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Room-temperature ferrimagnetism and size-modulated electronic structures in two-dimensional cluster-based metal-organic frameworks

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Science China Chemistry 2024年第4期67卷 1334-1340页

作者： jing cheng Xingxing Li Jinlong Yang Key Laboratory of Precision and Intelligent Chemistry University of Science and Technology of ChinaHefei 230026China Department of Chemical Physics University of Science and Technology of ChinaHefei 230026China Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China

Cluster-assembled materials have attracted particular attention for their complex hierarchical structures and unique ***,the majority of cluster-based assemblies developed so far are either non-magnetic or only exhibit magnetic ordering with a relatively low Curie temperature,limiting their applications in ***,two-dimensional(2D)cluster-assembled materials with room-temperature magnetism remain highly *** this purpose,based on first principles calculations,we design a series of thermodynamically stable 2D cluster-based metal-organic frameworks(MOFs)Fe_(n)-(pyz)(n=1-6)by utilizing Fenmetal clusters as nodes and nitrogen-containing pyrazine ligands as organic *** 2D cluster-based MOFs exhibit robust ferrimagnetic ordering due to the strong d-p direct exchange interaction between d-electron spin of Fe_(n)(n=1-6)clusters and charge transfer-induced p-electron spin of pyrazine *** particular,the ferrimagnetic Curie temperatures are well above room temperature(up to 836 K).Additionally,altering the size of Fe_(n)clusters in Fe_(n)-(pyz)(n=1-6)MOFs results in diverse functional spintronic properties,including bipolar magnetic semiconductors,half semiconductors and Dirac half ***,these 2D assembled MOFs possess sizable magnetic anisotropy energies,up to 9.16 me V per formula.

关键词： metal-organic framework two-dimensional material half metal bipolar magnetic semiconductor magnet

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Visual test paper based on Au/δ-MnO_(2) hollow nanosphere oxidase-like activity regulation using hexavalent chromium as a smart switch

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Rare Metals 2024年第2期43卷 711-722页

作者： Wen-Chang Zhuang Hai-Yue Zhang Zhen-Yang Chen Wen-jing cheng Wei-Dan Na Zhao Li Lin Tian School of Materials and Chemical Engineering Xuzhou University of TechnologyXuzhou221018China School of Chemistry and Environmental Science Yili Normal UniversityYining835000China

Paper-based sensing platform is a point of need analytical toolkit for safety ***,the sensitivity,specificity,and simplicity are still ***,we report a novel strategy(Au/δ-MnO_(2) hollow nanosphere and 3,3′,5,5′-tetramethylbenzidine(TMB)induced test strips for signal-on detection)that can be utilized for hexavalent chromium(Cr^(6+))***,Cr^(6+)(CrO_(4)^(2−)) as a smart switch can remarkably enhance the oxidase-like activity of Au/δ-MnO_(2) hollow *** presence of Cr^(6+) can regulate the surface electronic redistribution of Au/δ-MnO_(2) and adjust the geometric configuration,which leads to the improvement in oxidase-like activity of Au/δ-MnO_(2).As a proof-of-concept application,a visual paper-based sensing platform of Cr^(6+) along with quantitative analysis by the test strips was successfully *** paper-based sensing platform exhibits a linear range with excellent selectivity for other interfering substances and lower limit of detection of 0.09μmol·L^(−1),providing a promising toolkit at-home Cr^(6+) measurement and environmental monitoring.

