检索结果-南通市图书馆

Urban flood risk assessment under rapid urbanization in Zhengzhou City,China

区域可持续发展(英文) 2023年第3期4卷 332-348页

作者： LI Guoyi liu jiahong SHAO Weiwei State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resource and Hydropower ResearchBeijing100038China Water Resources and Water Ecological Engineering Technology Research Center of Ministry of Water Resources Beijing100044China

With accelerated urbanization and climate change,urban flooding is becoming more and more serious.Flood risk assessment is an important task for flood management,so it is crucial to map the spatial and temporal distribution of flood risk.This paper proposed an urban flood risk assessment method that takes into account the influences of hazard,vulnerability,and exposure,by constructing a multi-index urban flood risk assessment framework based on Geographic Information System(GIS).To determine the weight values of urban flood risk index factors,we used the analytic hierarchy process(AHP).Also,we plotted the temporal and spatial distribution maps of flood risk in Zhengzhou City in 2000,2005,2010,2015,and 2020.The analysis results showed that,the proportion of very high and high flood risk zone in Zhengzhou City was 1.362%,5.270%,4.936%,12.151%,and 24.236%in 2000,2005,2010,2015,and 2020,respectively.It is observed that the area of high flood risk zones in Zhengzhou City showed a trend of increasing and expanding,of which Dengfeng City,Xinzheng City,Xinmi City,and Zhongmu County had the fastest growth rate and the most obvious increase.The flood risk of Zhengzhou City has been expanding with the development of urbanization.The method is adapted to Zhengzhou City and will have good adaptability in other research areas,and its risk assessment results can provide a scientific reference for urban flood management personnel.In the future,the accuracy of flood risk assessment can be further improved by promoting the accuracy of basic data and reasonably determining the weight values of index factors.The risk zoning map can better reflect the risk distribution and provide a scientific basis for early warning of flood prevention and drainage.

关键词： Urban flood Flood risk assessment Geographic Information System(GIS) Multi-index system method Urbanization Zhengzhou City

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Corrigendum to"SEMA4D acts as a novel oligogenic pathogenic gene of idiopathic hypogonadotropic hypogonadism through the PlexinB1/MET/RND1/RHOA/RAF1/MAPK signaling axis"[Genes&Diseases 10(2023)65-68]

引用

Genes & Diseases 2024年第4期11卷 428-429页

作者： Daoqi Wang Yonghua Niu jiahong Tan Jiaxin Wang Le Ling Yinwei Chen Jianan Gong Hao Xu Qing Ling Jianhe liu Jihong liu Department of Urology The Second Affiliated Hospital of Kunming Medical UniversityKunmingYunnan 650033China Department of Urology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430030China Department of Pediatric Surgery Tongji HospitalTongji Medical CollegeWuhanHubei 430030China Department of Obstetrics and Gynecology The First People's Hospital of Yunnan ProvinceKunmingYunnan 650034China Department of Urology First Affiliated Hospital of Harbin Medical UniversityHarbinHeilongjiang 150007China

The authors regret to correct the error in the order of the institute of the first author,which should go as the following.

关键词： Cor Diseases pogon

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Exploring impact of street layout on urban flood risk of people and vehicles under extreme rainfall based on numerical experiments

引用

中国科学:技术科学英文版 2023年第9期66卷 2561-2574页

作者： MEI Chao liu jiahong SHI HongYuan WANG Hao WANG Jia DONG LiRong SONG TianXu ZHANG HaiJia State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China Key Laboratory of River Basin Digital Twinning of Ministry of Water Resources(Preparation) Beijing 100038China Beijing Key Laboratory of Urban Water Cycle and Sponge City Technology Beijing Normal UniversityBeijing 100875China

Urban street layout is an important factor in the formation process, characteristics, and risk level of urban flooding;therefore, this study numerically investigates the impact of street layout on urban flood risk to people and vehicles. Four typical street-layout scenarios with areas of 3 km × 3 km are established based on a block-scale investigation. The layout types are regular grid,irregular grid, radial, and annular. Urban inundation models are then constructed for these typical street layouts based on the twodimensional(2D) hydrodynamic method. Two historic, extreme rainfall events, which occurred in Beijing on July 21, 2012 and in Zhengzhou on July 20, 2021, are used as rainstorm scenarios for urban inundation modelling. The flood risks to people and vehicles are then calculated. Results show that, for an extreme rainstorm on the block scale, the street layout impacts the spatial and temporal distributions of the inundation variables, which include the water depth, flow velocity, flood volume, and inundated area. Moreover, for the same extreme-rainfall scenario, the greatest differences in the total flood volume, maximum street-water depth, and maximum street-flow velocity caused by street-layout differences are 17.22%, 60.25%, and 61.50%, respectively.Among the four street layouts considered in this study, the annular street layout exhibits the lowest degrees of inundation and flood risk. For the same extreme-rainfall scenario, the proportions of high-risk road sections for adults and children in this layout are 58.89% and 62.28% smaller than those for the layout with the largest proportion of high-risk road sections, respectively;the proportions of high-risk road sections for the Honda Accord and Audi Q7 were 55.31% and 53.04% smaller, respectively. The findings of this study may aid scientific understanding and development of “flood-sensitive” block-scale street layouts and urban planning in the context of the changing environment.

