摘要
讨论了断层活动引起的变形场及一般性反演方法。对Ｐｏｗｅｌｌ最优化改进方法作了再改进。再改进的方法对解决多种复杂观测模型的最优化问题提供了可能，并可提高收敛速度。利用１９９５和１９９６年ＧＰＳ观测和相应的倾斜观测对华北地区断层活动进行了定量分析，检测出在张北震源区附近有一与张渤带走向接近的断层活动，给出了活动断层的分布及与张北地震震中的关系。结果表明，这种定量方法对圈定减灾区域是有意义的。
The deformation fields raised by fault movement and a general inverse algorithm are discussed. The Powell optimization algorithm is improved,and the improved method make the optimization widely useful in general inverse. By using the improved algorithm, the fault movement from 1995 to 1996 on the basis of both the GPS and tilt data in northern China is quantitatively studied,and the relationship between fault activity and the zhangbei earth- quake is illustrated.
出处
《地壳形变与地震》
CSCD
2000年第2期30-37,共8页
Crustal Deformation and Earthquake
基金
国家"九.五"攻关项目"伽师及邻区现代构造运动和地形变的GPS监测研究"中的方法部分。
