Journal of Applied Geophysics最新文献

{"title":"Horizontal arranged long rectangular source TEM perspective for sensing hidden water-rich areas in an working face","authors":"Maofei Li,&nbsp;Zhihai Jiang,&nbsp;Shucai Liu,&nbsp;Benyu Su,&nbsp;Xuerui Tong","doi":"10.1016/j.jappgeo.2025.105862","DOIUrl":"10.1016/j.jappgeo.2025.105862","url":null,"abstract":"<div><div>With the realization of intelligent mines and ultrawide working faces, there are new challenges in current geophysical detection. To meet these challenges and achieve precise detection of water-rich areas within working faces, roofs and floors, we propose horizontally arranged long rectangular source transient electromagnetic (TEM) perspective detection technology. Compared to the traditional TEM based on mid to late stage data interpretation, the perspective technology proposed in this paper mainly focuses on early stage data interpretation. Particularly, a long rectangular loop is horizontally laid on one side of the working face roadway as the emission source, and transient induction signals are received on the opposite side of the roadway. By analyzing the signal characteristics, geological isomers inside the working face and floor are detected. First, the distribution pattern of TEM fields in the full space was obtained through theoretical analysis. Unlike ground TEM, the diffusion of TEM fields in full space is not affected by the ground-air boundary, and its spatiotemporal diffusion does not satisfy the smoke ring effect. Subsequently, through numerical simulation of different geoelectric models, the detection and resolution capabilities of the proposed TEM perspective method were studied. Compared with the traditional same-side transmission and reception mode, the early data of the perspective observation mode are mainly affected by transient changes in the primary magnetic field, which has high resolution. Late stage data are affected by the inflection points of positive and negative data, making it difficult to accurately obtain abnormal body information. Finally, an on-site experiment was conducted in a coal mine in Henan, China. The experimental data characteristics were highly consistent with the synthesized data, verifying the method's feasibility. Additionally, the result accuracy was further verified by on-site drilling data. The proposed method not only improves the accuracy of TEM detection in mines but also enriches the detection environment of TEM methods.</div></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"241 ","pages":"Article 105862"},"PeriodicalIF":2.2,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of dynamic disturbances and dry-wet cycles on the degradation law and acoustic emission evolution characteristics of argillaceous sandstone: An experimental study","authors":"Nengzeng Long,&nbsp;Fei Wu,&nbsp;Song Ren,&nbsp;Zheng Chen,&nbsp;Ping Zhang,&nbsp;Chuang Zhang","doi":"10.1016/j.jappgeo.2025.105860","DOIUrl":"10.1016/j.jappgeo.2025.105860","url":null,"abstract":"<div><div>In order to gain an in-depth understanding the influence of dynamic disturbances and dry-wet cycles on the degradation and damage of argillaceous sandstone, the uniaxial compression and acoustic emission (AE) monitoring tests were carried out under different dynamic disturbance amplitudes (<em>r</em>) and number of dry-wet cycles(<em>n</em>) in this study. The results indicate that when the UCS exceeds 20 %, the argillaceous sandstone begins to deteriorate, and the mechanical parameter variations exhibit a distinct Poly 2D function relationship with the <em>r</em> and <em>n.</em> The evolutionary characteristics of acoustic emission parameters can be divided into the active, calm, critical, and abrupt periods. By analyzing the evolution trend of cracks using the k-means clustering algorithm and AE localization, it was found that with the increase of <em>r</em> (20 % to 60 % UCS) and <em>n</em>, the tensile cracks in argillaceous sandstone gradually transitioned into composite and shear cracks. The deep learning model recognition accuracy for the test and validation samples reaching 89.27 % and 80.62 %, respectively. The research results are of guidance values for improving the operation safety and stability of muddy sandstone slope projects.</div></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"241 ","pages":"Article 105860"},"PeriodicalIF":2.2,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seismic site effects and aptitude to urbanization for the study area of Taroudant, South-West of Morocco","authors":"Sliman Hitouri ,&nbsp;El Arbi Toto ,&nbsp;Mohamed Hafid ,&nbsp;Aomar Ibenbrahim ,&nbsp;Abdelouahed Birouk ,&nbsp;El Mouraouah Azelarab","doi":"10.1016/j.jappgeo.2025.105856","DOIUrl":"10.1016/j.jappgeo.2025.105856","url":null,"abstract":"<div><div>An integrated study combining ambient noise data analysis and Multichannel Analysis of Surface Waves (MASW) 1-D shear wave velocity profiles was conducted for earthquake mitigation in the study area of Taroudant, South-West of Morocco. To assess soil site effects and the physical characteristics of the near-surface layers, microtremor measurements were taken at 72 sites to obtain H/V ratios, and 17 MASW profiles were recorded. Two classes of dominant frequencies were identified. The low frequencies of class 1 are attributed to the top of a Paleozoic rigid basement located at a depth of at least 75 m, while the high frequencies of class 2 are likely generated by near-surface seismic interfaces at depths ranging from 6 to 10 m. A thick Plio-Quaternary alluvial sedimentary cover, composed mainly of poorly consolidated clays and silts to consolidated conglomerates, has accumulated in either flat-lying layers or in small depressions with limited extent.