Pengfei Zhan

China Mobile (China)

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i-10 index

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Jingying Zhu

Maternal and Child Health Hospital of Xinjiang Uygur Autonomous Region

Yongwei Sheng

University of California, Los Angeles

Ning Wang

Shanghai University

Tan Chen

Binzhou University

Chenyu Fan

University of Chinese Academy of Sciences

Linghong Ke

Brookhaven National Laboratory

Shuangxiao Luo

Nanjing Institute of Geography and Limnology

Jida Wang

Wuhan University

Jin Gao

Kunming University of Science and Technology

Chunqiao Song

University of Chinese Academy of Sciences

Cooperative Institutions

Chinese Academy of Sciences

Nanjing Institute of Geography and Limnology

University of Chinese Academy of Sciences

Huazhong University of Science and Technology

Hohai University

Shanghai University

Harbin Institute of Technology

University of California, Los Angeles

Central South University

Zhengzhou University

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A comprehensive geospatial database of nearly 100,000 reservoirs in China

Chunqiao Song Chenyu Fan Jingying Zhu Jida Wang Yongwei Sheng

Abstract. With rapid population growth and socioeconomic development over the last century, a great number of dams/reservoirs have been constructed globally to meet various needs. China has strong economical and societal demands for constructing dams and reservoirs. The official statistics reported more than 98,000 dams/reservoirs in China, including nearly 40 % of the world’s large dams. Despite the availability of several global-scale dam/reservoir databases (e.g., the Global Reservoir and Dam database (GRanD), the GlObal geOreferenced Database of Dams (GOODD), and the Georeferenced global Dams And Reservoirs (GeoDAR)), these databases have insufficient coverage of reservoirs in China, especially for small and newly constructed ones. The lack of reservoir information impedes the estimation of water budgets and evaluation of dam impacts on hydrologic and nutrient fluxes for China and its downstream countries. Therefore, we presented the China Reservoir Dataset (CRD), which contains 97,435 reservoir polygons as well as fundamental attribute information (e.g., name and storage capacity) based on existing dam/reservoir products, national basic geographic datasets, multi-source open map data, and multi-level governmental yearbooks and databases. The reservoirs in compiled CRD have a total maximum water inundation area of 50,085.21 km2 and a total storage capacity of about 979.62 Gt (924.96–1060.59 Gt). The quantity of reservoirs decreases from the southeast to the northwest, and the density hotspots mainly occur in hilly regions and large plains, with the Yangtze River Basin dominating in reservoir count, area, and storage capacity. We found that these spatial accumulations of reservoirs are closely related to China’s socioeconomic development and the implementation of major policies. Finally, we discussed the improvements of CRD in comparison with GOODD, GeoDAR, and GRanD datasets. CRD has significantly improved the reservoir count, area, and storage capacity in China, especially for reservoirs smaller than 1 km2. The CRD database provides more comprehensive reservoir spatial and attribute information and is expected to benefit water resources managements and the understanding of ecological and environmental impacts of dams across China and its affected transboundary basins.

Georeference

10.5194/essd-2022-179

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The Implementation and Test for HIL Real-time Simulation of Doubly-fed Induction Generator Based on FPGA

Jin Gao Ning Wang Jing Wang Siyu Wang Pengfei Zhan

Traditional test platform of doubly-fed wind power generation system has high investment cost and huge energy consumption. A hardware-in-loop (HIL) simulation test system of digital virtual doubly-fed induction generator (DFIG) is proposed in this paper. In the FPGA-based DFIG HIL real-time simulation platform, an inverter model and a high-precision mathematical model of DFIG based on d-q synchronous reference frame are established. Moreover, the accuracy and time delay characteristics of the model are considered in the process of FPGA programming. In order to test DFIG model precision, two experimental test platforms are presented, one is HIL Bench, the other is physical DFIG Bench. Taking the physical DFIG Bench as a reference, VSCF experiment and the grid-connected experiment were carried out on two benches under the same conditions. Analyzed results show that the DFIG HIL model is real-time and accurate.

