50 citations · 256 across the 33 of their papers we have counts for
9 papers · 1 filter
Theory and data analysis of player and team ball possession time in football
Ken Yamamoto, Seiya Uezu, Keiichiro Kagawa +2
In this study, the stochastic properties of player and team ball possession times in professional football matches are examined. Data analysis shows that player possession time fol…
Validation of a motion model for soccer players' sprint by means of tracking data
Takuma Narizuka, Kenta Takizawa, Yoshihiro Yamazaki
In soccer game analysis, the widespread availability of play-by-play and tracking data has made it possible to test mathematical models that have been discussed mainly theoreticall…
Space evaluation in football games via field weighting based on tracking data
Takuma Narizuka, Yoshihiro Yamazaki, Kenta Takizawa
In football game analysis, space evaluation is an important issue because it is directly related to the quality of ball passing or player formations. Previous studies have primaril…
Lifetime distributions for adjacency relationships in a Vicsek model
Takuma Narizuka, Yoshihiro Yamazaki
We investigate the statistical properties of adjacency relationships in a two-dimensional Vicsek model. We define adjacent edges for all particles at every time step by (a) Delauna…
Clustering algorithm for formations in football games
Takuma Narizuka, Yoshihiro Yamazaki
This paper develops a clustering algorithm for formations in team sports, with a focus on football games. Our method first clusters formations into several average formations: `442…
Characterization of the formation structure in team sports
Takuma Narizuka, Yoshihiro Yamazaki
We propose a method to identify the formation structure in team sports based on Delaunay triangulation. The adjacency matrix obtained from the Delaunay triangulation for each playe…
Statistical properties for directional alignment and chasing of players in football games
Takuma Narizuka, Yoshihiro Yamazaki
Focusing on motion of two interacting players in football games, two velocity vectors for the pair of one player and the nearest opponent player exhibit strong alignment. Especiall…
Degree distribution of position-dependent ball-passing networks in football games
Takuma Narizuka, Ken Yamamoto, Yoshihiro Yamazaki
We propose a simple stochastic model describing the position-dependent ball-passing network in football games. In this network, a player on a certain area in the divided fields is…
Structure and modeling of the network of two-Chinese-character compound words in the Japanese language
Ken Yamamoto, Yoshihiro Yamazaki
This paper proposes a numerical model of the network of two-Chinese-character compound words (two-character network, for short). In this network, a Chinese character is a node and…