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Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution processing

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National Science Review 2020年第1期7卷 84-91页

作者： Cong liu Feng An Paria S.M.Gharavi Qinwen Lu Junkun Zha Chao Chen Liming Wang Xiaozhi Zhan Zedong xu Yuan Zhang Ke Qu Junxiang Yao Yun Ou Zhiming Zhao Xiangli zhong Dongwen Zhang Nagarajan Valanoor Lang Chen Tao Zhu Deyang Chen Xiaofang zhai Peng Gao Tingting Jia Shuhong Xie Gaokuo zhong Jiangyu Li Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences School of Materials Science and Engineering Xiangtan University School of Materials Science and Engineering University of New South Wales Hefei National Laboratory for Physical Sciences at Microscale and department of Chemical physics University of Science and Technology of China institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials and Technology South China Academy of Advanced Optoelectronics South China Normal University Dongguan Neutron Science Center department of physics Southern University of Science and Technology International Center for Quantum Materials and Electron Microscopy Laboratory School of Physics Peking University Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment Hunan University of Science and Technology department of physics College of Science National University of Defense Technology beijing National Laboratory for Condensed Matter physics and institute of physics Chinese Academy of Sciences Songshan Lake Materials Laboratory Dongguan Neutron Science Center

Complex oxides with tunable structures have many fascinating properties, though high-quality complex oxide epitaxy with precisely controlled composition is still out of reach. Here we have successfully developed solution-based single-crystalline epitaxy for multiferroic（1-x）BiTi;/;Fe;Mg;/;O;–（x）CaTiO;（BTFM–CTO） solid solution in large area, confirming its ferroelectricity at the atomic scale with strong spontaneous polarization. Careful compositional tuning leads to a bulk magnetization of 0.07 ± 0.035 μB/Fe at room temperature, enabling magnetically induced polarization switching exhibiting a large magnetoelectric coefficient of 2.7–3.0 × 10;s/m. This work demonstrates the great potential of solution processing in large-scale complex oxide epitaxy and establishes novel room-temperature magnetoelectric coupling in epitaxial BTFM–CTO film, making it possible to explore a much wider space of composition,phase, and structure that can be easily scaled up for industrial applications.

关键词： complex oxide solution method epitaxy multiferroic

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Regional ecosystem changes under different cascade hydropower dam construction scenarios in the LRGR

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Chinese Science Bulletin 2007年第A02期52卷 106-114页

作者： zhai HongJuan CUI BaoShan HU Bo WEI GuoLiang liu ShiLiang State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal UniversityBeijing 100875 China

生态系统上的串联水力发出的电力水坝构造的生态的效果与在纵的范围峡区域膨胀水坝发展规模从科学家获得了许多担心。在 Lancang 河区域和纵的范围峡区域(LRGR ) 的 Yuanjiang River-Red 河区域，一个索引系统因此被建立了估计当前的生... 详细信息

生态系统上的串联水力发出的电力水坝构造的生态的效果与在纵的范围峡区域膨胀水坝发展规模从科学家获得了许多担心。在 Lancang 河区域和纵的范围峡区域(LRGR ) 的 Yuanjiang River-Red 河区域，一个索引系统因此被建立了估计当前的生态的危险并且预言可能的未来在水坝构造以后的这二个河区域的生态的危险。八种串联水力发出的电力水坝构造情形为预报在这份报纸被建立了。生态系统的突然的变化特征在计算被考虑了。象水坝构造的当前的供应，航行和旅游一样的经济好处没在计算被考虑。(1 ) 当前的生态的危险 Lancang 河区域和 Yuanjiang River-Red 河区域珍视的结果表演分别地是 0.34 和 0.43，它将在所有计划水坝的联合工作以后分别地升起到 0.900.91 和 0.860.89；(2 ) 突然的变化将在未来发生在 Lancang 河区域和 Yuanjiang River-Red 河区域身上；(3 ) 有高人的反应的间隔建设为 Lancang 河区域和 Yuanjiang River-Red 河区域，他们的多半生态的危险将分别地在以后升起到 0.560.62 和 0.420.43 被推荐。这些结果提供一个合理方法和理论参考书估计水坝建设的生态的效果，并且也把 prewarnings 给正在被计划构造串联水力发出的电力水坝的纵的范围峡区域的另外的主流。

关键词：纵向岭谷区地区生态系统变化模式瀑布

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Artificial intelligence for geoscience:Progress,challenges,and perspectives

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The Innovation 2024年第5期5卷 136-160,135页

