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Rising frequency of ozone-favorable synoptic weather patterns contributes to 2015-2022 ozone increase in Guangzhou

Journal of Environmental Sciences 2025年第2期148卷 502-514页

作者： Nanxi Liu Guowen he Haolin Wang cheng he Haofan Wang Chenxi Liu Yiming Wang Haichao Wang Lei Li Xiao Lu Shaojia Fan School of Atmospheric Sciences Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082China Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary Key Laboratory of Tropical Atmosphere-Ocean System(Sun Yat-sen University)Ministry of EducationZhuhai 519082China

Objective weather classification methods have been extensively applied to identify dominant ozone-favorable synoptic weather patterns(SWPs),however,the consistency of different classification methods is rarely *** this study,we apply two widely-used objective methods,the self-organizing map(SOM)and K-means clustering analysis,to derive ozone-favorable SWPs at four Chinese megacities in *** find that the two algorithms are largely consistent in recognizing dominant ozone-favorable SWPs for four Chinese *** the case of classifying six SWPs,the derived circulation fields are highly similar with a spatial correlation of 0.99 between the two methods,and the difference in themean frequency of each SWP is less than 7%.The six dominant ozone-favorable SWPs in Guangzhou are all characterized by anomaly higher radiation and temperature,lower cloud cover,relative humidity,and wind speed,and stronger subsidence compared to climatology *** find that during 2015-2022,the occurrence of ozone-favorable SWPs days increases significantly at a rate of 3.2 days/year,faster than the increases in the ozone exceedance days(3.0 days/year).The interannual variability between the occurrence of ozone-favorable SWPs and ozone exceedance days are generally consistent with a temporal correlation coefficient of *** particular,the significant increase in ozone-favorable SWPs in 2022,especially the Subtropical High type which typically occurs in September,is consistent with a long-lasting ozone pollution episode in Guangzhou during September *** results thus reveal that enhanced frequency of ozone-favorable SWPs plays an important role in the observed 2015-2022 ozone increase in Guangzhou.

关键词： Ozone(O3) Objective weather classification methods Synoptic weather patterns Trends Guangzhou

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政治动员强化与乡镇治理中的面子竞争

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华南农业大学学报(社会科学版) 2025年第01期24卷 117-126页

作者：何成兵华中师范大学中国农村研究院

干部动员是基层治理研究的重要问题。县乡治理体系的刚性化运转导致了乡镇治理中的政治动员强化，大量工作的推动依赖于政治动员。以情感为基础的面子竞争策略具有强动员性，被广泛运用于任务的分配与落实中，并通过制造场域、制造竞争... 详细信息

干部动员是基层治理研究的重要问题。县乡治理体系的刚性化运转导致了乡镇治理中的政治动员强化，大量工作的推动依赖于政治动员。以情感为基础的面子竞争策略具有强动员性，被广泛运用于任务的分配与落实中，并通过制造场域、制造竞争和制造曝光对镇村干部进行动员，进而形成了政治动员强化的具体实践图景。作为政治动员强化的实践形态，面子竞争策略回应了向上治理的压力、营造了政治动员的氛围以及强化了个体对利益的感知，能够产生政治动员效果，也进一步强化了基层政治动员。在基层权责失衡的结构性困境下，政治动员强化是乡镇政府被动的行动调适策略，但没有触及根本的刚性治权结构，因而面子竞争的回应性存在限度。

关键词：治权刚性政治动员情感动员面子竞争乡镇治理

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证券公司首席经济学家制度的外溢效应研究

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现代金融研究 2025年第2期30卷 89-99,112页

作者：何诚颖吕成双何牧原郭瑞瑾广西大学中国-东盟经济学院/经济学院/中国-东盟金融合作学院南宁530004 嘉兴大学长三角金融科技研究院浙江大学经济学院

本文以2006-2022年中国证券公司为样本,通过构建首席经济学家指标,分析首席经济学家制度的外溢效应。研究发现,首席经济学家制度能提升证券公司服务实体经济的成效。机制检验表明,证券公司声誉负向调节首席经济学家制度对证券公司服务... 详细信息

本文以2006-2022年中国证券公司为样本,通过构建首席经济学家指标,分析首席经济学家制度的外溢效应。研究发现,首席经济学家制度能提升证券公司服务实体经济的成效。机制检验表明,证券公司声誉负向调节首席经济学家制度对证券公司服务实体经济成效的提升作用,信息传递正向调节该提升作用。证券公司为非一线城市公司与非上市公司时,首席经济学家制度对证券公司服务实体经济的成效有显著的正向影响。随机森林模型表明了首席经济学家制度与证券公司服务实体经济成效的非线性关系,验证了解释变量的重要程度和模型的有效性。

