Slope instability is one of the important factors affecting open pit mine's safety production, and it is difficult to detect and monitor the slope stability. Because deformation disasters can be caused by a variet...
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Aiming at the problem of the number of residual points due to environmental noise in the interference phase diagram, it will cause some loss to the phase unwrapping and terrain deformation inversion precision. This pa...
ISBN:
(数字)9781728129129
ISBN:
(纸本)9781728129136
Aiming at the problem of the number of residual points due to environmental noise in the interference phase diagram, it will cause some loss to the phase unwrapping and terrain deformation inversion precision. This paper proposes a phase-preserving filtering method based on contourlet transform. The method adopts the idea of multi-resolution and multi-direction, which leads to the improvement of the performance of the method. Firstly, the image is decomposed by using a directional filter; the second is to perform phase-preserving filtered on the decomposed image. Compared with the traditional methods, this method has a significant drop in the residual point, and the calculation amount is small, which is suitable for processing the measured data. In this paper, the effectiveness of the proposed algorithm is verified by InSAR data.
Multitemporal ground-based imaging radar images have been successfully used for the detection of different types of terrain changes. The image change detection of the ground-based imaging radar is used to estimate the...
ISBN:
(数字)9781728123455
ISBN:
(纸本)9781728123462
Multitemporal ground-based imaging radar images have been successfully used for the detection of different types of terrain changes. The image change detection of the ground-based imaging radar is used to estimate the interference change information in the monitoring area within a short time baselines to avoid misjudging the radar deformation image. Many scholars have proposed many effective detection methods for spaceborne radar images, but there are few researches on the change detection method of ground-based imaging radar images. In this paper, a change detection method for ground-based imaging radar image is proposed. To obtain the change information of ground-based imaging radar, the difference map and coherence coefficient map were used to obtain the change region. Experiment results show that the proposed method is effective for ground-based imaging radar image change detection in terms of smooth the background noise and enhance the contrast between the changed and unchanged portions.
This paper presents a new arcuate antenna array which is introducing to operate at W band with HFSS_MATLAB_API script design. The complex arcuate antenna array has been designed with MATLAB and HFSS according to the s...
ISBN:
(数字)9781728129129
ISBN:
(纸本)9781728129136
This paper presents a new arcuate antenna array which is introducing to operate at W band with HFSS_MATLAB_API script design. The complex arcuate antenna array has been designed with MATLAB and HFSS according to the script programming framework which has already finished the modeling, numerical solution and simulate analysis. The azimuthal and pitch-oriented array antennas radiation pattern and the 3D polar plot have been obtained from the signal processing. Then the simulated results show that the late-model arcuate antenna provides favorable performance in terms of low side lobes radiation pattern and directionality. Therefore, the feasibility and practicability of arc antenna array can be realized through optimization design.
The Polarimetric target decomposition method based on scattering model is a hotspot, but there is a problem that decomposition results are inconsistent with actual scattering of ground objects. In order to solve the p...
ISBN:
(数字)9781728129129
ISBN:
(纸本)9781728129136
The Polarimetric target decomposition method based on scattering model is a hotspot, but there is a problem that decomposition results are inconsistent with actual scattering of ground objects. In order to solve the problem, a new polarimetric SAR data decomposition method based on generalized volume scattering model is proposed in this paper. Matrix rotation theory on basis of the dominant scatterer is used in the method, which removes cross-polarized scattering power generated by the coupling between orthogonal states of polarization. On this basis, a suitable volume scattering model is selected, which ultimately makes decomposition results are closer to scattering characteristics of ground objects and reduces the number of negative power pixels. Experiments show that the results of novel decomposition method reflect the scattering characteristics of real objects more accurately.
Landslide is a common natural geological disaster, and the development process of landslide is so complicated, then makes the prevention and control of landslide very difficult. In the process of landslide monitoring ...
ISBN:
(数字)9781728129129
ISBN:
(纸本)9781728129136
Landslide is a common natural geological disaster, and the development process of landslide is so complicated, then makes the prevention and control of landslide very difficult. In the process of landslide monitoring and control, the estimation of slope sliding direction is very important. Based on the monitoring data of D-InSAR (Differential Intereferometric Synthetic Aperture radar), combined with the geometric relationship between the monitoring target and radar, as well as the objective laws observed in the natural deformation process of the slope, a method to estimate the sliding direction of the slope is proposed in this paper. This paper uses the monitoring data of two slopes as an example and verifies the feasibility and effectiveness of the method in the face of the point target and the whole slope through comparison with the monitoring data of GPS, the comparison results show good consistency.
Ground-based radar is an application of microwave imaging on ground platform, which has the characteristics of repeatable observation, stability and controllability, and can be applied to the long-term observation of ...
ISBN:
(数字)9781728129129
ISBN:
(纸本)9781728129136
Ground-based radar is an application of microwave imaging on ground platform, which has the characteristics of repeatable observation, stability and controllability, and can be applied to the long-term observation of slope deformation, urban subsidence and landslides. However, the fundamental imaging principle of current ground-based radar is to create a large synthetic aperture through radar's moving on a linear orbit, but adopting this method, the angle of view is limited and 360° monitoring is impossible. Therefore, it is of great significance to study the full-azimuth micro deformation monitoringradar (namely the rotating micro deformation monitoringradar), for observing large scenes featuring with large angle of view.
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