作者： Tianjie Zhao Sheng Wang Chaojun Ouyang Min Chen Chenying liu Jin Zhang Long Yu Fei Wang Yong Xie Jun Li Fang Wang Sabine Grunwald Bryan MWong Fan Zhang Zhen Qian Yongjun xu Chengqing Yu Wei Han Tao Sun Zezhi Shao Tangwen Qian Zhao Chen Jiangyuan Zeng Huai Zhang Husi Letu Bing Zhang Li Wang Lei Luo Chong Shi Hongjun Su Hongsheng Zhang Shuai Yin Ni Huang Wei Zhao Nan Li Chaolei Zheng Yang Zhou Changping Huang Defeng Feng Qingsong xu Yan Wu Danfeng Hong Zhenyu Wang Yinyi Lin Tangtang Zhang Prashant Kumar Antonio Plaza Jocelyn Chanussot Jiabao Zhang Jiancheng Shi Lizhe Wang Aerospace Information Research institute Chinese Academy of SciencesBeijing 100094China School of Computer Science China University of GeosciencesWuhan 430078China State Key Laboratory of Mountain Hazards and Engineering Resilience Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610299China Key Laboratory of Virtual Geographic Environment(Ministry of Education of PRC) Nanjing Normal UniversityNanjing 210023China Data Science in Earth Observation Technical University of Munich80333 MunichGermany The National Key Laboratory of Water Disaster Prevention Yangtze Institute for Conservation and DevelopmentHohai UniversityNanjing 210098China institute of Computing Technology Chinese Academy of SciencesBeijing 100190China School of Geographical Sciences Nanjing University of Information Science and TechnologyNanjing 210044China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China Soil Water and Ecosystem Sciences DepartmentUniversity of FloridaPO Box 110290GainesvilleFLUSA Materials Science Engineering Program Cooperating Faculty Member in the department of Chemistry and department of physics Astronomy University of CaliforniaCaliforniaRiversideCA 92521USA institute of Remote Sensing and Geographical Information System School of Earth and Space SciencesPeking UniversityBeijing 100871China Key Laboratory of Computational Geodynamics University of Chinese Academy of SciencesBeijing 100049China International Research Center of Big Data for Sustainable Development Goals Beijing 100094China College of Geography and Remote Sensing Hohai UniversityNanjing 211100China department of Geography The University of Hong KongHong Kong 999077SARChina Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing 210044China School of Environmental Science and Engineering Nanjing University of Information Science&TechnologyNanjing 210044China Collaborative Inno

This paper explores the evolution of geoscientific inquiry,tracing the progression from traditional physics-based models to modern data-driven approaches facilitated by significant advancements in artificial intelligence(AI)and data collection *** models,which are grounded in physical and numerical frameworks,provide robust explanations by explicitly reconstructing underlying physical ***,their limitations in comprehensively capturing Earth’s complexities and uncertainties pose challenges in optimization and real-world *** contrast,contemporary data-driven models,particularly those utilizing machine learning(ML)and deep learning(DL),leverage extensive geoscience data to glean insights without requiring exhaustive theoretical *** techniques have shown promise in addressing Earth science-related ***,challenges such as data scarcity,computational demands,data privacy concerns,and the“black-box”nature of AI models hinder their seamless integration into *** integration of physics-based and data-driven methodologies into hybrid models presents an alternative *** models,which incorporate domain knowledge to guide AI methodologies,demonstrate enhanced efficiency and performance with reduced training data *** review provides a comprehensive overview of geoscientific research paradigms,emphasizing untapped opportunities at the intersection of advanced AI techniques and *** examines major methodologies,showcases advances in large-scale models,and discusses the challenges and prospects that will shape the future landscape of AI in *** paper outlines a dynamic field ripe with possibilities,poised to unlock new understandings of Earth’s complexities and further advance geoscience exploration.

