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We fit the spectral energy distributions (SEDs) of members of a large sampleof Fermi 2LAC blazars to synchrotron and inverse Compton (IC) models. Our mainresults are as follows. (i) As suggested by previous works, the correlationbetween peak frequency and curvature can be explained by statistical orstochastic particle acceleration mechanisms. For BL Lacs, we find a linearcorrelation between synchrotron peak frequency and its curvature. The slope ofthe correlation is consistent with the stochastic acceleration mechanisms andconfirm previous studies. For FSRQs, we also find a linear correlation, but itsslope cannot be explained by previous theoretical models. (ii) We find asignificant correlation between IC luminosity and synchrotron luminosity. Theslope of the correlation of FSRQs is consistent with the EC process. And theslope of the correlation of BL Lac is consistent with the SSC process. (iii) Wefind several significant correlations between IC curvature and several basicparameters of blazars (black hole mass, broad line luminosity, the Lorentzfactor of jet). We also find significant correlations between bolometricluminosity and these basic parameters of blazars which suggest that the originof jet is a mixture of the mechanisms proposed by Blandford $\&$ Znajek and byBlandford $\&$ Payne.

Curvature of the spectral energy distribution, the dominant process for inverse Compton component and other jet properties in Fermi 2LAC blazars