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Photonics Research 2024年第4期12卷 865-875页

作者： ZHENGHAO GUO MENGJUN LIU ZIJIA CHEN ruizhi yang PEIYUN LI HAIXIA DA DONG YUAN GUOFU ZHOU LINGLING SHUI HUAPENG YE Guangdong Provincial Key Laboratory of Optical Information Materials and Technology&Institute of Electronic Paper Displays South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China SCNU-TUE Joint Lab of Device Integrated Responsive Materials(DIRM) National Center for International Research on Green OptoelectronicsSouth China Normal UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices School of Information and Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006China Joint Laboratory of Optofluidic Technology and Systems National Center for International Research on Green OptoelectronicsSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China College of Electronic and Optical Engineering&College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210046China Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province Nanjing 210023China

Liquid crystal(LC)photonic devices have attracted intensive attention in recent decades,due to the merits of tunability,cost-effectiveness,and high efficiency.However,the precise and efficient simulation of large-scale three-dimensional electrically stimulated LC photonic devices remains challenging and resource consuming.Here we report a straightforward nonuniform finite difference method(NFDM)for efficiently simulating largescale LC photonic devices by employing a spatially nonuniform mesh grid.

关键词： nonuniform crystal finite

Nano-Au-decorated hierarchical porous cobalt sulfide derived from ZIF-67 toward optimized oxygen evolution catalysis:Important roles of microstructures and electronic modulation

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Carbon Energy 2024年第5期6卷 1-14页

作者： Hongyu Gong Guanliang Sun Wenhua Shi Dongwei Li Xiangjun Zheng Huan Shi Xiu Liang ruizhi yang Changzhou Yuan Department of New Energy Materials School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiangJiangsuChina Advanced Materials Institute Qilu University of Technology(Shandong Academy of Sciences)JinanShandongChina Shandong Saikesaisi Hydrogen Energy Co. Ltd.JinanShandongChina Department of Materials Science and Engineering School of Materials Science&EngineeringUniversity of JinanJinanShandongChina Department of New Energy Science and Engineering College of EnergySoochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhouJiangsuChina

Enhancing both the number of active sites available and the intrinsic activity of Co-based electrocatalysts simultaneously is a desirable goal.Herein,a ZIF-67-derived hierarchical porous cobalt sulfide decorated by Au nanoparticles(NPs)(denoted as HP-Au@CoxSy@ZIF-67)hybrid is synthesized by low-temperature sulfuration treatment.The well-defined macroporous-mesoporous-microporous structure is obtained based on the combination of polystyrene spheres,as-formed CoxSy nanosheets,and ZIF-67 frameworks.This novel three-dimensional hierarchical structure significantly enlarges the three-phase interfaces,accelerating the mass transfer and exposing the active centers for oxygen evolution reaction.The electronic structure of Co is modulated by Au through charge transfer,and a series of experiments,together with theoretical analysis,is performed to ascertain the electronic modulation of Co by Au.Meanwhile,HP-Au@CoxSy@ZIF-67 catalysts with different amounts of Au were synthesized,wherein Au and NaBH4 reductant result in an interesting“competition effect”to regulate the relative ratio of Co^(2+)/Co^(3+),and moderate Au assists the electrochemical performance to reach the highest value.Consequently,the optimized HP-Au@CoxSy@ZIF-67 exhibits a low overpotential of 340 mV at 10 mA cm^(-2)and a Tafel slope of 42 mV dec-1 for OER in 0.1 M aqueous KOH,enabling efficient water splitting and Zn-air battery performance.The work here highlights the pivotal roles of both microstructural and electronic modulation in enhancing electrocatalytic activity and presents a feasible strategy for designing and optimizing advanced electrocatalysts.

