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Waterlogging risk assessment based on self-organizing map(SOM)artificial neural networks:a case study of an urban storm in beijing

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Journal of Mountain Science 2017年第5期14卷 898-905页

作者： LAI Wen-li wang hong-rui wang Cheng ZHANG Jie ZHAO Yong College of Water sciences Beijing Normal University Beijing 100875 China beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology Beijing 100875 China environmental Science Division Argonne National Laboratory Lemont IL 60439 USA State Key Laboratory of Simulation and Regulation of Water Cycle in Riuer Basin China Institute of Water Resources and Hydropower Research Beijing 100038 China

Due to rapid urbanization, waterlogging induced by torrential rainfall has become a global concern and a potential risk affecting urban habitant's safety. Widespread waterlogging disasters haveoccurred almost annuallyinthe urban area of beijing, the capital of china. Based on a selforganizing map(SOM) artificial neural network(ANN), a graded waterlogging risk assessment was conducted on 56 low-lying points in beijing, china. Social risk factors, such as Gross domestic product(GDP), population density, and traffic congestion, were utilized as input datasets in this study. The results indicate that SOM-ANNis suitable for automatically and quantitatively assessing risks associated with waterlogging. The greatest advantage of SOM-ANN in the assessment of waterlogging risk is that a priori knowledge about classification categories and assessment indicator weights is not needed. As a result, SOM-ANN can effectively overcome interference from subjective factors,producing classification results that are more objective and accurate. In this paper, the risk level of waterlogging in beijing was divided into five grades. The points that were assigned risk grades of IV or Vwere located mainly in the districts of Chaoyang, Haidian, Xicheng, and Dongcheng.

关键词： Waterlogging risk assessment Self-organizing map(SOM) neural network Urban storm

Spatial patterns of interprovincial mountain geographical names in china and implications for regional governance

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Journal of Mountain Science 2018年第11期15卷 2517-2530页

作者： ZHANG Sheng-rui wang Ying-jie JU hong-run ZHANG Tong-yan LI Dai-chao FANG Lei wang Ying-ying institute of Geographic sciences and Natural Resources research Chinese Academy of Sciences Beijing 100101 China university of Chinese Academy of sciences Beijing 100049 China State Key Laboratory of Resources and environmental Information Systems Institute of Geographic and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China School of Tourism and Geography Science Qingdao University Oingdao 266071 China

Suffering from fragile environment, poor accessibility and infrastructure, as well as social,political and economic marginality, the interprovincial mountain geographical entities are difficult areas for the regional governance in *** analyzing the spatial patterns and the influencing factors of the interprovincial mountain geographical names(IMGNs), the goal of this research is to clarify the geographical features of IMGNs and offer alternatives for the management of interprovincial mountain regions in china. The spatial visualization,the analysis of spatial agglomeration and the influencing factors of IMGNs were all implemented under a geographical information system. Results showed that there were 6869 IMGNs in china according to the database of "china's Second National Survey of Geographical Names(2014-2018)",including 4209 mountain geographical names, 1684 mountain peak geographical names and 976 the other mountain geographical names. Hunan Province had the largest number of names while Shanghai had the smallest number of names. In addition, the spatial variance of the mountain peak names and the mountain names were larger than that of the other mountain geographical names, and the IMGNs showed a significant clustering phenomenon in the southern part of china. The relative elevation and the population had an impact on the distribution of the IMGNs. The largest number of the names occurred where the relative elevation was between 1000-2000 m and where the population was between 40-50 million. Density of unnamed interprovincial mountain geographical entities declined from west to east in china. The analysis of generic names of different types of IMGNs implied that the naming of IMGNs is inconsistent. Based on these analyses, it is suggested that the government should take the IMGNs as management units, strengthen the naming of unnamed interprovincial mountain geographical entities, standardize the generic names of IMGNs and identify areas of poverty based on

关键词： Interprovincial mountain geographical names Spatial association Spatial variance GIS Regional governance china

黑土区不同耕作措施对土壤水分和玉米产量的影响

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植物营养与肥料学报 2024年第8期30卷 1447-1460页

