Based on the difference expansion and difference shifting, a novel reversible watermarking algorithm for digital vector map is proposed.
利用差分平移和差分扩张，提出一种新的应用于数字矢量地图的可逆水印算法。
Secondary development of map sheet decoration which is based on the Geographic Information System (GIS) platform is not conducive to the migration and expansion of functions.
基于地理信息系统(GIS)平台二次开发的地图图幅整饰不利于移植及功能扩展。
In calculating on the basis of the results painted a screw expansion of the expansion process of pressure, temperature changes in relations with the corner of the map and a detailed analysis.
在计算结果的基础上描绘了螺杆膨胀机膨胀过程内工质压力、温度随转角的变化关系图，并进行了详细的分析。
Automatic cartography including automatic map generalization and expansion has become an important geographic research area.
地图制图自动化已成为地理研究的重要内容，包括自动综合和自动扩充。
According to the dual theory, the dual programming was used to map the original problem exactly and the second approximation of the dual problem was set up by Taylor's expansion.
根据对偶理论，应用对偶规划精确映射原问题，再按泰勒展式建立对偶问题的二阶近似。
Zhejiang Stoker Group, Inc. spermidine and products such as plant expansion project to pipe layout and map production process, production and possession of the table material statistics;
浙江嘉化集团股份有限公司精胺及系列产品等生产装置改扩建工程管路布置图、工艺流程图制作、管段表制作及材料统计；
Zhejiang Stoker Group, Inc. spermidine and products such as plant expansion project to pipe layout and map production process, production and possession of the table material statistics;
浙江嘉化集团股份有限公司精胺及系列产品等生产装置改扩建工程管路布置图、工艺流程图制作、管段表制作及材料统计；
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