关键词： urban inundation street layout urban form flood risk hydrodynamic simulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multifunctional catalytic sites regulation of atomic-scale iridium on orthorhombic-CoSe_(2)for high efficiency dual-functional alkaline hydrogen evolution and organic degradation

引用

Journal of Energy Chemistry 2024年第5期92卷 271-281页

作者： Jingjing Huang Chenglin Zhong Yanjie Xia Jia liu Guizhen Li Chao Yang jiahong Wang Qian Wang Zhenbao Zhang Feng Yan Jianghua Wu Yu Deng Zhenjiang Zhou Xingchen He Paul K.Chu Woon-Ming Lau Xue-Feng Yu College of Chemistry and Chemical Engineering Linyi UniversityLinyi 276005ShandongChina Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093JiangsuChina College of Biosystems Engineering and Food Science Zhejiang UniversityHangzhou 310058ZhejiangChina Department of Physics Department of Materials Science and EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina

The earth-abundant and high-performance catalysts are crucial for commercial implementation of hydrogen evolution reaction(HER).Herein,a multifunctional site strategy to construct excellent HER catalysts by incorporating iridium(Ir)ions on the atomic scale into orthorhombic-CoSe2(Ir-CoSe_(2))was reported.Outstanding hydrogen evolution activity in alkaline media such as a low overpotential of 48.7 mV at a current density of 10 mA cm^(-2)and better performance than commercial Pt/C catalysts at high current densities were found in the Ir-CoSe_(2) samples.In the experiments and theoretical calculations,it was revealed that Ir enabled CoSe_(2)to form multifunctional sites to synergistically catalyze alkaline HER by promoting the adsorption and dissociation of H_(2)O(Ir sites)and optimizing the binding energy for H^(*)on Co sites.It was noticeable that the electrolytic system comprising the Ir-CoSe_(2)electrode not only produced hydrogen efficiently via HER,but also degraded organic pollutants(Methylene blue).The cell voltage of the dual-function electrolytic system was 1.58 V at the benchmark current density of 50 mA cm^(-2),which was significantly lower than the conventional water splitting voltage.It was indicated that this method was a novel strategy for designing advanced HER electrocatalysts by constructing multifunctional catalytic sites for hydrogen production and organic degradation.

关键词： Orthorhombic-CoSe_(2) Multifunctional sites design Hydrogen evolution reaction Synergistically catalyze Methylene blue oxidation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

陕北靖边高铬地下水中硝酸根分布及来源

引用

地学前缘 2024年第1期31卷 384-399页

作者：郭华明尹嘉鸿严松刘超中国地质大学(北京)地下水循环与环境演化教育部重点实验室北京100083 中国地质大学(北京)水资源与环境学院北京100083

天然高铬地下水通常含有较高浓度的硝酸根,然而高铬地下水中硝酸根来源及其联系却并不清楚。本文以陕北黄土高原靖边西南地区的高铬地下水为研究对象,采集了不同深度的地下水和沉积物样品,并测试了地下水样品中的溶解Cr、主要阴阳离子、... 详细信息