</div><div>Maps constructed from the 1-D 1D Vs-depth profiles indicate that the rocks underlying the study area have significant rigidity, as evidenced by the Vs30 values, which range between 360 and 750 m/s. The computed Vs30 values place the soil in the S2 class according to the classification of soils in the Moroccan seismic design code (RPS 2000, Version 2011). The calculated amplification factors range from 1.68 to 2, with higher values observed in the southwestern part of the area, where the near-surface geology consists primarily of soft silty terraces and alluvium deposited by the Oued Souss River. Lower amplification values are found in the northern part of the area, where the sediments are primarily composed of relatively consolidated to semi-consolidated alluvial deposits. Overall, the study area is characterized by low to moderate amplification factor values (1.68 to 1.88), indicating that the area may experience low to moderate seismic site effects in the event of a significant earthquake.</div></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"241 ","pages":"Article 105856"},"PeriodicalIF":2.2,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seismic modeling using a first-order acoustic wave equation with vector reflectivity in isotropic and anisotropic media","authors":"Edvaldo S. Araujo ,&nbsp;Reynam C. Pestana","doi":"10.1016/j.jappgeo.2025.105834","DOIUrl":"10.1016/j.jappgeo.2025.105834","url":null,"abstract":"<div><div>We have developed a new first-order acoustic wave equation parameterized by velocity and vector reflectivity for isotropic and anisotropic media. This equation has been contrasted with the first-order wave equation using the variables velocity and density and we have demonstrated the equivalence between the two equations. The full acoustic seismic wavefield can be generated without explicit knowledge of density if an estimate of reflectivity is known. To numerically solve the proposed equation we have employed a scheme derived from the Lie product formula where the time evolution operator of the analytic solution is written as a product of exponential matrices, and each exponential matrix term is approximated by the Taylor series expansion. Moreover, we have presented numerical results demonstrating the equivalence between the two equations for a known earth model. In addition, we have also shown how the numerical solution of the proposed equation has allowed a straightforward implementation of perfectly matched layer (PML) absorbing boundary condition. To demonstrate the efficiency and applicability of the PML scheme we also have compared the results of numerical modeling using PML with the results obtained by the second-order wave equation parameterized by velocity and vector reflectivity with traditional attenuation absorbing boundary condition.</div></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"241 ","pages":"Article 105834"},"PeriodicalIF":2.2,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of an opposing coils frequency domain electromagnetic method transmitter","authors":"Tao Guo ,&nbsp;Qingbin Liu ,&nbsp;Zhenzhu Xi ,&nbsp;Zhiqing Zhang ,&nbsp;Qingxin Qi ,&nbsp;Xingpeng Chen ,&nbsp;Huatao Diao","doi":"10.1016/j.jappgeo.2025.105847","DOIUrl":"10.1016/j.jappgeo.2025.105847","url":null,"abstract":"<div><div>The frequency-domain electromagnetic (FDEM) method is widely applied in near-surface geophysical investigations. However, traditional bistatic FDEM sensors often exhibit low spatial resolution, while monostatic designs such as gradient and bucking coils face challenges due to structural complexity and limited anti-interference capabilities. Opposing coils, a weak-coupling configuration commonly used in transient electromagnetic (TEM) methods, have shown promising performance. Based on the equivalence between time and frequency domains, this study aims to fabricate an FDEM transmitter using opposing coils to verify its performance in frequency domain. A prototype transmitter was developed using a full-bridge circuit to generate alternating current from a battery source, with an absorption circuit added for circuit protection. To overcome high-frequency suppression caused by coil inductance, series resonance was employed to increase emission current. Two relay control schemes were tested, and the causes of abnormal pulse phenomena were analyzed. Field experiments comparing the prototype with the commercial GEM-2 system demonstrate that the prototype—featuring stronger transmission currents and an opposing-coil configuration—yields higher signal amplitudes and more distinct anomalies. These results indicate enhanced spatial resolution and sensitivity to shallow subsurface features, underscoring the effectiveness of opposing coil designs for improving near-surface FDEM imaging.