A Visualization Method of Topic Evolution Based on Circuit Diagram Element Metaphor
A circuit diagram and theme technology, which is applied in the field of theme evolution visualization based on circuit diagram element metaphor, can solve the problems of unclear expression of words constituting the theme, unclear expression of low-intensity theme, and lack of performance, so as to solve the problem of unclear intensity expression. Effect
Active Publication Date: 2019-08-06
HARBIN ENG UNIV
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[0003] Existing visualization methods for theme evolution mainly use Stacked Chart, Alluvial Diagram and other visualization methods such as Themeriver, TestFlow, NEViewer, etc., which are characterized by being able to show the evolution process of the theme over time and the evolution relationship of the theme. However, it can only show the relative intensity of the theme; the stacked graph emphasizes the evolution process of the theme, and uses continuous graphics to express discrete quantities, which is easy to cause misunderstandings; in addition, the above-mentioned methods are not clear enough for the situation where the number of themes is large and the connection is complicated, especially for small-intensity themes. Problems where small-intensity topics are easily covered, and the words that make up the topic are unclear or unrepresented
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[0018] The present invention will be further described below in conjunction with the accompanying drawings.
[0019] A visualization method for theme evolution based on circuit diagram element metaphor, its implementation includes the following steps:
[0020] Step 1, data preprocessing, to preprocess the text data, first perform operations such as word segmentation and stop word removal, and process the text collection into a lexicon; then use algorithms such as LDA to process the text collection, extract topics, and record and Information such as words, texts, and time and place corresponding to the topic;
[0021] Step 2, use pad icon as a metaphor for the words in the topic, which can be called "word plate" here, and the word plate is represented by a hollow pie chart, as shown in figure 2 As shown in the middle mark 1, it can indicate the geographical distribution ratio of the term in this time period, such as image 3 shown.
[0022] Step 3, the word disks under the ...
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The invention belongs to the field of data visualization analysis and particularly relates to a circuit diagram element metaphor based topic evolution visualization method. The top evolution visualization method includes: data preprocessing, namely preprocessing text data, performing word segment and stopword operation and processing a text set into a word bank; processing the text set by adopting an LDA algorithm, extracting a topic, and recording words, texts and time and location information corresponding to the topic; performing metaphor on the word, namely a word pad, through a pad icon, wherein the word pad is expressed by adopting a hollow pie chart form, and geographic distribution proportion that the word is located in within the time period is expressed. The content of the topic, change of strength of the topic with the time and evolution relationship among the topics can be mainly displayed, so that convenience is given to users to perform analysis on evolution process of the topics, and geographical distribution of the strength of the same topic within different time periods can be displayed.
Description
technical field [0001] The invention belongs to the field of data visualization analysis, and in particular relates to a theme evolution visualization method based on circuit diagram element metaphors. Background technique [0002] Topic evolution refers to the change process of topics over time. It is a research hotspot today and can be widely used in text mining, public opinion analysis, scientific research hotspot analysis and other fields. Its main task is to apply the topic evolution algorithm to discover the trend of topic changes in document collections. The results of topic evolution research are mostly expressed in mathematical forms such as probability, which is difficult to understand, especially the deepening relationship between topics is not easy to be discovered. Therefore, a visual analysis method is needed to display and help analyze the topic evolution process. [0003] Existing visualization methods for theme evolution mainly use Stacked Chart, Alluvial ...
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IPC IPC(8): G06F17/50
CPCG06F30/398
Inventor 周连科王红滨王念滨杜一何鸣宋奎勇王瑛琦
Owner HARBIN ENG UNIV