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Quantitative contributions of climate change and human activities to vegetation dynamics in the Zoige Plateau from 2001 to 2020

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Journal of Mountain Science 2024年第9期21卷 3031-3046页

作者： GAO Bing LIU Enqin yang yang yang Man yao yang GUAN Lei FENG Yiwen College of Geography and Planning Chengdu University of TechnologyChengdu 610059China Key Laboratory of Smart Earth Beijing 100029China sichuan Provincial Soil and Water Conservation Ecological Environment Monitoring Station Chengdu 610041China College of Earth and Planetary Sciences Chengdu University of TechnologyChengdu 610059China

Climate change and human activities such as overgrazing and rapid development of tourism simultaneously affected the vegetation of the Zoige ***,the spatiotemporal variations of vegetation and the relative contributions of climate change and human activities to these vegetation dynamics remain ***,clarifying how and why the vegetation on the Zoige Plateau changed can provide a scientific basis for the sustainable development of the ***,we investigate NDVI trends using the Normalized Difference Vegetation Index(NDVI)as an indicator of vegetation greenness and distinguish the relative effects of climate changes and human activities on vegetation changes by utilizing residual trend analysis and the *** find a tendency of vegetation greening from 2001 to 2020,with significant greening accounting for 21.44%of the entire ***,browning area expanded rapidly after *** temperatures are the primary driver of vegetation changes in the Zoige *** variations and human activities were responsible for 65.57%and 34.43%of vegetation greening,and 39.14%and 60.86%of vegetation browning,respectively,with browning concentrated along the Yellow,Black and White *** to 2001-2010,the inhibitory effect of human activity and climate fluctuations on vegetation grew dramatically between 2011 and 2020.

关键词： Vegetation change Climate change Residual trend analysis Geodetector Human activities Zoige plateau

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Progress and prospects of pH-neutral aqueous organic redox flow batteries:Electrolytes and membranes

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Journal of Energy Chemistry 2024年第9期96卷 89-109页

作者： Kang Peng Gonggen Tang Chao Zhang Xian yang Peipei Zuo Zhanfeng Xiang Zhong yao Zhengjin yang Tongwen Xu Key Laboratory of Precision and Intelligent Chemistry Department of Applied ChemistrySchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026AnhuiChina Suqian Time Energy Storage Technology Co. Ltd.Suqian 223800JiangsuChina

Aqueous organic redox flow batteries(AORFBs),which exploit the reversible electrochemical reactions of water-soluble organic electrolytes to store electricity,have emerged as an efficient electrochemical energy storage technology for the grid-scale integration of renewable ***-neutral AORFBs that feature high safety,low corrosivity,and environmental benignity are particularly promising,and their battery performance is significantly impacted by redox-active molecules and ion-exchange membranes(IEMs).Here,representative anolytes and catholytes engineered for use in pH-neutral AORFBs are outlined and summarized,as well as their side reactions that cause irreversible battery capacity *** addition,the recent achievements of IEMs for pH-neutral AORFBs are discussed,with a focus on the construction and tuning of ion transport ***,the critical challenges and potential research opportunities for developing practically relevant pH-neutral AORFBs are presented.

关键词： Aqueous organic redox flow battery pH-Neutral Anolyte Catholyte Membrane

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Computing-aware network (CAN): a systematic design of computing and network convergence

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Frontiers of Information Technology & Electronic Engineering 2024年第5期25卷 633-644页

作者： Xiaoyun WANG Xiaodong DUAN Kehan yao Tao SUN Peng LIU Hongwei yang Zhiqiang LI China Mobile Communications Corporation Beijing 100032China China Mobile Research Institute Beijing 100053China

The coverage of network resources is increasingly extensive,and computing resources have likewise gradually become fundamental infrastructures,providing ubiquitous computing ***,in wide area networks(WANs),the underlying network and computing resources are not closely investigated or co-designed,and there are still problems reflected in slow computing service scheduling,inflexible data distribution,and inefficient data transmission.

