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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Geopersia
- نوع مقاله: Journal Article
- کلمات کلیدی: Seismic facies analysis,seismic attributes,fuzzy c-means,Gustafson Kessel,Adaptive Neuro-Fuzzy Inference Systems (ANFIS)
- چکیده:
- چکیده انگلیسی: Pattern recognition on seismic data is a useful technique for generating seismic facies maps that capture changes in the geological depositional setting. Seismic facies analysis can be performed using the supervised and unsupervised pattern recognition methods. Each of these methods has its own advantages and disadvantages. In this paper, we compared and evaluated the capability of two unsupervised methods Fuzzy c-means (FCM) and Gustafson Kessel (GK) and one supervised method Adaptive Neuro-Fuzzy Inference Systems (ANFIS) at revealing the presence of a channel system. The process is performed in an interactive scheme in the SeisART software to obtain the best output. The seismic facies analysis was conducted on a 3D seismic data set acquired at North Sea block F3. Based on the results, the GK method outperformed the other two methods in delineating the channel pattern.
- انتشار مقاله: 28-05-1396
- نویسندگان: Saeed Hadiloo,Saeid Mirzaei,Hosein Hashemi,Bijan Beiranvand
- مشاهده
- جایگاه : پژوهشی
- مجله: Geotechnical Geology
- نوع مقاله: Journal Article
- کلمات کلیدی: modeling,Electrical conductivity,Airborne Electromagnetic,Underground Structures
- چکیده:
- چکیده انگلیسی: Investigating the possibility of detection of the concealed military structures is one of the complicated problems. This structures is created a significant conductivity in opposite of the earth which can be detected using electromagnetic method. Airborne electromagnetic method is considered as an important geophysical method that is used in the airborne survey. This method is characterized by high speed, extensive coverage, cost-effective and performance capabilities for implementation in sever topographical relief. In this paper, we used electromagnetic data to solve the problem. In order to analyze this problem, both forward and inverse problems are treated in this contribution. In the forward problem, with the assumption of the known size and position of the structure, secondary magnetic field signal is modeled. Then, using the modeled signals, some points about the detectability of the structures are discussed. Finally, both of the forward and inverse problems are implemented based on simulated data and some suggestions are made to decrease the probability of detectability of the underground military targets.
- انتشار مقاله: 03-06-1399
- نویسندگان: Mohammad Mohammadzadeh-Moghaddam,Mohammadreza Saif,Davud Rajabi,Saeid Mirzaei
- مشاهده
- جایگاه : پژوهشی
- مجله: Geopersia
- نوع مقاله: Journal Article
- کلمات کلیدی: Seismic facies analysis,seismic attributes,fuzzy c-means,Gustafson Kessel,Adaptive Neuro-Fuzzy Inference Systems (ANFIS)
- چکیده:
- چکیده انگلیسی: Pattern recognition on seismic data is a useful technique for generating seismic facies maps that capture changes in the geological depositional setting. Seismic facies analysis can be performed using the supervised and unsupervised pattern recognition methods. Each of these methods has its own advantages and disadvantages. In this paper, we compared and evaluated the capability of two unsupervised methods Fuzzy c-means (FCM) and Gustafson Kessel (GK) and one supervised method Adaptive Neuro-Fuzzy Inference Systems (ANFIS) at revealing the presence of a channel system. The process is performed in an interactive scheme in the SeisART software to obtain the best output. The seismic facies analysis was conducted on a 3D seismic data set acquired at North Sea block F3. Based on the results, the GK method outperformed the other two methods in delineating the channel pattern.
- انتشار مقاله: 28-05-1396
- نویسندگان: Saeed Hadiloo,Saeid Mirzaei,Hosein Hashemi,Bijan Beiranvand
- مشاهده
- جایگاه : پژوهشی
- مجله: Geotechnical Geology
- نوع مقاله: Journal Article
- کلمات کلیدی: modeling,Electrical conductivity,Airborne Electromagnetic,Underground Structures
- چکیده:
- چکیده انگلیسی: Investigating the possibility of detection of the concealed military structures is one of the complicated problems. This structures is created a significant conductivity in opposite of the earth which can be detected using electromagnetic method. Airborne electromagnetic method is considered as an important geophysical method that is used in the airborne survey. This method is characterized by high speed, extensive coverage, cost-effective and performance capabilities for implementation in sever topographical relief. In this paper, we used electromagnetic data to solve the problem. In order to analyze this problem, both forward and inverse problems are treated in this contribution. In the forward problem, with the assumption of the known size and position of the structure, secondary magnetic field signal is modeled. Then, using the modeled signals, some points about the detectability of the structures are discussed. Finally, both of the forward and inverse problems are implemented based on simulated data and some suggestions are made to decrease the probability of detectability of the underground military targets.
- انتشار مقاله: 03-06-1399
- نویسندگان: Mohammad Mohammadzadeh-Moghaddam,Mohammadreza Saif,Davud Rajabi,Saeid Mirzaei
- مشاهده
- جایگاه : پژوهشی
- مجله: Addiction and Health
- نوع مقاله: Journal Article
- کلمات کلیدی: Harm reduction,Drug misuse,Drug and Narcotic Control,Drug dependence,Needle-exchange programs
- چکیده:
- چکیده انگلیسی: Background: Drug abuse is one of the main problems of human's life; thus communities have been thinking
about the solution of this problem. The present study aimed to compare the general features of drug abuse
treatment policies, war on drugs (WOD), and harm reduction (HR), in the selected countries.
Methods: The present study was a comparative and desk research that sought to compare context,
stewardship, financing, type of substance abuse treatment services, reasons of paradigm shift, and executive
challenges of treatment policies in the selected countries (China, Malaysia, Germany, Netherland, and Iran).
The necessary data for comparison of the countries were collected through valid databases, review of
documents, and reports of international organizations.
Findings: Context conditions were better in the HR countries. In most countries, the central government
played a key role in the stewardship, financing, and service providing. In WOD countries, the presence of
judicial structure was higher in the treatment of drug abuse. The policy-making approach was ideological in
WOD countries, but evidence-based in HR countries.
Conclusion: It seems that performance of HR countries is better than WOD countries.
- انتشار مقاله: 14-04-1398
- نویسندگان: Mohammad Hossein Mehrolhasani,Vahid Yazdi-Feyzabadi,Ahmad Hajebi,Saeid Mirzaei
- مشاهده