关键词： Earth utilizing landscape

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生菜WOX基因家族的鉴定与分析

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分子植物育种 2024年第6期22卷 1795-1806页

作者：罗康胜张米欢翟兆东刘雪李大勇张彬张德春三峡大学生物技术研究中心宜昌443002 北京市农林科学院蔬菜研究中心北京100097 山东师范大学生命科学学院济南250014

WOX转录因子是植物特异性转录因子。已有研究表明,WOX家族成员在植物生长发育和非生物胁迫响应中起着重要作用,但在生菜(Lactuca sativa L.)中,WOX基因家族的生物学功能研究还很少。本研究在生菜中鉴定到14个可能的LsaWOX基因,分析了他... 详细信息

WOX转录因子是植物特异性转录因子。已有研究表明,WOX家族成员在植物生长发育和非生物胁迫响应中起着重要作用,但在生菜(Lactuca sativa L.)中,WOX基因家族的生物学功能研究还很少。本研究在生菜中鉴定到14个可能的LsaWOX基因,分析了他们的基因结构、蛋白保守基序、三级结构、染色体定位和顺式作用元件等,并将其划分为三个主要分支(如远古支系,中间支系和WUS支系)。本研究对生菜中WOX家族成员进行了鉴定和初步分析,为进一步研究生菜中WOX基因家族的生物学功能提供理论依据。

关键词：生菜(Lactuca sativa) WOX基因家族生物信息学分析

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A theoretical method for solving shock relations coupled with chemical equilibrium and its applications

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Chinese Journal of Aeronautics 2022年第6期35卷 47-62页

作者： Zijian ZHANG Chihyung wen wenshuo ZHANG Yunfeng liu Zonglin JIANG department of Aeronautical and Aviation Engineering The Hong Kong Polytechnic UniversityHong KongChina institute of Mechanics Chinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

In this study,a theoretical method is proposed to solve shock relations coupled with chemical *** only shock waves in dissociated flows but also detonation waves in combustive mixtures can be *** global iterative solving process is specially designed to mimic the physical and chemical process in reactive shock waves to ensure good stability and fast convergence in the proposed *** each global step,the single-variable equations of normal and oblique shock relations are derived and solved with the Newton iteration method to reduce the complexity of the problems,and the minimization of free energy method of NASA(National Aeronautics and Space Administration)is adopted to solve equilibrium *** is demonstrated that the convergent process is stable and very close to the real chemical-kinetic process,and high accuracy is achieved in the solutions of normal and oblique reactive shock ***,the proposed theoretical method has also been applied to many problems associated with reactive shocks,including the stability of oblique detonation wave,bow detonation over a sphere,and shock reflection in dissociated *** great importance of using chemical equilibrium to theoretically predict the theoretical range of the wedge angle for a standing oblique detonation wave(the standing window of the oblique detonation wave),the stand-off distance of bow detonation wave and the transition criterion of shock reflection in dissociated air with high accuracy have been addressed.

关键词： Chemical equilibrium Detonation Dissociated air Shock relation theoretical solution

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低氧和氧化应激对不同来源间充质干细胞旁分泌的差异性影响

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中国组织工程研究 2024年第19期28卷 3024-3030页

作者：潘筱颖许永德刘志强邢晓雯杨勇长春中医药大学吉林省长春市130117 长春中医药大学附属医院泌尿外科吉林省长春市130021 首都医科大学附属北京友谊医院北京市100000 军事科学院军事医学科学院北京市100000

背景:间充质干细胞的生物学行为受所处生存微环境的影响,微环境条件预处理是调控间充质干细胞功能的重要手段。目的:对比氧化应激和低氧条件下脐带间充质干细胞、脂肪间充质干细胞旁分泌功能的差异,为治疗不同疾病选择适当的间充质干细... 详细信息

背景:间充质干细胞的生物学行为受所处生存微环境的影响,微环境条件预处理是调控间充质干细胞功能的重要手段。目的:对比氧化应激和低氧条件下脐带间充质干细胞、脂肪间充质干细胞旁分泌功能的差异,为治疗不同疾病选择适当的间充质干细胞预处理方式提供理论依据。方法:培养脐带间充质干细胞和脂肪间充质干细胞,分别加入不同浓度的H_(2)O_(2)或不同体积分数的O_(2)干预,检测细胞形态、增殖、活力和旁分泌因子表达。结果与结论:①普通培养环境下,脐带间充质干细胞中脑源性神经营养因子和转化生长因子β的表达水平显著高于脂肪间充质干细胞,而脂肪间充质干细胞中基质细胞衍生因子1α和肿瘤坏死因子刺激因子6的表达水平显著高于脐带间充质干细胞;②中低浓度水平(≤100μmol/L)H_(2)O_(2)对2种间充质干细胞活力的影响无显著差异,但H_(2)O_(2)浓度从50μmol/L增至100μmol/L使脐带间充质干细胞中血管内皮生长因子表达水平显著增高,脂肪间充质干细胞中碱性成纤维细胞生长因子、血管内皮生长因子、基质细胞衍生因子1α和白细胞介素10表达水平均显著升高;③体积分数1%O_(2)促进2种间充质干细胞增殖;体积分数1%O_(2)干预24 h后,2种间充质干细胞中基因表达水平均有升高,但脂肪间充质干细胞中血管内皮生长因子、白细胞介素10和肿瘤坏死因子刺激因子6的表达水平显著高于脐带间充质干细胞;④结果提示:低氧和氧化应激预处理可提高间充质干细胞旁分泌功能,但2种间充质干细胞对低氧和氧化应激的响应不同,治疗疾病可选择适合的间充质干细胞预处理方式进一步提升其治疗潜力。

