scholarly journals Physical properties as a key factor in the soil functioning in Chernevaya Taiga (Western Siberia)

2021 ◽  
Vol 862 (1) ◽  
pp. 012036
Author(s):  
E Abakumov ◽  
S Loyko ◽  
G Istigechev ◽  
A Lapidus
Keyword(s):  
Physical Properties ◽  
Western Siberia ◽  
Soil Functioning ◽  
Key Factor

scholarly journals METHODOLOGICAL APPROACHES TO PREDICTING THE MINERAL-COMPONENT COMPOSITION OF THE BAZHENOV FORMATION BASED ON «CORE-LOGGING» INTERCONNECTIONS

2021 ◽  
Vol 2 (1) ◽  
pp. 236-245
Author(s):  
Rashid M. Saitov ◽  
Mikhail A. Fomin ◽  
Elena A. Kostyreva ◽  
Svetlana V. Rizhkova ◽  
Inga S. Sotnich ◽  
...  
Keyword(s):  
Experimental Data ◽  
Physical Properties ◽  
Western Siberia ◽  
Component Composition ◽  
Mineral Component ◽  
Bazhenov Formation ◽  
Core Logging ◽  
Methodological Approaches ◽  
Lithological Composition

The article presents a methodology developed by the authors for calculating the lithological composition of the Bazhenov Formation in Western Siberia. It is based on the identified “core-logging” interconnections between the mineral-component composition of rocks and the physical properties of the section. The convergence of experimental data and calculated values is shown. The proposed technique was tested. The conditions of its applicability have been substantiated.

Assessing grouting mix thermo-physical properties for shallow geothermal systems

2020 ◽  
Author(s):  
Enrico Garbin ◽  
Ludovico Mascarin ◽  
Eloisa Di Sipio ◽  
Gilberto Artioli ◽  
Javier Urchueguía ◽  
...  
Keyword(s):  
Physical Properties ◽  
Heat Exchangers ◽  
Low Cost ◽  
Injection Pressure ◽  
Geothermal Systems ◽  
Geothermal Heat ◽  
Key Factor ◽  
Geological Formations ◽  
Thermo Physical Properties

<p>The main goal of the EU funded GEO4CIVHIC project is the development of more efficient and low-cost geothermal systems for conditioning retrofitting civil and historical buildings. In this framework, the identification of the most appropriate grout for different heat exchangers is a key factor for improving the overall efficiency of shallow geothermal systems. Therefore, a dedicated investigation was focused on the selection and optimization of the thermo-physical properties of grouting products to be used for:</p><ul><li>the sealing of the coaxial geothermal probes’ head characterized by different installation depths</li> <li>the sealing of the coaxial geothermal heat exchangers by filling the annular gap between the outer casing and the geological formations exposed to the wellbore</li> </ul><p> </p><p>In both cases, the thermo-physical behavior of conventional and thermal enhanced grouts has been determined in laboratory for the purpose of manufacturing satisfactory cement based grouts with a real in-situ application. On the one hand, it is important to identify the grout mixtures having a suitable in situ workability, that is those satisfying specific conditions in terms of injection pressure, grout flowability, open working time and costs. On the other, it is essential to determine those providing optimal heat transfer between the probe and the surrounding ground.</p><p>Several lab experiments were performed on commercially available and enhanced selected mixtures to define (i) the workability and the flowability of the grouts; (ii) fundamental properties like mechanical strength, thermal conductivity and permeability of the hardened materials; (iii) leakage and calorimetric behavior, useful to identify sealing properties and grout setting times; (iv) viscosity and (v) density of the cement based mixture able to give information about the grout rate of descent and thus its pumpability under pressure.</p><p>Lastly, according to the lab results, few grout mixtures were selected as the best choice to be applied in situ for sealing the head of the geothermal probes’ and the annular space between the outer casing and the geological formations exposed to the wellbore. Therefore, this work attempts to address a knowledge gap of the thermo-physical properties, behavior and characterization of grouts for borehole heat exchangers (BHE), that are little studied and known.</p><p> </p>

scholarly journals Physical properties of four ring-porous hardwood species: influence of wood rays on tangential and radial wood shrinkage

2019 ◽  
Vol 25 (2) ◽  
Author(s):  
Mohamed Tahar Elaieb ◽  
Foued Shel ◽  
Mounir Jalleli ◽  
Patrick Langbour ◽  
Kévin Candelier
Keyword(s):  
Physical Properties ◽  
Wood Species ◽  
Basic Density ◽  
Castanea Sativa ◽  
Quercus Petraea ◽  
Anisotropy Ratio ◽  
Analysis Method ◽  
Hardwood Species ◽  
Key Factor ◽  
Quercus Canariensis

Some relationships between ray proportions, strength and shrinkage properties and basic density in hardwood species were highlighted. A better understanding of their relationships caused by the variation in moisture content in the hygroscopic domain could be a key factor in determining of wood stability properties and to determine the choice of a specific wood species according to its service life condition. The objectives of this study were (i) to determine the physical properties of various ring porous wood species (ii) and to evaluate the influence of wood rays (according to their proportions and volume) on physical properties of wood and more particularly on the Transverse Anisotropy Ratio for Shrinkage (TARS). This study focused on four ring-porous hardwood species; Castanea sativa, Quercus canariensis, Quercus petraea and Quercus robur, differing by the presence and abundance of their multiseriate wood rays. Basic densities, tangential shrinkages, radial shrinkages and the TARS of heartwood and sapwood from each wood species were determined. Wood-rays’ proportions and volume were measured by the image analysis method, and their influence on the last three shrinkages was investigated. A significant correlation between wood ray proportions, wood shrinkage values and basic density was observed.

