scholarly journals Fault and horizon automatic interpretation by CNN: a case study of coalfield

2020 ◽  
Vol 17 (6) ◽  
pp. 1016-1025
Author(s):  
Yinling Guo ◽  
Suping Peng ◽  
Wenfeng Du ◽  
Dong Li
Keyword(s):  
Seismic Data ◽  
Seismic Interpretation ◽  
Seismic Exploration ◽  
Automatic Interpretation ◽  
Manual Intervention ◽  
History Of ◽  
Model Training ◽  
The Relationship ◽  
3D Seismic Data

Abstract A convolutional neural network (CNN) is a powerful tool used for seismic interpretation. It does not require manual intervention and can automatically detect geological structures using the pattern features of the original seismic data. In this study, we presented the development history of seismic interpretation and the application of CNN in seismic exploration. We proposed a set of CNN prediction methods and processes for coalfield seismic interpretation and realised automatic interpretation of faults and horizons based on the relationship between faults and horizons. We defined a CNN model training method based on structural geological modelling, which allowed rapid and accurate establishment of fault and horizon labels by using structural modelling. We used two examples to verify the accuracy of the algorithm, one to test for synthetic 3D seismic data and one to test for real coalfield seismic data. The results showed that CNNs can effectively predict both faults and horizons at the same time and has high accuracy. Thus, CNNs are potentially novel interpretation tools for coalfield seismic interpretation.

scholarly journals Connecting Reproductive Rights, Democracy, and the Rule of Law: Lessons from Poland in Times of COVID-19

2021 ◽  
Vol 22 (6) ◽  
pp. 1072-1097
Author(s):  
Atina Krajewska
Keyword(s):  
Rule Of Law ◽  
Reproductive Rights ◽  
The Rule Of Law ◽  
Abortion Law ◽  
Polish Society ◽  
History Of ◽  
Constitutional Tribunal ◽  
Litmus Test ◽  
The Relationship

AbstractThis article examines the relationship between reproductive rights, democracy, and the rule of law in transitional societies. As a case study, it examines the development of abortion law in Poland. The article makes three primary claims. First, it argues that the relationship between reproductive rights and the rule of law in Poland came clearly into view through the abortion judgment K 1/20, handed down by the Constitutional Tribunal in the middle of the COVID-19 pandemic. The judgment and the context in which it was issued and published are interpreted as reflections of deep-lying processes and problems in Polish society. Consequently, second, the article argues that analysis of the history of reproductive rights in recent decades in Poland reveals weak institutionalization of the rule of law. This is manifest in the ways in which different professional groups, especially doctors and lawyers, have addressed questions regarding abortion law. Therefore, third, the article argues that any assessment of the rule of law should take into account how powerful professional actors and organizations interact with the law. The Polish case study shows that reproductive rights should be seen as important parts of a “litmus test,” which we can use to examine the efficacy of democratic transitions and the quality of the democracies in which such transitions result.

Armenian prosody in typology and diachrony

2018 ◽  
Vol 8 (1) ◽  
pp. 108-133 ◽  
Author(s):  
Jessica DeLisi
Keyword(s):  
Historical Linguistics ◽  
Secondary Stress ◽  
Modern Language ◽  
Primary Stress ◽  
Prosodic Word ◽  
History Of ◽  
Final Syllable ◽  
The Relationship ◽  
Stress Patterns

AbstractThis paper examines the relationship between typology and historical linguistics through a case study from the history of Armenian, where two different stress systems are found in the modern language. The first is a penult system with no associated secondary stress ([… σ́σ]ω). The other, the so-called hammock pattern, has primary stress on the final syllable and secondary stress on the initial syllable of the prosodic word ([σ̀ … σ́]ω). Although penult stress patterns are by far more typologically common than the hammock pattern in the world’s languages, I will argue that the hammock pattern must be reconstructed for the period of shared innovation, the Proto-Armenian period.

