The Definition of Apparent Resistivity in Magnetotelluric Sounding

2014 ◽  
Vol 962-965 ◽  
pp. 189-192
Author(s):  
Bao Sheng Huang ◽  
Guo Xiang Yan
Keyword(s):  
Theoretical Calculation ◽  
Model Calculation ◽  
Imaginary Part ◽  
Apparent Resistivity ◽  
Calculation Formula ◽  
Practical Application ◽  
The Real ◽  
Calculation Results ◽  
Definition Of ◽  
Different Characteristics

Different apparent resistivity exists many different characteristics, such as in terms of the speed of tending to real resistivity, the strength of oscillation sexual and the resolution. Aimed at the problem of how to select apparent resistivity in magnetotelluric (MT), this paper compares and analyzes the characteristics of different apparent resistivity in reflecting underground electrical structure by theoretical calculation formula and model calculation, and then summarizes the advantage and disadvantage of different apparent resistivity. The calculation results of several typical geoelectric models show that Basukur apparent resistivity is the best definition method of apparent resistivity, followed in turn, from good to bad, is the apparent resistivity defined by the real part of impedance, discount apparent resistivity, Cagniard apparent resistivity and the apparent resistivity defined by the impedance square module and the apparent resistivity defined by the imaginary part of impedance square, and the apparent resistivity defined by the imaginary part of impedance is the worst. this conclusions provide the judgment basis for practical application.

scholarly journals On some properties of determinants with complex elements and their practical application

2021 ◽  
pp. 67-77
Author(s):  
Mykhailo Fys ◽  
Roman Kvit ◽  
Tetyana Salo
Keyword(s):  
Closed Form ◽  
Imaginary Part ◽  
Complex Numbers ◽  
System Of Equations ◽  
Order Complex ◽  
Symmetric Polynomials ◽  
Practical Application ◽  
The Real ◽  
The Given ◽  
Selection Of

The formulas presented in this paper make it possible to select the real and imaginary part of the determinant value of the n -th order complex quantity, greatly simplifying the process of its deployment. Moreover, its module is given by the determinant of the 2n -th order, the elements of which are the real and imaginary parts of complex numbers. This makes it possible to analyze analytically the process described using determinants with complex numbers. The real and imaginary parts are also determined by the sum of determinants already with n rows and columns, the elements of which make up complex elements. The terms of this sum are solutions of a system of equations represented in closed form using symmetric polynomials, the arguments of which are its coefficients. Part of this combination is expressed by two determinants of the n -th order, the elements of which are the sum and difference of the real and imaginary parts of the elements. This significantly reduces the number of arithmetic operations during the deployment of a complex determinant and the selection of its real and imaginary parts. The given numerical example confirms the feasibility of this approach.

scholarly journals Improved soil plug height calculation formula

2021 ◽  
pp. 121
Author(s):  
Keyword(s):  
Theoretical Calculation ◽  
Balance Equation ◽  
Vertical Direction ◽  
Calculation Formula ◽  
Force Analysis ◽  
Soil Plug ◽  
Pipe Pile ◽  
Calculation Results ◽  
Open Pipe ◽  
Multiple Units

This paper analyzes the soil plugging effect of the open pipe pile during the pile sinking process. The soil in the pipe pile is regarded as a continuous and uninterrupted multiple units, and the force analysis is carried out in the vertical direction, and the vertical balance equation of the soil in the pile is obtained. By establishing an equation, the expression of the plug height of the pipe pile during the pile sinking process is obtained. Comparing the theoretical calculation results with the actual project, it is concluded that the theoretical calculation results can reflect the overall change in the height of the soil plug. Therefore, the pile plug height obtained by calculation has certain guiding significance for the project.

