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Impacts of Water-Sediment Regulation Scheme on Chromophoric Dissolved Organic Matter in the Lower Yellow River

Journal of Ocean University of China 2024年第2期23卷 455-466页

作者： liu xiao JIANG Xueyan liu Qian SUI Juanjuan ZOU Li Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education Ocean University of ChinaQingdao 266100China College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China School of Earth Sciences University of BristolBristolBS81RJUK North China Sea Environmental Monitoring Center State Oceanic AdministrationQingdao 266033China Key Laboratory of Ecological Prewarning Protection and Restoration of Bohai SeaMinistry of Natural ResourcesQingdao 266033China Key Laboratory of Marine Environment and Ecology of Ministry of Education Ocean University of ChinaQingdao 266100China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China

As a river with more than 3000 reservoirs in its watershed,the Yellow River has been affected by dams not only on the sediment load,but also on the water ***-sediment regulation scheme(WSRS),which has been carried out annually in the Yellow River since 2002,is a typical human activity affecting river water *** dissolved organic matter(CDOM)in river is susceptible to changes in ecological and environmental conditions as well as human ***,we report variations in dissolved organic carbon concentrations,compositions and sources of CDOM in time series samples in the lower Yellow River during *** addition,a parallel factor fluorescence analysis(PARAFAC)method is applied to identify different fluorescent components in water samples during WRSR,showing four major components including tryptophan-like component(C1),microbial humic-like component(C2),terrestrial humic-like component(C3)and tyrosine-like component(C4).In general,C1 increased after water regulation,while C2 and C3 increased after sediment regulation,indicating that the water and sediment released by the dam have different effects on CDOM *** the impacts of the dam,source of CDOM in the lower Yellow River is mainly autochthonous related to microbial activities,and is regulated by the terrestrial input during WSRS *** resuspension inhibits microbial activities and reduces the production of autochthonous ***,human activities especially WSRS,as exemplified here,significantly alter the quality and quantity of CDOM in the lower Yellow River,affecting CDOM dynamics and biogeochemical processes in the estuarine environment.

关键词： chromophoric dissolved organic matter(CDOM) water-sediment regulation scheme(WSRS) Yellow River optical properties

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Fractional order distance regularized level set method with bias correction

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The Journal of China Universities of Posts and Telecommunications 2024年第1期31卷 64-82页

作者： Cai Xiumei He Ningning Wu Chengmao liu xiao liu Hang School of Automation Xi'an University of Posts and TelecommunicationsXi'an 710121China School of Electronic Engineering Xi'an University of Posts and TelecommunicationsXi'an 710121China

The existing level set segmentation methods have drawbacks such as poor convergence,poor noise resistance,and long iteration *** this paper,a fractional order distance regularized level set segmentation method with bias correction is *** method firstly introduces fractional order distance regularized term to punish the deviation between the level set function(LSF)and the signed distance *** a series of covering template is constructed to calculate fractional derivative and its conjugate of image *** introducing the offset correction term and fully using the local clustering property of image intensity,the local clustering criterion of image intensity is defined and integrated with the neighborhood center to obtain the global criterion of image ***,the fractional distance regularization,offset correction,and external energy constraints are combined,and the energy optimization segmentation method for noisy image is established by level *** results show that the proposed method can accurately segment the image,and effectively improve the efficiency and robustness of exiting state of the art level set related algorithms.

关键词： image segmentation fractional order distance regularization level set function fractional derivative bias correction

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Rbm8a regulates neurogenesis and reduces Alzheimer's disease-associated pathology in the dentate gyrus of 5×FAD mice

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Neural Regeneration Research 2024年第4期19卷 863-871页

作者： Chenlu Zhu xiao Ren Chen liu Yawei liu Yonggang Wang Department of Neurology Lanzhou University Second Hospital Department of Neurology The First Affiliated Hospital of Nanchang University Department of Neurology Xiaogan City Central Hospital Health Service Department of the Guard Bureau of the General Office of the Central Committee of the Communist Party of China Headache Center Department of NeurologyBeijing Tiantan HospitalCapital Medical University

Alzheimer’s disease is a prevalent and debilitating neurodegenerative condition that profoundly affects a patient’s daily functioning with progressive cognitive decline,which can be partly attributed to impaired hippocampal *** in the hippocampal dentate gyrus is likely to persist throughout life but declines with aging,especially in Alzheimer’s *** evidence indicated that RNA-binding protein 8A(Rbm8a)promotes the proliferation of neural progenitor cells,with lower expression levels observed in Alzheimer’s disease patients compared with healthy *** study investigated the hypothesis that Rbm8a overexpression may enhance neurogenesis by promoting the proliferation of neural progenitor cells to improve memory impairment in Alzheimer’s ***,Rbm8a overexpression was induced in the dentate gyrus of 5×FAD mice to validate this *** Rbm8a levels in the dentate gyrus triggered neurogenesis and abated pathological phenotypes(such as plaque formation,gliosis reaction,and dystrophic neurites),leading to ameliorated memory performance in 5×FAD *** sequencing data further substantiated these findings,showing the enrichment of differentially expressed genes involved in biological processes including neurogenesis,cell proliferation,and amyloid protein *** conclusion,overexpressing Rbm8a in the dentate gyrus of 5×FAD mouse brains improved cognitive function by ameliorating amyloid-beta-associated pathological phenotypes and enhancing neurogenesis.

