12 citations · 27 across the 4 of their papers we have counts for
Showing 2010Show all
2 papers · 1 filter
astro-ph.SR2010★ 11 cited
Relationship between group sunspot number and Wolf sunspot number
Kejun Li, Hongfei Liang
Continuous wavelet transform and cross-wavelet transform have been used to investigate the phase periodicity and synchrony of the monthly mean Wolf () and group () su…
astro-ph.SR2010★ 12 cited
The Phase Shifts of the Paired Wings of Butterfly Diagrams
Kejun Li, Hongfei Liang, Wen Feng
Sunspot groups observed by Royal Greenwich Observatory/US Air Force/NOAA from May 1874 to November 2008 and the Carte Synoptique solar filaments from March 1919 to December 1989 ar…