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Scientific and technical literature importance degree evaluation method based on PageRank and time decay

An evaluation method and time-attenuation technology, applied in special data processing applications, instruments, network data retrieval, etc., can solve problems that do not take into account the influence of the age of scientific and technological literature, the differences of different citations, and the impact factors of journals Impact and other issues

Inactive Publication Date: 2016-07-06
BEIJING UNIV OF TECH
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Problems solved by technology

This evaluation method has obvious shortcomings: it does not take into account the differences between different citations; it does not take into account the influence of the age of scientific literature; it does not take into account the influence of journal impact factors; it does not take into account the influence of author authority

Method used

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  • Scientific and technical literature importance degree evaluation method based on PageRank and time decay
  • Scientific and technical literature importance degree evaluation method based on PageRank and time decay
  • Scientific and technical literature importance degree evaluation method based on PageRank and time decay

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Embodiment Construction

[0040] The present invention is explained and elaborated below in conjunction with relevant accompanying drawings:

[0041] The flow chart of an evaluation algorithm for the importance of scientific and technological literature based on PageRank and time decay is attached Figure 4 Shown, it is characterized in that comprising the following steps:

[0042] Step 1: Collect scientific and technological literature datasets, including conference / journal information, publication year information, scientific and technological literature information, and author information.

[0043] Step 2: Construct conference / journal-published year, published year-scientific literature, scientific literature-scientific literature, scientific literature-author adjacency relationship.

[0044] Step 3: Define the link network structure of scientific and technological literature based on PageRank and time decay.

[0045] Step 4: Repeatedly execute the data reading method, read out the basic node info...

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Abstract

The invention discloses a scientific and technical literature importance degree evaluation method based on PageRank and time decay. Impact factors including a referenced scientific and technical literature, an author, a presentation meeting / periodical and the like jointly construct a link network of the scientific and technical literature, wherein the impact factors are associated with the scientific and technical literature. The scientific and technical literature importance degree evaluation method has the basic thought that a relational network, which is associated with the scientific and technical literature, of a meeting / periodical-presentation year, presentation year-scientific and technical literature, scientific and technical literature-scientific and technical literature and scientific and technical literature-author is converted into a directed graph; then, the PageRank value of each node is calculated on the basis of the directed graph, the scientific and technical literature and a scientific and technical literature reference link are subjected to timed decay processing, wherein ''reference'' time and an authority score are in an inverse ratio; and finally, according to the obtained authority score, weighting processing is carried out to carry out authority value sorting on the scientific and technical literature so as to improve accuracy and reliability for calculating the authority value of the scientific and technical literature. When a user retrieves a target scientific and technical literature, the user can quickly find the most authoritative scientific and technical literature under a situation that an amount of search results is large.

Description

technical field [0001] The invention belongs to the field of data mining, and relates to a method for evaluating the importance of scientific and technological documents based on PageRank and time decay. Background technique [0002] With the rapid development of digital information resources, a large number of digital resources continue to emerge. As the carrier of scientific research achievements, scientific and technological documents (scientific papers) are important learning and reference materials for researchers. The scientific and technological document retrieval system is a commonly used document retrieval tool for scientific researchers. However, in the face of massive scientific and technological document resources, it becomes more difficult for users to obtain comprehensive and satisfactory scientific and technological documents. In order to provide users with the satisfaction of scientific and technological document retrieval, it is a very important issue to dis...

Claims

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Application Information

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IPC IPC(8): G06F17/30
CPCG06F16/2465G06F16/951
Inventor 李玉鑑张甫
Owner BEIJING UNIV OF TECH
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