【摘要】 运输经济周期波动是运输经济发展过程中的必然现象,而对运输经济周期波长的测定是对运输经济周期波动进一步分析研究的基础。运输经济周期波动的谱分析方法能衡量运输指标时间序列中各个周期因素的相对重要程度,从而确定时间序列中各个不同周期的长度。运输指标的谱分析结果表明,运输业存在着7年左右的主要周期。此外,还存在一个作用相对较弱的3年左右的次周期波动。更多还原

【Abstract】 The transportation economy cycle fluctuation is the inevitable phenomenon during the transportation developing process.The measurement of the transportation economy cycle wavelength is the base point for more study.The spectral analysis of transportation economy cycle fluctuation can compare with the importance of different wavelength fluctuation and calculate the wavelength of the transportation economy cycle fluctuation.The results of spectral analysis of transportation economy cycle fluctuation show that the transportation has a main medium-period, and the period length is about 7 years;but it is still has a subaltern short-period,and the period length is about 3 years.更多还原