关键词： computing network service

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Hybridization chain reaction-based DNA nanomaterials for biosensing,bioimaging and therapeutics

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Chinese Chemical Letters 2024年第2期35卷 223-231页

作者： Zhaoyue Lv Mengxue Huang Peiran Li Mengdi Xu Chi yao Dayong yang Frontiers Science Center for Synthetic Biology Key Laboratory of Systems Bioengineering (MOE)Institute of Biomolecular and Biomedical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Zhejiang Institute of Tianjin University Ningbo 315201China

DNA nanomaterials hold great promise in biomedical fields due to its excellent sequence programmability,molecular recognition ability and *** chain reaction(HCR)is a simple and efficient isothermal enzyme-free amplification strategy of DNA,generating nicked double helices with repeated *** the design of HCR hairpins,multiple nanomaterials with desired functions are assembled by DNA,exhibiting great potential in biomedical ***,the recent progress of HCR-based DNA nanomaterials for biosensing,bioimaging and therapeutics are *** works are exemplified to demonstrate how HCR-based DNA nanomaterials are designed and *** challenges and prospects of the development of HCR-based DNA nanomaterials are *** envision that rationally designing HCR-based DNA nanomaterials will facilitate the development of biomedical applications.

关键词： DNA nanotechnology Hybridization chain reaction DNA nanomaterials Biosensing Bioimaging Therapeutics

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反腐败影响了企业捐赠吗?——基于政治关联视角的微观解释

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中央财经大学学报 2017年第1期 115-128页

作者：党力刘诚杨思瑶中国人民大学经济学院中国社会科学院财经战略研究院华融证券股份有限责任公司人力资源部

笔者利用2010—2014年沪市上市公司数据,从政治关联的角度出发,研究了反腐败对企业捐赠的影响。在中国,寻求政治关联是企业发展主要手段之一,捐赠也被认为是企业谋求政治关联的重要方式。反腐败势必会通过削弱企业谋求政治关联的激励,... 详细信息

笔者利用2010—2014年沪市上市公司数据,从政治关联的角度出发,研究了反腐败对企业捐赠的影响。在中国,寻求政治关联是企业发展主要手段之一,捐赠也被认为是企业谋求政治关联的重要方式。反腐败势必会通过削弱企业谋求政治关联的激励,影响企业的捐赠行为。以2012年末以来中国政府反腐败的政策实验为契机,笔者采用双重差分的方法 (DID)研究了反腐败对于企业的捐赠的影响。结果发现,反腐败降低了企业捐赠,对于政治关联强的企业,反腐败的作用更大。进一步研究表明,反腐败对企业捐赠的削弱作用仅存在于市场化程度较高的地区。而在市场化程度低的地区,企业发展方式单一,对政治关联的依赖性较大,反腐败没能够显著地削弱企业谋求政治关联的激励,降低企业的捐赠水平。笔者的研究不仅为反腐败如何影响企业捐赠提供了一个微观视角,对重新理解反腐败的经济效果也具有一定启发性。

关键词：反腐败企业捐赠政治关联市场化进程

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Active sites and reaction mechanisms of COhydrogenation on zinc-based mixed oxide catalysts

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Science China Chemistry 2024年

作者： Zhuo-Yan yao si-Cong Ma Zhi-Pan Liu Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Key Laboratory of Computational Physical ScienceDepartment of Chemistry Fudan University State Key Laboratory of Metal Organic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai Qi Zhi Institution

The conversion of C1 molecules, COx（CO and CO2）, to valuable chemical products has garnered ever-increasing *** many routes, the hydrogenation via thermal catalysis is particularly promising as a key clean energy technology with the increasing supply of green H2. Zinc-based mixed oxide catalysts exhibit exceptional catalytic performance in the COxhydrogenation to value-added hydrocarbons, especially in combination with zeolite. This review overviews the recent achievements in understanding the active sites and reaction mechanisms of COxhydrogenation on zinc-based mixed oxide catalysts, focusing on three most-studied zinc-based mixed oxide catalysts, namely ZnCrOx, ZnAlOxand ZnZrOx. The challenges and future directions are also discussed.

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Total Synthesis and Stereochemical Assignment of Talaroconvolutin A and Talarofuranone: Gram-scale Synthesis of Ferroptosis Inducer Talaroconvolutin A

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Chinese Journal of Chemistry 2024年第13期42卷 1509-1514页

作者： Ming yao Wei yang Jing Li Chengyun Huang Jin Fang Sulu Qin Shuzhi Liu Xiaolong yang School of Pharmaceutical Sciences South-Central Minzu UniversityWuhanHubei 430074China

The first total synthesis of talaroconvolutin A(1.1 g obtained)and talarofuranone has been achieved using accessible materials(12 steps,7.5%and 8.2%yields,respectively).Convergent routes involved intramolecular Diels-Alder reactions in two approaches for creating the decalin ***,an unprecedented DMP-mediated domino reaction resulted in the deoxy-tetramic acid *** syntheses not only establish the absolute configuration of talaroconvolutin A but also enable further collaborative studies of this typeofferroptosisinducers.

