In this work, based on our previous calculations of spectral energy distributions for a sample of Fermi blazars (Fan et al. 2015a), we calculated the radio loudness and performed correlation analyses. Our analysis results show that radio loudness is closely anti-correlated with synchrotron peak frequency and positively correlated with gamma-ray luminosity, suggesting that the gamma-ray emissions are strongly beamed.

1. INTRODUCTION
 2. LUMINOSITY AND RADIO LOUDNESS
 3. RESULTS
 4. DISCUSSION AND CONCLUSION
 ACKNOWLEDGMENTS
 REFERENCES

• Jun-Hui Fan(Center for Astrophysics, Guangzhou University, Guangzhou 510006, China, Astronomical Science and Technology Research Laboratory, Department of Education of Guangdong Province, Guangzhou510006, China) Corresponding Author
• Jiang-He Yang(Department of Physics and Electronic Science, Hunan University of Arts and Science, Changde 415000, China)
• Yi Liu(Center for Astrophysics, Guangzhou University, Guangzhou 510006, China, Astronomical Science and Technology Research Laboratory, Department of Education of Guangdong Province, Guangzhou 510006, China)
• Yu-Hai Yuan(Center for Astrophysics, Guangzhou University, Guangzhou 510006, China, Astronomical Science and Technology Research Laboratory, Department of Education of Guangdong Province, Guangzhou 510006, China)
• Cao Lin(Center for Astrophysics, Guangzhou University, Guangzhou 510006, China, Astronomical Science and Technology Research Laboratory, Department of Education of Guangdong Province, Guangzhou 510006, China)
• Hu-Bing Xiao(Center for Astrophysics, Guangzhou University, Guangzhou 510006, China, Astronomical Science and Technology Research Laboratory, Department of Education of Guangdong Province, Guangzhou 510006, China)