能降低成本的 meaning in Chinese

cost-effective

And with its result , 1 : 2000 digital maps of the surroundings in lake dianchi are minified to 450 square kilometers 1 . 10000 digital maps . this paper will deal with the theoretical principle of the applied programs the methods of the underwater topography surveying and the principle of the data processing program and digital mapping program , analyze the rationality and operability and automatic extent of the outside and inside working methods and the data processing program . according to the working experiences , this paper generalizes a low cost , practical and automatic method of underwater topographic survey hi inland lake and river basin
昆明理工大学硕士研究生论文论文摘要( abs切act )本文就项目所涉及的理论基础、技术方法、作业手段、数据处理、内业成图等方面的内容进行系统地阐述;并介绍了项目实施中所采用的一些特色技术、特殊方法，以期为类似项目在应用方面提供有价值的、合理的、操作性强的、自动化程度高的、能降低成本的、提高经济效益的实用技术、方法和经验。