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  15. 7575

    Study on Sustainable Utilization of Water Resources i n Karst Regions of Guangxi by GUANG Yao_hua

    Published 2001-01-01
    “…Guangxi is characterized by uneven distribution of water resources in time and space,serious flood and waterlogging,fragile ge ologic environment in karst regions,soil erosion and wide spreading of rock dese rts.I n supply and demands of water resources problems lie in insufficient storage cap acity,water pollution and poor management of water resources.It is concluded tha t all karst regions in Guangxi fall short of water in varying degrees except for those situated in northeast Guangxi.For developing water resources in karst reg ions in Guangxi the author puts forward the following measures:exploiting modera tely karst water to increase the ratio of ground water in water resources deve l opment;storing rationally both surface and ground water to enhance active capaci ty;overdrawing artificially the shallow karst water and recharging;exploiting ka rst rivers;buliding rain collection tanks;speeding up construction of large hyd r aulic and hydropower projects;building headwater forest areas;spreading water sa ving farming;strengthening protection and management of water resources environm ent and relocating extremely poor population inhabited in karst regions.The auth or also introduces briefly the optimum regional allocation of water resources.…”
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  16. 7576

    Interplanting Secondary Crops into Existing Strawberry Fields. by John R. Duval, E. A. Golden, Alicia Whidden

    Published 2005-02-01
    “… To increase the utility of land preparation, existing plastic mulch, and micro-irrigation, strawberry growers in the Plant City area often plant secondary crops among winter annual strawberries. …”
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  17. 7577

    L’héritage des tracés d’époque coloniale française en Algérie face au projet urbain by Abdelkrim Bitam

    Published 2011-07-01
    “…We will finish with some simulations of the structural impacts on the present city. We shall conclude by suggesting that it is necessary to know and to acknowledge this implicit material memory. …”
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  18. 7578

    Performance analysis of dual non-orthogonal multiple access technology in the Internet of things by Dongbo LI, Min JIA, Qing GUO, Xuemai GU, Xiaofeng LIU

    Published 2019-03-01
    “…With the rapid development of many technologies such as smart city,artificial intelligence and edge computing,the future Internet of things will face the problems of massive terminal access and spectrum resource constraints.A dual non-orthogonal multiple access (D-NOMA) technology based on high spectral efficiency secure access (HSESA) was proposed,which combined non-orthogonal access in the code domain and non-orthogonal multiplexing in the frequency domain,and had good spectral efficiency performance.The sender and receiver were optimized,and multiple users were mapped directly to the overlapping subcarriers through the sparse codebook.The performance analysis under the Rician channel shows that D-NOMA has better bit error rate performance than HSESA.…”
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  19. 7579

    « Shopping mall » et « modernisation » des villes africaines : les cas de Douala (Cameroun) et Kigali (Rwanda) by Benjamin Michelon

    Published 2017-12-01
    “…In most African cities, the “modernization” of urban life is changing the nature of trade and is relocating shopping areas. …”
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  20. 7580

    José Olallo Valdés: a Cuban male nurse to be remembered by Onassys Barreiro Alberdi, Yanet Blanco Fleites

    Published 2009-05-01
    “…On November, 29th the Catholic Church beatified him in Camagüey city. He belonged to the order San Juan de Dios, founded by a Portuguese religious man in 1539.…”
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