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Effects of the seasonal variation in chlorophyll concentration on sea surface temperature in the global ocean

Acta Oceanologica Sinica 2021年第11期40卷 50-61页

作者： Jinfeng ma Hailong Liu Pengfei Lin Haigang zhan State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Southern marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China State Key Laboratory of Tropical Oceanography South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China

The effects of biological heating on the upper-ocean temperature of the global ocean are investigated using two ocean-only experiments forced by prescribed atmospheric fields during 1990–2007,on with fixed constant chlorophyll concentration,and the other with seasonally varying chlorophyll *** the existence of high chlorophyll concentrations can trap solar radiation in the upper layer and warm the surface,cooling sea surface temperature(SST)can be seen in some regions and *** regions are selected and classified according to their dynamic processes,and the cooling mechanisms are investigated through heat budget *** chlorophyll-induced SST variation is dependent on the variation in chlorophyll concentration and net surface heat flux and on such dynamic ocean processes as mixing,upwelling and *** mixed layer depth is also an important factor determining the *** chlorophyll-induced SST warming appears in most regions during the local spring to autumn when the mixed layer is shallow,e.g.,low latitudes without upwelling and the ***-induced SST cooling appears in regions experiencing strong upwelling,e.g.,the western Arabian Sea,west coast of North Africa,South Africa and South America,the eastern tropical Pacific Ocean and the Atlantic Ocean,and strong mixing(with deep mixed layer depth),e.g.,the mid-latitudes in winter.

关键词： sea surface temperature heat budget upwelling mixing biological heating

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不同水深梯度下沉水植物关键限制因子的差异性研究--以太湖东山湾为例

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湖泊科学 2025年第1期37卷 171-183页

作者：陈思文姜磊马书占吴越詹洪新叶祺常以恒陈开宁中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室南京211135 中国科学院大学北京100049 苏州科技大学江苏省水处理技术与材料协同创新中心苏州215009 江苏省环境科学研究院生态环境部长江中下游水生态健康重点实验室南京210036 江苏省常州市溧阳生态环境局溧阳213399

沉水植物是浅水湖泊生态系统的重要组成部分,其分布格局受环境因子,特别是水深的影响;不同水深梯度下,影响沉水植物生长的关键因子也存在差异性,并与水深一起对沉水植物产生协同作用。本研究选取太湖东部典型的草型湖区——东山湾为研... 详细信息

沉水植物是浅水湖泊生态系统的重要组成部分,其分布格局受环境因子,特别是水深的影响;不同水深梯度下,影响沉水植物生长的关键因子也存在差异性,并与水深一起对沉水植物产生协同作用。本研究选取太湖东部典型的草型湖区——东山湾为研究区域,于2020年10月2021年6月对31处不同水深的样点进行了3次野外调查,主要指标包括水体理化因子与沉水植物种类及丰度。采用单因素方差分析、Spearman相关性分析和冗余分析方法对不同水深处沉水植物与环境因子的关系进行分析,确定了不同水深湖区中影响沉水植物群落组成的关键环境因子。结果表明:1)水体的理化指标表现出明显的时空差异。太湖东山湾近岸浅水区水体叶绿素a(Chl.a)浓度和透明度与水深之比(SD/WD)的均值显著高于近湖心较深的水域;春季水体总氮(TN)、硝态氮、总磷(TP)、磷酸盐和悬浮颗粒物浓度明显高于秋季和夏季。2)调查共记录到东山湾12个种类的沉水植物,中间水域的沉水植物频度更高,不同水深区域内的沉水植物群落表现出物种组成差异,竹叶眼子菜(Potamogeton wrightii/Potamogenton malaianus)、苦草(Vallisneria natans)和轮叶黑藻(Hydrilla verticillata)在近湖心区表现出更高的频度与丰度。3)影响东山湾沉水植物群落的关键水环境因子包括水深、TN、TP、SD/WD和Chl.a,且不同水深区域的沉水植物群落组成受到不同水环境因子调控。水深较浅的近岸区域影响沉水植物生长的关键环境因子包括水深和Chl.a;中间水域的沉水植物主要受到水体TN和TP的影响;而水深更深的近湖心区域沉水植物则与水深、TN和TP呈显著相关关系。本研究结果为浅水湖泊水位管理以及不同水深条件下的沉水植物恢复提供了重要的理论依据。

