jgg     2011 31 (6):  1-5    ISSN: 0412-1961  CN: 21-1139/TG NUMERICALLY MODELING OF ANNUAL CHANGE OF TECTONIC STRESS FILED IN NORTH CHINA Chen Lianwang ;and Zhan Zimin Laboratory of Numerical Modeling, Institute of Crustal Dynamics, CEA, Beijing 100085 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null