Main observation and conclusion
Natural biopolymer‐based hydrogels have been extensively studied in recent years due to their excellent biocompatibility. However, the preparation of multi‐functional and tough natural biopolymer‐based hydrogels is still a challenging problem. Herein, a natural biopolymer‐based hydrogel is prepared using gelatin and carboxymethyl chitosan (CMCS) through a one‐step soaking method. The prepared hydrogel without any synthetic polymers and crosslinking agents has a fully physical crosslinking structure. Due to the hydrophobic interaction brought by the Hofmeister effect, the mechanical properties of soaked hydrogels (tensile stress and strain can reach 3.77 MPa and 1082%) are superior to conventional protein hydrogels. In addition, the prepared gelatin/carboxymethyl chitosan (Gel/CMCS) hydrogels exhibit a variety of appealing properties, including good shape memory, fatigue resistance, electrical conductivity, water retention, drug releasing, antibacterial property, and recyclability. This strategy opens up a new horizon to fabricate hydrogels with excellent mechanical properties and multiple functions, which can extend their applications in the biomedicine area and other related fields.
Reconfiguration is to reconfigure the topological structure of distribution networks optimally. The artificial intelligence optimization algorithms are effective in solving reconfiguration problems. The coding scheme, as the base of AI algorithm application, is to represent the solution schemes by serials of numbers. The efficiency of coding scheme affects the quality and speed of optimization. A loop-based coding scheme is proposed and compared with the binary and decimal coding schemes. The reactive tabu search algorithm is employed to get the optimal solution. The efficiency of the proposed coding scheme is proved by simulation results on 69-node system.
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