Based on the previous data, the sale tendency of our jewelry market in China is studied by using index smooth method, and the appraisal to the forecast result is also carried on.
运用指数平滑法对我国珠宝首饰市场在未来一定时期的销售趋势进行预测，并对预测结果进行评估、修正，从而透析我国珠宝首饰市场发展前景，为相关部门提供参考。
Shanghai Composite Index is an important index for Chinese stock market, and we apply the Least Squares Method with roughness penalty to smooth its historical data, using spline functions.
上证综合指数是股票市场的一个重要指标，我们采用样条函数，将带光滑参数的最小二乘法应用于拟合该指标的历年数据。
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