The application of composite materials that combine the advantages of carbonaceous material and metal alloy proves to be a valid method for improving the performance of lithium−sulfur batteries (LSBs). Herein iron−cobalt−nickel (FeCoNi) ternary alloy nanoparticles (FNC) that spread on nitrogen-doped carbon (NC) are obtained by a strategy of lowtemperature sol−gel followed by annealing at 800 °C under an argon/hydrogen atmosphere. Benefiting from the synergistic effect of different components of FNC and the conductive network provided by the NC, not only can the "shuttle effect" of lithium polysulfides (LiPS) be suppressed, but also the conversion of LiPS, the diffusion of Li + , and the deposition of Li 2 S can be accelerated. Taking advantage of those merits, the batteries assembled with an FNC@NC-modified polypropylene (PP) separator (FNC@NC//PP) can deliver a high reversible specific capacity of 1325 mAh g −1 at 0.2 C and maintain 950 mAh g −1 after 200 cycles, and they can also achieve a low capacity fading rate of 0.06% per cycle over 500 cycles at 1 C. More impressively, even under harsh test conditions (the ratio of electrolyte to sulfur (E/S) = 6 μL mg −1 and sulfur loading = 4.7 mg cm −2 and E/S = 10 μL mg −1 and sulfur loading = 5.9 mg cm −2 ), the area capacity of batteries is still much higher than 4 mAh cm −2 .
The passenger boot system of the subway station is an important part of the subway station and is an important measure in the quality assurance of subway station. Modern subway stations often choose construction in urban underground, and the space environment is more complicated, and there is a decline in the spatial direction of the underground, and passengers can be lost in the station. Therefore, how to conduct scientific and effective optimization upgrades to the pedestrian boot system of the subway station, and enhance passengers' travel efficiency in the subway station.This paper is based on the VRP(Virtual Reality Platform) virtual reality platform, using software such as 3DSMAX, Photoshop, VRP-Builder, and simulates passengers from the process of entering the station. To achieve the ride process visualization, the passengers can easily and easily understand the ride process, improve travel efficiency, which is convenient for life. It also enables the subway staff to understand the passengers to the subway station's ride process, which is convenient for follow-up to optimize upgrade, and enhance the quality of the subway station.
Aiming at the problems of location and time limitations arising from the field visits in life, and then taking Changchun Institute of Technology as an example, a virtual campus roaming system based on Unity3D was developed to solve the problem of poor environmental simulation of traditional inspection methods. The system can improve the visual tension and expressiveness of users visiting the campus online, so that we can facilitate school publicity and promotion. First of all, the system uses 3DMax to accurately model the campus site, and then uses Unity to design and implement the functions, so that the system has the characteristics of high presence and strong interaction, thereby improving the user experience.
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