Test bench

Hardware-in-the-loop simulation

Real-Time Simulation

10.1109/icems.2019.8922247

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Machine learning method for estimating lake mean depth and volume from the deepest record

Zenodo (CERN European Organization for Nuclear Research) (2022)

Pengfei Zhan Chunqiao Song

10.5281/zenodo.6578821

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Real-time Simulation of No-load Grid-connection Based on dSPACE Doubly-Fed Wind Power Generation System

2022 IEEE 6th Advanced Information Technology, Electronic and Automation Control Conference (IAEAC ) (2019)

Ning Wang Jing Wang Pengfei Zhan Siyu Wang Jin Gao

As a flexible grid-connection method, idle-load grid-connection is widely used in AC excitation variable speed constant frequency (VSCF) wind power generation systems with Doubly-Fed Induction Generator (DFIG). In this paper, the idle-load grid-connection control strategy of the VSCF doubly-fed wind turbine is designed. Under the condition of open circuit on the stator side, the rotor exciting current is adjusted to realize VSCF at the stator side while decoupling the output active power and reactive power. Finally, a semi-physical real-time simulation platform of doubly-fed wind power generation system based on dSPACE is established. As a result, there was no inrush current at the time of grid-connection, which verified the correctness of the control strategy, at the same time, accuracy and real-time of the control system were proved.

Grid connection

Decoupling (probability)

DSPACE

Idle

Inrush current

10.1109/iaeac47372.2019.8998039

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基于卡尔曼滤波参数自学习的大坝变形预测 (Parameter Self-learning Method Based on Kalman Filter for Dam Deformation Prediction).

计算机科学 (2017)

Pengfei Zhan Xin Lv Yingchi Mao Shufang Xu Longbao Wang

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Effects of deformation rate and hydrated condition on the mechanical property of sandstone

DOAJ (DOAJ: Directory of Open Access Journals) (2020)

Teng Teng DU Yu-bing Pengfei Chen Pengfei Zhan

10.19606/j.cnki.jmst.2020.03.013

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Citations (1)

ji yu cai wu guan li jiao du xia hei long jiang sheng zhi zao ye ren gong cheng ben kong zhi yan jiu

Market Modernization (2017)

Pengfei Zhan Zhang Yupeng

Guan

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Evaluation of port logistics performance based on fuzzy comprehensive analysis

Journal of Bohai University (2013)

Pengfei Zhan

As the economic globalization develops deeply,the trades among countries become more frequent,which makes the port logistics activities be in an increasingly important role in the economic development,and the evaluation of the port logistics activities performance is a kind of effective means to enhance the competitiveness in port logistics activities.How to analyse and evaluate the port logistics operation performance scientifically and comprehensively has become the topic part to be solved in the logistics activities.This paper constructs index system of the port logistics performance comprehensive evaluation,and then applies the synthetic vague mathematical analysis method to evaluate and analyse quantitatively the performance of the port logistics activities.The paper about Jinzhou port logistics activities is an empirical analysis,and the results can really reflect the port logistics activities situation.

Port (circuit theory)

Integrated logistics support

Economic Globalization

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A comprehensive geospatial database of nearly 100,000 reservoirs in China

Zenodo (CERN European Organization for Nuclear Research) (2022)

Chunqiao Song Chenyu Fan Jingying Zhu Jida Wang Yongwei Sheng

Data components Folder "CRD v1.1" contains the recorded (5,143) reservoirs from yearbook and document data and all (97,435) reservoirs from CRD v1.1 (China Reservoir Database) two parts: • CRD_v11_all_reservoirs (in both shapefile format and the comma-separated values (csv) format): This database catalogs the location information of 97,435 reservoirs in China, with an aggregated area of 50,085.21 km2 and an estimated total storage capacity of 979.62 Gt. The attributes of all the CRD v1.1 reservoirs (in all cases) include location information (longitude, latitude, province, prefecture, and county), inundation area, estimated storage capacity, river order, discharge, and residence time of reservoirs. • CRD_v11_record_reservoirs (in both shapefile and csv): The 5,143 reservoirs in the CRD v1.1 database were directly derived from the yearbook and other documents data, accounting for 59% and 82% of the total reservoir area and storage capacity of the CRD v1.1 database, respectively. This reservoir information was mainly obtained through manual compilation. The attributes of the recorded reservoirs include the longitude and latitude of the reservoir, name, province, prefecture, and county where the reservoir is located, water area, water level of normal storage capacity, storage capacity, reservoir class, main use, and regulation type. Note: Thank you for accessing the CRD v1.1 dataset, which is available through the new link: https://www.scidb.cn/s/zqIFVr; DOI: 10.57760/sciencedb.05331

10.5281/zenodo.6984619

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Citations (5)

I型コラーゲンとプロリル4-ヒドロキシラーゼΑ-蛋白質を発現するトランスジェニックカイコ系統を構築した。【JST・京大機械翻訳】

Canye Kexue (2016)

Pengfei Zhan Shaohua Huang Yuncai Liu Dong Jiuming Yusong Xu

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