On Goodness of Fit of Time Series Models: An Application of Higher Order Crossings
时间序列模型的拟合优度:高阶穿越的应用AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接研究平稳时间序列模型的拟合优度,并明确使用 ARMA 模拟序列,属于时间序列方法。
时间序列模型的拟合优度:高阶穿越的应用AI 解读 ↓
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A relation between the graphical appearance of a stationary time series and its autocorrelations is discussed. The use of counts of visual features termed higher order crossings is proposed in testing goodness of fit of hypothesized models against very general alternatives. Attention is focused on a specific example of a new type of nonparametric test statistic arising from iterative feature extraction procedures called extractors. The statistic is compared with Box & Pierce's portmanteau Q statistic on real data as well as on simulated normal autoregressive-moving average series.