  The dependence of the sources and properties of the near-Earth solar wind on
solar cycle activity is an important issue in solar and space physics. We use
the improved two-step mapping procedure that takes into account the initial
acceleration processes to trace the near-Earth solar winds back to their source
regions from 1999 to 2020, covering solar cycles (SCs) 23 and 24. Then the
solar wind is categorized into coronal hole (CH), active region (AR), and quiet
Sun (QS) solar wind based on the source region types. We find that the
proportions of CH and AR (QS) wind during SC 23 are higher (lower) than those
during SC 24. During solar maximum and declining phases, the magnetic field
strength, speed, helium abundance (AHe), and charge states of all three types
of solar wind during SC 23 are generally higher than those during SC 24. During
solar minimum, these parameters of solar wind are generally lower during SC 23
than those during SC 24. There is a significant decrease in the charge states
of all three types of solar wind during the solar minimum of SC 23. The present
statistical results demonstrate that the sources and properties of the solar
wind are both influenced by solar cycle amplitude. The temperatures of AR, QS,
and CH regions exhibit significant difference at low altitudes, whereas they
are almost uniform at high altitudes.
