检索结果-南通市图书馆

Urban water system theory and its model development and application

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 phosphorus(TP) concentrations in water bodies, and charac

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

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

Small water bodies in China:Spatial distribution and influencing factors

引用

Science China Earth Sciences 2022年第8期65卷 1431-1448页

作者： Mingquan LV shengjun wu Maohua MA Ping HUANG Zhaofei WEN Jilong CHEN Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 401122China

Inland water bodies,including ponds,lakes,reservoirs,and rivers,provide extensive ecosystem services for human beings.Among these,small water bodies(SWBs),such as ponds and small reservoirs,are more common landscape features and important biogeochemical reactors.SWBs can significantly influence biogeochemical processes and hydrologic cycles.However,due to their small size,SWBs(0.1 ha)cover approximately 179300 km^(2),which is approximately 1.8%of the land area in China.In addition,the combined shoreline length of the water bodies was approximately 2157400 km.Of these water bodies,96.85%were SWBs,accounting for 17.85%of the total water area and 76.4% of the total shoreline length.Precipitation,terrain,and human activity cumulatively explained 45% of the variance in SWB distribution,with precipitation being the strongest climatic explanatory factor.Our results provide important data for determining the roles of SWBs in biogeochemical cycles,habitat protection,and hydrological cycles.

关键词： Small water body Pond Small reservoir China Spatial distribution

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

Regulation characteristics of underlying surface on runoff regime metrics and their spatial differences in typical urban communities across China

引用

Science China Earth Sciences 2022年第8期65卷 1415-1430页

作者： Yongyong ZHANG Jinjin HOU Jun XIA Dunxian SHE shengjun wu Xingyao PAN Institute of Geographic Sciences and Natural Resources Research Key Laboratory of Water Cycle and Related Land Surface ProcessesChinese Academy of SciencesBeijing 100101China Changjiang Investigation PlanningDesign and Research Co.Ltd.Wuhan 430014China State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan 430072China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400417China Beijing Key Laboratory of Urban Water Cycle and Sponge City Technology Beijing 100048China

The regulation and spatial differences of urban runoffs are of great concern in contemporary hydrological research.However,owing to a shortage of basic data sources and restrictions on urban hydrological simulation functions,simulating and investigating the regulation mechanism behind rainfall-runoff processes remain significantly challenging.In this study,the Time Variant Gain Model(TVGM),a hydrological nonlinear system model,was extrapolated to the hydrodynamic model of an urban drainage network system by integrating it with the widely used Stormwater Management Model(SWMM)to adequately simulate urban runoff events while considering various underlying surfaces and runoff routing modes,such as surface,drainage network and river runoff,in urban regions(i.e.,TVGM-SWMM).Moreover,runoff events were characterized using the following four runoff regime metrics:runoff coefficient,capture ratio of annual runoff volume,standardized flood timescale,and the ratio of occurrence time differences between flow and rainfall peak to event duration(peak flow delay time).The characteristics and spatial differences of urban runoff regulations were investigated,and the key impact factors and their relative contributions were identified using multivariate statistical analyses.Four communities were selected as our study areas,consisting of communities from Beijing,Shenzhen,wuhan,and Chongqing.Our results showed that the TVGM-SWMM performed considerably better than SWMM alone.The comprehensive simulation accuracy of 60%of the events(12/20)improved by 4-86%,with the bias improving the most,followed by the efficiency coefficient.Barring the runoff coefficient,significant spatial differences were identified at the patch scale for the runoff regime metrics,with differences of 0.43,0.22,and 0.16(p<0.05).The key impact factors were the pipe length(r=0.51)in the drainage network system and the forest area ratios(r=0.56),sponge measures(r=0.52),grassland(r=0.48),and impervious surface(r=0.46)in the underlying surfaces.The contributions of the

关键词： Runoff event Regime metrics Spatial differences Urban rainfall-runoff model Underlying surface regulation

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

Illegal Radio Station Localization with UAV-Based Q-Learning

引用

China Communications 2018年第12期15卷 122-131页

作者： shengjun wu College of electronic and information engineering Nanjing University of Aeronautics and Astronautics

