Division is the basis of forest resources survey and forestry map drawing.
区划是森林资源调查和林业用图制作的基础。
In forestry, map also occupies an important position, the all levels forest division, forest planning, the forest resources inventory, the forest management inventory, felling series design etc.
在林业生产中，地图更是占有重要的地位，各级林业区划、规划、森林资源清查、森林经理调查、伐区作业设计等都离不开地图。
Dispersion-managed soliton interaction is investigated in an optical time-division multiplexed system with random dispersion map by the variational approach and the numerical simulation.
本文采用变分法和数值方法研究了具有随机色散的光时分复用系统中色散管理孤子相互作用。
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