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Promoted catalytic property of Cu/SSZ-13 by introducing a minority of Mn for NO removal from diesel engine exhaust

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Chinese Journal of Chemical Engineering 2024年第7期71卷 172-182页

作者： Runnong Yang Wuyuan Liu zhaoying Wang Ming Sun Guangying Fu Zihan Gao Wenjian Jiao Rui Li Lin Yu Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Jieyang 515200China Guangdong Engineering Technology Research Center of Modern Fine Chemical Engineering School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006China Key Laboratory of Bioinorganic and Synthetic Chemistry School of ChemistrySun Yat-sen UniversityGuangzhou 510275China Testing and Certification Business Department China Automotive Technology and Research Center Company LimitedWuhan 430056China Guangdong Foran Technology Company Limited Foshan 528000China

The Cu-exchanged SSZ-13 with the small-pore chabazite framework is considered as a highly efficient catalyst for selective catalytic reduction of NO with NH_(3)(NH_(3)-SCR).In order to further improve the catalytic property,a series of Mn ion-assisted Cu/SSZ-13 powder catalysts were prepared by co-exchange method and stepwise exchange *** is found that the NH_(3)-SCR activity,N_(2) selectivity,hydrothermal stability and sulfur resistance of Cu/SSZ-13 are promoted by introducing a minority of Mn(0.15%to 0.23%(mass))through co-exchange *** results reveal that the Cu,Mn co-exchange enables the higher amounts of Cu^(2+)active sites,the abundant medium strong and strong acid,the optimized ratio of Lewis acid to Brønsted acid etc.,which are required for a good NH_(3)-SCR catalytic property over broad temperature range and under harsh working ***,a monolithic catalyst was prepared by impregnating a cordierite ceramic support into the coating slurry containing the optimized CuMn/SSZ-13 *** diesel engine bench tests show that Cu,Mn co-exchange gives the monolith catalyst a better catalytic property than commercial *** work provides an important guidance for the rational design of secondary-ion-assisted zeolites applied in NH_(3)-SCR.

关键词： MnCu/SSZ-13 Co-exchange Zeolite Catalysis Selective catalytic reduction

Surface plasmon decorated InGaO deep-UV photodetector array for image sensing and water quality monitoring via highly effective hot electron excitation and interfacial injection

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Science China(Technological Sciences) 2024年第8期67卷 2449-2460页

作者： SHU LinCong SHA ShuLin XI zhaoying LI Lei YAO SuHao ZHANG JiaHan JI XueQiang ZHANG ShaoHui BIAN Ang JIANG MingMing GUO YuFeng TANG WeiHua LIU Zeng Innovation Center of Gallium Oxide Semiconductor(IC-GAO) College of Integrated Circuit Science and EngineeringNanjing University of Posts and TelecommunicationsNanjing 210023China School of Electronic Information Engineering Inner Mongolia UniversityHohhot 010021China College of Science MIIT Key Laboratory of Aerospace Information Materials and PhysicsNanjing University of Aeronautics and AstronauticsNanjing 211106China Collaborative Innovation Center of Advanced Microstructures School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Institute of Biological and Medical Engineering Guangdong Academy of SciencesGuangzhou 510316China School of Science Jiangsu University of Science and TechnologyZhenjiang 212100China School of Integrated Circuits Beijing University of Posts and TelecommunicationsBeijing 100876China

In addition to the plasmon-mediated resonant coupling mechanism,the excitation of hot electron induced by plasmon presents a promising path for developing high-performance optoelectronic devices tailored for various *** study introduces a sophisticated design for a solar-blind ultraviolet(UV)detector array using linear In-doped Ga_(2)O_(3) (InGaO)modulated by platinum(Pt)nanoparticles(PtNPs).The construction of this array involves depositing a thin film of Ga_(2)O_(3) through the plasmonenhanced chemical vapor deposition(PECVD)***,PtNPs were synthesized via radio-frequency magnetron sputtering and annealing *** performance of these highly uniform arrays is significantly enhanced owing to the generation of high-energy hot *** process is facilitated by non-radiative decay processes induced by ***,the array achieves maximum responsivity(R)of 353 mA/W,external quantum efficiency(EQE)of 173%,detectivity(D*)of approximately 10~(13)Jones,and photoconductive gain of *** addition,the standard deviation for photocurrent stays below17%for more than 80%of the array units within the ***,the application of this array extends to photon detection in the deep-UV(DUV)*** includes critical areas such as imaging sensing and water quality *** leveraging surface plasmon coupling,the array achieves high-performance DUV photon *** approach enables a broad spectrum of practical applications,underscoring the significant potential of this technology for the advancement of DUV detectors.