天然高铬地下水通常含有较高浓度的硝酸根,然而高铬地下水中硝酸根来源及其联系却并不清楚。本文以陕北黄土高原靖边西南地区的高铬地下水为研究对象,采集了不同深度的地下水和沉积物样品,并测试了地下水样品中的溶解Cr、主要阴阳离子、δ^(18)O、δD、δ^(18)O-NO_(3)、δ^(15)N-NO_(3)等以及沉积物的主要组分和可溶性组分。研究结果表明,研究区地下水的水化学组分主要受水文地质条件的影响。第四系黄土潜水水化学类型主要为HCO_(3)-Na型和HCO_(3)-Ca-Mg型;白垩系环河组、洛河组砂岩承压水水化学类型复杂,主要为HCO_(3)-SO_(4)-Cl-Na-Mg型、HCO_(3)-SO_(4)-Na-Mg型、SO_(4)-Cl-Na-Mg型,地下水处于偏碱性、氧化的环境,具有较高的可溶盐含量。潜水的水化学组分主要来自含水层中硅酸盐风化;承压水水化学组分主要来源于蒸发盐的溶解。垂向上,承压水中硝酸根的平均浓度高于潜水和地表水;地下水硝酸根浓度超标率在研究区从东北到西南呈现高-低-高的趋势;沉积物中可溶性硝酸根与地下水样品在深度上具有相似的变化规律,表明地下水硝酸根主要来源于沉积物。δ^(18)O-NO_(3)和δ^(15)N-NO_(3)结果表明,硝化反应是研究区氮素循环转化的主要过程。在偏碱性氧化性地下水环境中,受溶解氧、硝酸根和硝化反应等多种因素的共同作用,铬趋于从岩石中氧化溶解,迁移进入地下水中。

关键词：地下水硝酸根六价铬水文地球化学氮氧同位素

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A new strategy for integrated urban water management in China：Sponge city

引用

Science China(Technological Sciences) 2018年第3期61卷 317-329页

作者： WANG Hao MEI Chao liu jiahong SHAO WeiWei China Institute of Water Resources and Hydropower Research State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin Beijing 100038 China School of Transportation and Civil Engineering & Architecture Foshan University Guangdong 528000 China Engineering and Technology Research Center for Water Resources and hydroecology of the Ministry of Water Resources Beijing 100044 China

Urban water-related problems associated with rapid urbanization, including waterlogging, water pollution, the ecological degradation of water, and water shortages, have caused global concerns in recent years. In 2013, in order to mitigate increasingly severe urban water-related problems, China set forth a new strategy for integrated urban water management(IUWM) called the "Sponge City". This is the first holistic IUWM strategy implemented in a developing country that is still undergoing rapid urbanization, and holds promise for application in other developing countries. This paper aims to comprehensively summarize the sponge city. First, this paper reviews prior studies and policies on urban water management in China as important background for the sponge city proposal. Then, the connotations, goals, and features of the sponge city are summarized and discussed.Finally, the challenges, research needs, and development directions pertinent to the sponge city are discussed based on investigations and studies conducted by the authors. The sponge city in China has a short history—given this, there are many issues that should be examined with regard to the stepwise implementation of the Sponge City Programme(SCP). Accordingly, the authors perceive this study as only the beginning of abundant studies on the sponge city.

关键词：城市建议水管理海绵中国城市计划都市化水相乡村

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于知识图谱的城市洪涝灾害链推演及时空特性解析

引用

水科学进展 2024年第2期35卷 185-196页

作者：王浩杜伟刘家宏王佳梅超中国水利水电科学研究院流域水循环模拟与调控国家重点实验室北京100038 水利部数字孪生流域重点实验室(筹) 北京100038 北京工业大学城市建设学部北京100124

城市洪涝灾害具有链式传播特性,解析城市洪涝灾害链的传递规律和时空演变特征对于阻断灾害链具有重要意义。本研究以郑州“7·20”特大暴雨洪涝灾害中地铁5号线被淹和京广快速路隧道被淹2个事件为案例,构建知识图谱揭示灾害链传递规律... 详细信息

城市洪涝灾害具有链式传播特性,解析城市洪涝灾害链的传递规律和时空演变特征对于阻断灾害链具有重要意义。本研究以郑州“7·20”特大暴雨洪涝灾害中地铁5号线被淹和京广快速路隧道被淹2个事件为案例,构建知识图谱揭示灾害链传递规律。通过复盘灾害链的演变过程,从中识别灾害链中的诱发点、引爆点、扩散点以及放大点,并着重分析致灾机理以及灾害链的时空特性,以灾害曲线形式直观展示不同灾害链的影响程度。郑州“7·20”洪涝灾害典型案例解析表明,两事件存在多个灾害链阻断时机,在救灾过程中应综合考虑灾前、灾中因素的影响,果断采取断链措施,并且要充分发挥应急措施的时效性,及时阻断引爆点和扩散点,降低洪涝灾害损失。该方法能够应用于链式灾害的复盘,指导分析具体事件的致灾机理和救灾切入点。

关键词：城市洪涝灾害链知识图谱灾害链传递灾害链推演时空特性

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Preparation and Application of Natural Bactericidal Deodorizer Bactericidal Deodorizer

