  The K\"onigl inhomogeneous jet model is applied to investigate the properties
of the jets in Active Galactic Nuclei (AGNs). A sample of the AGNs is
collected, in which the measurements of the angular size and radio flux density
of the VLBI core, proper motion of the components in the jet, and X-ray flux
density are included. The inhomogeneous jet parameters are derived with the
same assumptions for all sources. A comparison among the parameters of
different types of sources in the sample is presented. It is found that most of
EGRET (Energetic Gamma-ray Experiment Telescope) sources have higher Doppler
factor \delta, larger Lorentz factor \gamma, and smaller viewing angle \theta,
when compared with the remaining sources in the sample. The statistical
analyses show that the derived Doppler factor \delta is strongly correlated
with the observed 22 GHz brightness temperature. Furthermore, there is a
correlation between the relative $\gamma $-ray luminosity and the Doppler
factor \delta. The implications of these results are discussed.
