supported by the National Basic Research Program of China(Grant No.2010CB832800);the National Natural Science Foundation of China(Grant Nos.11175160 and 11275075);the Natural Science Foundation of Key Projects of Hubei Province,China(Grant No.2013CFA045)
The environmental noise can restrict the accuracy of period estimation since the torsion pendulum is sensitive to weak forces. Two typical models for the environmental noise are proposed to make an evaluation. General...