As can be seen from the figure, the average annual number of publications is 2.7, the number of publications is 1 in 2003, 2005, 2006 and 2011, and the number of publications is only in 2009, and the annual publication is 3 There are 2010, 2014 and 2016, and the annual publication volume is 4 in 2008, 2013, 2015, 2018, 2019, and there are no related master and doctoral dissertations in 2004 and 2006. The most are 6 in 2017.
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