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Urbanization reduces resource use efficiency of phytoplankton community by altering the environment and decreasing biodiversity

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Journal of Environmental Sciences 2022年第2期34卷 140-151页

作者： Yigang Yang Huihuang Chen Mamun Abdullah Al Jean Claude Ndayishimiye Jun R Yang Alain Isabwe anqi luo Jun Yang Aquatic EcoHealth Group Fujian Key Laboratory of Watershed EcologyKey Laboratory of Urban Environment and HealthInstitute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Engineering Research Center of Ecology and Agricultural Use of Wetland(Ministry of Education) College of AgricultureYangtze UniversityJingzhou 434025China

Urbanization often exerts multiple effects on aquatic and terrestrial organisms,including changes in biodiversity,species composition and ecosystem ***,the impacts of urbanization on river phytoplankton in subtropical urbanizing watersheds remain largely ***,we explored the effects of urbanization on phytoplankton community structure(i.e.,biomass,community composition and diversity)and function(i.e.,resource use efficiency)in a subtropical river at watershed scale in southeast China over 6 years.A total of 318 phytoplankton species belonging into 120 genera and 7 phyla were identified from 108 *** biomass showed an increasing trend with increasing urbanization *** phytoplankton community shifted from Chlorophyta dominance in rural upstream waters to Bacillariophyta dominance in urbanized downstream ***,phytoplankton diversity and resource use efficiency(RUE=phytoplankton biomass/total phosphorus)were significantly decreased with increasing urbanization level from upstream to *** RUE exhibited a significant positive correlation with species richness,but a negative correlation with phytoplankton *** variation in environmental factors(turbidity,total nitrogen,NH_(4)^(+)-N,total phosphorus,PO_(4)^(3-)-P and percentage urbanized area)was significantly correlated with phytoplankton diversity and ***,our results revealed the influence of urbanization on phytoplankton community structure and ecosystem function was due to its altering the environmental ***,human-driven urbanization may play crucial roles in shaping the structure and function of phytoplankton communities in subtropical rivers,and the mechanism of this process can provide important information for freshwater sustainable uses,watershed management and conservation.

关键词： Plankton Community functioning Subtropical river Urbanization gradient Land use Watershed ecology

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Urban water system theory and its model development and application

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Science China Earth Sciences 2024年第3期67卷 704-724页

作者： Jun XIA Yongyong ZHANG Dunxian SHE Shiyan ZHANG Jun YANG Mingquan LV Xiang ZHANG anqi luo Shengjun WU Yang LIU Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China State Key Laboratory of Water Resources&Hydropower Engineering Sciences Wuhan UniversityWuhan 430072China Aquatic Eco Health Group Key Laboratory of Urban Environment and HealthInstitute of Urban EnvironmentFujian Key Laboratory of Watershed EcologyChinese Academy of SciencesXiamen 361021China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China

The urban water system theory is an extension of the basin water system science on an urban scale, providing a new systematic solution for the unbalanced human-water relationship and severe water challenges, such as waterlogging, black and odorous water, and ecological degradation caused by urbanization. Most existing studies on urban water systems have focused on individual water cycle processes linked with water supply and sewage treatment plants, but mutual feedback between the water cycle and its associated material circulation and water ecology, as well as human processes, still needs further exploration. In this paper, the concept, theory, and technical methodology of the urban water system were developed based on the water cycle and basin water system science. The Urban Water System 5.0(UWS 5.0) model was developed by integrating the Time Variant Gain rainfall-runoff Model with Urban water system(TVGM_Urban) in different underlying surface conditions for analyzing the natural-social water cycle processes and their associated water environmental and ecological processes and the influence of multiscale sponge measures. Herein, five major simulation functions were realized: rainfall-runoff-nonpoint source pollutant load,water and pollutant transportations through the drainage network system, terminal regulation and purification, socioeconomic water cycle, and water system assessment and regulation. The location for the case study used in this paper was Wuhan City. The findings showed that the entire urban water system should consider the built-up area and its associated rivers and lakes as the research object and explore the integrations among the urban natural-social water cycle and river regulations inside and outside of the city as well as the effects of socioeconomic development and sponge measures on the water quantity-quality-ecology processes. The UWS 5.0 model efficiently simulated the urban rainfall-runoff process, total nitrogen(TN) and total phosphoru

关键词： Urban water system Human-water relationship Water issue Green development Theoretical basis Mathematical model

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主体依托适度超越——四川高考历史试题与教材相关性简析

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历史教学 2006年第10期 47-49页

作者：罗安琪宜宾市教科所四川宜宾644000

四川首次自主命制的高考“文科综合能力测试”面世后,广大历史教师及高考命题研究人员对其中的历史试题进行了热评,但是缺乏对它与高中历史教材相关度的系统分析研究,本文拟就此进行初步的探讨,权作引玉之砖。