关键词：首席经济学家实体经济外溢效应随机森林模型

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肺康复门诊个案管理信息系统的构建与应用

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全科护理 2025年第1期23卷 12-15页

作者：程鹤山东大学齐鲁医院(青岛) 266035

目的:基于决策支持系统及医院住院管理系统(HIS),开发个案管理师决策的肺康复门诊个案管理信息系统,为接受肺康复全程管理的病人建立连续监测电子档案。方法:由护理部、肺康复门诊与信息中心根据门诊开展全流程肺康复个案管理工作的需求... 详细信息

目的:基于决策支持系统及医院住院管理系统(HIS),开发个案管理师决策的肺康复门诊个案管理信息系统,为接受肺康复全程管理的病人建立连续监测电子档案。方法:由护理部、肺康复门诊与信息中心根据门诊开展全流程肺康复个案管理工作的需求,从个案管理师的视角科学设计个案管理电子模块,研发信息化个案管理系统软件,应用于临床实践。结果:构建了门诊收案、评估、会诊、治疗、随访及结案在内的全流程个案管理信息系统,系统应用后个案管理师对该系统的实用性、数据可靠性、决策支持力度、总体满意度评价均较高。结论:个案管理信息系统可为个案管理师提供科学、全流程及决策支持,更高效地帮助其开展门诊个案管理,推动个案管理从“手工文档管理”阶段进入到“数据信息管理”阶段。

关键词：个案管理信息系统肺康复决策支持

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The Minimum Centroid Branch Spanning Tree Problem

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Journal of the Operations Research Society of China 2024年第2期12卷 528-539页

作者： Hao Lin cheng he School of Science Henan University of TechnologyZhengzhou450001HenanChina

For a spanning tree T of graph G,the centroid of T is a vertex v for which the largest component of T-v has as few vertices as *** number of vertices of this component is called the centroid branch weight of *** minimum centroid branch spanning tree problem is to find a spanning tree T of G such that the centroid branch weight is *** application to design of communication networks,the loads of all branches leading from the switch center should be as balanced as *** this paper,we prove that the problem is strongly NP-hard even for bipartite ***,the problem is shown to be polynomially solvable for split graphs,and exact formulae for special graph familis,say Kn_(1),n_(2),...,n_(k)and P_(m)×P_(n),are presented.

关键词： Spanning tree optimization Centroid branch-NP-hardness Polynomial-time algorithm

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Model Updating for High Speed Aircraft in Thermal Environment Using Adaptive Weighted-Sum Methods

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Transactions of Nanjing University of Aeronautics and Astronautics 2016年第3期33卷 362-369页

作者： he Huan he cheng Chen Guoping The State Key Lab of Mechanics and Control for Mechanical Structures Nanjing University of Aeronautics and Astronautics Nanjing 210016 P.R. China Research Institute of Pilotless Aircraft Nanjing University of Aeronautics and Astronautics Nanjing 210016 P.R. China

Model updating for aircraft in a high temperature environment(HTE)is proposed based on the hierarchical *** this method,the problem can be decomposed into temperature field updating and dynamic structural *** order to improve the estimation accuracy,the model updating problem is turned into a multi-objective optimization problem by constructing the objective function which combined with residues of modal frequency and effective modal *** the metamodeling,support vector regression(SVR)is introduced to improve the optimization efficiency,and the solution can be determined by adaptive weighted-sum method(AWS).Finally,the proposed method is tested on a finite element(FE)model of a reentry vehicle *** results show that the multi-objective model updating method in HTE can identify the input parameters of the temperature field and structure with good accuracy.

关键词： hierarchical high temperature environment(HTE) support vector regression(SVR) multi-objective optimization model updating

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Rational design of porous carbon allotropes as anchoring materials for lithium sulfur batteries

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Journal of Energy Chemistry 2021年第1期30卷 121-129,I0005页

作者： Tongtong Li cheng he Wenxue Zhang State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049ShaanxiChina School of Materials Science and Engineering Chang’an UniversityXi’an 710064ShaanxiChina

The shuttle effect seriously impedes the development and practical application of lithium sulfur(Li-S)*** is still a long-term challenge to find effective anchoring materials to hinder the shuttle effect of Li-S *** carbon allotrope as anchoring materials is an effective strategy to alleviate the shuttling ***,the influence factors of carbon allotrope on the adsorption performance of LIPSS at the atomic level are not clear,which limits the application of carbon allotrope in Li-S ***,using first-principles simulations,a systematical calculation of carbon allotropes with various ring size(6 ≤S≤16) and shape is conducted to understand the adsorption *** results show that the T-G monolayers with suitable ring structure and high charge transfer can significantly enhance the interaction between the monolayer and LiPSs,allowing them to have high capacity and high coulombic *** diffusion studies show that LiPSs on the T-G monolayer have the low diffusion barriers,which ensures the charging and discharging rate of *** studies could provide material design principles of carbon allotrope monolayers used as anchoring materials of the high performance Li-S batteries.