The effect of layering on the definition of aquifer dispersivity

2007 ◽  
Vol 7 (3) ◽  
pp. 17-24
Author(s):  
M. Dimkić ◽  
M. Pušić ◽  
M. Jordanovski
Keyword(s):  
Model Calculation ◽  
Variable Coefficient ◽  
Filtration Rate ◽  
Layered Medium ◽  
Alluvial Sediments ◽  
Calculation Results ◽  
Model Size ◽  
Horizontal Heterogeneity ◽  
Definition Of

When analyzing solute transport in groundwater, it is necessary to introduce a variable coefficient of dispersion. It has been established that dispersion is affected by the medium, filtration rate and the size of the area. It has also been determined that an increasing travel distance increases the value of the coefficient of dispersion in the model/calculation applied. Horizontal heterogeneity and vertical layering of an aquifer make the definition of dispersion more difficult. This is particularly true of alluvial sediments, where sedimentation occurs under varying conditions and results in layering within a single lithofacial unit. In the analysis of substance migration through a layered aquifer using the conventional dispersion equation, a model of the hydraulically equivalent homogeneous aquifer was applied, including the concepts of hydraulically equivalent aquifer and coefficient of equivalent geometric dispersivity. This procedure is often applied in practice. Calculation results indicate that if a real layered aquifer is substituted in this manner by an equivalent homogeneous aquifer, it is necessary to increase dispersivity with increasing model size, in order to achieve calibration. It was concluded that increasing transverse dispersion in a layered medium increases the possibility of an effective substitution of a real multi-layered aquifer by an equivalent homogeneous aquifer. The justifiability of this approach should be evaluated for every case study.

The Development of Forgiveness

2020 ◽  
pp. 401-418
Author(s):  
Robert D. Enright ◽  
Jacqueline Y. Song
Keyword(s):  
Necessary Conditions ◽  
Practical Application ◽  
Important Work ◽  
Future Directions ◽  
Developmental Progression ◽  
Forgiveness Education ◽  
Cognitive Work ◽  
Adolescents And Adults ◽  
Forgiveness Therapy ◽  
Definition Of

The psychology of forgiveness originated from the creative and important work on the development of justice initiated by Piaget in 1932 and extended by Kohlberg in 1969. The scientific study of forgiveness is quite new, having emerged in print in 1989, with an examination of the developmental progression in children’s, adolescents’, and adults’ thinking about the necessary conditions for them to offer forgiveness to another person. In this chapter, the authors first review the definition of forgiveness, followed by this early cognitive work. They then turn to a discussion of the measurement of forgiveness correlates of forgiveness. The practical application of this construct is seen in the development of forgiveness therapy and forgiveness education, which the authors discuss in light of the empirical findings. Future directions for forgiveness studies are considered.

scholarly journals Characteristics Analysis and Modelling of a Pneumatic Underwater Launching System

2018 ◽  
Vol 232 ◽  
pp. 02005
Author(s):  
Bin Li ◽  
Song Guo ◽  
Wei Li ◽  
Deman Zhang ◽  
Nei Wang
Keyword(s):  
Theoretical Calculation ◽  
Calculation Formula ◽  
Numerical Work ◽  
Characteristics Analysis ◽  
Hydrodynamic Noise

Comprehensive characteristics of a pneumatic underwater launching system were analyzed and the simulation was carried out by simulink. The components of the pneumatic underwater launching system were introduced, and the theoretical calculation formula for the system was derived. A rated pressure of 3.5MPa and 5MPa was offered in the numerical work. Analyses in different piston height show good behaviors: Proper increase of piston-initial accumulator pressure is beneficial to reduce hydrodynamic noise, choose the appropriate pressure of accumulator. The hydrodynamic noise of the system can be significantly reduced by optimizing the structure of the double-acting cylinder, increasing the height of the piston and improving the structure of the piston.

A TRI‐POTENTIAL METHOD OF RESISTIVITY PROSPECTING

Geophysics ◽  
1956 ◽  
Vol 21 (2) ◽  
pp. 455-469 ◽  
Author(s):  
E. W. Carpenter ◽  
G. M. Habberjam
Keyword(s):  
Apparent Resistivity ◽  
Potential Method ◽  
Electrode Configuration ◽  
Practical Application ◽  
Resistivity Method

This paper describes a method whereby three resistances are measured for a four electrode configuration, and relations between these three resistances and their corresponding apparent resistivities are derived. The practical application of the resistance relation as a means of detecting observational and instrumental errors is indicated. The concept of apparent resistivity is examined and by means of examples it is shown that the apparent resistivity can take negative values. Finally, the possibility of using the triple resistivity method as a means of distinguishing between the effects of lateral and vertical resistivity changes on depth probes is discussed.

