1. Jiehui, H., Zhongjie, W.: MOOC-based college English flip classroom teaching model. Foreign Lang. Teach. 6, 40–45 (2014)
2. Eberlein, E., Keller, U.: Hyperbolic distributions in finance. Bernoulli 1(3), 281–299 (1995)
3. Fan, W.: Large-scale open network courses based on relevanceism (MOOC) and its learning support. J. Distance Educ. 30(3), 31–36 (2012)
4. Wang, Y., Zhang, J., Zhang B.: Analysis and revelation of typical project characteristics of large-scale open network courses (MOOC). J. Distance Educ. (4), 67–75 (2013)
5. Liu, S., Pan, Z., Song, H.: Digital image watermarking method based on DCT and fractal encoding. IET Image Process. 11(10), 815–821 (2017)