重力时序变化系统稳定性的研究
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摘要
把重力时序系统视为慢时变系统,根据线性系统分析的理论方法,用差分方程描述该系统的等价参数模型,通过判断参数序列的稳定性来探索前兆异常。对河西流动重力观测网1994—2009年3个测点的观测数据的计算分析验证了该方法的有效性,但失稳与地震前兆的关系还需进一步研究。
We regard gravity time sequence system as slow time-varying system and use difference equations for describing its equivalent parameter model based on the theory of linear systems analysis. By judging the stability of parametric sequence,we are going to explore the precursors. On the basis of gravity time-varying series from 1994 to 2009 of three observation points in Hexi gravity survey network,we prove that this method is effective,but more research are required to confirm the relations between unstability and seismic precursor anomalies.
We regard gravity time sequence system as slow time-varying system and use difference equations for describing its equivalent parameter model based on the theory of linear systems analysis. By judging the stability of parametric sequence,we are going to explore the precursors. On the basis of gravity time-varying series from 1994 to 2009 of three observation points in Hexi gravity survey network,we prove that this method is effective,but more research are required to confirm the relations between unstability and seismic precursor anomalies.
引文
1祝意青,等.河西地区重力场及其动态演化特征[J].大地测量与地球动力学,2003,(4):44-48.(Zhu Yiqing,etal.Study on gravity field and its dynamic evolutional charac-teristics in Hexi area[J].Journal of Geodesy and Geody-namics,2003,(4):44-48)
2祝意青.青藏高原东北缘强震前兆特征研究[J].国际地震动态,2007,(5):16-21.(Zhu Yiqing.Precursorycharacteristics of stronger earthquakes innortheastern edge ofQinghai-Tibet plateau by using mobile gravity technique[J].Recent Developments in World Seismology,2007,(5):16-21)
3祝意青,等.龙门山断裂带重力变化与汶川8.0级地震关系研究[J].地球物理学报,2009,52(10):2 538-2 546.(Zhu Yiqing,et al.Relations between gravity variation ofLongmenshan fault zone and Wenchuan Ms8.0 earthquake[J].Chinese Journal of Geophysics,2009,52(10):2 538-2 546)
4李辉,等.滇西地区重力场动态变化计算[J].地壳形变与地震,2000,20(1):60-66.(Li Hui,et al.Computation ofdynamic gravity changes in Westen Yunnan[J].Crustal De-formation and Earthquake,2000,20(1):60-66)
5夏德铃.自动控制理论[M].北京:机械工业出版社,2000.(Xia Deling.Automatic control theory[M].Bejing:China Machine Press,2000)
6谢新民,丁锋.自适应控制系统[M].北京:清华大学出版社,2002.(Xie Xinmin and Ding Feng.Adaptive controlsystem[M].Bejing:Qinghua University Press,2002)
7祝意青,等.景泰5.9级地震前后的重力变化研究[J].中国地震,2001,17(4):356-363.(Zhu Yiqing,et al.Research on gravity variation before and after Jingtai Ms5.9earthquake[J].Earthquake Researth,2001,17(4):356-363)
8祝意青,等.民乐6.1、岷县5.2级地震前区域重力场变化研究[J].大地测量与地球动力学,2005,(1):24-29.(Zhu Yiqing,et al.Research on the variation of gravity fieldbefore Minle Ms6.1 and Minxian Ms5.2 earthquakes[J].Journal of Geodesy and Geodynamics,2005,(1):24-29)
9王宏华.现代控制理论[M].北京:电子工业出版社,2006.(Wang Honghua.Mordern control theory[M].Beijng:Publishing House of Electronics Industry,2006)
2祝意青.青藏高原东北缘强震前兆特征研究[J].国际地震动态,2007,(5):16-21.(Zhu Yiqing.Precursorycharacteristics of stronger earthquakes innortheastern edge ofQinghai-Tibet plateau by using mobile gravity technique[J].Recent Developments in World Seismology,2007,(5):16-21)
3祝意青,等.龙门山断裂带重力变化与汶川8.0级地震关系研究[J].地球物理学报,2009,52(10):2 538-2 546.(Zhu Yiqing,et al.Relations between gravity variation ofLongmenshan fault zone and Wenchuan Ms8.0 earthquake[J].Chinese Journal of Geophysics,2009,52(10):2 538-2 546)
4李辉,等.滇西地区重力场动态变化计算[J].地壳形变与地震,2000,20(1):60-66.(Li Hui,et al.Computation ofdynamic gravity changes in Westen Yunnan[J].Crustal De-formation and Earthquake,2000,20(1):60-66)
5夏德铃.自动控制理论[M].北京:机械工业出版社,2000.(Xia Deling.Automatic control theory[M].Bejing:China Machine Press,2000)
6谢新民,丁锋.自适应控制系统[M].北京:清华大学出版社,2002.(Xie Xinmin and Ding Feng.Adaptive controlsystem[M].Bejing:Qinghua University Press,2002)
7祝意青,等.景泰5.9级地震前后的重力变化研究[J].中国地震,2001,17(4):356-363.(Zhu Yiqing,et al.Research on gravity variation before and after Jingtai Ms5.9earthquake[J].Earthquake Researth,2001,17(4):356-363)
8祝意青,等.民乐6.1、岷县5.2级地震前区域重力场变化研究[J].大地测量与地球动力学,2005,(1):24-29.(Zhu Yiqing,et al.Research on the variation of gravity fieldbefore Minle Ms6.1 and Minxian Ms5.2 earthquakes[J].Journal of Geodesy and Geodynamics,2005,(1):24-29)
9王宏华.现代控制理论[M].北京:电子工业出版社,2006.(Wang Honghua.Mordern control theory[M].Beijng:Publishing House of Electronics Industry,2006)
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