landing interval meaning in English

降落间隔
着陆间隔

In this paper , by using cost functions of flights , a model is presented to schedule aircraft landings , which satisfies the landing intervals and separation constraints , and puts forward a heuristic algorithm by using local search and linear programming
利用航班的成本函数，建立了满足着陆间隔、着陆时间段等约束的着陆规划模型，提出了一种使用局部搜索和线性规划的启发式算法。