Among the high-redshift quasars, the radio-loud subsample constitutes an attractive group since the radio jets are directly related to the SMBH activity. Until now, more than 100 quasars have been detected at z > 5 while the fraction of radio-loud ones is about 10 percent. Recently, a science tea...
Compared with the observed annual deformations in GPS stations , they found that the seasonal GPS observations , the transverse displacements in particular , are better explained after considering the thermoelastic effects due to temperature variations .Annual contribution of the mass-loading ( b...
SHAO was formally established in 1962 following the amalgamation of the former Xujiahui (originally spelt Zi-Ka-Wei) and Sheshan observatories, which were founded by the French Mission Catholique in 1872 and 1900 respectively.
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