This paper proposes a novel unmanned aerial vehicle(UAV)-based illegal radio station(IRS) localization scheme, where the transmit power of the IRS, the channel model and the noise model are unknown to the UAV. A direction-aware Q-learning algorithm is developed to process received signal strength(RSS) values collected by a directional antenna, as well as directions corresponding to the RSS values. This algorithm determines the direction the UAV flies towards and thereby finds the IRS. The proposed scheme is compared to two baseline schemes. One baseline locates the IRS by a UAV equipped with an omnidirectional antenna, where conventional Q-learning is exploited to process the measured RSS and determine the UAV's trajectory. The other baseline locates the IRS by a directional-antenna UAV, where the UAV flies towards the direction with respect to the maximum RSS value. Numerical results show that, especially for a low receive SNR, the proposed scheme can outperform the two baselines in terms of the localization efficiency, providing a smoother trajectory for the UAV.

关键词： unmanned aerial vehicle Q-learning directional antenna illegal radio station

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

Uncertainty modeling of wind power frequency regulation potential considering distributed characteristics of forecast errors

引用

Protection and Control of Modern Power Systems 2021年第1期6卷 276-288页

作者： Cheng Yan Yi Tang Jianfeng Dai Chenggen Wang shengjun wu School of Electrical Engineering Southeast UniversityNanjingChina College of Automation Nanjing University of Posts and TelecommunicationsNanjingChina State Grid Jiangsu Electric Power Co. Ltd.Electric Power Research InstituteNanjingChina

Large-scale integration of wind power generation decreases the equivalent inertia of a power system, and thus makes frequency stability control challenging. However, given the irregular, nonlinear, and non-stationary characteristics of wind power, significant challenges arise in making wind power generation participate in system frequency regulation. Hence, it is important to explore wind power frequency regulation potential and its uncertainty. This paper proposes an innovative uncertainty modeling method based on mixed skew generalized error distribution for wind power frequency regulation potential. The mapping relationship between wind speed and the associated frequency regulation potential is established, and key parameters of the wind turbine model are identified to predict the wind power frequency regulation potential. Furthermore, the prediction error distribution of the frequency regulation potential is obtained from the mixed skew model. Because of the characteristics of error partition, the error distribution model and predicted values at different wind speed sections are summarized to generate the uncertainty interval of wind power frequency regulation potential. Numerical experiments demonstrate that the proposed model outperforms other state-of-the-art contrastive models in terms of the refined degree of fitting error distribution characteristics. The proposed model only requires the wind speed prediction sequence to accurately model the uncertainty interval. This should be of great significance for rationally optimizing system frequency regulation resources and reducing redundant backup.

关键词： Inertial response Primary frequency control Error distribution Mixed skew generalized error distribution Uncertainty modeling

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

南岭文书的特征与史料价值

引用

贺州学院学报 2024年第2期40卷 34-40页

作者：吴声军叶景青贺州学院南岭走廊族群文化研究基地广西贺州542899

南岭走廊各民族人民在长期的日常生产生活中留下了大量的民间文书,其内容具有丰富性、民族性、多方言性、系统性和连续性等特征,对弥补南岭走廊的历史文献资料和研究南岭地区土地流转、家庭史和族群关系、民族交往交流交融以及多学科综... 详细信息

南岭走廊各民族人民在长期的日常生产生活中留下了大量的民间文书,其内容具有丰富性、民族性、多方言性、系统性和连续性等特征,对弥补南岭走廊的历史文献资料和研究南岭地区土地流转、家庭史和族群关系、民族交往交流交融以及多学科综合研究有重要的史料价值。

关键词：南岭走廊南岭文书史料价值民族交往交流交融

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

稻渔共生水产品品质特性研究进展

引用

中国稻米 2024年第2期30卷 47-50页

作者：蓝雨丝范广宇吴胜军江苏省海洋生物资源与环境重点实验室/江苏海洋大学江苏连云港222005 江苏海洋生物产业技术联合创新中心江苏连云港222005 江苏海洋生物技术重点建设实验室江苏连云港222005 江苏海洋大学海洋食品与生物工程学院江苏连云港222005 连云港海关综合技术中心江苏连云港222042

稻渔共生是在传统水稻田中种植水稻的同时利用稻田湿地生态系统养殖水产品,实现水稻与水产品共作或轮作的新型农业模式。该模式利用水稻和水产品之间的互利共生作用,降低田间污染、减少病虫害、改善农田生态系统的物质转换效率。为了解... 详细信息

稻渔共生是在传统水稻田中种植水稻的同时利用稻田湿地生态系统养殖水产品,实现水稻与水产品共作或轮作的新型农业模式。该模式利用水稻和水产品之间的互利共生作用,降低田间污染、减少病虫害、改善农田生态系统的物质转换效率。为了解析稻渔共生模式对水产品品质和肠道微生物的影响,促进稻渔综合种养的科学发展,本文综述了水产品的营养、肌肉品质和肠道微生物的研究进展,以为稻渔综合种养产业的高质量可持续发展奠定基础。

关键词：稻渔共生水产品品质肠道微生物营养微生物多样性

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

The development of China's Yangtze River Economic Belt:how to make it in a green way?

