拟准检定法用于划分不同运动趋势块体

利用位移观测数据区分不同形变趋势块体一般分三步进行:基准检测、块体范围区分和各块体内异常形变检测．本文提出用拟准检定法来实现这三步．前两步初选拟准观测是关键．对于基准检测，按形变位移量大小；对于块体范围区分，则按形变方向．最后，通过一个模拟算例，简单介绍了每一步的实施步骤，并比较了拟准检定法与抗差估计(Huber)法、假设检验法的检测效果．结果表明，拟准检定法可以将上述三步成功实现，而抗差估计法只能检测出块体内的异常形变，对稳定基准检测和块体范围划分是失败的；假设检验法在该三步检测中均为失败．从而验证了拟准检定法具有粗差定位准确、崩溃污染率高的优越性． 

A NEW APPROACH FOR DISTINGUISHING DIFFERENT DEFORMATION TREND BLOCKS WITH DISPLACEMENT OBSERVATIONS

A new approach by use of that the different deformation trend blocks could be distinguished with displacement observations includes three steps, which are datum detection, block scope told part and anomalous deformations detection in blocks. The three steps are implemented by quasi-accurate detection in the paper. Because the number of anomalous displacements is big in the previous two steps, the first selection for quasi-accurate observations is key. The first selection is according to the size of deformation displacement for datum detection and according to the direction of deformation for block scope told part. At last through an example, each implementation process is introduced simply and the detection effect of quasi-accurate detection is compared with that of the robust estimation (Huber) and the hypothesis test. The result indicates that the three steps can be implemented successfully with quasi-accurate detection and that the anomalous deformations in blocks can be detected but the steps of the datum detection and block scope told part are failed by robust method. The detections of three steps are failure by hypothesis test. The results show that the quasi-accurate detection has the virtues that the location is much accurate and the breakdown pollution rate is high compared with the other two methods.