关键词： InGaO PECVD surface plasmon solar-blind UV photodetector array optoelectronic applications

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A Perturbation Analysis of Low-Rank Matrix Recovery by Schatten p-Minimization

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Journal of Applied Mathematics and Physics 2024年第2期12卷 475-487页

作者： zhaoying Sun Huimin Wang Zhihui Zhu Department of Mathematics Shaoxing University Shaoxing China

A number of previous papers have studied the problem of recovering low-rank matrices with noise, further combining the noisy and perturbed cases, we propose a nonconvex Schatten p-norm minimization method to deal with the recovery of fully perturbed low-rank matrices. By utilizing the p-null space property (p-NSP) and the p-restricted isometry property (p-RIP) of the matrix, sufficient conditions to ensure that the stable and accurate reconstruction for low-rank matrix in the case of full perturbation are derived, and two upper bound recovery error estimation ns are given. These estimations are characterized by two vital aspects, one involving the best r-approximation error and the other concerning the overall noise. Specifically, this paper obtains two new error upper bounds based on the fact that p-RIP and p-NSP are able to recover accurately and stably low-rank matrix, and to some extent improve the conditions corresponding to RIP.

关键词： Nonconvex Schatten p-Norm Low-Rank Matrix Recovery p-Null Space Property the Restricted Isometry Property

IKIP downregulates THBS1/FAK signaling to suppress migration and invasion by glioblastoma cells

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Oncology Research 2024年第7期32卷 1173-1184页

作者： zhaoying ZHU YANJIA HU FENG YE HAIBO TENG GUOLIANG YOU YUNHUI ZENG MENG TIAN JIANGUO XU JIN LI ZHIYONG LIU HAO LIU NIANDONG ZHENG Department of Neurosurgery The Affiliated Hospital of Southwestern Medical UniversityLuzhouChina Department of Neurosurgery Sichuan University West China HospitalChengduChina

Background:Inhibitor of NF-κB kinase-interacting protein(IKIP)is known to promote proliferation of glioblastoma(GBM)cells,but how it affects migration and invasion by those cells is ***:We compared levels of IKIP between glioma tissues and normal brain tissue in clinical samples and public *** examined the effects of IKIP overexpression and knockdown on the migration and invasion of GBM using transwell and wound healing assays,and we compared the transcriptomes under these different conditions to identify the molecular mechanisms ***:Based on data from our clinical samples and from public databases,IKIP was overexpressed in GBM tumors,and its expression level correlated inversely with *** overexpression in GBM cells inhibited migration and invasion in transwell and wound healing assays,whereas IKIP knockdown exerted the opposite *** overexpression in GBM cells that were injected into mouse brain promoted tumor growth but inhibited tumor invasion of surrounding *** effects of IKIP were associated with downregulation of THBS1 mRNA and concomitant inhibition of THBS1/FAK ***:IKIP inhibits THBS1/FAK signaling to suppress migration and invasion of GBM cells.