引用

Science Bulletin 2017年第9期62卷 648-651页

作者： Yushun Chen Shuanghu Zhang Desheng Huang Bai-Lian Li Junguo Liu Wenjin Liu Jing Ma Fang Wang Yong Wang shengjun wu Yegang wu Jinyue Yan Chuanbo Guo Wei Xin Hao Wang Institute of Hydrobiology & State Key Laboratory of Freshwater Ecology and Biotechnology Chinese Academy of Sciences Wuhan 430072 China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research Beijing 100038 China Policy Research Center for Environment and Economy Ministry of Environmental Protection of P.R. China Beijing 100029 China Ecological Complexity and Modeling Laboratory University of California Riverside CA 92521-0124 USA School of Environmental Science and Engineering Southern University of Science and Technology of China Shenzhen 518055 China Orient Landscape Industry Group Ltd. Beijing 100015 China Department of Biological and Environmental Sciences Alabama A&M University Normal AL 35762 USA Key Laboratory of Reservoir Aquatic Environment & Research Center for Ecological Process of Three Gorges' Eco-Environment Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 China Institute of Eco-city Planning and Design Shanghai BoDa Development Corporation Shanghai 200333 China KTH-Royal Institute of Technology SE-10044 Stockholm Sweden & Malardalen University SE-72123 Vasteras Sweden

The Yangtze River is one of the largest and longest rivers in Asia.The river originates in the Tibet-Qinghai Plateau(headwater reach),passes through the mountainous provinces of Sichuan,Yunnan and Chongqing(upper reach),flows into the Central Plain(middle reach)and Lower Plain(lower reach),and finally empties into the East China Sea in Shanghai(estuary).The Yangtze River Economic Belt(YREB;Fig.1)has a surface area of 2.1

关键词： In The development of China’s Yangtze River Economic Belt:how to make it in a green way

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

Food nutrition and hygiene course teaching reform

引用

校园英语 2019年第44期 4-5页

作者： shengjun wu College of Marine Life and Fisheries Jiangsu Ocean UniversityJiangsu Key Laboratory of Marine BiotechnologyHuaihai Institute of TechnologyJiangsu Marine Resources Development Research Institute

Food nutrition and hygiene course is one of professional courses for undergraduate specialty of food science and engineering.In order to improve the teaching quality of food nutrition and hygiene courses and to cultivate high-quality food science and engineering professionals for the society,based on the teaching practice,this paper analyzed the status quo of food nutrition and hygiene course and the necessity of teach reform and explored how to improve the teaching quality of food nutrition and hygiene course from aspects of teaching contents,teaching methods and assessment methods.

关键词： Food nutrition and hygiene course Teaching status quo Teaching reform

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

汽车乘员约束系统仿真及其参数优化

引用

湖北汽车工业学院学报 2024年第2期38卷 12-16页

作者：杨凯吴胜军胡秋雷湖北汽车工业学院汽车工程学院湖北十堰442002

在汽车有限元模型基础上建立了乘员约束系统模型,进行了100%正面刚性壁碰撞仿真分析。结合碰撞分析中假人伤害值,采用灵敏度分析筛选出对约束系统影响较大的参数作为设计变量,构建了关于加权伤害指标的Kriging代理模型,运用多岛遗传算... 详细信息

在汽车有限元模型基础上建立了乘员约束系统模型,进行了100%正面刚性壁碰撞仿真分析。结合碰撞分析中假人伤害值,采用灵敏度分析筛选出对约束系统影响较大的参数作为设计变量,构建了关于加权伤害指标的Kriging代理模型,运用多岛遗传算法进行参数优化。结果表明,加权伤害指标降低了38.92%,达到设计目标。

关键词：约束系统代理模型乘员伤害

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：