关键词： Point of need Colorimetric biosensing platform Au/δ-MnO_(2) hollow nanosphere Test strip Cr^(6+)

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Miniature tunable Airy beam optical meta-device

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Opto-Electronic Advances 2024年第2期7卷 5-12页

作者： jing cheng Zhang Mu Ku Chen Yubin Fan Qinmiao Chen Shufan Chen Jin Yao Xiaoyuan Liu Shumin Xiao Din Ping Tsai Department of Electrical Engineering City University of Hong KongKowloonHong Kong SAR 999077China State Key Laboratory of Terahertz and Millimeter Waves City University of Hong KongKowloonHong Kong SAR 999077China Centre for Biosystems Neuroscienceand NanotechnologyCity University of Hong KongKowloonHong Kong SAR 999077China Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic SystemsHarbin Institute of TechnologyShenzhen 518055China

Tunable Airy beams with controllable propagation trajectories have sparked interest in various fields,such as optical manipulation and laser *** research approaches encounter challenges related to insufficient compactness and integration feasibility,or they require enhanced tunability to enable real-time dynamic manipulation of the propagation *** this work,we present a novel method that utilizes a dual metasurface system to surpass these limitations,significantly enhancing the practical potential of the Airy *** approach involves encoding a cubic phase profile and two off-axis Fresnel lens phase profiles across the two *** validity of the proposed strategy has been confirmed through simulation and experimental *** proposed meta-device addresses the existing limitations and lays the foundation for broadening the applicability of Airy beams across diverse domains,encompassing light-sheet microscopy,laser fabrication,optical tweezers,etc.

关键词： metasurface miniature device tunable Airy beam tunable meta-device

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中国式农业现代化道路的历史生成、创新特质与实践价值

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西南民族大学学报（人文社会科学版） 2024年第4期45卷 174-181页

作者：程静西华师范大学马克思主义学院四川南充637000

中国式农业现代化承续世界农业现代化的共同特征,借鉴了苏联社会主义农业现代化的正反经验,在理论和实践中不断开拓创新发展。以发展战略为牵引,以土地制度创新为基础,以小农户和现代农业发展相衔接为重点,以农业生态化发展为方向,开辟... 详细信息

中国式农业现代化承续世界农业现代化的共同特征,借鉴了苏联社会主义农业现代化的正反经验,在理论和实践中不断开拓创新发展。以发展战略为牵引,以土地制度创新为基础,以小农户和现代农业发展相衔接为重点,以农业生态化发展为方向,开辟了一条中国式农业现代化道路。中国式农业现代化道路的开辟,极大提升了中国农业发展水平,开辟了社会主义农业现代化的新道路,为世界农业现代化特别是广大发展中国家农业现代化提供了新方案。

关键词：农业现代化中国式现代化土地制度机械化合作化

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Antioxidant peptides from Lateolabrax japonicus to protect against oxidative stress injury in Drosophila melanogaster via biochemical and gut microbiota interaction assays

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Food Science and Human Wellness 2024年

作者： Chen Li Lichan Li jing cheng Xu Chen Mohamed A.Farag Xixi Cai Shaoyun Wang College of Chemical Engineering College of Biological Science and Engineering Fuzhou University Pharmacognosy Department Faculty of Pharmacy Cairo University

Identification of natural substances with antioxidant properties is ongoing research for addressing issues related to oxidative stress especially attributed to environmental effects. Our previous study demonstrated that Lateolabrax japonicus peptides （LPH）， rich in Glu， Gly， and hydrophobic amino acids， exhibited remarkable antioxidant activity in vitro， with though its action mechanism yet to be revealed. Therefore， to assess the in vivo antioxidative properties of LPH， we employed H2O2to generate oxidative stress in Drosophila melanogaster model. Results indicated that LPH significantly prolonged the lifespan of Drosophila subjected to oxidative stress mostly mediated via LPH's enhancement of the antioxidant defense system and intestinal functions. Antioxidant effects were manifested by a decrease in malondialdehyde （MDA） levels， elevated superoxide dismutase （SOD）， catalase （CAT）， and glutathione peroxidase （GSH-Px） activities， decreased levels of reactive oxygen species （ROS） in intestinal epithelial cells， and the preservation of intestinal length. LPH effectively controlled the excessive proliferation and differentiation of oxidative stress-induced Drosophila intestinal stem cells. At the gene level， LPH upregulated the expression of antioxidant-related Nrf2 genes while concurrently downregulated mTOR expression level. Furthermore， high-throughput 16S rDNA sequencing revealed that the addition of LPH significantly influenced the diversity and abundance of the intestinal microbiota in H2O2-induced Drosophila. These findings provide a deeper understanding of the antioxidative mechanism of LPH， suggesting its potential applications in food industry and to be assessed using other in vivo oxidative stress models.

