Skillet (band) during September and October 2016. In December 2016, a 27-city, second leg of the tour was announced. Opening for Skillet on this second leg were Sick Puppies and Devour the Day. In 2017, Skillet opened for Korn and Stone Sour on the second half of The Serenity of Summer Tour which started in Syracuse, New York on July 19 and finished in Cleveland, Ohio August 2. Starting November 5, 2017, Skillet joined Britt Nicole, Colton Dixon, Tauren Wells, and Gawvi for five shows on the Air1 Hits Tour across the central United States. In 2018, Skillet headlined the Winter Jam
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