关键词： Inhibitor of NF-κB kinase-interacting protein(IKIP) Glioblastoma(GBM) Migration Thrombospondin 1(THBS1) FAK signaling

黄河流域农业绿色低碳生产效率空间关联网络结构特征及驱动因素识别

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干旱区资源与环境 2024年第2期38卷 27-38页

作者：钱昭英刘书杰贵州财经大学经济学院贵阳550000

基于黄河流域84个地级行政区数据,通过三阶段SBM-DEA模型测度农业绿色低碳生产效率,运用社会网络分析法剖析黄河流域农业绿色低碳生产效率空间关联网络结构特征,利用QAP模型探究空间关联网络的驱动因素。结果表明:1)黄河流域农业绿色低... 详细信息

基于黄河流域84个地级行政区数据,通过三阶段SBM-DEA模型测度农业绿色低碳生产效率,运用社会网络分析法剖析黄河流域农业绿色低碳生产效率空间关联网络结构特征,利用QAP模型探究空间关联网络的驱动因素。结果表明:1)黄河流域农业绿色低碳生产效率存在显著的空间关联和溢出效应,且呈现出复杂的空间网络特征,但是空间关联网络的关联性有待加强。2)山东、河南、山西、内蒙古等省份的部分地区在网络中的中心度较高,属于空间关联网络的“领头人”和“中间人”。3)黄河流域农业绿色低碳生产效率空间关联网络可划分为净溢出、净受益、双向溢出和经纪人4个板块,板块内部和板块间均存在显著的溢出效应,且板块间的溢出效应具有明显的传递特征。4)农业经济发展水平、经济发展水平、对外开放水平、农村居民收入、财政支持水平、农业技术水平的差异和空间邻接关系对空间关联网络的形成与发展有显著的影响。

关键词：黄河流域农业绿色低碳生产效率空间关联网络结构社会网络分析差异化发展

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适应不确定性:菲律宾对冲战略的演变逻辑

南洋问题研究 2024年第3期 33-48页

作者：韩召颖李源南开大学周恩来政府管理学院天津300350

2010年以来,菲律宾的对冲战略经历了短暂调整、瓦解、重塑与再次调整4个阶段。如何解释菲律宾对冲战略的演变动态?在美国强化对华竞争的背景下,第三方国家对冲实施的历时性变化成为日益重要的研究议题。对冲战略的实施演变理论上可分为... 详细信息

2010年以来,菲律宾的对冲战略经历了短暂调整、瓦解、重塑与再次调整4个阶段。如何解释菲律宾对冲战略的演变动态?在美国强化对华竞争的背景下,第三方国家对冲实施的历时性变化成为日益重要的研究议题。对冲战略的实施演变理论上可分为维持、调整与瓦解三种状态。应对不确定性是对冲实施的基本逻辑,其在不确定性条件下具有明显的功能。在中美菲三方关系结构下,菲律宾领导人需要不断评估外部威胁与安全承诺两类具体的不确定性因素,对两类不确定性的评估影响了对冲战略的功能,进而引发其实施演变。阿基诺三世政府对冲战略的短暂调整与瓦解、杜特尔特政府对冲战略的重塑与维持,以及杜特尔特执政后期尤其是小马科斯执政后对冲战略再次转向选边立场的调整,是领导人为实现利益最大化、不断评估和适应不确定性的结果。该研究有助于进一步理解不确定性与对冲实施的关系,对于分析对冲实施的动态变化问题具有现实意义。

关键词：大国竞争对冲功能菲律宾对冲演变

“经济人”还是“政治人”:半导体超级企业的策略选择机制

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太平洋学报 2024年第4期32卷 14-29页

作者：韩召颖刘锦南开大学天津300350

在美国点名施压之下,为何全球半导体超级企业在中美两国间的策略选择呈现出较为明显的差异?既有研究对于高科技超级企业在大国科技竞争背景下的决策机制关注不足。超级企业的策略选择受到外部大国关系和自身“经济人”“政治人”属性的... 详细信息

在美国点名施压之下,为何全球半导体超级企业在中美两国间的策略选择呈现出较为明显的差异?既有研究对于高科技超级企业在大国科技竞争背景下的决策机制关注不足。超级企业的策略选择受到外部大国关系和自身“经济人”“政治人”属性的影响,当体系内大国关系处于合作的良性状态时,“经济人”逻辑占据上风,企业能够在全球市场中自主决策,理性地追求自身利润最大化;当大国关系为竞争甚至走向对抗时,“政治人”逻辑则占据上风,企业“政治人”属性的强弱决定其如何应对美国的政治胁迫,进而决定能否进入下一阶段遵循“经济人”逻辑的决策环节。台积电、英伟达和阿斯麦的策略选择能够为这一分析框架提供经验证据。该研究有助于理解美国对华科技竞争背景下高科技超级企业的决策机制,也对中国和中国企业在技术变革时代分析合作伙伴和竞争对手的行为逻辑具有一定启发意义。