关键词： Adora2a Alzheimer’s disease astrocyte cAMP signaling pathway dentate gyrus dystrophic neurites microglia neurogenesis plaque Rbm8a

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Revolution in thermoelectric cooling using PbSe thermoelectrics by grid plainification

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Science China Materials 2024年第5期67卷 1672-1673页

作者： xiao-Lei Shi Qingfeng liu Zhi-Gang Chen School of Chemistry and Physics ARC Research Hub in Zero-emission Power Generation for Carbon Neutralityand Centre for Materials ScienceQueensland University of TechnologyBrisbaneQueensland4000Australia State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing211816China

Thermoelectric materials and devices enable direct conversion between heat and electricity,holding potential applications in thermoelectric power generation,localized cooling,and electronic thermal management[1].Howev... 详细信息

关键词： enable thermoelectric constrained

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Optical properties of an Er^(3+)-doped phosphate glass waveguide formed by single-energy H^+ ion implantation

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Optoelectronics Letters 2019年第2期15卷 104-107页

作者： CHEN Jing-yi YAN Sen ZHENG Rui-lin ZHANG Liao-lin GUO Hai-tao liu chun-xiao College of Electronic and Optical Engineering Nanjing University of Posts and Telecommunications School of Material Science and Engineering Jiangxi University of Science and Technology State Key Laboratory of Transient Optics and Photonics Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Sciences

In this work, we report the fabrication of an optical waveguide by single-energy H^+ ion implantation in the Er^(3+)-doped phosphate *** ion implantation conditions are with energy of 0.4 MeV and a fluence of 8.0×10^(16) ions/cm^*** dark mode spectrum of the waveguide structure was measured by the prism coupling *** refractive index change along with the penetration depth was fitted by using the reflectivity calculation method(RCM).Finally, the calculated near-field light intensity distribution shows superior waveguide properties, which demonstrates its promising potentials for compact optical integrated devices.

关键词： implantation properties waveguide

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Recent advances in vacancy engineering for reliable lithiumsulfur batteries

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Rare Metals 2024年第2期43卷 455-477页

作者： Wen-Dong liu xiao Tang Jun-An Feng Chao-Yue Zhang Hao liu Chuan Shi xiao-Xian Zhao Jian-Jun Song College of Physics School of Chemistry and Chemical EngineeringQingdao UniversityQingdao266071China Faculty of Science Centre for Clean Energy TechnologySchool of Mathematical and Physical SciencesUniversity of Technology SydneySydneyNSW2007Australia Department of Chemistry College of ScienceHebei Agricultural UniversityBaoding071001China

The high-energy-density and low-cost features endow lithium-sulfur batteries with broad application ***,many drawbacks,especially the detrimental shuttle effect,have hindered the further development of *** response,a lot of new structures have been applied to suppress the shuttle effect and promote the development of ***,vacancy engineering has gained the attention of researchers due to its unique electronic *** review aims to analyze the application of vacancy engineering in ***,the electrochemistry of LSBs has been systematically discussed and the existing challenges as well as improvement tactics of LSBs have also been ***,the preparation methods and characterization technologies of various vacancies are summarized,including oxygen vacancies,sulfur vacancies,selenium vacancies,other anion vacancies,cation vacancies,*** latest applications of vacancy engineering in LSBs are also summarized in this ***,some prospects and insights for further investigation and practical application of vacancy engineering in LSBs are put forward.

