Ni 3 [Fe(CN) 6 ] 2 nano-cubic precursors were prepared by chemical coprecipitation at room temperature with nickel acetate and potassium ferricyanide as raw materials. The corresponding NiFe 2 O 4 -NiO@C composites with excellent crystallization were prepared by two-stage oxidation at low temperature. The microstructure and electrochemical behavior of the materials showed that the Prussian blue analog was transformed into metal oxide while the carbon coating was maintained in the twostage oxidation at low temperature. The existence of the carbon coating reduces the charge transfer impedance to 31.5 Ω. At the current density of 500 mA/g, the reversible capacity of 632.7 mAh/g is maintained after 500 cycles. At the same time, carbon cladding can also enhance the role of pseudocapacitance in the material. At the scanning rate of 0.1 mV/s, the pseudocapacitance account for 54.4% of the total discharge capacity, which is significantly higher than that of uncoated materials.
Pandemic and the issued education-related have brought an enormous challenge to the education industry. This research aims to analyze how New Oriental, one of the leading education corporations in China, has adopted novel digital strategies and how these strategies generated success in the post-pandemic era. This research first introduces Chinas digital marketing trend and the New Oriental company. Then, the case study explicitly analyzes New Orientals marketing strategies under pandemics and the double-reduction policy and how their strategy gained substantial success. The research also proposes four recommendations from New Orientals success for other companies to take as a reference to develop marketing strategies in the post-pandemic era.
As an investment product, the analysis of the historical net value of the fund is of great significance to the prediction of the fund. In this paper, the H-P filtering method, OLS regression analysis, and Tobit model are applied to analyze the historical net value, establish the model, and forecast. The results show that :(1) The risk level is positively correlated with the long-term trend fluctuation of the fund. (2) There are differences in the absolute and relative values of the long-term trend of funds with the same risk grade. The impact of the days change on the long-term trend may vary from individual to individual. (3) The selected fund industry allocation is mainly in the manufacturing industry, reflecting the steady and good development of China's manufacturing industry.
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