关键词：太湖沉水植物群落水深限制因子

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Velocity and Temperature of In-Flight Particles and Its Significance in Determining the Microstructure and Mechanical Properties of TBCs

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Acta Metallurgica Sinica(English Letters) 2019年第10期32卷 1269-1280页

作者： Lei zhang Tao He Yu Bai Fang-Li Yu Wei Fan Yu-shan ma zhan-Dong Chang Hai-Bo Liu Ben-Qiang Li State Key Laboratory for Mechanical Behavior of materials Xi'an Jiaotong University Xi'an 710049 China Wuzhong Instrument Co. Ltd Wu Zhong 751100 China School of materials Engineering Xi'an Aeronautical University Xi'an 710077 China Department of Mechanical Engineering University of Michigan Dearborn MI 4812& USA

The correlation between particle in-flight parameter, defect content and mechanical property of yttria-stabilized zirconia coating was systematically studied in the present work. The melting state of in-flight particle during spraying was simulated using computational fluid dynamics. The results suggested that, with the increase of velocity and temperature of in-flight particles in the plasma jet, the particles changed from partially melted state to fully melted one. As a result, the total defect content of as-sprayed coating gradually decreased, while elastic modulus and microhardness increased correspondingly. However, the fracture toughness of as-sprayed coating reached a maximum value when the total defect content reached approximately 9.1%.

关键词： Yttria-stabilized zirconia Thermal barrier coating Defect content Computational fluid dynamics Mechanical property

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Secular trend and projection of overweight and obesity among Chinese children and adolescents aged 7-18 years from 1985 to 2019: Rural areas are becoming the focus of investment

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中华医学杂志(英文版) 2025年第03期

作者： Dang Jiajia Liu Yunfei Cai shan Zhong Panliang Shi Di Chen Ziyue zhang Yihang Dong Yanhui ma Jun Song Yi Institute of Child and Adolescent Health School of Public Health Peking University Beijing China National Health Commission Key Laboratory of Reproductive Health Peking University Beijing China

Background: The urban-rural disparities in overweight and obesity among children and adolescents are narrowing, and there is a need for long-term and updated data to explain this inequality, understand the underlying mechanisms, and identify priority groups for ***: We analyzed data from seven rounds of the Chinese National Survey on Students Constitution and Health (CNSSCH) conducted from 1985 to 2019, focusing on school-age children and adolescents aged 7-18 years. Joinpoint regression was used to identify inflection points (indicating a change in the trend) in the prevalence of overweight and obesity during the study period, stratified by urban/rural areas and sex. Annual percent change (APC), average annual percent change (AAPC), and 95% confidence interval (CI) were used to describe changes in the prevalence of overweight and obesity. Polynomial regression models were used to predict the prevalence of overweight and obesity among children and adolescents in 2025 and 2030, considering urban/rural areas, sex, and age ***: The prevalence of overweight and obesity in urban boys and girls showed an inflection point of 2000, with AAPC values of 10.09% (95% CI: 7.33-12.92%,t = 7.414,P mately 2027. A similar pattern is observed for urban and rural girls, with a prevalence of overweight and obesity reaching 20.86% in ***: The prevalence of overwei

关键词： Children and adolescents Overweight Obesity Urban-rural inequality Prevalence Prediction

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New measurement of ^(63)Cu(γ,n)^(62)Cu cross-section using quasi-monoenergeticγ-ray beam

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Nuclear Science and Techniques 2025年第2期36卷 131-140页

作者： Zhi-Cai Li Zi-Rui Hao Qian-Kun Sun Yu-Long Shen Long-Xiang Liu Hang-Hua Xu Yue zhang Pu Jiao Meng-Die Zhou Yu-Xuan Yang Sheng Jin Kai-Jie Chen Zhen-Wei Wang shan Ye Xin-Xiang Li Chun-Wang ma Hong-Wei Wang Gong-Tao Fan Wen Luo School of Nuclear Science and Technology University of South ChinaHengyang 421001China shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Science Beijing 100049China School of Physics Henan Normal UniversityXinxiang 453007China China Institute of Atomic Energy Beijing 102413China Institute of Nuclear Science and Technology Henan Academy of SciencesZhengzhou 450046China

