回歸分析在分離疊加磁異常中的應(yīng)用研究
[Abstract]:In this paper, based on the theory of optimal linear filtering, the frequency response characteristics of the two kinds of filtering, matching filtering and Wiener filtering in the data processing of the magnetic measurement data are compared and compared, and the matching filtering is only a special case of general Wiener filtering. In the 21st century of the height development of the information technology, the electronic computing technology has developed rapidly, and the application of frequency domain filtering technology is increasing in the data processing of the heavy magnetic data at home and abroad. It is well known that the magnetic anomaly data measured by our measurement is an integrated reflection of the detected object, that is, the comprehensive reflection of the abnormal superposition of different buried deep magnetic geological bodies, whether in the aeromagnetic measurement or in our ground magnetic measurement. and the frequency spectrum of the deep source field is mainly concentrated in the low frequency section, and the shallow source field has strong middle and high frequency components. Depending on this feature of the spectrum, we can separate the field from the deep source and the local field that reflects the shallow source. First, according to the application example of the regression analysis, a corresponding regression analysis model is established, and by the experimental analysis of the model, the conclusion that the non-linear regression problem encountered in the superposition abnormal filtering process can be converted into a linear regression problem can be obtained, and the established regression analysis model is effective and feasible. Then, the plane characteristic and the profile characteristic of the magnetic field of the spherical and the second-degree horizontal cylinder are analyzed and analyzed. The plane contour line and the main section curve of a single regular magnetic anomaly body are obtained, and the corresponding relation between the characteristic point of the main section curve (such as the extreme point, the inflection point, the zero value point, etc.) and the center of the magnetic anomaly body, the center of the center on the ground projection point and the effective magnetization inclination angle are analyzed. on the basis of which, the characteristics of the plane contour line and the main section curve of the different buried deep magnetic sphere superposition model, the second-degree horizontal cylinder superposition model and the sphere-two-degree horizontal cylinder superposition model are further discussed, The characteristics of the abnormal curves of a single model and a superimposed composite model are compared and analyzed. and two different methods of filtering processing are carried out on the abnormal curve of the static T main section of the superposed combined model which is being played. In one embodiment, a Wiener filter or a matched filtering method is directly used for filtering processing according to the superposition of the abnormal curve of the main section of the IGT; the second filtering method is to introduce a regression analysis model in the process of filtering processing. Through the comparative analysis of the two methods, it is known that the filtering method introduced to the regression analysis method has better separation effect on the superposition field source. In the end, this method is applied to the measured data of the work area, and the abnormal separation and treatment are carried out on the measured section of the work area. The results show that the regression analysis method has a certain auxiliary effect on the superposition magnetic anomaly filtering and separation.
【學(xué)位授予單位】:成都理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:P631.2
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