نتایج جستجو برای: geophysical technique

تعداد نتایج: 620629  

This work presents the application of a geostatistical-based modeling approach for building up electrical properties acquired from a geophysical electrical tomography survey deployed for the purpose of porphyry Cu exploration at the Takht-e-Gonbad deposit, in the central domain of Iran. Electrical data were inverted in 2D along several profiles across the main favorable zones of Cu-bearing mine...

2007
GUANGRONG SHEN APOSTOLOS SARRIS NIKOS PAPADOPOULOS

Shallow depth geophysical data from archaeological sites contain various levels and types of noise that hinters the valuable information of the subsurface architectural relics. Wavelet transform techniques were tested as a method for decomposition of the original geophysical data in order to eliminate the noise levels inherent to the geophysical measurements. In addition to the above, unsupervi...

2004
Frederick L. Paillet

Characterization of fractured-bedrock aquifers is one of the most difficult problems in hydrogeology. Successful characterization of aquifers at the site scale requires the effective integration of the three basic tools at our disposal: 1) surface geophysical soundings provide full non-destructive coverage of the aquifer volume but are generally ambiguous in interpretation and fail to identify ...

2012
S. Zwieback K. Scipal W. Dorigo

The validation of geophysical data sets (e.g. derived from models, exploration techniques or remote sensing) presents a formidable challenge as all products are inherently different and subject to errors. The collocation technique permits the retrieval of the error variances of different data sources without the need to specify one data set as a reference. In addition calibration constants can ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1389

growing demands and requires of high data rate systems cause significant increase of high frequency systems for wideband communication applications. as mixers are one of the main blocks of each receivers and its performance has great impact on receiver’s performance; in this thesis, a new solution for ku-band (12-18 ghz) mixer design in tsmc 0.18 µm is presented. this mixer has high linearity a...

This work aims at figuring out the spatial relationships between the geophysical and geological models in a case study pertaining to copper-sulfide mineralization through an integrated 3D analysis of favorable target. The Ghalandar Skarn-Porphyry Cu Deposit, which is located in NW Iran, is selected for this research work. Three geophysical surveys of direct current electrical resistivity and in...

1997
Ted Zhihong Yu Edwin Hsing-Mean Sha Nelson L. Passos Roy Dz-Ching Ju

Multi-dimensional systems containing nested loops are widely used to model scientific applications such as image processing, geophysical signal processing and fluid dynamics. However, branches within these loops may degrade the performance of pipelined architectures. This paper presents the theory, supporting hardware and experiments of a novel technique, based on multi-dimensional retiming, fo...

Journal: :Acta geodaetica et geophysica 2023

Abstract This paper presents the results of research and analyses related to development a new quasigeoid model fitted GNSS/levelling data for area Poland (PL-geoid2021). The was determined employing two procedures based on Geophysical Gravity Inversion technique (GGI method): procedure A consisted determination gravimetric in first step its subsequent fitting second step, B one-step data. Both...

Journal: :journal of seismology and earthquake engineering 0
mansour behtaj international institute of earthquake engineering and seismology mostafa allamehzadeh international institute of earthquake engineering and seismology gholam reza jafari shahid beheshti university

the aim of this work is to understand the relation between time and place that an earthquake takes place. in order to answer this question, the modified level crossing (mlc) technique has been implemented. by studying two earthquakes, one in iran and one in california we came to the conclusion that there is a relation between time and place of an earthquake occurrence. as a matter of fact, this...

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