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Structural dynamics of keyword networks: Liquid crystal display and plasma display panel cases

机译：关键字网络的结构动力学：液晶显示器和等离子显示器面板盒

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This study focuses on understanding scientific evolution by using keyword co-occurrence networks, where keywords appearing in a scientific article are linked with a weight equal to the number of co-occurrences. To characterize structural changes of the network, we examine distributions of sums of weights by node over time. In particular, a change of power-law behavior is utilized to explore scientific evolution, such as emerging scientific paradigms and advancing normal science. As an illustration of the method used, the development of Liquid Crystal Displays (LCDs) and Plasma Display Panels (PDPs) is tracked. We detect two-tiered power-law distributions in the initial stage of scientific growth in both technologies due to differences in research intensity between two groups. The groups of keywords more likely to attract researchers' interest than others are incrementally developed until the mid-2000s to overtake those prior. Finally, we can capture a merging point of the dichotomous structure of PDPs but LCDs maintain the structural separation throughout the adjustment area. We expect that this structural investigation of keyword co-occurrence networks provides an indicator to diagnose the research evolution in that field. (C) 2016 Published by Elsevier B.V.
机译：这项研究着重于通过使用关键词共现网络来理解科学发展，其中，科学文章中出现的关键词的权重等于共现次数。为了表征网络的结构变化，我们检查了节点随时间的权重总和分布。特别是，利用权力法行为的变化来探索科学的发展，例如新兴的科学范式和先进的科学。作为所用方法的说明，跟踪了液晶显示器（LCD）和等离子显示面板（PDP）的开发。由于两组之间研究强度的差异，我们在两种技术的科学发展初期都发现了两级幂律分布。直到2000年代中期，逐渐发展起来的关键词组比其他关键词更可能吸引研究人员的兴趣，以取代之前的那些。最后，我们可以捕获PDP二分结构的合并点，但LCD在整个调整区域都保持结构分离。我们期望对关键字共现网络的这种结构研究为诊断该领域的研究进展提供一个指标。 （C）2016由Elsevier B.V.发布

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