Puzzle-based storage (PBS) is an emerging compact storage system in which items are scheduled in a similar way to a puzzle game. Under the single-load movement assumption, some existing exact and heuristic algorithms have enabled the minimum number of moves for the single-item retrieval problem...

Comparative studies investigating how species differ in their utilization of dietary resources, that is, the trophic niche differentiation, is one of the prerequisites for species coexistence. Fatty acid (FA) analysis of consumer tissues has recently shown utility in drawing further inferences...

Purpose: The development level and quality of education depend on the merits and efficiency in the use of teaching resources, especially in the case of obvious contradiction between the demand and supply of teaching resources. So to integrate teaching resources, improve the efficiency in the use...