在抽油机支架强度分析中， 在全局坐标系下确定主惯性平面方位的参考节点的位置非常困难。
In the strength analysis of the pumping jack of a pumping unit, it is very difficult to determine the reference node position under global coordinate system.
在全局搜索过程中，利用信息素强度和启发式函数确定蚂蚁移动方向。
Using pheromone and heuristic function, an ant moving direction can be determined during global searching.
针对不同强度威胁源构成的飞行环境，提出了一种基于人工势场法和遗传算法相结合的无人机全局航路规划方法。
Based on the artificial potential field and genetic algorithms, a method of flight path planning for UAV in the threat network was proposed.
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