引用

China Detergent & Cosmetics 2024年第2期9卷 38-42页

作者： Lin jiahong Tao Hongbing Xu Jian Deng Xiaofeng Gan Zhihao liu Yonglong Chen Mingjie Li Liangqiu Guangdong Dimei New Materials Technology Co. Ltd.China Guangdong Dimei Biological Technology Co. Ltd.China Institute of Microbiology Guangdong Academy of SciencesChina

Jasmine essential oil and lemon essential oil were selected for deodorizing ingredient.Lysine and silver ions were selected as auxiliary raw material.The product was prepared by emulsion dissolution technology.The minimum inhibitory concentration of various bacteria were during 100~2,000 mg/L.In the test,the germicidal efficiency of 2.0%(w/w)deodorant was 99%.The removal efficiency of trimethylamine and methanthiol were more than 95%by 3.0%(w/w).deodorant.The removal efficiency of ammonia and methanthiol were more than 92%by 3.0%(w/w)deodorant.In addition,The removal efficiency of isovaleric acid was 98%by 2.0%(w/w)deodorant.In analysis result,common pathogenic bacteria were effectively suppressed,kitchen and toilet odors were efficiently removed by natural plant deodorant.

关键词： plant extracts amino acid bactericide deodorizer

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

积分型非奇异终端滑模PMSM无传感器控制系统

引用

电机与控制学报 2024年第3期28卷 169-178页

作者：郑诗程刘志鹏赵卫王宇郎佳红安徽工业大学电气与信息工程学院安徽马鞍山243000

针对永磁同步电机中高速情况下传统的滑模观测器估算精度低且存在较强抖振的问题,提出一种基于改进型滑模观测器的PMSM矢量控制方法。基于非线性滑模面理论分析,构建一种积分型非奇异终端滑模面,有效降低了抖振现象,提高了系统的观测精... 详细信息

针对永磁同步电机中高速情况下传统的滑模观测器估算精度低且存在较强抖振的问题,提出一种基于改进型滑模观测器的PMSM矢量控制方法。基于非线性滑模面理论分析,构建一种积分型非奇异终端滑模面,有效降低了抖振现象,提高了系统的观测精确度;并设计了一种自适应反电动势滤波器,使反电动势能随观测器自适应调节,且谐波含量低,进一步提升动态精度;最后,利用正交锁相环原理调制出电机转子位置信息,将提出的新型控制方法应用到永磁同步电机调速系统,与传统滑模控制进行对比。仿真和实验表明,提出的基于新型滑模观测器的永磁同步电机控制系统跟踪精度高、鲁棒性强,动、静态响应好。

关键词：反电动势滤波器永磁同步电机无传感器控制滑模观测器调速系统

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Analysis of driving forces of water demand in Jing-Jin-Ji district in recent years based on water demand field theory

引用

Science China(Technological Sciences) 2020年第12期63卷 2593-2605页

作者： HUANG Ze liu jiahong MEI Chao WANG Hao SHAO WeiWei LI ZeJin College of New Energy and Environment Jilin UniversityChangchun 130021China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China School of Transportation and Civil Engineering&Architecture Foshan UniversityFoshan 528000China

In recent years,urbanization has accelerated and the gap between urban water supply and demand has become more significant.This phenomenon has led to greater demands on urban water resource management. Thus,analyses of the forces that drive urban water demand growth can help efficient management of urban water resources. "Jing-Jin-Ji" refers to the district composed of Beijing and Tianjin,municipality as well as Hebei Province,which is among the political and economic centers of China. The traditional analysis of driving force for water resources often consider cities as independent individuals and ignores the interaction between them. Such method cannot describe the spatial distribution of regional water demand. In this study,the water demand field theory is used to construct water demand and social development fields for the Jing-Jin-Ji district with relevant indicators. The distribution trends of the two fields,and the correlation of their intensities,are then analyzed. Principal component analysis is used to specifically determine the forces that drive water demand at different stages of development.Results indicate that the water demand field theory can accurately describe spatial variations in water demand intensity in the study area. The main driving force for water demand in the Jing-Jin-Ji district from 2000 to 2014 is the growth of urban population. However,in 2015 and 2016,"GDP of the tertiary industry" overtook it. The results of this study can serve as a basis for regional water demand forecasting,with large potential to be applied to urban water resource management.

关键词： water demand field degree of social development driving forces of water demand

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

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

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

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

请选择保存的检索档案：

请选择收藏分类：