关键词：脐带间充质干细胞脂肪间充质干细胞旁分泌氧化应激低氧

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Stable correlation and robust feature screening

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Science china Mathematics 2022年第1期65卷 153-168页

作者： xu Guo Runze Li Wanjun liu Lixing Zhu School of Statistics Beijing Normal UniversityBeijing 100875China department of Statistics Pennsylvania State UniversityUniversity ParkPA 16802-2111USA Center for Statistics and Data Science Beijing Normal UniversityZhuhai 519085China department of Mathematics Hong Kong Baptist UniversityHong KongChina

In this paper,we propose a new correlation,called stable correlation,to measure the dependence between two random *** new correlation is well defined without the moment condition and is zero if and only if the two random vectors are *** also study its other theoretical *** on the new correlation,we further propose a robust model-free feature screening procedure for ultrahigh dimensional data and establish its sure screening property and rank consistency property without imposing the subexponential or sub-Gaussian tail condition,which is commonly required in the literature of feature *** also examine the finite sample performance of the proposed robust feature screening procedure via Monte Carlo simulation studies and illustrate the proposed procedure by a real data example.

关键词： feature screening nonlinear dependence stable correlation sure screening property

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Phosphorus losses via surface runoff in rice-wheat cropping systems as impacted by rainfall regimes and fertilizer applications

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Journal of Integrative Agriculture 2016年第3期15卷 667-677页

作者： liu Jian ZUO Qiang zhai Li-mei LUO Chun-yan liu Hong-bin WANG Hong-yuan liu Shen ZOU Guo-yuan REN Tian-zhi Key Laboratory of Nonpoint Source Pollution Control Ministry of AgricultureInstitute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences department of Plant Science Pennsylvania State University institute of Plant Nutrition and Resources Beijing Academy of Agriculture and Forestry Sciences institute of Agro-Environmental Protection Ministry of Agriculture

Phosphorus（P） losses from agricultural soils contribute to eutrophication of surface waters. This field plot study investigated effects of rainfall regimes and P applications on P loss by surface runoff from rice（Oryza sativa L.） and wheat（Triticum aestivum L.） cropping systems in Lake Taihu region, china. The study was conducted on two types of paddy soils（Hydromorphic at Anzhen site, Wuxi City, and Degleyed at Xinzhuang site, Changshu City, Jiangsu Province） with different P status, and it covered 3 years with low, high and normal rainfall regimes. Four rates of mineral P fertilizer, i.e., no P（control）, 30 kg P ha^（–1） for rice and 20 kg P ha^（–1） for wheat（P_（30＋20））, 75 plus 40（P_（75＋40））, and 150 plus 80（P_（150＋80））, were applied as treatments. Runoff water from individual plots and runoff events was recorded and analyzed for total P and dissolved reactive P concentrations. Losses of total P and dissolved reactive P significantly increased with rainfall depth and P rates（P〈0.0001）. Annual total P losses ranged from 0.36–0.92 kg ha^–1 in control to 1.13–4.67 kg ha^–1 in P150＋80 at Anzhen, and correspondingly from 0.36–0.48 kg h^–1 to 1.26–1.88 kg ha^–1 at Xinzhuang, with 16–49% of total P as dissolved reactive P. In particular, large amounts of P were lost during heavy rainfall events that occurred shortly after P applications at Anzhen. On average of all P treatments, rice growing season constituted 37–86% of annual total P loss at Anzhen and 28–44% of that at Xinzhuang. In both crop seasons, P concentrations peaked in the first runoff events and decreased with time. During rice growing season, runoff P concentrations positively correlated（P〈0.0001） with P concentrations in field ponding water that was intentionally enclosed by construction of field bund. The relative high P loss during wheat growing season at Xinzhuang was due to high soil P status. In conclusion, P should be applied at rates balancing crop removal（20–30 kg P ha^–1 in this study） and at time

关键词： double cropping system intensive agriculture Lake Taihu region phosphorus loss surface runoff water quality

