Deformation analysis with robust methods in geodetic nets

Geodetic Deformation Analysis with Respect to Observation Imprecision

The significance of estimated point and object movements in geodetic deformation analysis depends essentially on the quality of the observations and analysis techniques. A comprehensive modeling of the complete analysis process from the original observations to the parameters of interest requires an adequate consideration and propagation of all sources of uncertainty. In this study, the uncerta...

Geometrical Deformation Analysis of Gotvand-Olya Dam Using Permanent Geodetic Monitoring Network Observations

  In this paper, two-dimensional deformation analysis of the Gotvand-Olya dam is done using daily, monthly, seasonal and annual displacement vectors derived from permanent observations of the dam geodetic monitoring network.  The strain tensor and its invariant parameters like dilatation and maximum shear are computed as well. Nonlinear finite element interpolation based on C1 Cubic Bezier int...

Robust efficiency in data envelopment analysis with VRS technology

One of the fundamental problems in the classic DEA is lack of ability to distinguish unit's performance scores that is considered as a disadvantage. Recently, Parkan et al. [9] tried to address this problem.   They proposed to assess each unit both optimistic and pessimistic views are taken into account. In contrast to traditional evaluation, one index is considered for each unit based on the l...

Geodetic network design for InSAR: Application to ground deformation monitoring

We propose a novel geodetic network design method for InSAR that determines the minimum number and optimal locations of in situ devices for monitoring a deforming area within desired quality constraints (precision, reliability, economy). From field experiments, the use of low-cost active radar transponders has been validated, and their measurement precision estimated. The proposed design algori...

Robust data envelopment analysis with uncertain date: An analysis to measure hotel efficiency in Crete