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Analysis of Electromagnetic Field on the Permeability Test of Concrete
2012 Asia-Pacific Power and Energy Engineering Conference, 2012The method of water pressure measuring permeability of concrete has a long test cycle, low efficiency, and doesn't apply to low permeability of concrete. The method based on electricity can overcome these shortcomings. This paper puts forward the method of streaming potential coefficient to measure the permeability of concrete, which is reasonable ...
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Electromagnetic Waves in Media With Correlated Inhomogeneity of Permittivity and Permeability
Journal of Applied Spectroscopy, 2014The propagation of electromagnetic waves is examined in inhomogeneous media where the product of the permittivity and permeability is independent of position. A plasma-like frequency dispersion of the refractive index in these media is predicted. It is established that there is a cutoff frequency below which electromagnetic waves cannot be excited in ...
A. N. Serdyukov +2 more
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Reflection of electromagnetic waves at the corrugated boundary between permeable dielectrics [PDF]
Journal of Physics D: Applied Physics, 1994 The reflectivity of periodically corrugated boundaries between non-lossy, isotropic dielectrics with different magnetic permeabilities is studied in a regime where the grating supports only a specularly reflected order. The propagation direction of the incident plane wave may form arbitrary angles with the normal to the mean surface and with the ...
R A Depine, M Lester
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An Electromagnetic Cantilever Generator with High-Permeability Magnetic Materials
2018 IEEE 13th Annual International Conference on Nano/Micro Engineered and Molecular Systems (NEMS), 2018This paper presented an electromagnetic cantilever generator (EMCG) of high energy density with high-permeability magnetic materials for harvesting ambient vibrational energy. We utilized a flexible cantilever connecting with a pair of magnets on the free end, and the coils with high-permeability magnetic materials are set right in front of the magnets.
Yan Peng +5 more
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THE NEGATIVE PERMITTIVITY AND PERMEABILITY CHARACTERISTICS OF TRIANGULAR ELECTROMAGNETIC RESONATORS
International Journal of Modern Physics B, 2011In this paper, the triangular electromagnetic resonators (TERs) is introduced and investigated. The electric mode at lower frequency and magnetic mode at higher frequency, originating from coupling to the electric field and magnetic field, are validated through the measurement in parallel-plate waveguide system, parameter retrieval algorithm and ...
Cheng Zhu, Lixiang Li, Chang-Hong Liang
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Electromagnetic-heating enhancement of source rock permeability for high recovery
Fuel, 2021Abstract Source rock shales have permeability in the nano-Darcy range and require drilling long horizontal wells and extensive hydraulic fracturing to commercially produce hydrocarbons. Recently, an electromagnetic (EM) thermal method was proposed as a primary, or secondary, stimulation method to produce light hydrocarbons from extremely tight ...
Qiushi Sun +6 more
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Progress In Interpretation Of Transient Electromagnetic Data In Terms Of Subsurface Permeability
9th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, 1996The relative importance of nonpoint-source (NPS) pollution in the degradation of water quality has increased in the last two decades due to the control of pollutant releases from point sources (Sharpley and Meyer 1994). The most important source of NPS pollutants are agriculture and urban areas, which impact water quality in rivers, lakes, estuaries ...
C.N. Burden +3 more
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Mitochondrial Membrane Permeability After Nanosecond Electromagnetic Pulsed Exposure [PDF]
2018 20th International Symposium on High-Current Electronics (ISHCE), 2018 The purpose of the presented study was to reveal the possibility to induce electric pores and/or to open permeability transition pore in the mitochondria of normal and tumor cells after nanosecond pulsed electromagnetic exposure. Cell suspensions were exposed to two type of pulses: 10GHz microwave pulses with duration of 100 ns and 1.0 GHz RF pulses ...
Ilya V. Romanchenko +5 more
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The influence of magnetic conductor permeability on the efficiency of strong-field electromagnets
Journal of Magnetism and Magnetic Materials, 1995Abstract Studies were made of the influence of the permeability of a magnetic conductor made of cast iron (3.2% carbon) and steel (0.2% carbon) on the efficiency of strong-field electromagnets. The permeability was modified within the range 1000–5000 via thermal treatment of the metal in the temperature range 1000–1300°C in vacuum.
D.D. Mishin, D.D. Mishin
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Electromagnetic Models for UXO Detection and Classification in Permeable Soils
2008Abstract : Support Vector Machine (SVM) and neural networks (NN), are applied to classifying metallic objects according to size using the expansion coefficients of their magneto-quasistatic (MQS) response in the spheroidal coordinate system. The classified objects include homogeneous spheroids and composite metallic assemblages meant to resemble ...
Bae-Ian Wu +3 more
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