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漳河河道综合治理规划综述
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作者 曹辉 《水利规划与设计》 1997年第2期57-60,共4页
漳河是海河流域南系漳卫南运河的主要行洪河道,现有险工32处,亟待整治。根据《海河流域规划》,漳河治理按防御1963年型洪水标准设计,配合岳城水库三级控制运用。考虑其水文泥沙特点及游荡性河道形态特征,拟采用整治线宽度在400m~600m... 漳河是海河流域南系漳卫南运河的主要行洪河道,现有险工32处,亟待整治。根据《海河流域规划》,漳河治理按防御1963年型洪水标准设计,配合岳城水库三级控制运用。考虑其水文泥沙特点及游荡性河道形态特征,拟采用整治线宽度在400m~600m的宽控方案。该方案较充分利用现有护险工程,与历史洪水的流路吻合,投资少,适应性强。该方案的实施将形成较完整的防洪体系。从根本上解决漳河的防洪问题。 展开更多
关键词 漳河 综合治理 宽控方案
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Reservation-based dynamic admission control scheme for wideband code division multiple access systems
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作者 A.Y.Al-nahari S.A.El-Dolil +1 位作者 M.I.Dessouky F.E.Abd El-Samie 《Journal of Central South University》 SCIE EI CAS 2012年第2期393-401,共9页
Call admission control (CAC) and resource reservation (RR) for mobile communication are two important factors that guarantee system efficiency and quality of service (QoS) required for different services in a very sca... Call admission control (CAC) and resource reservation (RR) for mobile communication are two important factors that guarantee system efficiency and quality of service (QoS) required for different services in a very scarce resource as the radio spectrum. A new scheme was proposed which extends the concepts of resource sharing and reservations for wideband code division multiple access (WCDMA) systems with a unique feature of soft capacity. Voice and data traffic were considered. The traffic is further classified into handoff and new requests. The reservation thresholds were dynamically adjusted according to the traffic pattern and mobility prediction in order to achieve the maximum channel utilization, while guaranteeing different QoS constraints. The performance of proposed scheme was evaluated using Markov models. New call blocking probability, handoff call dropping probability, and channel utilization were used as benchmarks for the proposed scheme. 展开更多
关键词 admission control resource reservation wideband code division multiple access resource utilization
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