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Design and Implementation of Two-dimensional Magnetotelluric Forward Software System

Author: WangXiChong
Tutor: HuPing；WangXuBen
School: Chengdu University of Technology
Course: Earth Exploration and Information Technology
Keywords: Magnetotelluric Two-dimensional modeling Forward calculation MFC SQLite Micro database
CLC: P631.325
Type: Master's thesis
Year: 2011
Downloads: 90
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Abstract


Magnetotelluric sounding method as an important exploration geophysical methods, widely used in groundwater exploration, engineering, exploration, exploration of marine resources and many other fields. Natural alternating electromagnetic field as a field source, through the observation of the electromagnetic field on the ground, underground different depths medium resistivity distribution of the information thus obtained. With the development of computer technology and magnetotelluric theoretical breakthrough method of magnetotelluric sounding data processing and interpretation experience from the amount of hand-board stage \Forward model and forward calculation We recognize that a variety of ground conditions magnetotelluric response characteristics of effective methods and means. Start from the two-dimensional screen modeling, trying to establish a set of magnetotelluric two-dimensional modeling and the forward calculation visualization software system. Accurate geological model, comparative study of different geological model forward calculation results can be summed up under different geological conditions of magnetotelluric distribution of data processing, inversion and interpretation of a positive role in guiding. The paper mainly discusses the magnetotelluric sounding two-dimensional forward modeling system framework of the software system, main functions, system implementation, and analysis of two-dimensional model of magnetotelluric response characteristics. MT2D forward software system consists of four modules: data management module, modeling module of a two-dimensional screen, forward module, mapping module. Data management module database management technology instead of the traditional hierarchical directory management model, which can more easily manage the data of each module, and several other functional modules of the system to provide data services; the traditional geological modeling means the transition from the drawing modeling to the computer using a text editor, and then manually using the keyboard, mouse visual modeling. The man-machine interactive two-dimensional visualization screen modeling, the module curve representation and polygonal region representation to achieve a variety of complex geological model of the fault, abnormal, and provides a quadrilateral subdivision analog terrain and encryption meshed better simulate complex geological models, 2D forward calculation to provide accurate forward model; forward module implements the the quadratic interpolation finite element mesh MT 2D modeling algorithm The algorithm forward calculation speed, good effect, high resolution; mapping module of the completion calculate the result of a variety of maps drawn forward. Using Visual C 6.0 as a development tool, the system interface, two-dimensional screen modeling and mapping module; the SQLite micro database management technology to achieve data management module; finite element mesh secondary FORTRAN language interpolation two-dimensional forward modeling algorithm; Mixed Programming of VC and Fortran language and the use of technology to achieve two-dimensional modeling carried forward calculation details, increase the flexibility of system development, improve the efficiency of the system. The final design and developed a set of Windows-based system visualization MT2D forward software system, the system interface is friendly, easy to operate, compared with the previous model calculations with the use, confirms the right of the system, the software system has more large value in use.

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Electrical prospecting > Method > Electromagnetic Method
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