German grammar with the natural gender of what is described. However, since the diminutive forms ending in "-chen" or "-lein" are grammatically neuter, there exist several notable counterexamples such as "das Mädchen" ("girl") and "das Fräulein" ("miss"). Thus these are not illogical, whereas "das Weib" (old, regional or anthropological: woman; a cognate of the English "wife") is really an exception. Furthermore, in German, the gender of nouns without natural gender is not predictable. For example, the three common pieces of cutlery all have different genders: "das Messer" ("knife") is neuter, "die Gabel" ("fork") is feminine, and "der Löffel" ("spoon") is masculine. Students
Item-item collaborative filtering is analogous to "people who rate item X highly, like you, also tend to rate item Y highly, and you haven't rated item Y yet, so you should try it". Item-item collaborative filtering had less error than user-user collaborative filtering. In addition, its less-dynamic model was computed less often and stored in a smaller matrix, so item-item system performance was better than user-user systems. Slope One is a family of item-item collaborative filtering algorithms designed to reduce model overfitting problems. Item-item collaborative filtering Item-item collaborative filtering, or item-based, or item-to-item, is a form of collaborative filtering for recommender systems based