正交级数方法与非平稳时间序列模型估计和检验的一些研究进展
董朝华, 高集体, 朱平芳

Recent Developments on Nonstationary Time Series Model Estimation and Testing Driven by Orthogonal Series Method
Chaohua DONG, Jiti GAO, Pingfang ZHU
图2 交易量占比