关键词： Au nanoparticles cobalt sulfide electronic modulation hierarchical porous structure oxygen evolution reaction

LHAASO and Galactic cosmic rays

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The Innovation 2022年第4期3卷 11-12页

作者： ruizhi yang Department of Astronomy School of Physical SciencesUniversity of Science and Technology of ChinaHefei 230026China CAS Key Labrotory for Research in Galaxies and Cosmology University of Science and Technology of ChinaHefei 230026China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China

Cosmic rays(CRs)are relativistic charged particles in the interstellar medium(ISM).They are mainly protons(hydrogen nuclei)with about 10%fraction of helium nuclei and smaller abundances of heavier elements.CRs are an important component in ISM.In our galaxy,the energy density of CRs is similar to that of the magnetic fields and interstellar radiation fields(ISRFs).CRs also determine the ionization rate and heating of gas in the dense core of molecular clouds,thus playing a leading role in the astro-chemistry processes therein and controling the star-forming processes.More than a century has passed since Hess discovered the extra-terrestrial origin of CRs(in 1912),yet the origin of CRs still remains as a mystery.

关键词： relativistic origin galaxy

Liquid crystal-based optical aptasensor for the sensitive and selective detection of Gram-negative bacteria

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Science China Chemistry 2022年第10期65卷 2023-2030页

作者： Mengjun Liu Minmin Zhang Jiamei Chen ruizhi yang Zhaofan Huang Zhenping Liu Na Li Lingling Shui Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices School of Information and Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006China Joint Laboratory of Optofluidic Technology and Systems National Center for International Research on Green OptoelectronicsSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China

The sensitive and differential detection of Gram-negative bacteria is essential in food processing,environmental monitoring,and the daily chemical industry.Herein,we propose and validate a liquid crystal(LC)-based aptasensor for the ultrasensitive detection of Escherichia coli(E.coli),a model of Gram-negative bacteria.The nematic liquid crystal of 4-cyano-4’-pentylbiphenyl(5 CB) molecules can be orderly or disorderly arranged at the LC-aqueous interface via different stimuli,causing changes in optical texture due to birefringence.Bright schlieren texture is observed when a mixture solution of aptamer and hexadecyl trimethyl ammonium bromide(CTAB) is dripped onto the segmented LC films on a copper mesh.The specific binding of aptamers with target bacteria biomarkers liberates the CTAB molecules,which then self-assemble at the LC-aqueous interface to induce the vertical alignment of LCs.An optical transition from bright to dark is therefore achieved via the LC molecular orientation and serves as an aptasensor.Given the prominent affinity and specificity of the aptamer,the established sensitive and selective E.coli assay shows an ultralow detection limit of 27 cfu/mL.The prepared aptasensor can also be applied for the sensitive and selective determination of E.coli in fruit juice,soft drink,and cosmetic products,and shows great promise for the on-site detection of Gram-negative bacteria with high sensitivity and specificity for environmental monitoring,food safety assessment,and household chemical inspection.

关键词： liquid crystal molecular arrangement optical sensor aptamer Gram-negative bacteria

社会治理共同体的话语叙事与实践创新——一个政治学整合性解释框架

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社会科学研究 2024年第4期 23-35页

作者：杨睿智中国社会科学院大学政府管理学院北京102488

在政治学视域下透视社会治理共同体的话语叙事与实践创新,可从历史、理论、实践三重向度出发。首先,基于治理文明延续性,充分展开社会治理共同体从古典形态向现代形态演进流变的三重典型截面和基本线索脉络。其次,整体性地阐析社会治理... 详细信息

在政治学视域下透视社会治理共同体的话语叙事与实践创新,可从历史、理论、实践三重向度出发。首先,基于治理文明延续性,充分展开社会治理共同体从古典形态向现代形态演进流变的三重典型截面和基本线索脉络。其次,整体性地阐析社会治理共同体以人与社会关系为基底的叙事原点,以超越国家与社会关系原有范式为旨趣的运思起点,以秩序、合作、参与、和谐为取向的设计基点,以风险互担、安全互系、信息互联、交往互嵌、生活互助、治理互构、利益互惠、心灵互通为指向的发展支点,以党政机制、协商机制、社群机制、责任机制为载体的建构落点。最后,在多元化社会与一体化整合、高风险社会与高安全需求、原子化社会与公共性建构的内在耦合,以及数字化社会的数实孪生机理中,触达社会治理共同体的现实观照与未来景象。由此,整合历史向度的长时段溯源、理论向度的系统化建构与实践向度的动态化挖掘,形成以社会治理共同体为主题的、要素相对完整的政治学解释框架。

