This paper presents a novel binary monarch butterfly optimization (BMBO) method, intended for addressing the 0-1 knapsack problem (0-1 KP). Two tuples, consisting of real-valued vectors and binary vectors, are used to represent the monarch butterfly individuals in BMBO. Real-valued vectors constitute the search space, whereas binary vectors form the solution space. In other words, monarch butterfly optimization works directly on real-valued vectors, while solutions are represented by binary vectors. Three kinds of individual allocation schemes are tested in order to achieve better performance. Toward revising the infeasible solutions and optimizing the feasible ones, a novel repair operator, based on greedy strategy, is employed. Comprehensive numerical experimentations on three types of 0-1 KP instances are carried out. The comparative study of the BMBO with four state-of-the-art classical algorithms clearly points toward the superiority of the former in terms of search accuracy, convergent capability and stability in solving the 0-1 KP, especially for the high-dimensional instances.
Bacterial
cellulose (BC) holds several unique properties such as
high water retention capability, flexibility, biocompatibility, and
high absorption capacity. All these features make it a potential material
for wound healing applications. However, it lacks antibacterial properties,
which hampers its applications for infectious wound healings. This
study reported BC-based dressings containing ε-polylysine (ε-PL),
cross-linked by a biocompatible and mussel-inspired polydopamine (PDA)
for promoting infectious wound healing. BC membranes were coated with
PDA by a simple self-polymerization process, followed by treating
with different contents of ε-PL. The resulted membranes showed
strong antibacterial properties against tested bacteria by both in
vitro and in vivo evaluations. The membranes also exhibited hemocompatibility
and cytocompatibility by in vitro investigations. Moreover, the functionalized
membranes promoted infected wound healing using Sprague–Dawley
rats as a model animal. A complete wound healing was observed in the
group treated with functionalized membranes, while wounds were still
open for control and pure BC groups in the same duration. Histological
investigations indicated that the thickness of newborn skin was greater
and smoother in the groups treated with modified membranes in comparison
to neat BC or control groups. These results revealed that the functionalized
membranes have great potential as a dressing material for infected
wounds in future clinical applications.
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