</div></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"241 ","pages":"Article 105847"},"PeriodicalIF":2.2,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Subsurface structure assessment for landfill using distributed acoustic sensing: A case study in Qingdao, China","authors":"Shangrao Sun ,&nbsp;Yizhe Su ,&nbsp;Danping Cao ,&nbsp;Hepu Chen ,&nbsp;Kaijun Xu ,&nbsp;Jian Tian ,&nbsp;Houzhen Yan","doi":"10.1016/j.jappgeo.2025.105855","DOIUrl":"10.1016/j.jappgeo.2025.105855","url":null,"abstract":"<div><div>As a rapidly developed seismic observation technology, distributed acoustic sensing (DAS) has shown great potential in many fields such as near surface wave imaging and oil and gas exploration. Taking a landfill site as an example, this research uses DAS seismic data to carry out the study of near surface wave imaging based on DAS. By analyzing the spectral characteristics of DAS ambient noise data, an ambient noise data screening method based on power spectral density (PSD) spectrum is proposed to obtain high-quality virtual shot gather and dispersion spectrum images. A joint active and passive dispersion curve (DC) inversion flow is designed to obtain the shear wave velocity profile. The result indicates the low-velocity layer at the top of the landfill site and the transverse discontinuous interface inside are found. At the same time, the resistivity profile is obtained by inversion of the high-density resistivity data collected from the landfill site, which shows the high-resistivity region on the surface and the transverse discontinuous interface of the internal resistivity. The spatial positions of the abnormal regions in the inversion profiles of the two physical property parameters are very consistent, which proves the effectiveness of the proposed method. Our research can lay a foundation for structural inspection of landfill based on DAS.</div></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"241 ","pages":"Article 105855"},"PeriodicalIF":2.2,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of magnetic and geochemical characteristics of soils for hydrocarbons prospecting. A case study “Nedilna field” Kharkiv region, Ukraine","authors":"Bohdan Kruhlov ,&nbsp;Оleksandr Menshov ,&nbsp;János Csizmeg ,&nbsp;Oleksandr Kruglov ,&nbsp;Ihor Bahrii","doi":"10.1016/j.jappgeo.2025.105857","DOIUrl":"10.1016/j.jappgeo.2025.105857","url":null,"abstract":"<div><div>The search for hydrocarbon reserves often requires innovative and cost-effective exploration methods. This study investigates the application of magnetic and atmogeochemical techniques to identify hydrocarbon sites by analyzing the impact of hydrocarbon microseepage on soil magnetic properties. The study focused on analyzing 49 samples of soil and soil air collected near the wells Nedilyna-1, −3 (productive), and Nedilyna-2, −5 (non-productive). Hydrocarbons that migrate through the soil cover alter its magnetic characteristics, including magnetic susceptibility (MS, χ), and variations in the magnetic field. This alteration is attributed to processes such as oxidation and reduction of ferromagnetic minerals within the soil. The results show a significant heterogeneity of soil magnetic characteristics in the study area. The soil is characterized by an increase in soil MS in places of increased density and gravity (interpreted by Pixler and Wetness Ratio) of hydrocarbon gases in the soil in tableland areas. The explanation is the fact that hydrocarbons characterized by higher density and gravity, typically with more fused aromatic rings, exhibit greater biological activity due to their increased persistence in the environment and reduced solubility in water. The results provide evidences for the formation of highly magnetic minerals in close association with hydrocarbon seepage. Recognition of such seepage-induced magnetic anomalies can be used to facilitate the exploration for oil and gas. This approach provides a practical tool for early-stage hydrocarbon exploration, potentially reducing the cost and time associated with more conventional techniques. At the same time, the area with erosion processes requires a more detailed study, and the need to create a mechanism for adjusting the MS values for heavily eroded and washed soil.</div></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"241 ","pages":"Article 105857"},"PeriodicalIF":2.2,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on fracture complexity of shale hydraulic fracturing based on complex resistivity","authors":"Fang He ,&nbsp;Xiaolong Tong ,&nbsp;Kui Xiang ,&nbsp;Liangjun Yan ,&nbsp;Yanling Shi ,&nbsp;Zuzhi Hu ,&nbsp;Xinghao Wang ,&nbsp;Chi Zhang","doi":"10.1016/j.jappgeo.2025.105854","DOIUrl":"10.1016/j.jappgeo.2025.105854","url":null,"abstract":"<div><div>Hydraulic fracturing is the core technology to improve the physical properties of unconventional reservoirs and realize the effective development of unconventional oil and gas resources. Compared with microseismic monitoring, electromagnetic monitoring method is based on the induced polarization (IP) difference between fracturing fluid and surrounding rock, and has a better physical foundation. Aiming at the relationship between fracture development complexity and rock IP characteristics during shale hydraulic fracturing, this paper deeply analyzes the changes of rock conductivity or formation factors before and after fracturing, and the relationship between surface conductivity and rock fracturing complexity, a method for characterizing fracture complexity based on IP parameters is proposed, and the validity of the method is verified by combining the image analysis of fracture development on the test surface. This method realizes the limitation that the shale fracture degree is concerned with the fracturing degree to achieve higher seepage and ignores the rock anisotropy, and provides a new idea and method for analyzing shale hydraulic fracturing based on IP method.