This paper used foot arch index to investigate the growth of the foot arch of infants, children and juveniles.

本文采用较能客观反映真实足弓的指标——足弓指数，对幼儿、儿童和少年足弓发育情况进行研究。

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Then, we use the ARCH model to analyze the market price index and find that the ARIMA model is better than the ARCH model.

然后运用ARCH模型进行分析，经过比较发现在对我国物价指数的分析上，ARIMA模型的效果要好于ARCH模型。

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This paper simulates the volatility of Shanghai stock index by ARCH Models and the result shows that GARCH (1, 1) model is effective in the simulation of the volatility of Shanghai stock index.

利用ARCH类模型对上证指数的波动进行了拟合，结果表明GARCH（1，1）模型对上证指数波动具有较好的拟合效果。

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In this paper we introduce the characteristic of ARCH model and its extended models, and by using these models we analyze a share index yields in Shanghai stock exchange.

本文介绍了ARCH模型及其扩展模型的特点，并利用这些模型对上证a指股市收益进行实证分析。

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At last, it researches the frequence data by using arch models to review the fluctuation status of stock index and stocks in a day.

最后，利用ARCH族模型对高频数据进行研究，以考察股指和个股在日内的波动情况。

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At last, it researches the frequence data by using arch models to review the fluctuation status of stock index and stocks in a day.

最后，利用ARCH族模型对高频数据进行研究，以考察股指和个股在日内的波动情况。

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