关键词: 行业和职业编码, 人口普查, 信息技术, 文本检索, 机器学习

Abstract: Industry and occupation coding is the necessary stage between data collection and quantitative analysis in the population census. With the rapid development of information technology and its wide application in social management, the industry and occupation coding in the census is developing towards intelligence. The application of automated coding significantly reduces the human input, coding time and costs, and especially the reproducibility error. Combined with relevant domestic and foreign research, this paper summarizes two basic methods of automated coding, and expounds the principles and techniques of dictionary coding method and model coding method with their application in the census coding. In the first six population censuses of China, industry and occupation coding was all completed manually, till the seventh census which initially applied automated and intelligent coding. In the future, it is beneficiary to draw on the advanced experience of social survey coding in other countries in a targeted manner, move forward in the direction of comprehensive intelligence, and further improve the service level of automated coding in the precise management of China’s society.

Key words: Industry and Occupation Coding, Population Census, Information Technology, Text Retrieval, Machine Learning