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2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)最新文献

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Application of neural network and principal component analysis to GPR data 神经网络与主成分分析在探地雷达数据中的应用
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963854
M. F. Pantoja, Jesus B. Rodriguez, A. Bretones, C. M. de Jong, S. Garcia, R. Martín, D. Vieira
{"title":"Application of neural network and principal component analysis to GPR data","authors":"M. F. Pantoja, Jesus B. Rodriguez, A. Bretones, C. M. de Jong, S. Garcia, R. Martín, D. Vieira","doi":"10.1109/IWAGPR.2011.5963854","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963854","url":null,"abstract":"This communication presents a prediction algorithm for the detection of features in GPR-based surveys. Based on signal processing and soft-computing techniques, the coupled use of principal-component analysis and neural networks enables a definition of an efficient method for analyzing GPR electromagnetic data. Results for detecting features of geological layers demonstrate not only the accuracy of the predictions of the method but also the simple interpretation of its output through reconstructed images of the scenarios.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114597825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
3-D imaging of faults with directional borehole radar 定向钻孔雷达断层三维成像
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963897
S. Ebihara, H. Kawai, K. Wada
{"title":"3-D imaging of faults with directional borehole radar","authors":"S. Ebihara, H. Kawai, K. Wada","doi":"10.1109/IWAGPR.2011.5963897","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963897","url":null,"abstract":"This paper describes results of 3-D imaging of a fault in Nakatatsu mine, Japan, with the directional borehole radar. The receiving antenna in the radar is the coaxial-fed circular dipole array antenna. The array data are acquired in singlehole measurement with the antenna. We propose a method to construct 3-D images of a plane type reflector from the array data. A numerical example is given to verify the method. In this simulation, we generated the array data with the MoM modified for borehole radar. The field experiments were conducted to measure a fault in skarn with the directional borehole radar. We detected reflected waves from the faults, and constructed 3-D images of the fault.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121446856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Investigation of wideband Coaxial-Fed Circular dipole Array antenna in a Borehole 井内宽带同轴馈电环形偶极子阵列天线研究
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963844
S. Ebihara, Y. Wada
{"title":"Investigation of wideband Coaxial-Fed Circular dipole Array antenna in a Borehole","authors":"S. Ebihara, Y. Wada","doi":"10.1109/IWAGPR.2011.5963844","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963844","url":null,"abstract":"In this paper, we study the design of a Coaxial-Fed Circular dipole Array in a Borehole (CFCAB) for operating frequencies between 20 – 250 MHz. The CFCAB is used for directional borehole radar. In the antenna, there is a long conducting cylinder near the array elements, and scattered waves at the cylinder interfere with received waves in the array antenna. Utilizing the interference criterion, which was previously proposed, we found that the antenna works in the frequency band, when a total length of the cylinder is 40 cm. In order to verify the design, we conducted field experiments in granite, and confirmed that the antenna with the cylinder can correctly estimate the direction of arrival.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122178412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
The effect of scattering processes on high frequency ground penetrating radar surveys on impact melt breccia - Early results from an arctic field campaign at the Haughton impact structure, Devon Island, Canada 高频探地雷达探测对撞击熔融角砾岩散射过程的影响——来自加拿大德文岛Haughton撞击构造北极野外活动的早期结果
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963893
T. Unrau, G. Osinski, R. Pratt, K. Tiampo
{"title":"The effect of scattering processes on high frequency ground penetrating radar surveys on impact melt breccia - Early results from an arctic field campaign at the Haughton impact structure, Devon Island, Canada","authors":"T. Unrau, G. Osinski, R. Pratt, K. Tiampo","doi":"10.1109/IWAGPR.2011.5963893","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963893","url":null,"abstract":"A 3D ground penetrating radar (GPR) survey was performed at the Haughton impact structure, Devon Island, Canada over heterogeneous carbonate-dominated impact melt breccias. The survey location was chosen for the purpose of qualifying the effect of a scattering medium on the depth of useful imaging in the context of planetary exploration. This survey, and associated 2D, common mid-point (CMP) and error control surveys, show that the depth of penetration is less on the brecciated unit than desired despite the electrical suitability of the material to GPR.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"249 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122945082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Explicit consideration of measurement uncertainty during Bayesian inversion of dispersive GPR data 色散探地雷达数据贝叶斯反演中测量不确定性的明确考虑