作者：文雪温艳茹刘宝周统高睿璐刘艳辉尧水红北方干旱半干旱耕地高效利用全国重点实验室/中国农业科学院农业资源与农业区划研究所北京100081 云南省高原地理过程与环境变化重点实验室/云南师范大学地理学部云南昆明650050 中国农业科学院农田灌溉研究所河南新乡453003 黑龙江省水利科学研究院齐齐哈尔试验站黑龙江齐齐哈尔161006

【目的】研究东北黑土区不同保护性耕作措施对土壤养分、玉米产量及水分利用的影响,为该区旱作农田耕作技术应用提供理论支持。【方法】于2019年在黑龙江省齐齐哈尔进行田间试验,设置4个耕作措施处理:1)秋季清理玉米秸秆并旋耕整地玉米... 详细信息

【目的】研究东北黑土区不同保护性耕作措施对土壤养分、玉米产量及水分利用的影响,为该区旱作农田耕作技术应用提供理论支持。【方法】于2019年在黑龙江省齐齐哈尔进行田间试验,设置4个耕作措施处理:1)秋季清理玉米秸秆并旋耕整地玉米连作(传统耕作);2)玉米饲草间作,饲草盛期刈割覆盖,秋天深翻还田(粮草间作);3)玉米单作,秸秆覆盖还田免耕(覆盖免耕);4)休耕3年后旋耕整地,次年播种玉米并传统方法整地(休耕再耕作)。3年后(2022年)于播种前取样,分析0—20 cm土层土壤养分含量和0—100 cm土层土壤容重。在玉米出苗前、苗期、抽雄期和成熟期,每20 cm为1层,分析0—100 cm土层土壤水分含量,调查玉米产量和水分利用效率。【结果】与传统耕作比,粮草间作、覆盖免耕和休耕再耕作3个耕作处理0—20 cm土壤容重显著降低,以休耕再耕作容重最低;苗前0—20 cm土层土壤储水量分别显著增加了6.36%、13.17%和23.09%,粮草间作与休耕再耕作20—100 cm土层土壤储水量显著低于传统耕作。粮草间作、覆盖免耕和休耕再耕作3个耕作处理玉米田间耗水量较传统耕作分别减少14.18%、9.26%和10.96%,水分利用效率分别提高48.51%、26.22%和42.46%,土壤有机碳含量分别增加2.24%、11.52%和15.68%。与传统耕作方式相比,粮草间作、覆盖免耕和休耕再耕作对玉米穗行数无显著影响,但显著提高玉米行粒数,因此产量分别提高27.46%、14.54%和26.87%。【结论】保护性耕作可有效提高土壤有机碳含量,增加土壤水分,减少玉米田间耗水量,显著提高玉米产量14%~28%和水分利用效率26%~49%。因此,在东北黑土区旱作农田推广保护性耕作是一种增产、节水的有效途径。

关键词：保护性耕作储水量玉米耗水水分利用效率作物产量

埃他卡林对间歇性低氧暴露肺微动脉的选择性扩张作用

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中国应用生理学杂志 2013年第4期29卷 333-336页

作者：黄景慧韩文志张雁芳段瑞峰邓浩浩郭玉红刘卫汪海军事医学科学院卫生学环境医学研究所心血管药物研究中心北京100850 北京赛德维康医药研究院北京100039

目的：研究新型ATP敏感性钾通道开放剂埃他卡林（Ipt）对间歇性低氧暴露肺微动脉扩张作用特征。方法：将雄性SD大鼠随机分为3组,对照组（Control）,低氧暴露组,置于常压低氧舱内（O210%±0.5%）8 h/d,每周6d,和低氧暴露＋醋氮酰胺（Acz... 详细信息