关键词：超级企业 “经济人” “政治人” 科技竞争半导体产业链

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考虑减排潜力的中国省域碳排放权分配研究——基于改进的ZSG-DEA模型

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工业技术经济 2024年第7期43卷 91-100页

作者：钱昭英田磊贵州财经大学经济学院贵阳550000

在2030年中国实现碳达峰的目标背景下,本文针对碳排放权合理分配的问题,采用改进的ZSG-DEA模型考虑各省(区、市)的减排潜力,探寻兼顾公平和效率的碳排放权省域分配方案。研究结果表明:(1)我国各区域减排潜力各不相同,东部地区减排潜力较... 详细信息

在2030年中国实现碳达峰的目标背景下,本文针对碳排放权合理分配的问题,采用改进的ZSG-DEA模型考虑各省(区、市)的减排潜力,探寻兼顾公平和效率的碳排放权省域分配方案。研究结果表明:(1)我国各区域减排潜力各不相同,东部地区减排潜力较大,西部地区减排潜力组内差距较大,且低减排潜力组有50%集中在西部地区,中部地区整体减排潜力不足,东北地区集中于中、低减排潜力组;(2)改进的ZSG-DEA模型计算出减排系数更加合理,缩减了减排压力差距,能通过缩小省(区、市)之间的不公平程度来降低政策实施难度;(3)综合减排潜力和减排系数两个方面发现,仍有部分省(区、市)如河南等处于低潜力高减排的状态,面临凭借自身条件难以有效降碳的困境,也有部分地区在碳减排方面“仍有余力”。基于上述结论,本文提出以下建议:各区域应发挥自身优势助力碳减排,在安排省(区、市)碳排放额度时要注重不同省(区、市)的减排潜力,同时加强减排责任意识,推动区域之间的合作。

关键词：碳排放权分配 ZSG-DEA模型减排潜力减排压力减排系数区域异质性公平效率

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弱国升级不对称领土争端的行为逻辑

国际安全研究 2024年第1期42卷 56-80,164页

作者：李源韩召颖南开大学周恩来政府管理学院天津300350

在与强国的领土争端中,弱国为何会主动使用武力、升级领土争端?既有研究对于不对称形态的领土争端以及弱国的升级行为逻辑关注不足。由于争端双方的实力差距,不对称形态的领土争端对弱国的争端行为选择与强弱双方的互动具有重要影响。... 详细信息

在与强国的领土争端中,弱国为何会主动使用武力、升级领土争端?既有研究对于不对称形态的领土争端以及弱国的升级行为逻辑关注不足。由于争端双方的实力差距,不对称形态的领土争端对弱国的争端行为选择与强弱双方的互动具有重要影响。弱国决策者的被惩罚预期与国内社会的受害者心态,是影响弱国升级不对称领土争端的两个重要因素。弱国决策者预期升级行为不会引发强国的严厉惩罚,将促使其对升级行为的成本—收益结果持乐观态度,构成弱国升级领土争端的战略机遇。弱国在与强国互动过程中形成的受害者心理,促使其接受使用武力的潜在风险,构成弱国升级领土争端的战略动机。弱国的升级行为最终受到机遇—动机的共同作用,既是源于预期强国行为反应所带来的宝贵机会窗口,也是受害者心理形成与释放的结果。1982年阿根廷—英国马岛战争与2008年格鲁吉亚—俄罗斯冲突两个案例,可以为这一分析框架提供经验证据。该研究有助于在理论上理解不对称领土争端的爆发与升级,同时能够为中国周边领土争端的反复发生提供现实启示。

关键词：不对称领土争端被惩罚预期受害者心理机遇—动机