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963840
J. Bikowski, J. van der Kruk, J. Huisman, H. Vereecken, J. Vrugt
{"title":"Explicit consideration of measurement uncertainty during Bayesian inversion of dispersive GPR data","authors":"J. Bikowski, J. van der Kruk, J. Huisman, H. Vereecken, J. Vrugt","doi":"10.1109/IWAGPR.2011.5963840","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963840","url":null,"abstract":"Thin layers in the shallow subsurface can act as waveguides and result in dispersive common midpoint (CMP) data. Recently developed algorithms, similar to those used for seismic Rayleigh inversion, are able to successfully solve the inversion problem and obtain values of the waveguide properties. Despite this progress made, parameter uncertainty has not yet been appropriately considered. In this study, we investigate the influence of measurement uncertainty on the final parameter values using a Markov Chain Monte Carlo scheme with synthetic and experimental data. Explicit consideration of measurement uncertainty increases the uncertainty of the inferred waveguide parameters, but improves the reliability of the parameter estimates. The results of this study advocate the use of an explicit definition of the measurement uncertainty in the likelihood function when inverting for waveguide properties.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126396676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Some possibilities and problems related to 2D linear inverse scattering algorithms on large scale GPR data 大尺度GPR数据二维线性逆散射算法的一些可能性和问题
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963864
R. Persico, J. Sala
{"title":"Some possibilities and problems related to 2D linear inverse scattering algorithms on large scale GPR data","authors":"R. Persico, J. Sala","doi":"10.1109/IWAGPR.2011.5963864","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963864","url":null,"abstract":"In this paper, we will focus on some possibilities but also some problems related to the application of a 2D linear inversion algorithm (based on the Born approximation) on large scale data. In particular, the problem of the limited size of the investigation domain is dealt with, and it will be shown that it represents not only a computational problem but can also have some relevance with regard to the quality of the overall achieved image. Experimental results related to both a two dimensional inversion and a two dimensional migration based procedure will be shown.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"94 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127288550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Methodology for automatic boundary layer detection using ground penetrating radar 用探地雷达自动探测边界层的方法
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963891
Tobias Mathiak, M. Kesting, L. Overmeyer, Veronika Gau
{"title":"Methodology for automatic boundary layer detection using ground penetrating radar","authors":"Tobias Mathiak, M. Kesting, L. Overmeyer, Veronika Gau","doi":"10.1109/IWAGPR.2011.5963891","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963891","url":null,"abstract":"Ground penetrating radars are used in many fields of application. A challenging task is the analysis and interpretation of measurement data wherefore nowadays mainly experts' help is necessary. In this paper an automatic boundary layer detection based on selective time-frequency analysis is proposed. Developed algorithms are tested on measurement data acquired with an integrated GPR system on a bucket wheel excavator in open cast mining.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121167969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Facies and development of a holocene barrier spit (southern Sylt/German North Sea) 全新世堰洲咀(南叙尔特/德国北海)的相与发育
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963874
Tanja Tillmann, Jürgen Wunderlich
