We construct a rock physics workflow to link the elastic properties of shales complex constituents and specific microstructure attributes. The key feature in our model is degrees preferred orientation clay kerogen particles defined by proportions such their total content. self-consistent approximation method Backus averaging are used consider isotropic distribution compositions pores shales. Using core well log data from Barnett Shale, we demonstrate application constructed templates for...

Abstract We study the detailed mantle transition zone structure beneath active Changbai intraplate volcano in Northeast China by using a receiver‐function method. A total of 3005 teleseismic receiver functions recorded 70 broadband stations are obtained common‐conversion‐point stacking For conducting time‐to‐depth conversion, we use three‐dimensional velocity model region so as to take into account influence structural heterogeneities. Our results reveal significant depth variations 410,...

Detection of buried landmines by ground penetrating radar (GPR) normally suffers from very strong clutter that will decrease the image quality in GPR data. Problems are also encountered when imaging steeply dipping GPR. To solve these problems, we have developed a stepped-frequency continuous-wave array antenna system, called SAR-GPR, can acquire common middle point multi-offset As an approximate solution to general wavefield inversion problem, migration algorithms were used refocus...

Polarimetric technology has been one of the most important advances in microwave remote sensing during recent decades. H-alpha decomposition, which is a type polarimetric analysis technique, common for terrain and land-use classification synthetic aperture radar. However, technique less ground penetrating radar (GPR) community. In this paper, we apply decomposition to analyze surface GPR data obtain attributes subsurface target classification. Also, by combining migration, can color-coded...

To ensure effective long-term CO2 storage in candidate geological sites, potential leakage pathways to the surface must be evaluated. Fracture permeability is likely pathway for migration through low-permeability tillite surface. Further, spatial distribution of within fracture network vary time as fluid rock interaction seals fractures (Clare E. Bond et al., 2017). Therefore, monitoring and their changes very important storage. The total nonlinear signal strongly influenced by cracks,...

The effect of combined induction by Cu(II) and veratrole on the degradation high molecular weight polyaromatic hydrocarbons (HMW-PAHs) Fusarium sp. ZH-H2 was investigated. This strain characterized as F. dlaminii. combination treatment with (CL) improved efficiency a mixture 10 HMW-PAHs 16 % compared to control without inducer (CK), 5 single (C), 12 (L). In particular, benzo(g,hi)perylene (BghiP) 36 CK 52 L. CL increased lignin peroxidase (LiP) activity 162 at day incubation 277 C....

Large Language Models (LLMs) have shown significant capability across various tasks, with their real-world effectiveness often driven by prompt design. While recent research has focused on optimizing content, the role of formatting, a critical but overlooked dimension, received limited systematic investigation. In this paper, we introduce Content-Format Integrated Prompt Optimization (CFPO), an innovative methodology that jointly optimizes both content and formatting through iterative...

Understanding the nonlinear elastic behavior of rocks has primarily been based on laboratory observations or numerical simulations. However, due to inherent complexities and uncontrollable nature real-world systems, field measurements elasticity remain a significant challenge. In-situ “Pump-Probe” type experiments, analogous those conducted in laboratories, provide valuable approach for characterizing mechanical properties Earth materials. Environmental factors, such as...

This study reports the results of full-polarimetric Mars Rover Penetrating Radar (RoPeR) data acquired by China’s Tianwen-1 mission. A double-layered regolith structure within a depth 3 m is revealed which are different in scattering features, structure, and maturity. Five types dense rocks identified at surface subsurface. Three these residual materials native craters. Besides, on Martian isolated boulders delivered adjacent impacting or windblown events. The first stratum have...

ABSTRACT We propose a new ground‐penetrating radar (GPR) methodology for buried land‐mine detection. A GPR system using an antenna array was used common‐midpoint (CMP) data acquisition. This uses of ten Vivaldi antennae and operates from 30 MHz to 6 GHz. The moveout the CMP corrected were stacked suppress ground clutter. tested in laboratory we showed that it images mine‐like targets with high resolution. model plastic Type‐72 soil consisting mixture gravel crushed rocks could be detected by...

In this paper, we combine the multiple-input-multiple-output (MIMO) array antenna technology with a multipolarization component in ground penetrating radar (GPR) system to improve target detection accuracy. The MIMO introduced previous literature is widely applied and other wireless communication fields. Here, apply "plane-wave like" (PWL) source that uses antennas small spacing emit pulse at same time GPR detection. First, analyze physical mechanism of "PWL" resolution. Then, carry out...

To examine the distribution pattern and controlling factors of oil gas accumulation in Baiyun Sag systematically, this study analyzes key hydrocarbon using a large amount seismic, drilling geologic data. It is concluded that controlled by following factors: (1) Massive source rock physical basis formation medium fields. (2) Orderly regulated differential generation accumulation: spacial leads to "inner gas, outer oil" pattern, east subsag Baiyun; timing "upper lower pattern. (3) Late fault...

Abstract Background Brain tumor segmentation is a challenging problem in medical image processing and analysis. It very time-consuming error-prone task. In order to reduce the burden on physicians improve accuracy, computer-aided detection (CAD) systems need be developed. Due powerful feature learning ability of deep technology, many learning-based methods have been applied brain CAD achieved satisfactory accuracy. However, neural networks high computational complexity, process consumes...

Abstract Cracks, joints, fluids, and other pore‐scale structures have long been hypothesized to be the cause of large elastic nonlinearity observed in rocks. It is difficult definitively say which features are most important, however, because difficulty isolating source nonlinear interaction. In this work, we focus on influence cracks recorded signal particular how orientation microcracks changes strength We do by studying effect measurements a rock with anisotropy correlated presence...

The Chinese Chang’E-4 mission for moon exploration has been successfully completed. probe achieved the first-ever soft landing on floor of Von Kármán crater (177.59°E, 45.46°S) South Pole-Aitken (SPA) basin January 3, 2019. Yutu-2 rover is mounted with several scientific instruments including a lunar penetrating radar (LPR), which an effective instrument to detect subsurface structure. During interpretation LPR data, velocity electromagnetic waves vital parameter necessary stratigraphic...

As one of the main payloads mounted on Yutu-2 rover Chang’E-4 probe, lunar penetrating radar (LPR) aims to map subsurface structure in Von Kármán crater. The field LPR data are generally masked by clutters and noises large quantities. To solve noise interference, dozens filtering methods have been applied data. However, these their limitations, so suppression is still a tough issue worth studying. In this article, denoising convolutional neural network (CNN) framework weak signal extraction...

For water dynamics investigation in unsaturated (vadose) zones, ground penetrating radar is a popular hydro-geophysical method because it non-invasive for soil, has high resolution and the results have direct link with content. Soil content soil hydraulic properties are two key factors describing vadose zones. There been tremendous progress estimation radar. The purpose of this paper to provide an overview application studies. This first summarizes various methods determination including...