We present new data on the^(63)Cu(γ,n)cross-section studied using a quasi-monochromatic and energy-tunableγbeam produced at the shanghai Laser Electron Gamma Source to resolve the long-standing discrepancy between existing measurements and evaluations of this *** an unfolding iteration method,^(63)Cu(γ,n)data were obtained with an uncertainty of less than 4%,and the inconsistencies between the available experimental data were ***γ-ray strength function of^(63)Cu(γ,n)was successfully extracted as an experimental *** further calculated the cross-section of the radiative neutron capture reaction^(62)Cu(n,γ)using the TALYS *** calculation method enables the extraction of(n,γ)cross-sections for unstable nuclides.

关键词： ^(63)Cu(γ n)reaction Cross-section data Quasi-monochromaticbeam Radiative neutron capture reaction

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构建新时代医学院校发展型资助育人体系的探索

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大学教育 2025年第2期 11-16,21页

作者：钟珊马晓强张健南京医科大学江苏南京211166

文章基于高等医学教育的特点和学生资助工作实际,分析了在从保障型资助向发展型资助过渡的过程中,高校学生资助育人工作尚存在工作对象界定不够明确、服务基础不够扎实、服务内容不够全面、工作机制不够严谨、条件保障不够到位等现实困... 详细信息

文章基于高等医学教育的特点和学生资助工作实际,分析了在从保障型资助向发展型资助过渡的过程中,高校学生资助育人工作尚存在工作对象界定不够明确、服务基础不够扎实、服务内容不够全面、工作机制不够严谨、条件保障不够到位等现实困境,提出医学院校要从明确服务对象、夯实服务基础、丰富服务内容、优化工作机制、加强条件保障等方面入手,不断推进发展型资助育人体系的构建,促使学生素质和综合能力得到全面和可持续发展。

关键词：新时代医学院校发展型资助育人学生资助

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Grain refinement of Mg-Al alloys inoculated by MgAl_(2)O_(4)powder

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Journal of magnesium and Alloys 2021年第4期9卷 1215-1223页

作者： Hengbin Liao Meiyan zhan Chengbo Li Zhiqiang ma Jun Du Department of Metallic materials School of Materials Science and EngineeringSouth China University of TechnologyWu Shan Road 381Tianhe DistrictGuangzhou 510640China

As a potent nucleating substrate forα-Mg grain,MgAl_(2)O_(4) powder was used to inoculate the Mg-Al melt in this *** effects of MgAl_(2)O_(4)amount,holding time and Al content on the grain size and grain refining ratio of the inoculated Mg-Al alloys are systematically *** results show that the minimum grain size of Mg-3Al alloy is achieved by adding 2wt.%MgAl_(2)O_(4)powder and this alloy exhibits higher grain refining ratio than Mg-5Al and Mg-8Al *** crystallographic misfit calculation indicates the wellmatching and possible orientation relationships(ORs)betweenα-Mg and MgAl_(2)O_(4).Among these predicted ORs,[10–10]α−Mg//[110]MgAl2O4 in(0002)α−Mg//(1–13)MgAl2O4 possesses the smallest misfit,i.e.,2.34%(fr).Both results of the experiment and crystallographic calculation demonstrate that the grain refinement of Mg-Al alloys is attributed to the MgAl_(2)O_(4)particles acting as the heterogeneous nucleation substrates forα-Mg grains.

