Electromagnetic conductivity imaging (EMCI) of soil using a DUALEM-421 and inversion modelling software (EM4Soil)

Geoderma ◽  
2013 ◽  
Vol 211-212 ◽  
pp. 28-38 ◽  
Author(s):  
J. Triantafilis ◽  
F.A. Monteiro Santos
Keyword(s):  
Conductivity Imaging ◽  
And Inversion ◽  
Inversion Modelling

Reconnaissance scale mapping of salinity in three‐dimensions using EM38 and EM34 data and inversion modelling

2020 ◽  
Vol 31 (18) ◽  
pp. 2936-2951
Author(s):  
Jie Wang ◽  
Xueyu Zhao ◽  
Dongxue Zhao ◽  
Maryem Arshad ◽  
Ehsan Zare ◽  
...  
Keyword(s):  
Three Dimensions ◽  
And Inversion ◽  
Inversion Modelling

scholarly journals Exploration Disaster Source of Mine Water by Electromagnetic Radiation

2020 ◽  
Vol 26 (5) ◽  
pp. 16-21
Author(s):  
Benyu Su ◽  
Zhixiong Li ◽  
Rongyao Li ◽  
Rongfu Rao ◽  
Jingcun Yu
Keyword(s):  
Coal Seam ◽  
Electromagnetic Radiation ◽  
Underground Mining ◽  
Parameter Distribution ◽  
Forward Modelling ◽  
Electric Parameter ◽  
Inversion Theory ◽  
Deep Underground ◽  
And Inversion ◽  
Inversion Modelling

geological hazard in deep underground mining. Before the rock mass explosion, electromagnetic energy will radiate outward during the deformation and rupture of the coal rocks. Hence, it is possible to use the electromagnetic radiation to predict geological disasters in coal mines. A challenging task using the active source electromagnetic survey technique is to detect geological anomalies, such as disaster water sources and geological structures. To this end, this paper proposes a new electromagnetic radiation solution based on the forward and inversion theory to detect geological anomalies in the coal seam. Based on typical coal mine geological models, the forward modelling and inversion modelling have been performed, respectively. The forward modelling explained the geological anomalies inside the coal seam, which were very sensitive to the response of the radiated electromagnetic field; especially, for the water-bearing geological anomalies. The inversion modelling discovered that the inversion geo-electric parameter distribution agreed well with the actual model. As a result, the proposed method is feasible for geological anomalies detection.

Digital regolith mapping of clay across the Ashley irrigation area using electromagnetic induction data and inversion modelling

Geoderma ◽  
2019 ◽  
Vol 346 ◽  
pp. 18-29 ◽  
Author(s):  
Xueyu Zhao ◽  
Jie Wang ◽  
Dongxue Zhao ◽  
Nan Li ◽  
Ehsan Zare ◽  
...  
Keyword(s):  
Electromagnetic Induction ◽  
Irrigation Area ◽  
And Inversion ◽  
Inversion Modelling

Forward and inversion modelling of the ultrasonic wave in a homogeneous medium using P-wave transducers

2018 ◽  
Vol 2018 (1) ◽  
pp. 1-7
Author(s):  
Michel M. Nzikou ◽  
Alexey Yurikov ◽  
Mahyar Madadi ◽  
Maxim Lebedev ◽  
Boris Gurevich
Keyword(s):  
Ultrasonic Wave ◽  
Homogeneous Medium ◽  
P Wave ◽  
And Inversion ◽  
Inversion Modelling

Utilizing a DUALEM-421 and inversion modelling to map baseline soil salinity along toposequences in the Hunter Valley Wine district

2017 ◽  
Vol 33 (3) ◽  
pp. 413-424 ◽  
Author(s):  
U. Stockmann ◽  
J. Huang ◽  
B. Minasny ◽  
J. Triantafilis
Keyword(s):  
Soil Salinity ◽  
And Inversion ◽  
Inversion Modelling

The Fine Structure of the Sheath of Volvox Carteri f. Weismannia

1977 ◽  
Vol 35 ◽  
pp. 346-347
Author(s):  
Regina Birchem
Keyword(s):  
Developmental Stages ◽  
Ruthenium Red ◽  
Sulfated Polysaccharides ◽  
Volvox Carteri ◽  
High Voltage Electron Microscopy ◽  
Ultrastructural Studies ◽  
Voltage Electron ◽  
Sheath Formation ◽  
And Inversion ◽  
Sheath Material

Spheroids of the green colonial alga Volvox consist of biflagellate Chlamydomonad-like cells embedded in a transparent sheath. The sheath, important as a substance through which metabolic materials, light, and the sexual inducer must pass to and from the cells, has been shown to have an ordered structure (1,2). It is composed of both protein and carbohydrate (3); studies of V. rousseletii indicate an outside layer of sulfated polysaccharides (4).Ultrastructural studies of the sheath material in developmental stages of V. carteri f. weismannia were undertaken employing variations in the standard fixation procedure, ruthenium red, diaminobenzidine, and high voltage electron microscopy. Sheath formation begins after the completion of cell division and inversion of the daughter spheroids. Golgi, rough ER, and plasma membrane are actively involved in phases of sheath synthesis (Fig. 1). Six layers of ultrastructurally differentiated sheath material have been identified.

Exsolution and inversion in pigeonite from the Whin Sill, Northern England

1978 ◽  
Vol 36 (1) ◽  
pp. 474-475
Author(s):  
P.P.K. Smith
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Homogeneous Nucleation ◽  
Silicate Mineral ◽  
Antiphase Boundaries ◽  
Two Phase ◽  
Primitive Form ◽  
The Core ◽  
Nucleation Mechanisms ◽  
And Inversion

Grains of pigeonite, a calcium-poor silicate mineral of the pyroxene group, from the Whin Sill dolerite have been ion-thinned and examined by TEM. The pigeonite is strongly zoned chemically from the composition Wo8En64FS28 in the core to Wo13En34FS53 at the rim. Two phase transformations have occurred during the cooling of this pigeonite:- exsolution of augite, a more calcic pyroxene, and inversion of the pigeonite from the high- temperature C face-centred form to the low-temperature primitive form, with the formation of antiphase boundaries (APB's). Different sequences of these exsolution and inversion reactions, together with different nucleation mechanisms of the augite, have created three distinct microstructures depending on the position in the grain.In the core of the grains small platelets of augite about 0.02μm thick have farmed parallel to the (001) plane (Fig. 1). These are thought to have exsolved by homogeneous nucleation. Subsequently the inversion of the pigeonite has led to the creation of APB's.

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