Being black in Australia: a case study of intergroup relations

Race & Class ◽  
2008 ◽  
Vol 49 (4) ◽  
pp. 38-56 ◽  
Author(s):  
Val Colic-Peisker ◽  
Farida Tilbury
Keyword(s):  
Predominantly White ◽  
Race Relations ◽  
Intergroup Relations ◽  
Youth Violence ◽  
Economic Status ◽  
Racial Hierarchy ◽  
History Of ◽  
The Relationship ◽  
Two Populations

This article presents a case study in Australia's race relations, focusing on tensions between urban Aborigines and recently resettled African refugees, particularly among young people. Both of these groups are of low socio-economic status and are highly visible in the context of a predominantly white Australia. The relationship between them, it is argued, reflects the history of strained race relations in modern Australia and a growing antipathy to multiculturalism. Specific reasons for the tensions between the two populations are suggested, in particular, perceptions of competition for material (housing, welfare, education) and symbolic (position in a racial hierarchy) resources. Finally, it is argued that the phenomenon is deeply embedded in class and race issues, rather than simply in youth violence.

Evaluation of direct hydrocarbon indicators through comparison of compressional‐ and shear‐wave seismic data: a case study of the Myrnam gas field, Alberta

Geophysics ◽  
1985 ◽  
Vol 50 (1) ◽  
pp. 37-48 ◽  
Author(s):  
Ross Alan Ensley
Keyword(s):  
Shear Wave ◽  
Seismic Data ◽  
Compressional Wave ◽  
Bright Spot ◽  
Low Velocity ◽  
Gas Reservoir ◽  
Gas Field ◽  
Compressional Waves ◽  
The Relationship

Shear waves differ from compressional waves in that their velocity is not significantly affected by changes in the fluid content of a rock. Because of this relationship, a gas‐related compressional‐wave “bright spot” or direct hydrocarbon indicator will have no comparable shear‐wave anomaly. In contrast, a lithology‐related compressional‐wave anomaly will have a corresponding shear‐wave anomaly. Thus, it is possible to use shear‐wave seismic data to evaluate compressional‐wave direct hydrocarbon indicators. This case study presents data from Myrnam, Alberta which exhibit the relationship between compressional‐ and shear‐wave seismic data over a gas reservoir and a low‐velocity coal.

scholarly journals THE EGYPTIAN LABOR CORPS: WORKERS, PEASANTS, AND THE STATE IN WORLD WAR I

2017 ◽  
Vol 49 (1) ◽  
pp. 5-24 ◽  
Author(s):  
Kyle J. Anderson
Keyword(s):  
World War I ◽  
Human Resource ◽  
Rural Society ◽  
Resource Mobilization ◽  
World War ◽  
Colonial State ◽  
History Of ◽  
Dialectical Relationship ◽  
The Relationship

AbstractIn this article, I detail the British imperial system of human resource mobilization that recruited workers and peasants from Egypt to serve in the Egyptian Labor Corps in World War I (1914–18). By reconstructing multiple iterations of this network and analyzing the ways that workers and peasants acted within its constraints, this article provides a case study in the relationship between the Anglo-Egyptian colonial state and rural society in Egypt. Rather than seeing these as two separate, autonomous, and mutually antagonistic entities, this history of Egyptian Labor Corps recruitment demonstrates their mutual interdependence, emphasizing the dialectical relationship between state power and political subjectivity.

Random noise attenuation by planar mathematical morphological filtering

Geophysics ◽  
2018 ◽  
Vol 83 (1) ◽  
pp. V11-V25 ◽  
Author(s):  
Weilin Huang ◽  
Runqiu Wang
Keyword(s):  
Seismic Data ◽  
Signal To Noise Ratio ◽  
Random Noise ◽  
Seismic Exploration ◽  
Noise Attenuation ◽  
Seismic Waveforms ◽  
Morphological Filtering ◽  
Alternative Techniques ◽  
The Difference ◽  
The Relationship

Improving the signal-to-noise ratio (S/N) of seismic data is desirable in many seismic exploration areas. The attenuation of random noise can help to improve the S/N. Geophysicists usually use the differences between signal and random noise in certain attributes, such as frequency, wavenumber, or correlation, to suppress random noise. However, in some cases, these differences are too small to be distinguished. We used the difference in planar morphological scales between signal and random noise to separate them. The planar morphological scale is the information that describes the regional shape of seismic waveforms. The attenuation of random noise is achieved by removing the energy in the smaller morphological scales. We call our method planar mathematical morphological filtering (PMMF). We analyze the relationship between the performance of PMMF and its input parameters in detail. Applications of the PMMF method to synthetic and field post/prestack seismic data demonstrate good performance compared with competing alternative techniques.

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