关键词：四川高考教材相关性

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施廷镛先生对中国图书馆事业的贡献

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大学图书馆学报 2023年第5期41卷 101-107页

作者：罗安琪郑建明南京大学信息管理学院江苏南京210023

施廷镛先生是我国著名的图书馆学家、文献学家。先生以东南大学为始,先后辗转于故宫博物院、清华大学、燕京大学、中央大学、南京大学等院校,一生大部分时间都在高校图书馆工作。民国初期图书分类法百家争鸣、百花齐放的时代,他创编出... 详细信息

施廷镛先生是我国著名的图书馆学家、文献学家。先生以东南大学为始,先后辗转于故宫博物院、清华大学、燕京大学、中央大学、南京大学等院校,一生大部分时间都在高校图书馆工作。民国初期图书分类法百家争鸣、百花齐放的时代,他创编出著名的“八大类法”。从事图书馆工作的六十余年里,他编制资料目录,对丛书颇有研究,不遗余力地培养年轻新一代,以实践为我国图书馆事业和保护祖国遗产贡献自己的毕生精力,直至90岁逝世。他杰出的学术成就和人格操守,也留给后辈学人见贤思齐的追求与向往。

关键词：施廷镛图书分类法图书馆学史

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Tuning emission color of phosphor for white light-emitting diodes by tailoring Ce3+ and Eu2+ concentrations in Li2MSiO4(M =Ca,Sr,Ba) host utilized with combinatorial chemistry approach

Tuning emission color of phosphor for white light-emitting d...

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第七届全国稀土发光材料学术研讨会

作者： Lei Chen~* Yao Zhang anqi luo Yang Jiang~* (School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)

Recently,the photoluminescence of Ce or Eu activated LiSrSiO phosphor has attracted much more attentions for their potential application in white light-emitting diodes(LED).The mixture of the blue emission of Ce and the yellow-green emission of Eu both from LiSrSiO host is promising to produce white light directly without by adding other ***,the luminescence of Ceand Eu strongly depend on crystal field strength for the spin-allowed and parity-allowed f-d transition. Different luminescence may be tuned up by tailoring Ce and Eu concentrations in the multi-component host of LiMSiO(M= Ca,Sr,Ba).More importantly,the phosphor of a single-phase host activated by multi-activators that were used to produce white light,either matching for near ultraviolet or blue diode chips,could simplify the process of white LEDs manufacture *** properties of emission color, luminescence efficiency,color rendering index,and thermal stability of luminescence are crucial for phosphors to be used in ***,it is very difficulty to provide a dynamic prospect between luminescence properties and multi-compositions variation by using conventional one-by-one synthesis and characterization ***,only a limited number of samples are selected to study,as can found the published ***,combinatorial chemistry approach,which utilizes parallel synthesis and high-throughput screening strategies,is facile to accomplish these full factorial *** on these considerations,the photoluminescence of LiMSiO:Ce,Eu was studied with combinatorial chemistry approach for the application of *** following figure presents the composition map and 365 nm excited luminescence photograph of the combinatorial library which integrates 36 *** emission spectra of samples corresponding to the second row in combinatorial library are also presented.

关键词： Light-emitting diodes(LED) Phosphor Luminescence Combinatorial chemistry approach Li2MSiO4:Ce3+,Eu2+(M=Ca,Sr,Ba)

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Optimizing flux for improvement of luminescence of Sr3MgSi2O8:Eu2+ with the Taguchi method

Optimizing flux for improvement of luminescence of Sr3MgSi2O...

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第七届全国稀土发光材料学术研讨会

作者： Yao Zhang Lei Chen~* anqi luo Yang Jiang (School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)

Eu activated SrMgSiO host is a promising blue phosphor for application of white light-emitting diodes(LEDs) by combining with other red,green or yellow phosphors when excited with near ultraviolet from LED *** methods of synthesis and post-process techniques have been explored to improve the luminous efficiency of SrMgSiO:*** can efficiently low melt point and correspondingly promotes the crystallization during sintered at high temperature,thus enhances luminescence efficiency of *** Taguchi method,as forwarded by *** Taguchi,is a powerful mathematic tool for studying multiple factors,in which the effects of multiple factors are studied simultaneously by running tests with those factors at various levels and then optimizing parameters of products by reducing the variation of objective properties through statistical *** effect of the flux of NHCI,AIF,HBO,KBr,and NaCl on the luminescence of SrMgSiO:Eu was studied with the Taguchi method in this *** which,NHC1 has the maxima effect on the improvement of luminescence,as revealed in *** presence of new emission bands with peak at about 557 nm indicates that the crystal structure of Sr3MgSi208 has changed when adding 5%weight of KBr and NaCl as flux.

