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Time series modelling has long been used to make forecast in different industries with a variety of statistical models currently available. Methods for analyzing changing patterns of stock prices have always been based on fixed time series. Considering that these methods have ignored some crucial factors in stock prices, we use ARIMA model to predict stock prices given the stock-trading volume and...
This paper describes the high-frequency circuit simulation of in X-band coupled-cavity TWT. With the help of the three-dimensional electromagnetic simulation with the slow-wave structure, energy transition structure and three-dimensional beam-wave interaction are researched and developed by CST software, so that the tube operating frequency and efficiency have been improved, and the design requirements...
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