关键词：社会治理共同体社会治理治理文明国家-社会关系数实孪生

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治理体系韧性:国家治理可持续的内在机理

探索 2024年第1期 53-64页

作者：杨睿智中国社会科学院大学政府管理学院北京102488

韧性在文化观念场景与学术话语场景中形成了既联通又相异的丰富意蕴,就后者而言,韧性已经成为诸多学科关注的重要概念,指向特定事物应对外部风险的适应能力。以政治学视角对韧性进行理论化的加工与透视,有助于探知国家治理可持续的内在... 详细信息

韧性在文化观念场景与学术话语场景中形成了既联通又相异的丰富意蕴,就后者而言,韧性已经成为诸多学科关注的重要概念,指向特定事物应对外部风险的适应能力。以政治学视角对韧性进行理论化的加工与透视,有助于探知国家治理可持续的内在机理,深化对国家治理体系和治理能力的理解。在系统梳理与有机整合政治学视域的制度韧性研究、政党韧性研究、国家韧性研究、治理韧性研究的基础上,在政治学对国家治理议题的知识建构与核心关切中,在韧性概念的基本内核与通约理解的前提下,可以明确将国家治理体系韧性的基本意涵界定为:国家治理体系能够对各种风险挑战进行敏捷适应和有效规制,并在这一过程中实现自我成长与优化的能力。从对概念的澄清出发,一方面,基于韧性呈现的情境与韧性呈现的要素回答“韧性何以识别”,基于所有可持续国家治理体系的普遍性质明确“韧性何以定位”,基于国家治理制度体系与国家性、行动体系与政党韧性、价值体系与韧性精神的交互关系探究“韧性何以生成”,进而实现对治理体系韧性的理论化阐释;另一方面,基于经济发展困境、技术变革风险、群体关系危机、价值多元挑战、体制内部腐化、外部环境骤变与国家治理体系“冲击—应对”的互动,解析治理体系韧性的实际运作过程。

关键词：韧性国家治理体系国家治理能力风险挑战

A diffusive predator-prey system with additional food and intra-specific competition among predators

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International Journal of Biomathematics 2018年第4期11卷 301-328页

作者： ruizhi yang Ming Liu Chunrui Zhangt Department of Mathematics Northeast Forestry University Harbin 150040 Heilongjiang China

In this paper, a diffusive predator–prey system with additional food and intra-specific competition among predators subject to Neumann boundary condition is investigated. For non-delay system, global stability, Turing instability and Hopf bifurcation are studied. For delay system, instability and Hopf bifurcation induced by time delay and global stability of boundary equilibrium are discussed. By the theory of normal form and center manifold method, the conditions for determining the bifurcation direction and the stability of the bifurcating periodic solution are derived.

关键词：食肉动物系统食物猎物竞争 Neumann 不稳定性 Hopf

Direct synthesis of large-area Al-doped graphene by chemical vapor deposition:Advancing the substitutionally doped graphene family

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Nano Research 2022年第2期15卷 1310-1318页

作者： Sami Ullah Yu Liu Maria Hasan Wenwen Zeng Qitao Shi Xiaoqin yang Lei Fu Huy Q.Ta Xueyu Lian Jingyu Sun ruizhi yang Lijun Liu Mark H.Rummeli College of Energy Soochow Institute for Energy and Materials Innovations Soochow UniversitySuzhou 215006China Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow UniversitySuzhou 215006China NUTECH School of Applied Sciences&Humanities and Computer Engineering Department National University of TechnologyIslamabad 42000Pakistan Centre of Polymer and Carbon Materials Polish Academy of SciencesM.Curie-Sklodowskiej 34Zabrze 41-819Poland School of Energy and Power Engineering Xian Jiaotong UniversityXian 710049China College of Chemistry and Molecular Science Wuhan UniversityWuhan 430072China Institute for Complex Materials IFW Dresden 20 Helmholtz Strasse Dresden 01069Germany Institute of Environmental Technology VSB-Technical University of Ostrava17.listopadu 15Ostrava 70833Czech Republic