Assessment of Certainty of Ventilation Processes Mathematical Modeling

2015 ◽  
Vol 725-726 ◽  
pp. 1255-1260
Author(s):  
Tamara Daciuk ◽  
Vera Ulyasheva
Keyword(s):  
Mathematical Modeling ◽  
Turbulent Flows ◽  
Turbulence Models ◽  
Field Measurements ◽  
Heat Emission ◽  
Emission Sources ◽  
Wide Range ◽  
Calculation Results ◽  
Definition Of ◽  
Semiempirical Models

Numerical experiment has been successfully used during recent 10-15 years to solve a wide range of thermal and hydrogasodynamic tasks. Application of mathematical modeling used to design the ventilation systems for production premises characterized by heat emission may be considered to be an effective method to obtain reasonable solutions. Results of calculation performed with numerical solution of ventilation tasks depend on turbulence model selection. Currently a large number of different turbulence models used to calculate turbulent flows are known. Testing and definition of applicability limits for semiempirical models of turbulence should be considered to be a preliminary stage of calculation. This article presents results of test calculations pertaining to thermal air process modeling in premises characterized by presence of heat emission sources performed with employment of different models of turbulence. Besides, analysis of calculation results and comparison with field measurements data are presented.

scholarly journals Imagology of Iranians in One Thousand Nights and One Night

2016 ◽  
Vol 4 (1) ◽  
pp. 74
Author(s):  
Ehsan Ghabool ◽  
Mina Ravansalar
Keyword(s):  
Comparative Literature ◽  
Literary Work ◽  
Real Image ◽  
Economic Prosperity ◽  
Literary Works ◽  
Arabic Translation ◽  
The Real ◽  
Similarities And Differences ◽  
Definition Of

Imagology is a branch of comparative literature which explores the image of one nation in the literature of another nation. One Thousand Nights and One Night is among the important books which can show the image of different nations and people such as Indians, Iranians and Arabs. Since the oldest version of the book is in Arabic, it is considered an Arabic literary work though it was translated from a Persian tale in the first place. On this basis the study of the image of Iranians in One Thousand Nights and One Night can be included under the definition of imagology. In this article, first we explain, analyze and study the image of Iranians in the book One Thousand Nights and One Night with respect to 1. anthropology (including entertainments, personification of animals, disapprobation of lies and betrayal of spouses), 2. religious and mythical beliefs (including the belief in daevas and jinnis, magic, fire-worshipping and similar plots), 3. politics (emphasizing the position of vizier and his family in government), 4. economics (emphasizing economic prosperity), then we will compare the collected information with the image of Iranians in credited works and in this way we will identify the similarities and differences of Iranians’ image in One Thousand Nights and One Night and the above-said literary works. Finally we come to this conclusion that the similarities belong to the real image of Iranians in the pre-Islamic days and that differences show the image of post-Islamic Iran which is added through Arabic translation.

scholarly journals Some remarks on incomplete gamma type function γ*(α, x_)

Filomat ◽  
2015 ◽  
Vol 29 (1) ◽  
pp. 125-131 ◽  
Author(s):  
Emin Özcağ ◽  
İnci Egeb
Keyword(s):  
Recurrence Relation ◽  
Real Line ◽  
Summable Function ◽  
Type Function ◽  
The Real ◽  
Definition Of ◽  
Derivatives Of

The incomplete gamma type function ?*(?, x_) is defined as locally summable function on the real line for ?>0 by ?*(?,x_) = {?x0 |u|?-1 e-u du, x?0; 0, x > 0 = ?-x_0 |u|?-1 e-u du the integral divergining ? ? 0 and by using the recurrence relation ?*(? + 1,x_) = -??*(?,x_) - x?_ e-x the definition of ?*(?, x_) can be extended to the negative non-integer values of ?. Recently the authors [8] defined ?*(-m, x_) for m = 0, 1, 2,... . In this paper we define the derivatives of the incomplete gamma type function ?*(?, x_) as a distribution for all ? < 0.

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