钢铁工业的发展态势直接影响国民经济的运行,同时钢铁工业对宏观经济周期波动的反映也相当灵敏。在经济扩张期,钢铁工业的生产、价格及销售会迅速上升,而经济处于衰退阶段,这些活动均会随之下降。因此,对钢铁工业的运行状态进行监测、预测,具有十分重要的现实意义。在国际上,国 The development trend of the iron and steel industry directly affects the operation of the national economy. At the same time, the response of the steel industry to the fluctuations of the macroeconomic cycle is also quite sensitive. During the economic expansion, the production, prices and sales of the steel industry will rise rapidly. As the economy is in recession, these activities will decrease. Therefore, monitoring and predicting the operating status of the steel industry is of great practical significance. In the international arena