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大学分析化学教材中紫外-可见吸收光谱产生条件的讨论

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化学教育（中英文） 2024年第16期45卷 108-112页

作者：王中慧任列香周慧刘红云晋卫军吕梁学院化工与材料工程系山西离石033000 北京师范大学化学学院北京100875

在分析化学教材中简要介绍电子跃迁光选律的相关内容,是对选择性吸收知识点的有益补充,有助于学生更全面地理解电子吸收光谱产生的原理,符合当前分析化学发展趋势,也符合以选拔培养基础学科拔尖创新人才为目标的国家强基计划所需。考虑... 详细信息

在分析化学教材中简要介绍电子跃迁光选律的相关内容,是对选择性吸收知识点的有益补充,有助于学生更全面地理解电子吸收光谱产生的原理,符合当前分析化学发展趋势,也符合以选拔培养基础学科拔尖创新人才为目标的国家强基计划所需。考虑到本科生一或二年级的数理水平,以及鉴于部分学生此后可能不再接触到电子吸收光谱的基本理论方面的知识,建议在化学分析和仪器分析课程中分层次引入电子吸收光谱光选律的内容。并建议只作定性的、非数学化描述,同时提供更深入的阅读资料,以便于学习的可持续性。

关键词：紫外-可见吸收光谱光选律跃迁偶极矩分析化学

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An overview for monitoring and prediction of pathogenic microorganisms in the atmosphere

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Fundamental Research 2024年第3期4卷 430-441页

作者： Jianping Huang Danfeng Wang Yongguan Zhu Zifeng Yang Maosheng Yao Xiaoming Shi Taicheng An Qiang Zhang Cunrui Huang Xinhui Bi Jiang Li Zifa Wang Yongqin liu Guibing Zhu Siyu Chen Jian Hang Xinghua Qiu Weiwei Deng Huaiyu Tian Tengfei Zhang Tianmu Chen Sijin liu Xinbo Lian Bin Chen Beidou Zhang Yingjie Zhao Rui Wang Han Li Collaborative Innovation Center for Western Ecological Safety College of Atmospheric SciencesLanzhou UniversityLanzhou 730000China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China National Clinical Research Center for Respiratory Disease Guangzhou Institute of Respiratory HealthFirst Affiliated Hospital of Guangzhou Medical UniversityState Key Laboratory of Respiratory Disease(Guangzhou Medical University)Guangzhou 510230China College of Environmental Sciences and Engineering Peking UniversityBeijing 100871China china CDC Key Laboratory of Environment and Population Health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijing 100021China Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health School of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua UniversityBeijing 100084China Vanke School of Public Health Tsinghua UniversityBeijing 100084China State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China State Key Laboratory of Atmospheric Boundary Layer physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Center for Pan-third Pole Environment Lanzhou UniversityLanzhou 730000China College of Atmospheric Sciences Lanzhou UniversityLanzhou 730000China School of Atmospheric Sciences Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 510640

Corona virus disease 2019(COVID-19)has exerted a profound adverse impact on human *** have demonstrated that aerosol transmission is one of the major transmission routes of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).Pathogenic microorganisms such as SARS-CoV-2 can survive in the air and cause widespread infection among *** monitoring of pathogenic microorganism transmission in the atmosphere and accurate epidemic prediction are the frontier guarantee for preventing large-scale epidemic *** of pathogenic microorganisms in the air,especially in densely populated areas,may raise the possibility to detect viruses before people are widely infected and contain the epidemic at an earlier *** multi-scale coupled accurate epidemic prediction system can provide support for governments to analyze the epidemic situation,allocate health resources,and formulate epidemic response *** review first elaborates on the effects of the atmospheric environment on pathogenic microorganism transmission,which lays a theoretical foundation for the monitoring and prediction of epidemic ***,the monitoring technique development and the necessity of monitoring pathogenic microorganisms in the atmosphere are summarized and ***,this review introduces the major epidemic prediction methods and highlights the significance to realize a multi-scale coupled epidemic prediction system by strengthening the multidisciplinary cooperation of epidemiology,atmospheric sciences,environmental sciences,sociology,demography,*** summarizing the achievements and challenges in monitoring and prediction of pathogenic microorganism transmission in the atmosphere,this review proposes suggestions for epidemic response,namely,the establishment of an integrated monitoring and prediction platform for pathogenic microorganism transmission in the atmosphere.

关键词： Aerosol transmission Epidemic monitoring methods Epidemic prediction modelsEpidemic response Multidisciplinary cooperation

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建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

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