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大学生美好生活观的价值偏离与复归

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江苏高教 2024年第3期 116-120页

作者：程婧天津理工大学马克思主义学院天津300384

美好生活作为一个蕴含多重维度的复杂矛盾统一体,内在要求以唯物辩证法对其进行全面把握。多元思潮和亚文化以形而上学非此即彼的思维方式将美好生活各维度进行肢解与分裂,导致大学生美好生活观出现“盲从化”“物欲化”“虚无化”“私... 详细信息

美好生活作为一个蕴含多重维度的复杂矛盾统一体,内在要求以唯物辩证法对其进行全面把握。多元思潮和亚文化以形而上学非此即彼的思维方式将美好生活各维度进行肢解与分裂,导致大学生美好生活观出现“盲从化”“物欲化”“虚无化”“私利化”“享乐化”等价值偏离。要实现大学生美好生活观的价值回归,需要超越形而上学的遮蔽,使美好生活各维度摆脱彼此分裂的二元对立,以开放和包容的方式实现内在统一。

关键词：大学生美好生活观价值观

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基于全生命周期管理理念的医疗设备信息管理系统

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中国医疗器械杂志 2024年第3期48卷 319-322,338页

作者：程静成都市第五人民医院成都市611130

目的加强医疗设备的合法、合规、合理使用,进一步引导医疗行为的合理化。方法利用物联网+图像分析技术,采集医疗设备真实的运行数据,建立医疗设备实时运行数据库。结合设备“全生命周期”的12大关键环节和8+6管理制度框架,对医疗设备的... 详细信息

目的加强医疗设备的合法、合规、合理使用,进一步引导医疗行为的合理化。方法利用物联网+图像分析技术,采集医疗设备真实的运行数据,建立医疗设备实时运行数据库。结合设备“全生命周期”的12大关键环节和8+6管理制度框架,对医疗设备的使用效率、效益、效果进行精益管理。结果实现了医疗设备提质增效、降本控费,并为科学决策提供了数据支撑。结论创新了医疗设备全生命周期的管理模式,为医院设备的管理提供了科学的方法。

关键词：医疗设备全生命周期评估指标真实数据

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MEIC-global-CO_(2):A new global CO_(2)emission inventory with highly-resolved source category and sub-country information

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Science China Earth Sciences 2024年第2期67卷 450-465页

作者： Ruochong XU Dan TONG Qingyang XIAO Xinying QIN Cuihong CHEN Liu YAN jing cheng Can CUI Hanwen HU Wenyu LIU Xizhe YAN Huaxuan WANG Xiaodong LIU Guannan GENG Yu LEI Dabo GUAN Kebin HE Qiang ZHANG Department of Earth System Science Ministry of Education Key Laboratory for Earth System ModelingInstitute for Global Change StudiesTsinghua UniversityBeijing100084China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Chinese Academy of Environmental Planning Beijing100041China Institute for Carbon Neutrality Tsinghua UniversityBeijing100084China