目的：研究新型ATP敏感性钾通道开放剂埃他卡林（Ipt）对间歇性低氧暴露肺微动脉扩张作用特征。方法：将雄性SD大鼠随机分为3组,对照组（Control）,低氧暴露组,置于常压低氧舱内（O210%±0.5%）8 h/d,每周6d,和低氧暴露＋醋氮酰胺（Acz）干预组（灌胃给予Acz 80 mg/（kg.d））。12周后分离大鼠管径为（197±4）μm的肺微动脉组织,利用DMT微血管张力测定仪在6 nmol/L内皮素-1（ET-1）致血管预收缩条件下,考察不同浓度Ipt对间歇性低氧暴露肺微动脉张力变化并利用ACh考察肺微动脉内皮活性。结果：与常压常氧组对比,10-5mol/LACh对间歇性低氧暴露肺微动脉舒张率显著降低（P〈0.01）,而与80 mg/kg Acz干预组肺微动脉舒张率无显著性差异（P〉0.05）;Ipt在（10-11~10-4）mol/L对间歇性低氧暴露肺微动脉呈剂量依赖性舒张作用,与80 mg/kg Acz干预组间无显著性差异（P〉0.05）,而对常压常氧组肺微动脉无明显的舒张作用。结论：间歇性低氧暴露肺微动脉内皮细胞功能受损,Ipt可选择性扩张低氧暴露肺微动脉;Acz可改善低氧所致内皮细胞功能异常,但并不影响Ipt对低氧暴露肺微动脉的选择性扩张作用。

关键词：埃他卡林低氧肺动脉高压肺微动脉微血管内皮

Evaluating modified effects of family factors on intervention to protect primary school students from the impact of heatwave

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Advances in Climate Change research 2023年第6期14卷 866-872页

作者： rui ZHANG Bo SUN Si-Yuan WU Shui-Ling QU yan wang Yu-Jie MENG Song-wang wang Xiao-Yuan YAO Shilu TONG Yong-hong LI Yi-Bin CHENG Chinese Center for Disease Control and Prevention Bejing 102206China National institute of environmental Health Chinese Center for Disease Control and PreventionBeijing 100021China china CDC Key Laboratory of Environment and Population Health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijing 100021China Sprott School of Businss Carleton UniversityOttawa Ontario KIS 5B6Canada School of Public Health and Social Work Queensland University of Technology BrisbaneBrisbane 4006Australia

Identifying the factors that may impact intervention effectiveness of primary students is crucial for developing targeted intervention strategies on heatwave *** purpose of the study was to assess how the family factors could affect the intervention effects of primary school students to adapt heatwave,using the data from a previously conducted primary school-based intervention *** study recruited 648 students(9-13 years old)and their parents from two primary schools in Dongtai of Jiangsu province,*** May to September 2017,a 5-mon intervention for enhancing knowledge,attitude and practice(KAP)was implemented at the intervention *** students'KAP scores and the family-related information were measured by designed self-administered questionnaires at intervention school and control school separately before and after *** effects of the intervention were explored through the propensity score matching and difference-in-difference method(PSM-DID),and stratifed analysis were conducted by family *** overall KAP score increased by 2.391(95%CI:1.881,2.902)after intervention,which shows that the intervention was *** students whose parents with higher school educational attainment,parents with employment,and household number≤3 achieved significantly higher increment of KAP scores than their *** students whose parents in marriage achieved higher score increasing than parents not in marriage,the difference was *** findings indicated that parental education status,working status and the household size were the influence factors of heatwave adaption interventions for primary school *** interventions should take parental education status,working status and household size into account to improve the effectiveness of heatwave adaption intervention for primary school students.

关键词： Heatwave Intervention Family factors Primary students Parents

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种子休眠与萌发调控的研究进展

作物学报 2024年第1期50卷 1-15页

作者：宋松泉唐翠芳雷华平姜孝成王伟青程红焱中国科学院植物研究所北京100093 湖南师范大学生命科学学院湖南长沙410081 湘南学院南岭现代种业研究院湖南郴州423099

休眠使植物种子能够为萌发安排时间,直到环境条件变得有利于幼苗的存活与生长。种子的休眠特性具有重要的生态适应性意义和显著的农业价值。植物激素脱落酸(ABA)和赤霉素(GA)是种子休眠与萌发的关键因素,处于休眠状态的成熟种子含有高... 详细信息

