Search

This paper proposes a new measure for recommendation through integrating Triangle and Jaccard similarities. The Triangle similarity considers both the length and the angle of rating vectors between them, while the Jaccard similarity considers non co-rating users. We compare the new similarity measure with eight state-of-the-art ones on four popular datasets under the leave-one-out scenario. Results show that the new measure outperforms all the counterparts in terms of the mean absolute error and the root mean square error.

We determined the complete chloroplast genome sequence of Sedum lushanense S. S. Lai 2004. The genome was 148,691 bp in length, including a large single copy (LSC; 80,497 bp), a small single copy (SSC; 16,620 bp), and two inverted repeats (IR; 25,787 bp) regions. It contained 84 coding gene sequences (CDS), 34 transfer RNA (tRNA) genes, and eight ribosomal RNA (rRNA) genes. A maximum likelihood phylogenetic analysis revealed a close relationship between S. lushanense and S. lineare. Therefore, our study provided new genetic information on S. lushanense, contributing to a better understanding of its relationship with other related species and the evolutionary history of Crassulaceae.