关键词： Grain refinement Inoculation Heterogeneous nucleation Mg-Al alloys MgAl_(2)O_(4)

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Aptamer-functionalized nanoplatforms overcoming temozolomide resistance in synergistic chemo/photothermal therapy through alleviating tumor hypoxia

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Nano Research 2023年第7期16卷 9859-9872页

作者： Yun Zeng Linfei Zhao Ke Li Jingwen ma Dan Chen Changhu Liu Wenhua zhan Yonghua zhan School of Life Science and Technology Xidian University and Engineering Research Center of Molecular and Neuro ImagingMinistry of EducationXi’an 710126China Department of Radiation Oncology General Hospital of Ningxia Medical UniversityYinchuan 750004China International Joint Research Center for Advanced Medical Imaging and Intelligent Diagnosis and Treatment and Xi’an Key Laboratory of Intelligent Sensing and Regulation of trans-Scale Life Information School of Life Science and TechnologyXidian UniversityXi’an 710126China Xi’an Key Laboratory for Prevention and Treatment of Common Aging Diseases Translational and Research Centre for Prevention and Therapy of Chronic DiseaseInstitute of Basic and Translational MedicineXi’an Medical UniversityXi’an 710021China Radiology Department CT and MRI RoomNinth Hospital of Xi’anXi’an 710054China

Tumor hypoxia is intimately associated with gliomas,which represents a significant threat to human health and are resistant to the first-line chemotherapeutic drug temozolomide(TMZ)due to *** this work,to overcome TMZ resistance in orthotopic gliomas,aptamer-functionalized liposomes are manufactured to encapsulate TMZ and photothermal agent IR780,and can cross the blood-brain barrier and actively target *** is possible to employ liposomes for both fluorescence and photoacoustic imaging simultaneously due to their stability and excellent photothermal conversion *** chemo/photothermal synergistic therapeutic effect of liposomes on gliomas is demonstrated by their abilities to target orthotopic gliomas,alleviate tumor hypoxia and consequently reverse resistance of glioma cells to TMZ,thereby extending the survival time of tumor-bearing mice,making the nanoplatforms and their synergistic chemo/photothermal therapy as a potential clinical treatment for gliomas.

关键词： aptamers blood-brain barrier gliomas liposomes photothermal therapy

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Copper（I）-Catalyzed Asymmetric [3＋2]-Cycloaddition of α-Substituted Iminoesters with α-Trifluoromethyl α,β-Unsaturated Esters

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Chinese Journal of Chemistry 2018年第5期36卷 421-429页

作者： shan Xu Bing Liu zhan-Ming zhang Bing Xu Junliang zhang shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University 3663 North Zhongshan Road Shanghai 200062 China

Reported herein is an example of highly regio-, diastereo-and enantioselective Cu（I）-catalyzed intermolecular [3＋2] cycloaddition reaction of a-substituted iminoesters with α-trifluoromethyl α,β-unsaturated esters. This novel strategy provided a facile access to pyrrolidines with two skipped （aza）quaternary stereocenters including a CF3 all-carbon quaternary stereocenter. A broad substrate scope was observed and high yields （up to 94%） with excellent diastereoselectivity （up to 〉20 ： 1 d.r.） and enantioselectivity （up to 98% ee） were obtained.

关键词： tminoesters [3+2] cycioaddition (aza)quaternary stereocenters

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商用飞机复合超级壁板数字化测量技术研究

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自动化技术与应用 2025年第2期44卷 110-114页

作者：王宏博马煜亮唐珊珊中航西安飞机工业集团股份有限公司陕西西安710000

为提高飞机装配质量,便于装配过程的反馈调整,提出商用飞机复合超级壁板数字化测量技术研究。分析壁板的组成结构与结构特征,减少测量过程中对壁板造成损害,利用红光光束、分束镜等装置建立激光雷达扫描系统,通过点云数据配准,提高测量... 详细信息

为提高飞机装配质量,便于装配过程的反馈调整,提出商用飞机复合超级壁板数字化测量技术研究。分析壁板的组成结构与结构特征,减少测量过程中对壁板造成损害,利用红光光束、分束镜等装置建立激光雷达扫描系统,通过点云数据配准,提高测量数据精度;构建Metra SCAN扫描仪的不确定度模型,确保测量数据更加真实;分析激光雷达的可达性,计算两种设备的重复测量区间,利用权重分配法获得最终测量数据,完成壁板数字化测量。实验结果表明,所提方法获取的点云数据较为完整,没有出现数据失真现象,测量误差小,促进了数字化测量技术的研究。

关键词：商用飞机复合超级壁板数字化测量激光雷达权重分配

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