{"title":"Facies and development of a holocene barrier spit (southern Sylt/German North Sea)","authors":"Tanja Tillmann, Jürgen Wunderlich","doi":"10.1109/IWAGPR.2011.5963874","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963874","url":null,"abstract":"The aim of this ongoing study is the detection and interpretation of shallow subsurface on the German North Sea islands Sylt and Amrum using geophysical and sedimentological data. The main focus of the investigation lies on the reconstruction of the geological development of the southern barrier spit of Sylt, and the northern part of Amrum during the Holocene. The sedimentary structure and architecture of these island spit systems were investigated through an integrated approach using ground-penetrating radar (GPR) and sedimentological analyses of shallow sediment cores. Maximum penetration depths to 350 ns TWT which correspond to approximate depths of 15 m were reached. GPR surveys were orientated in 2D and 3D survey geometries with individual profile lengths between 30 m and 5 km. The topographic data of the GPR transects were collected by using a differential GPS. Different standard processing steps were chosen to increase the signal-to-noise ratio and to improve resolution. Until now, a total of 38 km GPR transects have been collected on the islands of Sylt and Amrum. To link GPR results with sedimentological data, 7 vibracores that reach a depth of 8 m below the surface were drilled at selected positions along the radar profiles. The combination of cores and high-resolution GPR data allows a detailed facies analysis and provides new insights into the complicated sedimentary architecture of the barrier island of Sylt and Amrum. Sedimentary architecture and internal structure of variety coastal elements has led to the definition and interpretation of different coastal environments as well as leads to new theories about the development of both barrier island spits.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121676868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Use of frequency power law to link the results of two EM testing methods for the characterization of humid concretes 使用频率幂律将潮湿混凝土特性的两种电磁测试方法的结果联系起来
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963901
G. Villain, A. Ihamouten, Xavier Dérobert
{"title":"Use of frequency power law to link the results of two EM testing methods for the characterization of humid concretes","authors":"G. Villain, A. Ihamouten, Xavier Dérobert","doi":"10.1109/IWAGPR.2011.5963901","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963901","url":null,"abstract":"This paper deals with the EM characterization of hydraulic concrete for different water contents over a large frequency band. Two measurement methods are used: the capacitive technique and an EM coaxial cell. The aims of this paper are (1) to fit the dispersion curve of the complex permittivity obtained by the coaxial cell in order to extrapolate it on a larger frequency band and (2) to compare the model and experimental results at a frequency of 33 MHz. For the first step, fitting and extrapolation are performed by using the Jonscher's model with 4 parameters, which are validated with data from literature. Then in a second step, they are applied on dispersion curves which we measured on 6 different concrete mixes, at 4 different water contents. Finally, the experimental results obtained by the capacitive technique are analyzed and compared to the real part of the fitted complex permittivity at 33 MHz.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122062038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Join global inversion of GPR and P-wave seismic traveltimes using particle swarm optimization 利用粒子群优化方法结合GPR和p波地震走时的全球反演
2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR) Pub Date : 2011-06-22 DOI: 10.1109/IWAGPR.2011.5963884
J. Tronicke, H. Paasche, Urs Boniger
{"title":"Join global inversion of GPR and P-wave seismic traveltimes using particle swarm optimization","authors":"J. Tronicke, H. Paasche, Urs Boniger","doi":"10.1109/IWAGPR.2011.5963884","DOIUrl":"https://doi.org/10.1109/IWAGPR.2011.5963884","url":null,"abstract":"Particle swarm optimization (PSO) is a relatively new global optimization approach inspired by the social behavior of birds and fishes. Although this approach has proven to provide excellent convergence rates in different optimization problems, it has seldom been used in geophysical inversion. Here, we propose a PSO-based inversion strategy to jointly invert GPR and P-wave seismic traveltimes from co-located crosshole experiments. Using a synthetic data example, we demonstrate the potential of our approach. Comparing our results to the input models as well as to velocity models found by separately inverting the data using a standard linearized inversion approach, illustrates the benefits of using an efficient global optimization approach for such a joint inversion problem. These include a straightforward appraisal of uncertainty, non-uniqueness, and resolution issues as well as the possibility of an improved and more objective interpretation.","PeriodicalId":130006,"journal":{"name":"2011 6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130637774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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