CO_(2)emission inventory provides fundamental data for climate research and emission ***,most global CO_(2)emission inventories were developed with energy statistics from International Energy Agency(IEA)and were available at country level with limited source ***,as the first step toward a high-resolution and dynamic updated global CO_(2)emission database,we developed a data-driven approach to construct seamless and highly-resolved energy consumption data cubes for 208 countries/territories,797 sub-country administrative divisions in 29 countries,42 fuel types,and 52 sectors,with the fusion of activity data from 24 international statistics and 65 regional/local *** CO_(2)emissions from fossil fuel combustion and cement production in 1970–2021 were then estimated with highly-resolved source category(1,484 of total)and sub-country information(797 of total).Specifically,73%of global CO_(2)emissions in 2021 were estimated with sub-country information,providing considerably improved spatial resolution for global CO_(2)emission *** the support of detailed information,the dynamics of global CO_(2)emissions across sectors and fuel types were presented,representing the evolution of global economy and progress of climate *** differences of sectoral contribution were found across sub-country administrative divisions within a given country,revealing the uneven distribution of energy and economic structure among different *** estimates were generally consistent with existing databases at aggregated level for global total or large emitters,while large discrepancies were observed for middle and small *** database,named the Multiresolution Emission Inventory model for Climate and air pollution research(MEIC)is publicly available through http://*** with highly-resolved information and timely update,which provides an independent carbon emission accounting data source for climate rese

关键词： CO_(2)emissions Data-driven approach Highly-resolved source category Sub-country information

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城市固体废物焚烧过程炉温的鲁棒加权异构特征集成预测模型

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自动化学报 2024年第1期50卷 121-131页

作者：郭京承严爱军汤健北京工业大学信息学部北京100124 数字社区教育部工程研究中心北京100124 城市轨道交通北京实验室北京100124

针对城市固体废物(Municipal solid waste,MSW)焚烧过程,数据具有异常值和特征变量维度高时,炉温预测模型的准确性和泛化能力欠缺的挑战性问题,提出一种鲁棒加权异构特征集成建模方法,用于建立城市固体废物焚烧过程炉温预测模型.首先,... 详细信息

针对城市固体废物(Municipal solid waste,MSW)焚烧过程,数据具有异常值和特征变量维度高时,炉温预测模型的准确性和泛化能力欠缺的挑战性问题,提出一种鲁棒加权异构特征集成建模方法,用于建立城市固体废物焚烧过程炉温预测模型.首先,依据焚烧过程机理将高维特征变量划分为异构特征集合,并采用互信息和相关系数综合评估每组异构特征集合的贡献度;其次,采用基于混合t分布的鲁棒随机配置网络(Stochastic configuration network,SCN)构建基模型,同时确定训练样本的惩罚权重;最后,设计一种鲁棒加权负相关学习(Negative correlation learning,NCL)策略,实现基模型的鲁棒同步训练.使用国内某城市固体废物焚烧厂的炉温历史数据,对该方法进行测试.测试结果表明,该方法建立的炉温预测模型在准确性和泛化能力方面具有优势.

关键词：城市固体废物焚烧炉温预测异构特征集成鲁棒建模随机配置网络

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Optimization of extreme ultraviolet vortex beam based on high harmonic generation

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Chinese Physics B 2024年第5期33卷 459-464页

作者：肖礴赵逸文程方晶王革文姜威王一琛胡杰梁红静马日 Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China College of Science Jilin Institute of Chemical TechnologyJilin 132022China

In high harmonic generation(HHG),Laguerre–Gaussian(LG) beams are used to generate extreme ultraviolet(XUV)vortices with well-defined orbital angular momentum(OAM),which have potential applications in fields such as microscopy and *** experimental study on the HHG driven by vortex and Gaussian beams is conducted in this *** is found that the intensity of vortex harmonics is positively correlated with the laser energy and gas *** structure and intensity distribution of the vortex harmonics exhibit significant dependence on the relative position between the gas jet and the laser *** ring-like structures observed in the vortex harmonics,and the interference of quantum paths provide an explanation for the distinct structural ***,by adjusting the relative position between the jet and laser focus,it is possible to discern the contributions from different quantum *** optimization of the HH vortex field is applicable to the XUV,which opens up a new way for exploiting the potential in optical spin or manipulating electrons by using the photon with tunable orbital angular momentum.

关键词： high harmonic generation phase matching extreme ultraviolet vortex beam quantum path interference

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