Results 41 to 50 of about 41,227 (356)

Comprehensive analysis of correlations between soil electrical resistivity and index geotechnical properties

Results in Engineering
This study investigates the relationships between soil electrical resistivity and key geotechnical properties to develop predictive models for designing grounding systems in electrical substations.
Kornkanok Sangprasat, Avirut Puttiwongrak, Shinya Inazumi   +2 more
doaj   +1 more source

Soil Site Investigations Using 2D Resistivity Imaging Technique [PDF]

Engineering and Technology Journal, 2013
The use of 2D Electrical Resistivity Imaging (ERI) technique in combination with geotechnical and geological data allow the determination of the lithological composition and detailed internal architecture of the subsurface and understanding the ...
Hussein H. Karim, Mohammed A. Al-Neami, Wisam M. Y. Mohammad   +2 more
doaj   +1 more source

The influence of changes in water content on the electrical resistivity of a natural unsaturated loess [PDF]

, 2012
Non-destructive methods of measuring water content in soils have been extensively developed in the last decades, especially in soil science. Among these methods, the measurements based on the electrical resistivity are simple and reliable thanks to the ...
Cui, Yu Jun, Delage, Pierre, Munoz-Castelblanco, José, Pereira, Jean-Michel   +3 more
core   +3 more sources

Electrical permittivity and resistivity time lapses of multiphase DNAPLs in a lab test [PDF]

, 2014
Dense Non-Aqueous Phase Liquids (DNAPLs) induce variation in electromagnetic characteristics of the ground e.g. electric permittivity and resistivity.
Orlando, Luciana, Renzi, Beatrice
core   +2 more sources

Current Tracking Adaptive Control of Brushless DC Motors

International Journal of Adaptive Control and Signal Processing, EarlyView.
In this paper, the current tracking for Brushless Direct Current motors is approached considering uncertainty in the parameters of the motor's model. An adaptive control scheme to compensate electrical parameters uncertainty is proposed without requiring any knowledge of the mechanical parameters.
Fernanda Ramos‐García, Axel Coronado‐Andrade, Gerardo Espinosa‐Pérez, Luis Alvarez‐Icaza   +3 more
wiley   +1 more source

The Application of High-Density Resistivity Method in Organic Pollution Survey of Groundwater and Soil [PDF]

, 1929
The groundwater and soil of Nanjing 1211 Chemical Plant were investigated by the method of high-density resistivity after the plant closure. The results show that there are high resistance anomaly areas of aquifer and soil between 17 and 45 meters where ...
Jiang, Y., Li, Y., Yang, G., Zhou, X., Wu, J., Shi, X.   +5 more
core   +1 more source

Advancing Research on Biomaterials and Biological Materials with Scanning Electron Microscopy under Environmental and Low Vacuum Conditions

Advanced Engineering Materials, EarlyView.
Herein, environmental scanning electron microscopy (ESEM) is discussed as a powerful extension of conventional SEM for life sciences. By combining high‐resolution imaging with variable pressure and humidity, ESEM allows the analysis of untreated biological materials, supports in situ monitoring of hydration‐driven changes, and advances the functional ...
Jendrian Riedel, Lea Dierker, Antoine Eyram Kwame, Kim Nora Wagner, Jonas J. Unterholzner, Jan‐Henning Dirks, Dorothea Brüggemann   +6 more
wiley   +1 more source

Seasonal Frozen Soil Electrical Resistivity Estimation Based on Capillary Fractal Model

Water Resources Research
Frozen soil resistivity exhibits high sensitivity to temperature variations and ice‐water distribution. The conversion of soil water content (SWC) and resistivity based on petrophysical relationships enables the characterization of spatial distribution ...
Lige Bai, Jing Li, Tieyu Liu, Zhenjiao Jiang, Deqiang Mao   +4 more
doaj   +1 more source

Simplified conservative testing method of touch and step voltages by multiple auxiliary electrodes at reduced distance [PDF]

, 2015
Grounding systems (GSs) must be tested periodically in order to maintain the touch voltage (TV) and step voltage (SV) below a safe value in all of the zones of the installation.
Araneo, Rodolfo, Celozzi, Salvatore, Martirano, Luigi, Parise, Giuseppe, Parise, Luigi   +4 more
core   +1 more source

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source