利用新技术新仪器和新的作业模式减轻城市基础地理信息系统的更新费用，提高城市基础地理信息系统的更新速度。
By making use of new technique new instrument and new processing mode, alleviate the expenses of UBGIS data revision, and increase the project speed of UBGIS data revision.
为此，提出一种自适应的信息素更新方法和消除无效分配的变异策略，提高了收敛速度。
So an adaptive method of updating pheromone and a mutation strategy of clearing up invalid assignment were introduced to increase convergent speed.
随着信息集成时代的到来，产品更新换代的速度按指数递增。
With the advent of the age of information integration, the product renovation rate becomes a exponential function.
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