jgg     2013 33 (2):  91-95    ISSN: 0412-1961  CN: 21-1139/TG CLOCK ERROR PREDICTION USING LEAST SQUARES SUPPORT VECTOR MACHINES 1）National Time Service Centre, CAS, Xi’an 710600 2）Key Laboratory of Time and Frequency Primary Standards, CAS, Xi’an 710600 3）Key Laboratory of Precision Navigation and Timing Technology, CAS, Xi’an 710600 4）University of Chinese Academy of Sciences, Beijing 100049 Received: 2012-11-08  Revised: null  Online: 2013-04-18 Supporting info