Effect of Soil Composition on Complex Dielectric Properties PDF Download
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Author: John O. Curtis
Publisher:
ISBN:
Category : Dielectric measurements
Languages : en
Pages : 296
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Book Description
Author: John O. Curtis
Publisher:
ISBN:
Category : Dielectric measurements
Languages : en
Pages : 296
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
This report contains dielectric property measurement results for soils. The original data were collected in the form of the real and imaginary parts of the complex dielectric constant versus frequency utilizing a Hewlett-Packard 851 OC Vector Network Analyzer System with an S-Parameter Test Set and a coaxial sample holder. Software developed at the U.S. Army Engineer Waterways Experiment Station was used to convert S-parameter measurements at selected frequencies into a complex dielectric constant. The soils were assumed to be nonmagnetic. Other useful electromagnetic properties were calculated from the dielectric constant and frequency, including an equivalent electrical conductivity, the loss tangent, power attenuation, and a normalized phase velocity. The section entitled, "Fundamental Relationships," contains the formulae used to calculate these properties. Additional physical parameters of the soil samples that are included in the report include their dry density, volumetric moisture content, and temperature. Measurement results and calculated parameters are listed at four selected frequencies and displayed as a function of volumetric moisture content. The intent of presenting data in this way is to demonstrate the experimental observation that the real part of the dielectric constant, as well as the normalized phase velocity are strong functions of volumetric moisture and reasonably independent of soil texture. Other parameters are clearly dependent on soil texture, and, given enough data from several different types of soils, their graphs versus moisture content would show a great deal of scatter. The four frequencies chosen for data presentation span the range of frequencies normally associated with ground penetrating radars.
Author: Andrzej K. Jonscher
Publisher:
ISBN:
Category : Dielectrics
Languages : en
Pages : 124
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Author: Nikolai Bagdassarov
Publisher: Cambridge University Press
ISBN: 1108390196
Category : Science
Languages : en
Pages : 566
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Book Description
Rock physics encompasses practically all aspects of solid and fluid state physics. This book provides a unified presentation of the underlying physical principles of rock physics, covering elements of mineral physics, petrology and rock mechanics. After a short introduction on rocks and minerals, the subsequent chapters cover rock density, porosity, stress and strain relationships, permeability, poroelasticity, acoustics, conductivity, polarizability, magnetism, thermal properties and natural radioactivity. Each chapter includes problem sets and focus boxes with in-depth explanations of the physical and mathematical aspects of underlying processes. The book is also supplemented by online MATLAB exercises to help students apply their knowledge to numerically solve rock physics problems. Covering laboratory and field-based measurement methods, as well as theoretical models, this textbook is ideal for upper-level undergraduate and graduate courses in rock physics. It will also make a useful reference for researchers and professional scientists working in geoscience and petroleum engineering.
Author: Ellen C. Yu
Publisher:
ISBN:
Category :
Languages : en
Pages : 72
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Author: Allan J. Delaney
Publisher:
ISBN:
Category : Dielectric measurements
Languages : en
Pages : 20
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Author: Stuart Nelson
Publisher: Academic Press
ISBN: 012802545X
Category : Science
Languages : en
Pages : 292
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Book Description
Dielectric Properties of Agricultural Materials and Their Applications provides an understanding of the fundamental principles governing dielectric properties of materials, describes methods for measuring such properties, and discusses many applications explored for solving industry problems. The information in this reference stimulates new research for solving problems associated with production, handling, and processing of agricultural and food products. Anyone seeking a better understanding of dielectric properties of materials and application of radio-frequency and microwave electromagnetic energy for solution of problems in agriculture and related fields will find this an essential resource. Presents applications of dielectric properties for sensing moisture in grain and seed and the use of such properties in radio-frequency and microwave dielectric heating of agricultural materials Offers information for finding correlations between dielectric properties and quality attributes such as sweetness in melons, or other desired characteristics of agricultural products Identifies conditions for selective dielectric heating of materials such as insects in grain or biological organisms in soils Provides a solid understanding of dielectric properties and the variables that influence these properties
Author: Grigoriy I. Torgovnikov
Publisher: Springer Science & Business Media
ISBN: 3642774539
Category : Technology & Engineering
Languages : en
Pages : 208
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Book Description
Provided here is a comprehensive treatise on all aspects of dielectric properties of wood and wood products. The topics covered include: Interaction between electromagnetic field and wood. - Wood composition and dielectric properties of its components. - Measurement of dielectric parameters of wood.- Dielectric properties of oven-dry wood. - Dielectric properties of moist wood. - Effect of different kinds of treatment on dielectric properties of wood. - Dielectric properties of bark. - Dielectric properties of wood-based materials. - Recommendations for determination of dielectric parameters of wood based materials and for their use in calculations. Several appendices comprise reference data onthe dielectric characteristics of wood and wood-based materials in the wide range of frequencies, temperatures, and moisture content.
Author:
Publisher:
ISBN:
Category : Sabbatical year (Judaism)
Languages : en
Pages :
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Author: James Wang
Publisher:
ISBN:
Category : Microwaves
Languages : en
Pages : 44
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