influences the microstructure through changing the secondary solidification behaviors and semisolid deformation mechanisms.The variations of the microstructures and deformation mechanisms are responsible for the changes in tensile properties and fracture modes of the composites.The best comprehensive tensile properties of this composite are obtained under the punch velocity of 60 mm/s.The resulting ultimate tensile strength and elongation of the composite are found to be 198 MPa and 10.2%,respectively.The excellent tensile properties of the thixoforged composite are ascribed to the elimination of porosities and the work hardening.

儿童美术教育的创新模式探究

罗恩菲尔德认为,艺术教育是一种方法,而不是为了达成某一种目标。儿童美术教育作为儿童教育的重要组成部分,对儿童的身心发育及智力发展都有极为重要的影响,系统、科学、完善的儿童美术教育在提升儿童审美情趣、开发想象力及创造力、锻炼儿童观察能力、提升发散思维、培养健全人格等多方面均有重要作用。近年来,我国儿童美术教育水平逐步提升,但依然存在教育发展水平不平衡、教育方法陈旧、教育评定方式不科学等问题。该文通过研究儿童教育现状,寻找现阶段儿童美术教育存在的问题,探讨适当的解决路径。

Rhizoma polygonati from Mount Tai:nutritional value and usefulness as a traditional Chinese medicine,source of herbzyme,and potential remediating agent for COVID-19 and chronic and hidden hunger

Recently,traditional Chinese medicine-based treatment has succeeded in fighting coronavirus disease 2019(COVID-19),and Rhizoma polygonati(Huangjing)has been one of the recommended components.Its processed products play antidiabetic,antiviral,antitumor,antioxidation,antifatigue,antiaging,and immune enhancement roles.The climate in Mount Tai is mild,and the dense forest is suitable for the growth of Rhizome polygonati,which has gradually evolved into a unique specie.Considering the important medicinal value and pleasant taste of Mount Tai-Rhizoma polygonati,various healthy and functional food products,controlled by quality markers with anti-COVID-19 potential,as well as emergency foods can be developed.The study aimed to review current evidence on the nutritional value of Rhizoma polygonati from Mount Tai and its usefulness as a traditional Chinese medicine,source of herbzyme,and potential remediating agent for COVID-19 and food shortage.Most recent findings regarding herbal nanomedicine have revealed that nanoscale chemical compounds are potentially efficient in drug delivery or nanozyme catalysis upon bioprocessing.Nanoflower structure is found in processed Rhizoma polygonati by self-assembly and has wide application in enzymatic events,particularly nanoscale herbzyme.The novel findings regarding Mount Tai-Rhizoma polygonati could enhance its novel applications in chronic and hidden hunger,clinical nanomedicine,and as an anti-COVID-19 agent.

科教融合理念下自动化专业人才培养创新模式探讨

自动化专业是信息行业的宽口径专业,理论知识抽象,科研实践操作能力的要求高。为培养出合格人才,根据学校特色,把教学和科研、知识创新和文化传承、创新能力和教书育人结合起来,在科教融合的理念下,通过多种途径探索本专业的人才培养新模式。

传统文化在包装设计中的体现

包装设计作为现代人们视觉体验的重要对象,不仅能表现产品特征,而且可以凸显企业的文化背景,更能够展现出一个国家深厚的文化底蕴。该文以传统文化在包装设计中的体现作为研究视角,希望通过研究促使中国包装产业更具特色。

俄罗斯图书馆学历史发展变迁解读

俄罗斯图书馆学是世界图书馆学的重要组成部分,前苏联时期俄罗斯图书馆学曾经是世界图书馆学体系的重要分支,在很长一段时期内对世界图书馆学的发展产生了重要影响。苏联解体后,受政治经济环境巨变影响俄罗斯图书馆学也发生了巨大变化,从理论到应用都出现了新的社会需求,其发展历程对我国图书馆学发展也有一定的借鉴意义。本文以历史发展为轴线,总结俄罗斯图书馆学发展历程,提出未来发展趋势。

绿色金融发展、研发投入对区域经济增长的影响研究

随着我国经济的不断快速发展,传统粗放型经济发展模式难以持续为经济增长提供动力,发展绿色金融已经成为缓解资源环境压力的必然选择。文章利用2012—2019年我国省份面板数据进行实证研究,得出绿色金融发展和研发投入均可以促进经济增长,但存在一定的区域差异,并结合实证结果提出了政策建议。

Elastic-energy imaging condition based on energy-flow vector

Elastic reverse-time migration can effectively deal with multicomponent seismic data in which the imaging condition based on energy norm can extract the scalar-imaging result from multicomponent data.However,the energy cross-correlation imaging condition characterized by particle velocity and stress suffers from the problem of overdependence on the background elastic parameters.Therefore,we characterize the elastic-wave energy using the energy-flow vector,which is equal to the energy density,without background elastic parameters.According to the source and receiver wave fields,we propose an imaging energyflow vector and an elastic-wave energy imaging condition.Under the assumption of a planewave solution,the backscattering suppression is verified.The numerical simulations show that the elastic-energy imaging condition can obtain the energy image without backscattering.Compared with the cross-correlation imaging conditions in a vector-based wave field,the proposed imaging condition can eliminate the dependence on the background elastic parameters and effectively process seabed multicomponent data,which are conducive to further providing an interpretation of marine geological structures.

Correlation between mixing enthalpy and structural order in liquid Mg−Si system

The mixing enthalpies and structural order in liquid Mg−Si system were investigated via ab-initio molecular dynamics at 1773 K.By calculating the transferred charges and electron density differences,the dominance of Si−Si interactions in the chemical environments around Si was demonstrated,which determined that the mixing enthalpy reached the minimum on Mg-rich side.In terms of Honeycutt and Anderson(HA)bond pairs based on the partial pair correlation functions,the attraction between Si−Si pairs and Mg atoms was revealed,and the evolution of structural order with Si content was characterized as a process of constituting frame structures by Si−Si pairs that dispersed Mg atoms.Focusing on tetrahedral order of local Si-configurations,a correlation between the mixing enthalpy and structural order was uncovered ultimately,which provided a new perspective combining the energetics with geometry to understand the liquid Mg−Si binary system.

Theoretical Design of Molecular Diode Based on Thiol-and Amino-Terminated Molecules

Utilizing density functional theory(DFT)and non-equilibrium Green's function,we systematically studied the electrical transport and rectification properties of thiol-and amino-terminated molecules embedded in graphene nanoribbons.We firstly found the thiol-terminated moleculesshowbetterelectron transport properties compared to the amino-terminated,which can be attributed to the strong electronwithdrawing ability and favorable coupling effects.Secondly,the symmetrical molecules show almost symmetrical current-voltage(-V)curves and exhibit negligible rectification effects.On the other hand,the asymmetrical molecules exhibit asymmetrical I-V curves and better rectification performance.The rectification effect is closely related to molecular asymmetry degrees.For example,the rectification ratio of asymmetric N6((E)-N1-(3-aminopropyl)-but-2-ene-1,4-diamine)molecule is much smaller than the N4(5-phenylthiazole-2,4-diamine)and N5(2,6-diaminohexane-1,1,5-triol)molecules.Furthermore,we found the rectification ratio of the asymmetrical amino-terminated molecules can reach 400,while the biggest rectification ratio of the thiol-terminated molecule can only reach 45.These findings offer crucial insights for future graphene molecular electronic device design.