Research on the Spinning Process of Ni-Fe Fibers

2014 ◽  
Vol 1053 ◽  
pp. 103-106
Author(s):  
Rui Fang Cui ◽  
Zhi Yuan Peng ◽  
Sai Nan Wei
Keyword(s):  
Wear Resistance ◽  
Physical Properties ◽  
Orthogonal Design ◽  
Yarn Twist ◽  
Key Factor ◽  
Spinning Process ◽  
Twist Spinning

Based on the physical properties of Ni-Fe fiber, the orthogonal design was adopted to determine the parameters including roving twist, back zone drafting multiple and yarn twist, and the strength and wear resistance of the produced five kinds of yarns were tested and analyzed. The results show that to solve the problem of mixing uniformity of Ni-Fe Fibers, the suitable drawing numbers can be adopted. And the appropriate roving twist, spinning back zone drafting multiple and yarn twist are key factor of resultant yarn.

Low-frequency amplitude analysis for oil detection within the Middle Jurassic sediments in the southern part of Western Siberia

2014 ◽  
Vol 2 (4) ◽  
pp. SP35-SP43 ◽  
Author(s):  
Gennady Goloshubin ◽  
Yury Tsimbalyuk ◽  
Irina Privalova ◽  
Pavel Rusakov
Keyword(s):  
Seismic Data ◽  
Middle Jurassic ◽  
Western Siberia ◽  
Low Frequency ◽  
Well Testing ◽  
Amplitude Analysis ◽  
Structural Element ◽  
Key Factor ◽  
Water Saturated ◽  
Hydrocarbon Deposits

The structural element of a prospect is not a key factor in the detection of hydrocarbon deposits within the Jurassic formations of the southern parts of the West Siberian province. We investigated a method of mapping oil-saturated zones within the Middle Jurassic reservoirs. We evaluated the quantitative criteria between oil-saturated versus water-saturated zones. The methodology was based on amplitude analysis of seismic data and information obtained from the data and well testing.

Influence of Land Use on the Physical Properties of Chernozems in the Forest-Steppe Zone of Western Siberia

2021 ◽  
Vol 54 (9) ◽  
pp. 1337-1349
Author(s):  
I. N. Kurganova ◽  
V. O. Lopes de Gerenyu ◽  
E. N. Smolentseva ◽  
M. P. Semenova ◽  
V. I. Lichko ◽  
...  
Keyword(s):  
Land Use ◽  
Physical Properties ◽  
Western Siberia ◽  
Steppe Zone ◽  
Forest Steppe

scholarly journals Influence of main processing methods on the water-physical properties of the soil and soybean yield in Western Siberia

2020 ◽  
pp. 21-24
Author(s):  
Elena Aleksandrovna Krasnova ◽  
Valentina Vasilevna Rzaeva ◽  
Aleksandr Sergeevich Lynkov
Keyword(s):  
Plant Growth ◽  
Physical Properties ◽  
Water Availability ◽  
Growth And Development ◽  
Western Siberia ◽  
Soil Treatment ◽  
Soil Density ◽  
Plant Growth And Development ◽  
Depth Of Processing ◽  
Tillage Methods

The results of research on the influence of basic tillage methods on agrophysical indicators in soybean cultivation are presented. Over the years of research (2017-2019), the soil density (0-30 cm) during soybean cultivation according to the studied methods of basic tillage was optimal for plant growth and development and was within the range of 1.00-1.27 g/cm3 before sowing; 1.05-1.19 g/cm3 during the branching phase; 1.10-1.36 g/cm3 before harvesting. The reserves of available moisture before sowing in the twenty-centimeter layer of soil were characterized by satisfactory and good security (30.4-43.0 mm), the meter layer-good and very good security (150.8-172.3 mm) on variants with soil treatment and satisfactory at zero treatment-125.1 mm. In the phase of soybean branching, the available moisture reserves at a depth of 0-20 cm were characterized by satisfactory water availability (31.0-35.6 mm) and good (159.6-160.6 mm) in the meter layer of soil. Before cleaning, the available moisture reserves were characterized by satisfactory security. The highest yield was obtained by a differentiated method of tillage (20-22 cm) with an excess of control (dump method, 20-22 cm) by 0.06 t/ha. A decrease in the depth of processing (12-14cm) led to a decrease in the yield of soybean grain by 0.07-0.11 t/ha for the studied methods of basic soil treatment.

The Photometric Properties of the Ap Stars

1976 ◽  
Vol 32 ◽  
pp. 365-377 ◽  
Author(s):  
B. Hauck
Keyword(s):  
Physical Properties ◽  
Ap Stars

The Ap stars are numerous - the photometric systems tool It would be very tedious to review in detail all that which is in the literature concerning the photometry of the Ap stars. In my opinion it is necessary to examine the problem of the photometric properties of the Ap stars by considering first of all the possibility of deriving some physical properties for the Ap stars, or of detecting new ones. My talk today is prepared in this spirit. The classification by means of photoelectric photometric systems is at the present time very well established for many systems, such as UBV, uvbyβ, Vilnius, Geneva and DDO systems. Details and methods of classification can be found in Golay (1974) or in the proceedings of the Albany Colloquium edited by Philip and Hayes (1975).

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