关键词： Lithium-sulfur battery Anchoring material Shuttle effect Density functional theory

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Building up a general selection strategy and catalytic performance prediction expressions of heteronuclear double-atom catalysts for N_(2)reduction

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Journal of Energy Chemistry 2023年第7期82卷 375-386,I0009页

作者： Yibo Wu cheng he Wenxue Zhang State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi'an Jiaotong UniversityXi'an 710049ShannxiChina School of Materials Science and Engineering Chang'an UniversityXi'an 710064ShannxiChina

The severe environmental problems and the demand for energy urgently require electrocatalysis to replace Haber-Bosch for the nitrogen reduction reaction(NRR).The descriptors and important properties of single-atom and homonuclear double-atom catalysts have been preliminarily explored,but the relationship between the inherent properties and catalytic activity of heteronuclear double-atom catalysts with better performance remains ***,it is very significant to explore the prediction expressions of catalytic activity of heteronuclear double-atom catalysts based on their inherent properties and find the rule for selecting catalytic ***,by summarizing the free energy for the key steps of NRR on 55 catalysts calculated through the first-principle,the expressions of predicting the free energy and the corresponding descriptors are deduced by the machine learning,and the strategy for selecting the appropriate catalytic center is *** selection strategy for the central atom of heteronuclear double-atom catalysts is that the atomic number of central B atom should be between group VB and VIIIB,and the electron difference between central A atom and B atom should be large enough,and the selectivity of NRR or hydrogen evolution reaction(heR)could be calculated through the prediction ***,five catalysts are screened to have low limiting potential and excellent selectivity,and are further analyzed by electron *** work explores the relationship between the inherent properties of heteronuclear double-atom catalysts and the catalytic activity,and puts forward the rules for selecting the heteronuclear double-atom catalytic center,which has guiding significance for the experiment.

关键词： heteronuclear double-atom catalyst Nitrogen reduction reaction Density functional theory Prediction expression Selection strategy

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民办高校学生学习现状与改善对策研究——以蚌埠工商学院为例

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湖北开放职业学院学报 2025年第1期38卷 49-51页

作者：何程林方敏蚌埠工商学院财务与审计学院安徽蚌埠233040 蚌埠工商学院安徽蚌埠233040

大学阶段的学习态度、学习习惯和学习主动性直接影响大学生的学习效果,对在校大学生学习能力、知识结构和健全人格的培养至关重要。本研究以蚌埠工商学院在校大学生为样本,采用问卷调查的方式进行实证调研。从总体来看,大学生学习状况良... 详细信息

大学阶段的学习态度、学习习惯和学习主动性直接影响大学生的学习效果,对在校大学生学习能力、知识结构和健全人格的培养至关重要。本研究以蚌埠工商学院在校大学生为样本,采用问卷调查的方式进行实证调研。从总体来看,大学生学习状况良好,但是部分学生学习态度不容乐观,自制力不强。因此,结合学校实际,从加强思想政治教育,夯实理想信念根基;加强“六个坚持”落实力度,夯实良好习惯养成;加强师资队伍建设,提升学校育人水平;加强班级学风建设,提升学生学习能力四个方面提出改善措施。

关键词：大学生学习状况学习态度

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“Capture-activation-recapture” mechanism-guided design of double-atom catalysts for electrocatalytic nitrogen reduction

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Journal of Energy Chemistry 2024年第9期96卷 437-447页

作者： cheng he Shiqi Yan Wenxue Zhang State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049ShaanxiChina School of Materials Science and Engineering Chang’an UniversityXi’an 710064ShaanxiChina

Compared with the traditional industrial nitrogen fixation, electrocatalytic methods, especially those utilizing double-atom catalysts containing nonmetals, can give good consideration to the economy and environmental protection. However, the existing “acceptance-donation” mechanism is only applicable to bimetallic catalysts and nonmetallic double-atom catalysts containing boron atoms. herein, a novel “capture-activation-recapture” mechanism for metal-nonmetal double-atom catalyst is proposed to solve the problem by adjusting the coordination environments of nonmetallic atoms and utilizing the activation effect of metal atoms on nitrogen. Based on this mechanism, the nitrogen reduction reaction (NRR) activity of 48 structures is calculated by density functional theory calculation, and four candidates are selected as outstanding electrocatalytic nitrogen reduction catalysts: Si-Fe@NG (U_(L) = –0.14 V), Si-Co@NG (U_(L)= –0.15 V), Si-Mo@BP1 (U_(L) = 0 V), and Si-Re@BP1 (U_(L) = –0.02 V). The analyses of electronic properties further confirm “capture-activation-recapture” mechanism and suggest that the difference in valence electron distribution between metal and Si atoms triggers the activation of N≡N bonds. In addition, a machine learning approach is utilized to generate an expression and an intrinsic descriptor that considers the coordination environment to predict the limiting potential. This study offers profound insight into the synergistic mechanism of TM and Si for NRR and guidance in the design of novel double-atom nitrogen fixation catalysts.

关键词： "Capture-activation-recapture"mechanism Double-atom catalyst Nitrogen reduction reaction Density functional theory

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