The paper presents a new data inversion technique for the transient electromagnetic method (TEM) by converting measured signals into frequency domain. involves search such earth model parameters that there is consistency between synthetic and field data. We use an optimization method, where through numerical simulation at each iteration are determined in accordance with changing parameters. Num...

Abstract Synthesizing controllers directly from frequency-domain measurement data is a powerful tool in the linear time-invariant framework. Ever-increasing performance requirements necessitate extending these approaches to account for plant variations. The aim of this paper develop analysis and synthesis conditions local internal stability H∞-performance single-input single-output parameter-va...

The helicopter-borne electromagnetic (HEM) frequency-domain exploration method is an airborne electromagnetic (AEM) technique that is widely used for vast and rough areas for resistivity imaging. The vast amount of digitized data flowing from the HEM method requires an efficient and accurate inversion algorithm. Generally, the inverse modelling of HEM data in the first step requires a precise a...

The purpose of this study is to determine geochemical anomalies on lithogeochemical data from Ardestan area, Central Iran, using concentration-number (C-N) fractal modeling and staged factor analysis. Staged factor analysis is used to the recognition of genetic correlation and elimination of non-indicator elements in three steps. Factor scores of elements were calculated and geochemical data cl...