Funding for this research was provided by:
National Science Foundation of China (61674025, 61306035)
Fundamental Research Funds for the Central Universities (ZYGX2016J056)
Open Projects of Sichuan Key Laboratory of Meteorological Information and Signal Processing (QXXCSYS201504, QXXCSYS201603)
Received: 17 December 2018
Accepted: 14 January 2019
First Online: 24 January 2019
: The authors declare that they have no competing interests.
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