Claim Missing Document
Check
Articles

Found 4 Documents
Search
Journal : Scientific Journal of Informatics

GRAV3D Validation using Generalized Cross-Validation (GCV) Algorithm by Lower Bounds Approach for 3D Gravity Data Inversion Adhi, Mochamad Aryono; Wahyudi, Wahyudi; Suryanto, Wiwit; Sarkowi, Muh
Scientific Journal of Informatics Vol 5, No 2 (2018): November 2018
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v5i2.16736

Abstract

The completion of gravitational data inversion results in a smooth recovered model. GRAV3D is one software that can be used to solve 3D inversion problems of gravity data. Nevertheless there are still fundamental problems related to how to ensure the validity of GRAV3D to be used in 3D inversion. One approach used is to use lower bounds as inversion parameters. In this study lower bounds are set from  to . The results obtained show that the use of lower bounds decreases resulting in a larger data misfit which means that the more data that meets the tolerance calculation, the better recovered model produced.
Inverse Modeling Using Taylor Expansion Approach and Jacobi Matrix on Magnetic Data (Dyke/Magma Intrusion Cases) Suprianto, Agus; Wahyudi, Wahyudi; Suryanto, Wiwit; Setiawan, Ari; Adhi, Aryono; Priyantari, Nurul; Supriyadi, Supriyadi; Subekti, Agus
Scientific Journal of Informatics Vol 6, No 2 (2019): November 2019
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v6i2.19798

Abstract

The mathematical modelling of geological structures, i.e. magma intrusion or dyke, has been done,  based on magnetic data with inversion techniques using MatLab. The magnetic equation is a non-linear equation, and completion is done using a linear approach to non-linear mathematical models of magnetic data using the Taylor expansion approach and Jacobi Matrix. The first step of this research is to make synthetic data forward modelling from the magnetic equation of magma intrusion or dyke cases without errors, and the next stepping then add errors to the data. The next step is to do an inversion to get the parameters sought, i.e. depth and angle of the magma intrusion, by giving initial guesses, and then re-correct iteratively until convergent results are obtained. Finally, parameters of slope dyke or thin magma intrusion and its depth can be determined. The results obtained indicate that this technique can be used to get physical parameters sought from magnetic data for simple geological cases, i.e. dyke and magma intrusion.
GRAV3D Validation using Generalized Cross-Validation (GCV) Algorithm by Lower Bounds Approach for 3D Gravity Data Inversion Adhi, Mochamad Aryono; Wahyudi, Wahyudi; Suryanto, Wiwit; Sarkowi, Muh
Scientific Journal of Informatics Vol 5, No 2 (2018): November 2018
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v5i2.16736

Abstract

The completion of gravitational data inversion results in a smooth recovered model. GRAV3D is one software that can be used to solve 3D inversion problems of gravity data. Nevertheless there are still fundamental problems related to how to ensure the validity of GRAV3D to be used in 3D inversion. One approach used is to use lower bounds as inversion parameters. In this study lower bounds are set from  to . The results obtained show that the use of lower bounds decreases resulting in a larger data misfit which means that the more data that meets the tolerance calculation, the better recovered model produced.
Inverse Modeling Using Taylor Expansion Approach and Jacobi Matrix on Magnetic Data (Dyke/Magma Intrusion Cases) Agus Suprianto; Wahyudi Wahyudi; Wiwit Suryanto; Ari Setiawan; Aryono Adhi; Nurul Priyantari; Supriyadi Supriyadi; Agus Subekti
Scientific Journal of Informatics Vol 6, No 2 (2019): November 2019
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sji.v6i2.19798

Abstract

The mathematical modelling of geological structures, i.e. magma intrusion or dyke, has been done,  based on magnetic data with inversion techniques using MatLab. The magnetic equation is a non-linear equation, and completion is done using a linear approach to non-linear mathematical models of magnetic data using the Taylor expansion approach and Jacobi Matrix. The first step of this research is to make synthetic data forward modelling from the magnetic equation of magma intrusion or dyke cases without errors, and the next stepping then add errors to the data. The next step is to do an inversion to get the parameters sought, i.e. depth and angle of the magma intrusion, by giving initial guesses, and then re-correct iteratively until convergent results are obtained. Finally, parameters of slope dyke or thin magma intrusion and its depth can be determined. The results obtained indicate that this technique can be used to get physical parameters sought from magnetic data for simple geological cases, i.e. dyke and magma intrusion.
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Basit Achmad, Rahim Adhatus Solichah Ahmadiyah, Adhatus Solichah Agung Harijoko Agus Subekti Agus Subekti Agus Suprianto Ahmad Fauzi Pohan Amelia, Risky Nuri ARI SETIAWAN Ari Setiawan Ari Setiawan Ari Setiawan Aryono Adhi, Aryono Aswan, Marwis Ayu Putri Ningsih Ayu Putri Ningsih Azka Zakiyyatuddin Boko Nurdiyanto Dairoh Dairoh, Dairoh Daryono, Mudrik Rahmawan Doni Prakasa Eka Putra Drajat Ngadmanto Dwa Desa Warnana Ellianawati, Ellianawati Estuning Tyas Wulan Mei Fauzi, Hendra Harmadi Harmadi Helmi Yusnaini Helmi Yusnaini Hendra Fauzi Herlan Darmawan Herlan Darmawan Hesti Hesti Hesti Hesti Hiroyuki Hashiguchi Hiroyuki Hashiguchi Imam Suyanto Irwan Meilano irwan meilano Irzaman, Irzaman Jaingot A. Parhusip Jaingot A. Parhusip, Jaingot A. Jamidun, Jamidun Maria Evita Maria Evita Marzuki Marzuki Mitra Djamal Mitra Djamal Moh Yasin Mohammad Yasin Muh Sarkowi Muhammad Rusydi H. Mutya Vonnisa Nina Siti Aminah Nina Siti Aminah Nurul Priyantari P, Subagio P. Perdinan Palgunadi, Kadek Hendrawan Pupung Susilanto Putra, Heriansyah Rais Ramdani Salam Ravidho Ramadhan Ravidho Ramadhan Retna Apsari Rian Amukti Rohima Wahyu Ningrum Rohima Wahyu Ningrum, Rohima Wahyu Ry, Rexha Verdhora SB, Kirbani Sensius Seno Sholihun, Sholihun Simanjuntak, Andrean Vesalius Hasiholan Sirait, Anne Meylani Magdalena Sismanto Sismanto Sri Widiyantoro Suliyanti Pakpahan Supriyadi Supriyadi Supriyadi Supriyadi Syaifuddin, Firman Syarifatul Ulfah Taib, Suryani Toyoshi Shimomai Toyoshi Shimomai Triahandini, Agnis Very Kurnia Bakti, Very Kurnia Wahidin, Nurhalis Wahyu Srigutomo Wahyu Srigutomo Wahyudi Wahyudi Wahyudi Wahyudi Wahyudi Wahyudi Wahyudi Wahyudi Wahyudi Wahyudi Wahyudi Wahyudi