  Many experiments have confirmed the spectral hardening at a few hundred GV of
cosmic-ray (CR) nuclei spectra, and three general different origins have been
proposed: the primary source acceleration, the propagation, and the
superposition of different kinds of sources. The AMS-02 CR nuclei spectra of
He, C, N, O, Ne, Mg, Si, and B (which including B and its dominating parents
species) are collected to study the necessity of employing a break in diffusion
coefficient and independent breaks in primary source injection spectra to
reproduce the spectral hardening at a few hundred GV. For comparison, three
different schemes are introduced to do the global fitting. The fitting results
show that both the break in diffusion coefficient and the independent breaks in
primary source injection spectra are needed, which are corresponding to the
spatial dependent propagation and the superposition of different kinds of
sources, respectively. Consequently, the nuclei spectral hardening in a few
hundred GV should have hybrid origins. Moreover, the CR spectral indices of He
and Ne show large deviations to other species in low-rigidity region, which
indicates their different CR origins.