休眠使植物种子能够为萌发安排时间,直到环境条件变得有利于幼苗的存活与生长。种子的休眠特性具有重要的生态适应性意义和显著的农业价值。植物激素脱落酸(ABA)和赤霉素(GA)是种子休眠与萌发的关键因素,处于休眠状态的成熟种子含有高水平的ABA和低水平的GA;ABA诱导和维持种子休眠,而GA拮抗ABA的作用和促进种子萌发。萌发延迟-1 (DOG1)是种子休眠的主要调控因子,与ABA协同作用延迟萌发。DOG1通过与PP2C ABA过敏感萌发(AHG1/AHG3)结合以增强ABA的信号转导,以及抑制AHG1的作用以增加ABA的敏感性和强加种子休眠。印记基因在受精前后受到表观遗传机制的调控,与种子休眠的建立与释放密切相关。近年来,种子休眠的调控研究取得了显著的进展。本文综述了植物激素ABA和GA对种子休眠与萌发的控制, DOG1调控种子休眠的作用机制,以及种子休眠与萌发的表观遗传调控,并提出了在本领域需要进一步研究的科学问题,以期为深入理解种子休眠与萌发的分子机制、抗穗萌发育种以及促进休眠种子的萌发提供参考。

关键词： DOG1 表观遗传分子机制植物激素种子休眠

CEPC Technical Design Report

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Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai Yu Bai yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai Wenyong Cai Wujun Cai Yijian Cai Yizhou Cai Yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi Junsong Cang Guofu Cao Jianshe Cao Antoine Chance Xuejun Chang Yue Chang Zhe Chang Xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che Yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen Guoming Chen Hua-Xing Chen Huirun Chen Jinhui Chen Ji-Yuan Chen Kai Chen Mali Chen Mingjun Chen Mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen Shiqiang Chen Tianlu Chen Wei Chen Xiang Chen Xiaoyu Chen Xin Chen Xun Chen Xurong Chen Ye Chen Ying Chen Yukai Chen Zelin Chen Zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng Huajie Cheng Shan Cheng Tongguang Cheng Yunlong Chi Pietro Chimenti Wen Han Chiu Guk Cho Ming-Chung Chu Xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui Xiaohao Cui Zhaoyuan Cui Brunella D'Anzi Ling-Yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng Wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong Jianin AGH university of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui university HefeiAnhui Applied Physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu university Institute of ScienceVaranasi Bandirma Onyedi Eylul university Bandirma Beihang university Beijing beijing Computational Science research Center Beijing beijing Conveyi LTD Beijing beijing Glass research institute Co. LtdBeijing beijing institute of Technology Beijing beijing normal university Beijing Brown university ProvidenceRI Budker institute of Nuclear Physics Novosibirsk Cadi Ayyad university Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo university Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central china normal university WuhanHubei Central South university ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan china academy of engineering physics MianyangSichuan china building materials academy Beijing china Center of Advanced Science and Technology Beijing china institute of Atomic Energy Beijing china Jiliang university HangzhouZhejiang china Nuclear Instrument CO. LTDBeijing china university of Geosciences Beijing china university of Geosciences WuhanHubei china university of Mining and Technology XuzhouJiangsu china West normal university NanchongSichuan Chongqing university Department of PhysicsChongqing Chulalongkorn university Bangkok City university of hong Kong Department of PhysicsHong Kong Cockcroft institute Daresbury Cornell university IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu university DalianLiaoning Dalian university of Technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint institute for Nuclear research(DLNP JINR) Dubna East china university Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by china,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise

Quantifying in situ N2 fluxes from an intensively managed calcareous soil using the 15N gas-flux method

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Journal of Integrative Agriculture 2022年第9期21卷 2750-2766页

