1.
Zhongguo Gu Shang
; 35(8): 771-4, 2022 08 25.
Article
in Chinese
| MEDLINE
| ID: mdl-35979772
Subject(s)
Diskectomy, Percutaneous , Intervertebral Disc Displacement , Spinal Stenosis , Aged , Endoscopy , Humans , Intervertebral Disc Displacement/complications , Intervertebral Disc Displacement/surgery , Lumbar Vertebrae/surgery , Spinal Stenosis/complications , Spinal Stenosis/surgery , Treatment Outcome
2.
Chaos Solitons Fractals
; 159: 112138, 2022 Jun.
Article
in English
| MEDLINE
| ID: mdl-35493400
ABSTRACT
At the beginning of 2020, COVID-19 swept the world and changed various aspects of human society, such as economy and finance, life and health, migration and population. We first empirically study how the dynamic behaviors of stock markets are affected by COVID-19, and focus on the large volatility dynamics, variation-fluctuation correlation function and epidemic-fluctuation correlation function. Then we generalize the Heston model to simulate the global stock market dynamics, and an epidemic index computed from empirical data is directly taken as the external force in the modelling.