极点对称模态分解下西安高温天气的趋势特征
李双双, 延军平, 孔锋, 高文兰, 王娟, 赵怡

The nonlinear trends of high temperature weather in Xi'an by extreme-point symmetric mode decomposition method
Shuangshuang LI, Junping YAN, Feng KONG, Wenlan GAO, Juan WANG, Yi ZHAO
图5 1960-2016年西安热浪日数和高温日数变化特征
Fig. 5 Variation of heat waves and hot days in Xi'an during 1960-2016