Research On User Demand Model Based On NSCC In Digital Library

As an important form of library, digital library has a wide range of influence on knowledge exchange and communication. However, with the expansion of knowledge resources and the development of personalized knowledge service, the sameness of digital library retrieval results and the popularity of recommend results both cannot meet the actual demand of users,which leads to more users use network tools rather than digital libraries. Therefore, some researchers tend to studied the user problem, but, most of them are only researching the user interest,which cannot track the change of user demand and also lack of the deep understanding of user demand. So, based on the existing research results, this paper tries to analyze the method of user demand identification, helping the digital library make better user researches and provide better knowledge services.At first, this paper introduces the related knowledge of user demand. Next, this paper make a deep analysis on digital library user behavior, find out the influencing factors of user demand,and put forward a user demand model based on NSCC in digital library. Then, this paper identifies user demand according to the user demand model based on NSCC in digital library: exploring the user cognitive structure based on the Spreading Activation Model of cognitive psychology; exploring the user context information from the aspects of the natural context and social context; constructing user demand model by four tuples combined with the user information of cognitive structure and context; and identifying the real user demand. At last, this paper conducts the contrast experiments, one of them is a simulation experiment according to the user demand model based on NSCC in digital library, and another one is a psychological experiment based on Word Association Test. The experiment result shows that it has higher feasibility and correct rate.The research on user demand model based on NSCC in digital library conveys the real user demand to digital libraries, which may not only help them improve the framework of the knowledge service from the view of users, but also make digital library users acquire accurate services. Additionally, the three dimensions of the user demand research for user cognitive structure, natural context and social context, extending the research ideas to the area of cognitive psychology, sociology and computer science. Thus,the research has great theoretical and practical significance for the study of user problem.