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    Analysis of Temporal and Spatial Evolution Characteristics of Rainfall in Dongguan in the Past 30 Years by WANG Qiuliang, SUN Xiang, GAN Dufen, MEI Xinpei, CHENG Jie, ZAN Xiongfeng

    Published 2022-01-01
    “…Dongguan is an important city in the Guangdong-Hong Kong-Macao Greater Bay Area,which is a major contributor to the economic development of this area.However,its urban planning,rational allocation of water resources,flood prevention and disaster reduction are severely affected by torrential rain and floods,and thus its high-quality economic development is seriously hindered.Therefore,by using the 32-year daily rainfall data of 30 hydrological stations in Dongguan,this paper adopts methods such as GIS,the Mann-Kendall test,moving average,and cumulative anomaly to discuss the temporal and spatial distribution of rainfall in Dongguan.The results reveal that in the past 32 years,the temporal and spatial distribution of annual rainfall has gradually increased from west to east with a significant rising trend over time.During the flood season,the rainfall increases sequentially from west to east and gradually decreases from the central part to west,and from the central part to east,it drops before it rises.Rainfall in the flood season accounts for about 60%~95% of the annual total.The rainfall in the non-flood season is prominent in the central part,with great differences between east and west,namely that the rainfall in the central part tends to decrease gradually to both sides,and the southwestern part registers the smallest.The center of the maximum rainfall in the four seasons moves from the central part to the northeast,east,and central,and the southwest still records the minimum rainfall.The monthly average rainfall generally shows an increasing trend from west to east:Many years of data indicates that the average rainfall in June is the largest,accounting for 18.58% of the rainfall all year,while December sees the smallest,accounting for 1.88% of the yearly total.The research results can provide reference and support for the later development of Dongguan.…”
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    Unusual Cutaneous Manifestations in a Patient with a History of Hepatitis B: A Case of Scleromyxedema and Literature Review by Gao A, Tian X, Lang D, Chen Y

    Published 2025-01-01
    “…Aili Gao, Xin Tian, Dexiu Lang, Yue Chen Department of Dermatology, Guangzhou Dermatology Hospital, Guangzhou, Guangdong, People’s Republic of ChinaCorrespondence: Yue Chen, Department of Dermatology, Guangzhou Dermatology Hospital, Guangzhou, People’s Republic of China, Tel/Fax +86-020-83593472, Email cheny767@mail3.sysu.edu.cnAbstract: Scleromyxedema (SM) is a rare primary cutaneous mucinosis characterized by systemic papules and scleroderma-like manifestations, often associated with monoclonal gammopathy. …”
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    Sustainable Development of Water Resources Carrying Capacity Based on System Dynamics: A Case Study of Ganzhou City by WANG Xiaojun, YANG Huan, LI Zhenping, YAN Wenfeng, LAN Sijiao, DU Chao

    Published 2022-01-01
    “…As Ganzhou is the birthplace of Ganjiang River,Dongjiang River,and Beijiang River (“Three Rivers”),the security and sustainable development of its water resources are of great significance to the ecological security and sustainable development of both the Yangtze River Economic Belt downstream and the Guangdong-Hongkong-Macao Greater Bay Area.Thus,seeking the optimal sustainable development mode that Ganzhou's water resources can carry and ensuring the safety and sustainable use of those water resources are currently urgent issues to be solved.In this study,we employ the system dynamics method to build a system dynamics model of Ganzhou's water resources carrying capacity by analyzing its influencing factors and the system feedback loop and dividing the carrying capacity system into three sub-systems of social economy,water resources,and water environment.Moreover,four scenarios of normal development,economic priority,environmental priority,and comprehensive and coordinated development are designed to simulate Ganzhou's water resources carrying capacity during 2020—2035 and dynamically evaluate and simulatively predict its sustainable development capacity under each scenario.The results indicate that among the four scenarios,all the normal development and economic priority scenarios that sorely pursue the continuation of the current development status of social economy and the environmental priority scenario that protects water resources at the expense of social economy development fail to guarantee the sustainable development of water resources and social economy.In contrast,under the comprehensive and coordinated development mode,the chemical oxygen demand (COD) emissions will remain at a low level of 132 900 t by 2035 while economic development rises to a relatively high level,with GDP reaching 1 197.13 billion CNY.It follows that this mode not only ensures economic development but also takes into account the ecological environment.Therefore,the comprehensive and coordinated development scenario that comprehensively considers social economy development,environmental protection,and other factors is the optimal sustainable development mode that can be carried by water resources.…”
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