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The energy storage system is a complex energy system that changes with time. Multiple indicators are required to describe its performance, and different application scenarios have different requirements for the energy storage system. To solve the above problems, a cloud model-based method for evaluating the adaptability of electrochemical energy storage conditions is proposed. In the application scenario of energy storage participating in power grid peak and frequency regulation, comprehensive evaluation indicator domain and standard domain for energy storage system suitable for power grid peak regulation and frequency regulation are established firstly. Then, the entropy weight method is used to calculate weight matrix of energy storage system evaluation indicators. The forward cloud generator is used to calculate the membership matrix of the decision-making indicators of the energy storage system to be evaluated. Finally, the comprehensive score of the adaptability of the energy storage system to be evaluated is calculated according to the fuzzy subset on the comprehensive evaluation standard domain of the energy storage system, and the one with the highest score is selected as the best energy storage system for this application scenario. The working condition adaptability of five electrochemical energy storage systems is simulated and analyzed. The results show that the lithium iron phosphate battery has the highest score. The lithium iron phosphate battery has the best working condition adaptability in the peak and frequency regulation scenario, which is consistent with the actual engineering.

Interaction between light and magnetism in magneto-optical (MO) nanophotonic devices has been actively studied in the past few years. The recent development of MO all-dielectric resonators and metasurfaces has led to the emergence of various novel MO phenomena that were not observed in their bulk counterparts. For example, a large s-polarized transverse MO Kerr effect can be observed at magnetic resonance wavelength, which cannot exist in the bare MO films. We review recent developments in nanophotonic devices based on MO materials and focus on different modes and related MO effects in nanophotonic structures with emphasis on recently discovered new MO phenomena in magnetoplasmonics and all-dielectric nanostructures, such as dark mode, all-dielectric Mie resonance and waveguide mode. Further, we discuss the potential applications of these nanostructures for biological/chemical sensing, magnetic field sensing, and magnetic field-controlled active and nonreciprocal metasurfaces.

This article explores the presence of falconry in the Old English poem "The Battle of Maldon" and the Middle High German work "Kudrun." It discusses the different interpretations of the motif, including its connection to noble lineage, bravery, and disdain for invaders. The comparison with "Kudrun" helps to clarify scholarly debates and presents a more positive view of the young warrior in "The Battle of Maldon." Additionally, the article provides evidence from various sources to support the existence of falconry in early medieval England, highlighting its association with royalty and nobility. It suggests that falconry may have played a significant social role during this time. [Extracted from the article]

Biobased hydrogels have been widely used in drug delivery, tissue engineering and biosensors due to their abundance, non-toxicity and biocompatibility. However, constructing fully biobased hydrogels with good mechanical performance still remains a challenge. Herein, a double network (DN) hydrogel consisting of oxidized hydroxypropyl guar gum (OHPG) and gelatin (Gel) was fabricated via Schiff base reaction. The Gel-OHPG hydrogel had an elongation at break of 497%, a tensile stress of 0.44 MPa and a compressive stress of 25.91 MPa. Then, the mechanical properties of the hydrogel were further enhanced through immersing it in an ammonium sulfate (AMS) solution due to the Hofmeister effect. Its elongation could reach 629% and the corresponding tensile toughness and compressive stress were 3.86 MPa and 59.55 MPa, respectively. The conductivity of the hydrogel was 0.86 S m−1. Furthermore, the Gel-OHPG hydrogel was fabricated as a flexible sensor, and it could accurately monitor human joint motions such as fingers, wrists, knees, elbows, throat and neck. Henceforth, the Gel-OHPG hydrogel prepared using fully natural polymers has promising potential in flexible sensors and tissue engineering. [ABSTRACT FROM AUTHOR]