diff --git a/recommender.tex b/recommender.tex index 4e1e933da09933aed0a3ae667c29620fdadb9125..36946e20d37e355bf9fd2ffbd1ab79f2200fa496 100644 --- a/recommender.tex +++ b/recommender.tex @@ -42,7 +42,7 @@ Here $\mu_u$ denotes the \textit{average} of all \textit{assigned ratings} of th Thus $b_u$ indicates the \textit{deviation} of the \textit{average assigned rating} of a \textit{user} from the \textit{global average}. Similarly, $b_i$ indicates the \textit{deviation} of the \textit{average rating} of an item from the \textit{global average}. In addition, the \textit{minimization problem} can be extended by the \textit{bias}. Accordingly, the \textit{minimization problem} is then $\min_{p_u, q_i}{\sum_{(u,i) \in \mathcal{B}} (r_{ui} - \hat{r}_{ui})^{2}} + \lambda(\lVert q_i \rVert^2 + \lVert p_u \lVert^2 + b_u^2 + b_i^2)$. Analogous to the \textit{regulated matrix-factorization}, the values $b_u$ and $b_i$ are penalized in addition to $\lVert q_i \rVert, \lVert p_u \rVert$. In this case $b_u, b_i$ are penalized more if they assume a large value and thus deviate strongly from the \textit{global average}. -\subsection{Advanced Matrix-Factorization} +\subsubsection{Advanced Matrix-Factorization} This section is intended to show that there are \textit{other approaches} to \textit{matrix-factorization}. Thus, \textit{implicit data} can also be included. First of all, it should be mentioned that \textit{temporary dynamics} can also be included. diff --git a/submission.pdf b/submission.pdf index 81b080d59625d2f5f6108bd185d0ba094e2df2d6..4255cb7c64b34e284853306b1928a10b18358a61 100644 Binary files a/submission.pdf and b/submission.pdf differ