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基于调度场算法实现长逻辑表达式解析与创建
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作者 张文晓 《信息与电脑》 2020年第6期38-43,共6页
笔者主要介绍了如何基于调度场算法将长逻辑表达式解析成表达树,并在在VB.net的TreeView控件上显示,从而实现逻辑关系的可视化。并且,反向地,可以通过编辑逻辑表达树,再由程序反向生成逻辑表达式,作为输入参数供其他软件读取。这样就可... 笔者主要介绍了如何基于调度场算法将长逻辑表达式解析成表达树,并在在VB.net的TreeView控件上显示,从而实现逻辑关系的可视化。并且,反向地,可以通过编辑逻辑表达树,再由程序反向生成逻辑表达式,作为输入参数供其他软件读取。这样就可以将复杂难懂的计算机语言转化为普通用户易懂的图形化表达,从而能提高效率、减少错误。 展开更多
关键词 调度场算法 逻辑表达式解析 前缀表达式 后缀表达式 表达树
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Impact of Departure Time Uncertainty on Runway Scheduling
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作者 ZHANG Qiqian XU Dongxu +1 位作者 ZHANG Ying ZHANG Xiaowei 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2021年第6期948-958,共11页
The flight departure process is affected by various uncertain factors,such as flight delays,scheduling delays and taxi time etc. A reliable and robust departure sequence is very important to the safe and efficient ope... The flight departure process is affected by various uncertain factors,such as flight delays,scheduling delays and taxi time etc. A reliable and robust departure sequence is very important to the safe and efficient operation for airports. An optimal scheduling model for multi-runway departure considering the arrival aircraft crossing departure runway is developed. A genetic algorithm encoding flight numbers is designed to find a near-optimal solution. After that,further establish a multi-objective dynamic scheduling model and design a hybrid algorithm to solve it,and compare and analyze the results of the two models. A quantitative analysis of departure time based on the kernel density estimation is performed,and Monte Carlo simulations are carried out to explore the impact of flight departure time’s uncertainty on departure scheduling. The results based on historical data from Guangzhou Baiyun Airport are presented,showing the advantage of the proposed model and algorithm. 展开更多
关键词 UNCERTAINTY departure scheduling multi-runway scheduling genetic algorithm
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