[目的/意義]分析科研主題的復雜演化過程,能夠幫助學者及時把握研究熱點、研究前沿和發展趨勢,然而目前主題演化相關研究主要從單一維度進行演化分析。[方法/過程]文章構建了基于主題熱度、狀態和演化路徑3個維度的主題演化分析模型,以碳納米管研究領域為例進行了實證研究,首先對相關科技文獻數據進行采集、預處理,并利用PLDA模型進行主題識別,然后基于多維主題演化分析模型,結合可視化技術,構建了多個維度的科學知識圖譜,分析了主題熱度、演化狀態、宏觀演化脈絡和微觀演化路徑,清晰地描繪了碳納米管領域的主題演化脈絡、趨勢。[結果/結論]研究結果表明,多維主題演化分析模型能夠準確分析主題演化生命周期的復雜過程。

[Purpose/significance] Analysis on the complex process of scientific research topic evolution can help scholars grasp research focus, research frontiers and developing trend, however the current topic evolution researches mainly analyze evolution from a single dimension. [Method/process] This paper builds a topic evolution analysis model based on the topic popularity, evolution status and evolution path, with carbon nanotubes research area as an example for the empirical research. Firstly, the paper collects and preprocesses relevant scientific literature data, and uses the PLDA model to identify the topics. Then based on the multi-dimensional topic evolution analysis model, combining with visualization technology, the paper constructs the multi-dimensional scientific knowledge map to analyze the topic popularity, evolution status, macro evolution venation and micro evolution path,which can clearly depict the topic evolution venation and trends in the field of carbon nanotubes. [Result/conclusion] Results show multi-dimensional topic evolution analysis model can accurately analyze the complex process of the topic evolution life cycle.