Zhang Yi-Cheng - Search Results

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Heat conduction process on community networks as a recommendation model

Zhang, Yi-Cheng ; Blattner, Marcel ; Yu, Yi-Kuo

In: Physical Review Letters, 2007, vol. 99, no. 15, p. 154301

Using heat conduction mechanism on a social network we develop a systematic method to predict missing values as recommendations. This method can treat very large matrices that are typical of internet communities. In particular, with an innovative, exact formulation that accommodates arbitrary boundary condition, our method is easy to use in real applications. The performance is assessed by...

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Exploring an opinion network for taste prediction: an empirical study

Blattner, Marcel ; Zhang, Yi-Cheng ; Maslov, Sergei

In: Physica A: Statistical and Theoretical Physics, 2007, vol. 373, no. 1, p. 753-758

We develop a simple statistical method to find affinity relations in a large opinion network which is represented by a very sparse matrix. These relations allow us to predict missing matrix elements. We test our method on the Eachmovie data of thousands of movies and viewers. We found that significant prediction precision can be achieved and it is rather stable. There is an intrinsic limit to...

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