作者： LIU yan wang rui PAN Zhan-lei ZHENG Xun-hua WEI Huan-huan ZHANG hong-rui MEI Bao-ling QUAN Zhi FANG Yun-ting JU Xiao-tang State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of Sciences(CAS)Beijing 100029P.R.China College of Earth and Planet Science University of Chinese Academy of SciencesBeijing 100049P.R.China College of Resources and environmental sciences China Agricultural UniversityBeijing 100193P.R.China School of Ecology and Environment Inner Mongolia UniversityHohhot 010021P.R.China CAS Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110164P.R.China College of Tropical Crops Hainan UniversityHaikou 570228P.R.China

Denitrification-induced nitrogen(N) losses from croplands may be greatly increased by intensive ***,the accurate quantification of these losses is still challenging due to insufficient available in situ measurements of soil dinitrogen(N) *** carried out two one-week experiments in a maize-wheat cropping system with calcareous soil using theN gas-flux(NGF) method to measure in situ Nfluxes following urea *** ofN-labeled urea(99 atom%,130-150 kg N ha) were followed by irrigation on the 1 st,3 rd,and 5 th days after fertilization(DAF 1,3,and 5,respectively).The detection limits of the soil Nfluxes were 163-1 565,81-485,and 54-281 μg N mhfor the two-,four-,and six-hour static chamber enclosures,*** Nfluxes measured in 120 cases varied between 159 and 2 943(811 on average) μg N *** were higher than the detection limits,with the exception of only two *** Nfluxes at DAF 3 were significantly higher(by nearly 80%(P<0.01)) than those at DAF 1 and 5 in the maize experiment,while there were no significant differences among the irrigation times in the wheat *** Nfluxes and the ratios of nitrous oxide(NO) to the NO plus Nfluxes following urea application to maize were approximately 65% and 11 times larger,respectively(P<0.01),than those following urea application to *** differences could be mainly attributed to the higher soil water contents,temperatures,and availability of soil N substrates in the maize experiment than in the wheat *** study suggests that theNGF method is sensitive enough to measure in situ Nfluxes from intensively fertilized croplands with calcareous soils.

关键词： N2 fluxes 15N gas-flux method N2O/(N2O+N2)ratios detection limit intensive cropping system

Ceratopteris chunii and Ceratopteris chingii(Pteridaceae),two new diploid species from china,based on morphological,cytological,and molecular data

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Plant Diversity 2022年第3期44卷 300-307页

作者： Jun-Hao Yu rui Zhang Qiao-Ling Liu Fa-Guo wang Xun-Lin Yu Xi-Ling Dai Yong-Bo Liu Yue-hong yan Eastern china Conservation Centre for Wild Endangered Plant Resources Shanghai Chenshan Botanical GardenShanghai 201602China College of Life Science Shanghai Normal UniversityShanghai200234China Shenzhen Key Laboratory for Orchid Conservation and Utilization National Orchid Conservation Center of China and the Orchid Conservation&Research Center of ShenzhenShenzhen518114China Guangdong Provincial Key Laboratory of Applied Botany South China Botanical GardenChinese Academy of SciencesGuangzhou510650China College of Forestry Central South University of Forestry&TechnologyChangshaHunan410004China State environmental protection Key Laboratory of Regional Eco-process and Function Assessment Chinese Research Academy of Environmental SciencesBeijing100012China

Understanding how natural hybridization and polyploidizations originate in plants requires identifying potential diploid ***,cryptic plant species are widespread,particularly in Ceratopteris(Pteridaceae).Identifying Ceratopteris cryptic species with different polyploidy levels is a challenge because Ceratopteris *** high degrees of phenotypic ***,two new cryptic species of Ceratopteris,Ceratopteris chunii and Ceratopteris chingii,are described and *** analyses reveal that each of the new species form a well-supported *** and *** are similar to Ceratopteris gaudichaudii *** and ***,respectively,but distinct from their relatives in the stipe,basal pinna of the sterile leaf or subelliptic shape of the fertile leaf,as well as the spore *** addition,chromosome studies indicate that *** and *** are both *** findings will help us further understand the origin of Ceratopteris polyploids in Asia.

关键词： Ceratopteris Phylogeny Chromosome Taxonomy Cryptic species