关键词： Natural products Aldehydes Total synthesis Domino reactions Biological activity Antitumor agents Ferroptosis Diels-Alder reaction Talaroconvolutin A

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Analytical solution for the effective elastic properties of rocks with the tilted penny-shaped cracks in the transversely isotropic background

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Petroleum Science 2024年第1期21卷 221-243页

作者： Zheng-Qian Ma Xing-yao Yin Zhao-Yun Zong Yuan-Yuan Tan Ya-Ming yang National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao266580ShandongChina School of Geosciences China University of Petroleum(East China)Qingdao 266580ShandongChina Pilot National Laboratory for Marine Science and Technology(Qingdao) Qingdao266200ShandongChina

Seismic prediction of cracks is of great significance in many disciplines,for which the rock physics model is ***,up to now,multitudinous analytical models focus primarily on the cracked rock with the isotropic background,while the explicit model for the cracked rock with the anisotropic background is rarely investigated in spite of such case being often encountered in the ***,we first studied dependences of the crack opening displacement tensors on the crack dip angle in the coordinate systems formed by symmetry planes of the crack and the background anisotropy,respectively,by forty groups of numerical *** on the conclusion from the experiments,the analytical solution was derived for the effective elastic properties of the rock with the inclined penny-shaped cracks in the transversely isotropic ***,we comprehensively analyzed,according to the developed model,effects of the crack dip angle,background anisotropy,filling fluid and crack density on the effective elastic properties of the cracked *** analysis results indicate that the dip angle and background anisotropy can significantly either enhance or weaken the anisotropy degrees of the P-and SH-wave velocities,whereas they have relatively small effects on the SV-wave velocity ***,the filling fluid can increase the stiffness coefficients related to the compressional modulus by reducing crack compliance parameters,while its effects on shear coefficients depend on the crack dip *** increasing crack density reduces velocities of the dry rock,and decreasing rates of the velocities are affected by the crack dip *** comparing with exact numerical results and experimental data,it was demonstrated that the proposed model can achieve high-precision estimations of stiffness ***,the assumption of the weakly anisotropic background results in the consistency between the proposed model and Hudson's published theory for the or

关键词： Effective elastic property Tilted crack Transverse isotropy Analytical solution Crack opening displacement

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Mycoplasma hominis Pneumonia Presented as a Cavitary Mass with a Halo sign in an Immunocompetent Adult Male:A Case Report

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Infectious Diseases & Immunity 2024年第3期4卷 142-145页

作者： Pan-Pan Xie yao yao Ning yang Wen-Kai Niu Xin Yuan Department of Respiratory and Critical Care Diseases Senior Department of Infectious Diseasesthe Fifth Medical Center of Chinese PLA General HospitalNational Clinical Research Center for Infectious DiseasesBeijing 100039China Anhui Medical University PLA 307 Clinical College Beijing 100039China.

Mycoplasma hominis is an opportunistic microorganism that colonizes the genitourinary tract and causes genitourinary ***,pulmonary infections caused by *** have rarely been reported in immunocompetent ***,we report a rare case of an immunocompetent adult male with *** pneumonia who presented with multiple pulmonary nodules that progressed to a cavitary mass with a halo *** presence of *** infection was confirmed using multiplex polymerase chain reaction(mPCR)of the bronchoalveolar lavage *** patient demonstrated no response to the initial levofloxacin therapy;however,the symptoms subsequently improved after the administration of *** may be an underestimated causative agent of community-acquired pneumonia of unknown etiology in immunocompetent adults,and the involvement of the organism should be especially suspected in sexually active *** diagnostic methods,such as mPCR,can be used to identify the etiology of atypical *** antibiotics are crucial for effective treatment.

关键词： M.hominis Halo sign Cavitary pneumonia Extragenital infections Case report

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Detection Method for Cascading Failure of Power Systems Based on Epidemic Model

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1356-1370页

作者： Jian Xu Zhonghao He siyang Liao Yuanzhang Sun Liangzhong yao Deping Ke Jun yang School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China IEEE

The early detection of cascading failure plays an important role in the safe and stable operation of the power system with high penetration of renewable *** paper proposes a fault propagation dynamic model based on the epidemic model,and further puts forward a method to detect the development of cascading *** the simulation of the IEEE 39-bus and 118-bus systems,this model is proven to be valid and capable of providing practical technical support for the prevention of cascading failures in power systems with high penetration of renewable *** paper also provides an analysis method for the choice of different protection and control measures at each stage of cascading failure,which has critical significance and follow-up value.

关键词： Cascading failure complex network epidemic model fault propagation renewable energy weight method of game theory

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