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Disguised Missing Data Detecting Research in the Education Administration Field

Author: WuDingHui
Tutor: YangXiaoHua
School: Nanhua University
Course: Applied Computer Technology
Keywords: Data cleaning Pseudo - missing values ??detected Educational administration
CLC: TP399-C1
Type: Master's thesis
Year: 2010
Downloads: 26
Quote: 0
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Abstract


With the increasing degree of social information, a large number of information systems are widely used in different fields, have accumulated huge amounts of data. In order to make information systems can effectively and reliably support the work of the organization, required system data must accurately reflect the true state of the real world. Widespread in the actual operation of the system, the duplication of data, missing data, data inconsistencies, data quality (Information Quality) issues become increasingly prominent, causing the academia and the business community attaches great importance to. For higher education information technology, in-depth discussion and research for Credit Education Management Information System data quality issues, a careful analysis of the various functional modules of the system data quality problems, and to solve the school management module The pseudo-missing values ??with a focus on. This paper introduces the problem of pseudo-missing values ??exist in the database, the definition of pseudo-missing values ??as well as common pseudo-missing values ??detection methods, such as: statistical methods (based on the method of distribution and depth-based method), based on the distance method, the method based on density-based clustering method, deviation-based approach. Pseudo-missing values ??record is that the user does not fill an information system uses attribute values ??within a legal value default populate the database with the actual matching records, the existence of a large number of such records to the data analysis and statistics (hypothetical results of the test, correlation analysis and regression analysis, etc.) bring a serious error, the existing method of detection in the case of pseudo-missing values ??are heavily used are not always effective, in order to effectively detect the Academic Management System pseudo missing values ??recorded this paper, unbiased sample with the distribution of the principle and practice of educational management system application requirements, proposed a simplified version based on a single attribute with the distribution of the principle of pseudo-missing values ??detection algorithm, and apply the Educational Management Information System the student information data on the effectiveness and feasibility of the algorithm is verified by experiments. Finally, a careful analysis of the business processes of the generation mechanism of pseudo-missing values ??and educational management information system under the premise, from the perspective of the development of object-oriented programming, pseudo-missing values ??detection module design, determine the detection operation of the user interface, business logic layer draw. design documents, including: flow charts, timing diagram, class diagram, a detailed analysis and determine the function of the data access layer of the stored procedure. Completed the basic design of the pseudo-missing values ??detection module integrated with the existing management information systems of the Senate.

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