Subjects: Library Science，Information Science >> Library Science submitted time 2023-10-08 Cooperative journals: 《知识管理论坛》
Abstract： [Purpose/significance] The analysis of technological topic evolution is of great significance for understanding the technological development process and forecasting technology trends in the future. Exploring the roadmap of research methods of technological topic evolution analysis helps is helpful to understand its research status and lay the foundation for further research. [Method/process] This paper divided the existing research methods of technological topic evolution analysis into three major categories: qualitative methods, quantitative methods and hybrid methods combining qualitative and quantitative analysis, and then describes representative methods for each category. [Results/conclusion] Based on the systematic analysis of current research methods of technological topic evolution, the author discusses the shortage of existing research methods and prospects for future research.
Subjects: Library Science，Information Science >> Library Science submitted time 2023-08-26 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] Analyzing the evolution of technological topic makes it possible for us to track the development of technology, which is essential for improving innovation activity and forecasting development trends of technology. However, to our knowledge, scholars pay less attention to the semantic perspective of technological topic. Therefore, this paper intends to analyze the evolution of technological topic from the perspective of semantic.[Method/process] This paper proposed a dynamic topic model based on non-negative matrix factorization, and labeled the technology topics with noun phrases extracted by TextRank algorithm, which enhances the interpretability. Then, the study computed and visualized the evolutionary trajectory of technological topics with word embedding.[Result/conclusion] This paper uses five countries' (China, America, Japan, South Korea, Europe) patent data in 2002, 2005, 2008, 2011 and 2014 to test our model. During the course of the experiment,our method extracted evolutionary trajectories of 65 technical topics, which verified the effectiveness of our method.
Subjects: Computer Science >> Computer Application Technology submitted time 2017-03-10
Abstract：在异构网络不断发展的今天，如何融合不同无线接入技术，为用户提供更多样化的业 务形式和更好的用户质量体验成了亟待解决的问题。本文从接入层面对新一代融合通信网络 中空中接口协议栈系统进行分析，阐述设计过程中的技术难点并提出对应解决方案。后， 提出面向新一代融合通信的协议栈系统架构。
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