关键词： Light-emitting diodes(LED) Phosphor Luminescence Flux Sr3MgSi2O8:Eu2+

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VUV/UV excited photoluminescence properties of YBO3:Sb3+,Eu3+ phosphor

VUV/UV excited photoluminescence properties of YBO3:Sb3+,Eu3...

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第七届全国稀土发光材料学术研讨会

作者： anqi luo,Lei Chen,Yao Zhang,Yang Jiang (School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)

The phosphors of YBO co-activated with Sb and Eu were synthesized with solid state reaction method,and their vacuum ultraviolet(VUV) and ultraviolet(UV) excited photoluminescence DroDertied were studied with svnchrotron radiation instrument combined with *** emission SDectrum of YBO3:*** consisting of a broad emission band with peak at about 455 nm and several emission lines was observed bv excitins Sb with 270 nm(S0→Pl transition),as displaved in Figure 1. The broad emission band peaked at about 455 nm was attributed to P1→S0 transition of *** the emission lines in the reaion of 570-700 nm was attributed to D0→FJ(J=0.***.2.4) transition of Eu. The absorption band of Sb was observed bv monitoring the strongest emission of Eu at 592 *** energy transfer from Sb to Eu was demonstrated,and the effect of Sb and Eu concentrations on luminescence efficiency and emission color were analvzed.

关键词： Phosphor Luminescence Acuum ultraviolet(VUV) YBO3:Sb3+,Eu3+

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面对高三:我们该做些什么?——高三工作课堂内外的实践与反思

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教育科学论坛 2006年第10期 43-45页

作者：罗安琪四川省宜宾市教育科学研究所 644000

高考恢复了三十年,我们奋斗了三十年.面对高三工作,大家摸索了不少好的方法,积累了比较丰富的经验,但当人们跨进校门、走上讲台的时候,还是免不了要问:面对高三,我们该做些什么?

关键词：高三实践课堂高考讲台

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2023年国内外文化遗产数字化研究述评

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图书馆论坛 2024年第10期44卷 72-82页

作者：罗安琪刘佳静郑建明南京大学信息管理学院

文章厘清“文化遗产数字化”概念,挖掘与梳理2023年国内外相关主题研究文献,提炼出该领域四大热门主题:文化遗产数字化存储与处理、文化遗产数字化传承与保护、文化遗产数字化展示与传播、文化遗产数字化服务与发展。归纳研究特征:研究... 详细信息

文章厘清“文化遗产数字化”概念,挖掘与梳理2023年国内外相关主题研究文献,提炼出该领域四大热门主题:文化遗产数字化存储与处理、文化遗产数字化传承与保护、文化遗产数字化展示与传播、文化遗产数字化服务与发展。归纳研究特征:研究方法多样,推动学科交叉融合发展;研究对象复杂,综合运用多种技术手段;研究主题集中,深度与广度不断拓展。探讨研究不足:未形成全局观、系统化的研究成果,对文化内涵与价值的关注不足,缺乏对用户特征和需求主体的深入分析。展望研究方向:统筹推进文化遗产保护与发展、推动文化与科技深度融合、构建多元化服务供给体系,为进一步研究提供借鉴。

关键词：文化遗产数字化数字遗产

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乡村振兴视野下民族文化遗产资源再生产研究——以云南省双柏县三笙文创产品设计为例

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艺术管理（中英文） 2021年第4期 51-59页

作者：戴羽晗罗安琪云南艺术学院民族艺术研究院云南昆明650500

中国特色社会主义进入新时代,在现代化视域之下,乡村发展不充分等问题日益突出。乡村振兴无论是从国家层面还是从人类学学科性质的角度,都被提升到前所未有的高度。三笙文化作为民族文化的重要组成部分,具备一定的转化为民族文化遗产的... 详细信息

中国特色社会主义进入新时代,在现代化视域之下,乡村发展不充分等问题日益突出。乡村振兴无论是从国家层面还是从人类学学科性质的角度,都被提升到前所未有的高度。三笙文化作为民族文化的重要组成部分,具备一定的转化为民族文化遗产的资源优势,呈现多样化的样态。本文以云南省双柏县三笙文创产品设计为例,通过田野调查的实物分析,进行个案研究,为乡村振兴下民族文化遗产资源的再生产提供借鉴和参考。

关键词：乡村振兴文化资源文创产品三笙文化

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