[目的/意义] 技术主题图是进行技术布局分析、技术路线跟踪的有效方法之一。为提高技术主题图绘制效率，增强技术主题图表现形式，丰富科技情报分析人员选择技术主题图绘制工具范围。[方法/过程] 提出一种简易的技术主题图绘制方法，融合Fruchterman-Reingold layout和VosMapping算法进行主题词的平面布局，建立平面像素点密度函数，依据密度值进行色彩渲染，得到技术主题图。[结果/结论] 基于该方法设计软件工具，分为数据处理模块、节点布局模块、图形渲染模块、人机交互模块。将该方法应用于3D打印中国论文数据进行实证应用，结果表明该方法简单有效。
[Purpose/significance] The technology theme map is one of the effective methods to carry out the technical analysis and technical route tracking. To draw a technology theme map more economically and clearly,an economic method of drawing a technology theme map is proposed. [Method/process] Fruchterman-Reingold and VosMapping algorithm were used to compute keywords.Then, a plane pixel density function was uesed to draw a map.[Result/conclusion] The software including data processing, node layout, graphics rendering, human-computer interaction based on the proposed method is designed. The method is applied to the 3D printing patent in China. The results show that the method is simple and effective.
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