Graphene doping continues to gather momentum because it enables graphene properties to be tuned,thereby affording new properties to,improve the performance of,and expand the application potential of graphene.Graphene can be chemically doped using various methods such as surface functionalization,hybrid composites(e.g.,nanoparticle decoration),and substitution doping,wherein C atoms are replaced by foreign ones in the graphene lattice.Theoretical works have predicted that graphene could be substitutionally doped by aluminum(Al)atoms,which could hold promise for exciting applications,including hydrogen storage and evolution,and supercapacitors.Other theoretical predictions suggest that Al substitutionally doped graphene(AIG)could serve as a material for gas sensors and the catalytic decomposition of undesirable materials.However,fabricating Al substitutionally doped graphene has proven challenging until now.Herein,we demonstrate how controlled-flow chemical vapor deposition(CVD)implementing a simple solid precursor can yield high-quality and large-area monolayer AIG,and this synthesis is unequivocally confirmed using various characterization methods including local electron energy-loss spectroscopy(EELS).Detailed high-resolution transmission electron microscopy(HRTEM)shows numerous bonding configurations between the Al atoms and the graphene lattice,some of which are not theoretically predicted.Furthermore,the produced AIG shows a CO_(2) capturability superior to those of other substitutionally doped graphenes.

关键词： aluminum-doped graphene single-solid precursor chemical vapor deposition carbon dioxide capture energy storage catalytic applications

Modeling the effect of water vaporization and salt precipitation on reservoir properties due to carbon dioxide sequestration in a depleted gas reservoir

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Petroleum 2018年第4期4卷 385-397页

作者： Yong Tang ruizhi yang Xingmei Kang State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China China Petrochemical International(Ningbo)Co. LtdNinbo310500China Exploration and Development Research Institute of Changqing Oil Field Branch Company of PetroChina Xi'an710016China

Vaporization of water during both gas reservoir development and CO2 geological sequestration in saline formations can cause salt precipitation with rapid loss of formation porosity and permeability.Water vaporization and precipitation of halite around a single well from stage production to CO2 injection are studied to investigate the effect on reservoir properties in a gas reservoir.This paper identifies and quantifies post-flood dry zones and permeability changes in depleted gas reservoir after CO2 exposure with the comparison in gas production period by performing the numerical simulation with the compositional simulator.Simulation results indicate that water vaporization and salt precipitation occur during gas production,and can be intensified by CO2 injection.Dry supercritical CO2 injection vaporizes the brine promoting brine concentration and halite precipitation.The simulation indicates a drying area with a radius of 78 m around wellbore after CO2 injection.Porosity reduces with the most scope of 58%,and permeability can be decreased by up to 93.9%due to salt precipitation.And the injectivity is damaged by 99.77%at the end of injection period based on maximum permeability reduction.Moreover,six factors are investigated to conduct the influence analysis,showing that higher salinity brine,higher injection rate,higher irreducible water saturation,lower initial permeability,higher temperature and with capillary flow are conditions enhancing the salt precipitation due to dry CO2 injection.

关键词： reservoir depleted intensified

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基于经验小波变换的SOFC泄漏故障诊断

电池 2024年第2期54卷 170-174页

作者：杨瑞志武鑫熊星宇胡亮华北电力大学能源动力与机械工程学院北京102206 中国矿业大学(北京)机械与电气工程学院北京100083

固体氧化物燃料电池(SOFC)电堆通常在700℃以上的高温下工作。电堆所用密封剂在高温下易退化失效,导致泄漏故障,引发电堆的热失控和损坏,影响系统运行稳定性。提出一种基于电堆温度和电压信号的经验小波变换(EWT)诊断方法。通过EWT分解... 详细信息

固体氧化物燃料电池(SOFC)电堆通常在700℃以上的高温下工作。电堆所用密封剂在高温下易退化失效,导致泄漏故障,引发电堆的热失控和损坏,影响系统运行稳定性。提出一种基于电堆温度和电压信号的经验小波变换(EWT)诊断方法。通过EWT分解温度和电压信号,得到多分辨率分析(MRA),分析其中故障特征明显的MRA信号,求出时域特征,通过设定的阈值判断是否发生泄漏。通过千瓦级电堆实验平台数据,验证EWT诊断方法可较好地检测电堆泄漏故障,且相较于电压信号,温度信号的诊断更迅速。与集合经验模态分解诊断方法相比,EWT方法可更快地诊断出泄漏故障。

关键词：系统建模固体氧化物燃料电池(SOFC) 电堆泄漏经验小波变换(EWT)

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