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稳态强磁场实验装置水冷磁体运行水质变化探究
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作者 周彭 周辰飞 唐佳丽 《低温工程》 CAS CSCD 北大核心 2022年第5期48-52,共5页
通过研究磁体静置及大流量循环时的电阻率变化,发现经大流量循环的磁体水质下降速率远大于静置时的磁体。分析循环管路上过滤器滤网上的粉末成分,探究了电阻率下降的原因。经测定,粉末主要成分为铜和银,而磁体比特片采用铜银合金表面镀... 通过研究磁体静置及大流量循环时的电阻率变化,发现经大流量循环的磁体水质下降速率远大于静置时的磁体。分析循环管路上过滤器滤网上的粉末成分,探究了电阻率下降的原因。经测定,粉末主要成分为铜和银,而磁体比特片采用铜银合金表面镀银工艺,大流量循环会对磁体造成剥蚀。实验证明提纯比例达到6%的提纯系统可迅速提升循环水水质,且可有效确保电阻率在高场实验中保持15 MΩ·cm以上。 展开更多
关键词 水冷磁体 提纯系统 比特片 高场运行
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OPTIMIZATION OF AIRPORT TAXIING PLANNING DURING CONGESTED HOURS BASED ON IMMUNE CLONAL SELECTION ALGORITHM 被引量:1
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作者 柳青 吴桐水 宋祥波 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2012年第3期294-301,共8页
In order to ease congestion and ground delays in major hub airports, an aircraft taxiing scheduling optimization model is proposed with schedule time as the object function. In the new model, the idea of a classical j... In order to ease congestion and ground delays in major hub airports, an aircraft taxiing scheduling optimization model is proposed with schedule time as the object function. In the new model, the idea of a classical job shop-schedule problem is adopted and three types of special aircraft-taxi conflicts are considered in the constraints. To solve such nondeterministic polynomial time-complex problems, the immune clonal selection algorithm(ICSA) is introduced. The simulation results in a congested hour of Beijing Capital International Airport show that, compared with the first-come-first-served(FCFS) strategy, the optimization-planning strategy reduces the total scheduling time by 13.6 min and the taxiing time per aircraft by 45.3 s, which improves the capacity of the runway and the efficiency of airport operations. 展开更多
关键词 aircraft taxiing schedule airport operation control hub airport congested hours immune clonal selection algorithm(ICSA)
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