Title |
A network-based dynamical ranking system for competitive sports
|
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Published in |
Scientific Reports, December 2012
|
DOI | 10.1038/srep00904 |
Pubmed ID | |
Authors |
Shun Motegi, Naoki Masuda |
Abstract |
From the viewpoint of networks, a ranking system for players or teams in sports is equivalent to a centrality measure for sports networks, whereby a directed link represents the result of a single game. Previously proposed network-based ranking systems are derived from static networks, i.e., aggregation of the results of games over time. However, the score of a player (or team) fluctuates over time. Defeating a renowned player in the peak performance is intuitively more rewarding than defeating the same player in other periods. To account for this factor, we propose a dynamic variant of such a network-based ranking system and apply it to professional men's tennis data. We derive a set of linear online update equations for the score of each player. The proposed ranking system predicts the outcome of the future games with a higher accuracy than the static counterparts. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
Japan | 2 | 13% |
Indonesia | 1 | 6% |
United Kingdom | 1 | 6% |
India | 1 | 6% |
Unknown | 11 | 69% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 14 | 88% |
Scientists | 2 | 13% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Japan | 1 | 1% |
United States | 1 | 1% |
Italy | 1 | 1% |
Switzerland | 1 | 1% |
Unknown | 65 | 94% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 17 | 25% |
Student > Master | 12 | 17% |
Student > Bachelor | 8 | 12% |
Researcher | 6 | 9% |
Professor > Associate Professor | 5 | 7% |
Other | 13 | 19% |
Unknown | 8 | 12% |
Readers by discipline | Count | As % |
---|---|---|
Computer Science | 13 | 19% |
Physics and Astronomy | 9 | 13% |
Mathematics | 8 | 12% |
Agricultural and Biological Sciences | 5 | 7% |
Sports and Recreations | 5 | 7% |
Other | 16 | 23% |
Unknown | 13 | 19% |