将最短路径的信息反馈到系统中作为搜索的指导信号，并改进节点选择方法，以提高应用蚁群算法搜索无人机三维航路的效率。
To improve the efficiency of path planning, the message of the shortest path was introduced in the system as a searching guidance signal, and a modified nodes selection method was also given.
场地器材、无人组织指导，没有时间是影响大学生参加课外体育活动的主要因素；
Location and equipment, unmanned organization and instruct, having no time is the primary factor of influencing the extracurricular sports activities;
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