基于改进LDA主题模型的中日美氢能产业链技术布局研究*

摘要

[目的/意义]氢能技术主要掌握于中日美三国,研究中日美在氢能领域产业链上的技术布局,对于科学制定技术创新战略﹑抢占发展制高点具有重要意义. [方法/过程]在赋予技术词产业链与IPC语义的基础上,构建WIC-I-LDA主题模型挖掘氢能领域技术主题,并运用改进的综合主题强度计算模型,计算三国在各产业链﹑技术主题的研究热度,依此对氢能技术布局及各国优势﹑短板和发展趋势进行深度分析.[结果/结论]研究表明:中日美三国基本处于同步发展阶段,都注重氢能的制备与应用,但也各有侧重:中国技术布局优势主要集中在氢能制备,日本优势主要集中在氢能的纯化与应用,美国优势主要集中在氢能储运,金属及其氧化物制氢﹑甲醇制氢﹑液化储氢与金属氧化物储氢技术主题是三国共同的关注点,均呈上升趋势.%The hydrogen energy technology is mainly controlled by the three countries of China, Japan and the United States. It is of great significance to study the technological layout of China, Japan and the United States in the industrial chain of hydrogen energy, and to scientifically formulate technological innovation strategies and seize the commanding heights of development. [ Method/Process]On the basis of giving the technical word industry chain and IPC semantics, the WIC-I-LDA theme model is construcˉted to explore the technical theme of the hydrogen energy field, and the improved comprehensive topic intensity calculation model is used to calculate the research enthusiasm of the three countries in various industrial chains and technical topics. According to this, the hydrogen energy technology layout and the advantages, shortcomings and development trends of countries are deeply analyzed. [ Result/Concluˉsion]The research shows that the three countries of China, Japan and the United States are basically in the synchronous development stage, and they all pay attention to the preparation and application of hydrogen energy, but they also have their own emphasis: the advantages of China's technology layout are mainly concentrated on hydrogen energy preparation, and the Japanese advantage is mainly concentrated on the purification and application of hydrogen energy. The US advantage is mainly concentrated in hydrogen storage and transportation, the theme of hydrogen production from metals and their oxides, hydrogen production from methanol, liquefaction hydrogen storage and metal oxide hydrogen storage technology are the common concerns of the three countries, all of which are on the rise.