Ground-penetrating radar (GPR) is a kind of high-frequency electromagnetic detection technology. It mainly used to locate targets and interfaces in underground structures. In addition the effective signals reflected from subsurface objects or interfaces, GPR field work also include noise different clutters, such as antenna-coupled waves, ground radio-frequency interference, which have similar wavelet spectral characteristics with target signals. Clutter seriously interfere target's response...

Numerous learning-based methods have been proposed to address the challenging task of solving inverse scattering problems (ISPs), with requirement ample labeled training datasets. To overcome difficulty collecting fully datasets, we present a physically guided deep unfolding parallel network self-supervised learning strategy solve nonlinear ISPs, called SSISP-Net. The method incorporates physical model and iterative optimization algorithm ISPs into architecture and, thus, forms network....

The evaluation and inspection of steel bars in reinforced concrete structures are critical for prolonging the service life buildings. In this regard, ground-penetrating radar (GPR) has been a crucial alternative due to its non-invasiveness convenience. This paper reports experimental activities on test-site area inside camp Shanghai, China. To assess building, GPR was employed detection localization rebars columns, beams, floors. From B-scan profiles acquired using high-frequency antenna,...

Point cloud registration is a fundamental problem in many applications. The point based on local shape descriptor has been widely researched. In order to further improve the performance of registration, novel method proposed this paper. First, binary designed establish correspondences between two clouds. high descriptiveness. Thus, more correct are established. Then, 3D transformation estimation technique developed, which multiple constraints used accelerate computation. When randomly...

Seismic full-waveform inversion (FWI) is a powerful technique for high-resolution imaging of subsurface physical properties. However, it suffers from the possibility falling into local minimum due to inherent nonlinearity and ill-posedness. Recently, data-driven deep learning approach has been used solve ill-posed inverse problems, with limitations high data collection costs poor model generalization capabilities. To alleviate these difficulties, we unroll iterative optimization algorithm...

SUMMARY The analysis of multistation surface wave records is increasing popularity in imaging the structure Earth due to its robustness on dispersion measurement. Since representation curves (DCs) uncertain laterally varying media, average information beneath receiver array assumed be obtained by inverting with a horizontally layered model. To retrieve more realistic 2-D structure, we present multiscale window waves (MWASW) method for analysing active-source data. MWASW based use forward...

Ground-penetrating radar (GPR) is a well-respected, effective, and efficient geophysical technique. However, for underwater engineering detection archaeology, the measured B-scan profiles typically contain surface-related multiple waves, which can reduce signal to noise ratio interfere with interpretation of results. SRME feedback iteration method based on wave equation, frequently utilized in marine seismic explorations but very rarely GPR detection. To fill this gap, we applied suppress...

Regularization has been an effective technique to provide unique and stable solutions for crosshole ground-penetrating radar (GPR) traveltime tomography. The traditional form of this method, in which a low-order differential operator was used, commonly yields smooth solution that may not be appropriate when anomalies occur block patterns, such as voids or irregular objects. minimum support (MS) functional can used improve the resolution blocky structures; however, GPR tomography, MS is...

Great significance of underwater environment was gradually attracting attention and many traditional methods showed obvious shortcomings in exploration, while the ground penetrating radar (GPR), as a new method this field, performed well identifying suspended solid relic. We conducted GPR survey experiment on drinking water reservoir to test applicability 100 MHz, 200 MHz 400 frequency antenna exploration. The experimental results that electromagnetic waves could penetrate greater depth...

Abstract As a non-destructive geophysical detection method that is not limited by the target depth, cross-hole radar can accurately identify positions and properties of underground cavities. Traditional methods face significant challenges in stability, accuracy, computational efficiency. In recent years, with rapid development deep learning its remarkable achievements field imaging, it has been applied various fields. network structure for image segmentation, Unet model realize “end-to-end”...

In practical applications, microtremor data often encounter contamination from various sources of noise, leading to suboptimal processing outcomes. This study aimed provide a comprehensive analysis the impact noise on method. The focus was presenting explicit and quantitative evidence demonstrate extent which these noises influence accuracy reliability Initially, ten-station triangular array employed gather sequence high-precision data. Next, influencing factors, such as high-amplitude...

The clay dam is fragile and easily found leaking because of the multiple filling biological damage. When leakage problem arises, it critical to find out its causes solutions provide basis for reinforcement. In this paper, there a reservoir in mountain area with has possibility leakage. order characterize delineate source, we used nondestructive investigation methods including Ground Penetrating Radar (GPR) Electromagnetic (EM) site. By analyzing integrated results mentioned above, source was...

Abstract The detection of rebar in pillars, beams and floor slabs building structures is a critical issue urbanized areas. However, due to some natural artificial objective factors, the quantity various rebars not always consistent with design data, which directly affects quality safety building. To ensure structural integrity, inspectors must make full use GPR testing technology. In this paper, we discuss, compare evaluate geophysical methods effects technology regarding possible hidden...

Abstract The availability of microtremor data is potentially affected by various external factors. By combining field and artificial interference, this work aims to determine the correlation between these factors dispersion curve fundamental-mode Rayleigh waves extracted from microtremors. first step was obtain real, high-quality records using a triangular ten-station array 48-m radius. Secondly, series or semi-artificial interferences varying type, duration, amplitude, etc., were generated...

The ketogenic diet (KD) is a similar fasting state that high in fat and low carbohydrate. KD used the treatment of refractory epilepsy, but mechanism not completely clear. According to current research progress, antiepilepsy. This paper reviewed progress application elucidation several metabolic diseases epilepsy syndrome caused by epilepsy. With further development antiepilepsy future, it will only guide more diseases, also provide scientific theoretical basis for discovery new...

Traditionally, the identification and interpretation of ground-penetrating radar (GPR) profiles for underground pipelines have heavily relied on manual operation, which is subjective largely dependent experience operators. Conversely, hash algorithm has been extensively researched utilized in computer vision to classify retrieve digital images. In this letter, we introduce a hashing-based automatically accurately identifying pipeline diffractions GPR profiles. The profile divided into two...