</div></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"241 ","pages":"Article 105854"},"PeriodicalIF":2.2,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In-situ AFM measurement on the micro-surface potential of coal under variable loads","authors":"Xianghui Tian ,&nbsp;Dazhao Song ,&nbsp;Majid Khan ,&nbsp;Weixiang Wang ,&nbsp;Huaijun Ji ,&nbsp;Zhenlei Li","doi":"10.1016/j.jappgeo.2025.105853","DOIUrl":"10.1016/j.jappgeo.2025.105853","url":null,"abstract":"<div><div>The electromagnetic radiation (EMR) method has long been utilized in monitoring and early warning of coal mine dynamic disasters globally. However, the governing mechanism of coal fracture-induced EMR remains unclear. Clarifying the generation of coal fracture-induced charge is essential as it underpins EMR's physical basis. This study employs a novel micro-loading machine coupled with atomic force microscope (AFM) to in-situ characterize the continuous evolution of coal micro-surface potential during loading. Results show that coal micro-surface topography exhibits load-dependent fluctuations and localized deformations, with shift along the loading direction reaching the micron scale. Local micro-surface potentials undergo transfer and redistribution, with tens of millivolt-scale staggered variations at various scanning points. The mean surface potential (average electricity) of each coal in the same region exhibits distinct changing trends, showing no clear linear relationship with the load. The analysis reveals that the micro-surface pores of coal facilitate the storage of charges, and the charged functional groups and carriers on the micro-surface also serve as important sources of charges. Non-uniform deformation of the micro-surface during loading induces the non-uniform movement of charge. Additionally, the activation of dormant carriers and the piezoelectric effect also contribute to complex changes in the micro-surface potential throughout the loading process. Due to the heterogeneity of coal and the property difference in various coals, micro-surface potential responses to load are non-linear and vary significantly across coal types. The experimental results demonstrate the persistence of charge on the coal surface during loading and its accumulation during fracturing, forming the physical basis for EMR's generation. These findings further clarify the electrical source of EMR and provide new equipment for revealing the mechanism of EMR.</div></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"241 ","pages":"Article 105853"},"PeriodicalIF":2.2,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of magnetic proxies for characterizing black carbon contamination of urban soil in Xuzhou, China","authors":"Yinghong Liu ,&nbsp;Xuesong Wang ,&nbsp;Na Li ,&nbsp;Menghui Yang ,&nbsp;Xijie Wang","doi":"10.1016/j.jappgeo.2025.105851","DOIUrl":"10.1016/j.jappgeo.2025.105851","url":null,"abstract":"<div><div>Black carbon (BC) pollution significantly impacts urban soil ecosystems and public health, highlighting the need to systematically evaluate its concentration gradients, spatial distribution, and emission sources. To address this, a dual-layer soil investigation was conducted in Xuzhou, a representative Chinese industrial city. A total of 142 topsoil samples from 71 sites (with one sample taken from the 0–2 cm layer and another from the 3–10 cm layer at each site) was collected. The mean BC concentrations were 17.12 g·kg⁻¹ and 11.90 g·kg⁻¹ for the 0–2 cm and 3–10 cm layer soils, respectively, reflecting 4.5 and 3.1 times the background levels. These findings indicate significant contamination from anthropogenic sources in the urban soils of Xuzhou. Particle size fractionation experiments showed preferential BC enrichment in coarse soil fractions. Environmental magnetic analysis indicated elevated magnetic susceptibility (χ) in urban soils, with ferrimagnetic minerals primarily occurring as coarse-grained particles, further evidencing human-induced inputs. Correlation analysis validated significant relationships between BC concentrations and magnetic parameters. These strong correlations establish magnetic parameters as reliable proxies for BC monitoring. The integration of geochemical and magnetic techniques offers an efficient framework for assessing BC contamination and mapping polluted areas in urban soils. Scanning electron microscopy (SEM) observations identified anthropogenic spherical magnetic particles. Geospatial mapping revealed overlapping distributions between BC and magnetic parameters (χ, SOFT, SIRM, χARM), with pollution hotspots concentrated along major roads and industrial areas. This spatial covariation confirmed shared sources of BC and magnetic minerals linked to transportation and industrial activities.</div></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"241 ","pages":"Article 105851"},"PeriodicalIF":2.2,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}