关键词： Lithium-sulfur batteries(LSBs) Defects Vacancy engineering Electronic structure Shuttle effect

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中国人口较少民族的政策实施与跨越式发展

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广西民族大学学报（哲学社会科学版） 2019年第6期41卷 153-160页

作者：刘晓春中国社会科学院民族学与人类学研究所

中华人民共和国成立七十年,人口较少民族地区的面貌发生了历史性转变。乡村基础设施和人民生活条件日益改善,增收渠道不断拓宽,社会事业协调并进,发展能力逐步增强,群众精神面貌焕然一新,民族关系更加和谐。人口较少民族不再囿于传统单... 详细信息

中华人民共和国成立七十年,人口较少民族地区的面貌发生了历史性转变。乡村基础设施和人民生活条件日益改善,增收渠道不断拓宽,社会事业协调并进,发展能力逐步增强,群众精神面貌焕然一新,民族关系更加和谐。人口较少民族不再囿于传统单一的生产方式,逐步转变为农业、养殖业、特色产业、旅游业等多业并举的发展格局,社会生产力实现了跨越式发展。人口较少民族生产生活的巨变,是新中国七十年伟大成就之见证,是中国特色民族发展道路的有益探索和成功实践。

关键词：人口较少民族政策实施跨越式发展民族团结进步

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The Trend of Smoking-Related Cognition and Its Association with Smoking Behaviors Among Junior High School Students—China,2013–2021

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China CDC weekly 2024年第22期6卷 503-508页

作者： Wenzhao liu Xinying Zeng Qi Su Lin xiao Shiwei liu Tobacco Control Office Chinese Center for Disease Control and PreventionBeijingChina

What is already known about this topic?In 2013,31.61%of students perceived quitting smoking as difficult,61.73%considered smoking less attractive,and 73.89%believed that secondhand smoke is definitely harmful to *** is added by this report?The percentage of students who perceived quitting smoking as difficult increased from 31.61%in 2013 to 38.83%in 2021,while the percentage of students who found smoking less attractive rose from 61.73%to 69.40%.Conversely,there was a decrease in the percentage of students who perceived secondhand smoke as harmful,from 73.89%to 68.46%.An increased awareness of the hazards of secondhand smoke was associated with a reduction in smoking *** are the implications for public health practice?It is imperative to enhance health education efforts that aim to raise awareness of the hazards of secondhand smoke.

关键词： smoke attractive Junior

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教育人类学典型案例的研究价值——以鄂伦春族为例

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贵州民族研究 2022年第5期43卷 116-121页

作者：刘晓春中国社会科学院民族学与人类学研究所北京100081

据2020年第七次全国人口普查统计,全国有鄂伦春族9168人。这与中国14亿人口的体量相比,规模相当小。但是,鄂伦春族的教育人类学意义和作为方法的研究价值却不能忽略。2010年,鄂伦春族大学以上文化程度人口638人,占民族总人口的17.6%;201... 详细信息

据2020年第七次全国人口普查统计,全国有鄂伦春族9168人。这与中国14亿人口的体量相比,规模相当小。但是,鄂伦春族的教育人类学意义和作为方法的研究价值却不能忽略。2010年,鄂伦春族大学以上文化程度人口638人,占民族总人口的17.6%;2010年,全国人均受教育年限为8.81年,而鄂伦春族人均受教育年限为10.57年。截至2022年3月,鄂伦春族获得博士学位的人口为8人,占民族总人口的0.087%,几近1‰。作为狩猎民族,鄂伦春族的社会变迁与文化发展具有典型性,梳理和归纳其教育发展轨迹,进行整体性的人类学分析,探讨鄂伦春族及其所处区域的教育发展模式与特点具有重要意义。我们也更需要通过鄂伦春这个案例研究来思考更为宏观和人类社会所共同面对的一些议题。鄂伦春族民族教育的繁荣发展,不仅是中国特色民族发展道路的有益探索和成功实践,而且也为世界人口较少民族的发展提供了范式和借鉴。

关键词：鄂伦春族民族教育教育人类学中国特色国际范式

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当代民族景观的“视觉性”生产——以黔东南旅游产业为例

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社会学评论 2021年第3期9卷 61-82页

作者：刘晓春中山大学中国非物质文化遗产研究中心中山大学中国语言文学系

改革开放40年来,中国的自然与社会、文化景观发生了巨大的变化,无数文化景观被营造出来。黔东南地区根据自身的自然与文化资源条件,基于差异化的原则,在以"游客凝视"为中心的旅游产业领域,以民俗文化为主体营造"民族景观",成为当地最美... 详细信息

改革开放40年来,中国的自然与社会、文化景观发生了巨大的变化,无数文化景观被营造出来。黔东南地区根据自身的自然与文化资源条件,基于差异化的原则,在以"游客凝视"为中心的旅游产业领域,以民俗文化为主体营造"民族景观",成为当地最美丽的风景。黔东南地区的"民族景观"是景观生产者运用"视觉性"生产机制,在文化空间再造以及文化场域体验中,在当地民众与游客之间塑造了一个"看/被看"的表演性社会舞台,文化持有者与游客互为表演主体。这种"民族景观"在满足"游客凝视"的欲望想象与伦理追求的同时,也建构、强化了自身的民族特性。

关键词：黔东南民族景观民族性视觉性游客凝视

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