Results 11 to 20 of about 375,603 (219)

Seepage test by HCA for remolded kaolin [PDF]

E3S Web of Conferences, 2019
Permeability is an import character of soil, especially in excavation and tunnelling. Hollow cylindrical apparatus (HCA) is often used to determine soil anisotropy, particularly soil strength and stiffness under different directions of major principal ...
Zhou Jian, Xu Jie, Luo Linghui, Yu Lianggui, Gong Xiaonan   +4 more
doaj   +1 more source

A Complex Network Model for Analysis of Fractured Rock Permeability

Advances in Civil Engineering, 2020
Fractured rocks exist widely in nature. The fracture network is an effective storage space and main seepage channel of low-permeability oil and gas reservoirs, which controls the seepage system of low-permeability oil and gas reservoirs.
Xinmin Zhu, Guannan Liu, Feng Gao, Dayu Ye, Jixi Luo   +4 more
doaj   +1 more source

Electromagnetic Wave Absorption Properties of Cation-Substituted Ba_0.5Sr_0.5Zn_2−xMe_xFe₁₆O₂₇ (Me = Fe, Ni, Co, Cu, Mn) W-Type Hexagonal Ferrites

Applied Sciences
W-type hexaferrites with compositions Ba0.5Sr0.5Zn2-xMexFe16O27 (Me = Fe, Ni, Co, Cu, Mn; x = 1) and Ba0.5Sr0.5Zn2−xMnxFe16O27 (x = 0–2.0) were synthesized via solid-state reaction and optimized using a two-step calcination process to obtain single-phase
Jae-Hee Heo, Young-Min Kang
doaj   +1 more source

Improvement in Structural Dielectric and Magnetic Properties of Barium Hexaferrite Nanoparticles by Doping Zinc Ions for Microwave Absorption Application

IEEE Access
Nanotechnology has become visible as one of the most climacteric and expeditiously advancing research areas. Scientific researchers have recently given a demonstration of keen and undivided attention in nanoparticles ferrites.
Abdul Karim, Iftikhar Hussain Gul
doaj   +1 more source

AC-Winding-Resistance Calculation of Toroidal Inductors with Solid-Round-Wire and Litz-Wire Winding Based on Complex Permeability Modeling

Machines
This paper has investigated a method for calculating the frequency-dependent winding resistance of toroidal inductor windings with Litz-wire as well as solid-round wire.
Dae-Yong Um, Seung-Ahn Chae, Gwan-Soo Park   +2 more
doaj   +1 more source

Application of Artificial Neural Networks for Predicting Relative Permeability in Talang Akar Formation [PDF]

E3S Web of Conferences
Relative permeability is a substantial parameter for estimating multi-phase fluid flow in porous rocks. It is a complex physical property that is influenced by the behavior and interactions between the fluid and rock phases.
Fathaddin Muhammad Taufiq, Sari Alvita Kumala, Sutansyah Daddy, Ulfah Baiq Maulinda, Bae Wisup, Rakhmanto Pri Agung, Irawan Sonny   +6 more
doaj   +1 more source

Simulation Study of the Small-Signal Characteristics of Single-Phase Common-Mode Inductors with Capacitance Cancellation

Applied Sciences
This article proposes a simulation model of single-phase common-mode inductors to evaluate the small-signal characteristic of common-mode inductors when the stray capacitance cancellation method is applied.
Shotaro Takahashi
doaj   +1 more source

Frequency dependence of microwave complex permeability under magnetic bias

EPJ Web of Conferences, 2018
Measurement of the frequency dependence of the permeability under magnetic bias is proposed as a new method for studying the microwave magnetic properties of magnetic materials.
Shiryaev Artem O., Bobrovskii Stanislav Y., Osipov Aleksey V., Petrov Dmitry A., Rozanov Konstantin N., Starostenko Sergey N.   +5 more
doaj   +1 more source

The Percolation Properties of Electrical Conductivity and Permeability for Fractal Porous Media

Energies, 2019
Many cases have indicated that the conductivity and permeability of porous media may decrease to zero at a nonzero percolation porosity instead of zero porosity.
He Meng, Qiang Shi, Tangyan Liu, FengXin Liu, Peng Chen   +4 more
doaj   +1 more source

Evaluation of Core Samples from Low-Porosity and Low-Permeability Carbonate Reservoir with NMR Experiments

Chinese Journal of Magnetic Resonance, 2020
Well logging evaluation of the low-porosity and low-permeability carbonate reservoir is difficult because of its complex mineral composition, difficult to determine rock skeleton parameters, diverse types of reservoir space, complex pore structure and ...
ZHU Xue-juan, ZHANG Xiang-ming, SHAN Sha-sha   +2 more
doaj   +1 more source