Temat: conductivity measurement - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Soil moisture and bulk electrical conductivity variability measured by TDR
Autorzy:: Sobczuk, H.A.
Zhixiong, C.
Liuzong, Z.
Powiązania:: https://bibliotekanauki.pl/articles/24636.pdf
Data publikacji:: 1996
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: variability
soil heterogeneity
electrical conductivity
soil water
measurement
soil moisture
water content
Źródło:: International Agrophysics; 1996, 10, 4
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Simultaneous measurement of oxygen flux and salinity of the water saturated mineral soils
Autorzy:: Bieganowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/24164.pdf
Data publikacji:: 2003
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: mineral soil
simultaneous measurement
electrical conductivity
saturated soil
oxygen flux
soil oxygen
soil salinity
water
salinity
flux density
Źródło:: International Agrophysics; 2003, 17, 3
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Diagnozowanie stanu zdrowotnego drzew świerka i jodły na podstawie oceny patologicznych zmian drewna korzeni grubych
Diagnosing the health condition of spruce and fir trees on the basis of pathological changes in coarse root wood
Autorzy:: Stępień, E.
Powiązania:: https://bibliotekanauki.pl/articles/1008708.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
drzewa lesne
swierk
Picea
jodla
Abies
stan zdrowotny drzew
diagnostyka
korzenie grube
metody badan
badania makroskopowe
przewodnictwo elektryczne
pathological changes
root wood
spruce
fir
macroscopic measurement
electrical conductivity
crown thinning
radial increment
Opis:: The paper contains a description and results of direct and indirect methods for assessing pathological changes in the zone of coarse root wood of spruce and fir trees. It also provides an evaluation of the effect of the type of changes and width of the unchanged wood zone on the electrical conductivity. The macroscopic analysis was compared with the results of electrical current measurements and the effect of the detected changes on crown condition and diameter increment of trees.
Źródło:: Sylwan; 2012, 156, 08; 599-606
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Four-parameter electromagnetic method for determining the parameters of brewery effluents
Autorzy:: Sebko, V. V.
Pyrozhenko, Ye. V.
Zashchepkina, N. M.
Zdorenko, V. G.
Markina, O. M.
Powiązania:: https://bibliotekanauki.pl/articles/2201046.pdf
Data publikacji:: 2022
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: four-parameter electromagnetic method
brewery effluents
magnetic flux probe
MFP
conversion function
joint measurement
electrical conductivity
relative permittivity
density
temperature
metoda elektromagnetyczna
ścieki
strumień magnetyczny
funkcja konwersji
przewodność elektryczna
względna przenikalność elektryczna
gęstość
temperatura
Opis:: Purpose of the article is to study a four-parameter electromagnetic method for joint measurements of electrical resistivity k, relative permittivity εr, temperature t and density ρ of samples of acidic, alkaline and average effluents from a microbrewery based on a magnetic flux probe (MFP), which considers the influence of informative parameters of beer effluents on the components of the amplitude and phase signals of a multiparameter device. Design/methodology/approach The implementation of the four-parameter method is carried out on the basis of the dependences G1 = f (A1) and G2 = f (A2) at two frequencies of the electromagnetic field f0 and f1 for acid, alkaline and average effluent and allows you to jointly determine the four parameters of effluent samples with the same converter in the same control area. The proposed method makes it possible to improve the accuracy of identifying effluent samples since the obtained multiparameter information makes it possible to determine the nature and properties of effluent samples using only one transducer with certain physical characteristics. The research results lead to the expansion of the technical capabilities of electromagnetic measurement methods, as well as to an increase in the metrological characteristics of electromagnetic transducers and an increase in the accuracy of measuring the parameters of effluent samples compared to reference methods and measuring instruments. Thus, the implementation of this approach contributes to the prediction and prevention of the reasons for the deviation of beer effluent samples from the specified indicators of environmental safety. Findings The universal conversion functions MFP have been established, connecting the amplitude and phase components of the converter signals with the parameters k, εr, t and ρ of acidic, alkaline and average effluents. Based on the universal transformation functions G1 = f (A1) and G2 = f (A2), a four-parameter electromagnetic method for joint measurements of electrical resistivity k, relative permittivity εr, temperature t and density ρ of acidic, alkaline, and average effluents from breweries has been developed. When conducting research at two close frequencies of the electromagnetic field f0 = 20.3 MHz and f1 = 22 MHz, algorithms were obtained for measuring and calculating procedures for determining k, εr, t and ρ for samples of acidic, alkaline and average effluents from the brewing industry. Research limitations/implications Research perspectives consist in the creation of automated systems for multiparameter measuring control of the physicochemical characteristics of acidic and alkaline effluent from food and processing industries based on the immersed electromagnetic transducer. Based on the data obtained using informative methods to measure the parameters of effluent samples, an integrated method for treating beer effluents of various compositions will be proposed. At the same time, the scheme of the integrated treatment method should include a filter that provides the introduction of a magnetic fluid and a separation device that allows us to remove a fraction, including pollution in itself. Practical implications Is that the proposed four-parameter electromagnetic method makes it possible to determine to what composition the controlled samples of wastewater should be attributed (acidic or alkaline). It, in turn, makes it possible to choose a rational method for treating beer effluents and to prevent the reasons for the deviation of effluent samples from the environmental safety indicators set by the standards. Originality/value of the article is the research related to the expansion of the functional and technical capabilities of the electromagnetic two-frequency transducer MFP through the implementation of a four-parameter electromagnetic method of joint measurements of electrical resistivity k, relative permittivity εr, temperature t and density ρ of acidic, alkaline and average effluents from breweries. The universal transformation functions G1 = f (A1) and G2 = f (A2) found in the work at two close magnetic field frequencies, f0 = 20.3 MHz and f1 = 22 MHz, make it possible to control four physicochemical parameters of acidic, alkaline and average wastewater at the same time by the same MFP. An algorithm has been developed for determining the signal components of a two-frequency thermal MFP, the ranges of which correspond to the ranges of changes in electrical resistivity k, relative permittivity εr, temperature t and density ρ of acidic, alkaline, and average brewery effluents. The basic relations that describe the two-frequency four-parameter electromagnetic method of joint measurements of the physicochemical parameters of acidic, alkaline and averaged beer effluents have been obtained.
Źródło:: Journal of Achievements in Materials and Manufacturing Engineering; 2022, 113, 2; 49--64
1734-8412
Pojawia się w:: Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:: Biblioteka Nauki

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